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Sample records for experimental chicken sheds

  1. Synthetic sex pheromone attracts the leishmaniasis vector Lutzomyia longipalpis to experimental chicken sheds treated with insecticide

    Directory of Open Access Journals (Sweden)

    Brazil Reginaldo P

    2010-03-01

    Full Text Available Abstract Background Current strategies for controlling American visceral leishmaniasis (AVL have been unable to prevent the spread of the disease across Brazil. With no effective vaccine and culling of infected dogs an unpopular and unsuccessful alternative, new tools are urgently needed to manage populations of the sand fly vector, Lutzomyia longipalpis Lutz and Neiva (Diptera: Psychodidae. Here, we test two potential strategies for improving L. longipalpis control using the synthetic sand fly pheromone (±-9-methylgermacrene-B: the first in conjunction with spraying of animal houses with insecticide, the second using coloured sticky traps. Results Addition of synthetic pheromone resulted in greater numbers of male and female sand flies being caught and killed at experimental chicken sheds sprayed with insecticide, compared to pheromone-less controls. Furthermore, a ten-fold increase in the amount of sex pheromone released from test sheds increased the number of females attracted and subsequently killed. Treating sheds with insecticide alone resulted in a significant decrease in numbers of males attracted to sheds (compared to pre-spraying levels, and a near significant decrease in numbers of females. However, this effect was reversed through addition of synthetic pheromone at the time of insecticide spraying, leading to an increase in number of flies attracted post-treatment. In field trials of commercially available different coloured sticky traps, yellow traps caught more males than blue traps when placed in chicken sheds. In addition, yellow traps fitted with 10 pheromone lures caught significantly more males than pheromone-less controls. However, while female sand flies showed a preference for both blue and yellow pheromone traps sticky traps over white traps in the laboratory, neither colour caught significant numbers of females in chicken sheds, either with or without pheromone. Conclusions We conclude that synthetic pheromone could

  2. Newcastle Disease Virus Shedding Among Healthy Commercial Chickens and its Epidemiological Importance

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    Okwor Emmanuel Chukwudi, Eze Didacus Chukwuemeka* and Umeh Mary

    2012-06-01

    Full Text Available Newcastle disease virus (NDV, shedding among apparently healthy commercial chickens reared intensively in Nsukka and its environs were studied. Samples were collected from birds that were not vaccinated against Newcastle disease (ND, and also from those that were vaccinated but given an interval of 28 days between vaccination and sample collection. Cloacal and tracheal swabs were collected from each bird and a total of 1800 birds were sampled from 72 farms located in the area. The birds in the area were monitored for 15 days post sampling. The samples were examined for NDV by isolation in embryonated chicken eggs through the allantoic cavity route. Result showed an isolation frequency of 3.2% and this could be termed as the prevalence of NDV in clinically healthy chickens in Nsukka area as the birds remained apparently healthy for more than 15 days. We therefore conclude that there is virus shedding among healthy commercial chickens in Nsukka and its environs and this should be considered an important epidemiological factor in the spread of the disease. Healthy carriers can serve as short term reservoirs and transmit the disease to other birds.

  3. Efficacy of bacterin-, outer membrane protein- and fimbriae extract-based vaccines for the control of Salmonella Enteritidis experimental infection in chickens

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    Márcia C. Menão

    2013-03-01

    Full Text Available The efficacy of three vaccines was evaluated in chickens for the control of experimental infection with Salmonella Enteritidis (SE phage type 4. The vaccines were produced with bacterin, outer membrane proteins (OMP and fimbriae crude extract (FE. The chickens were vaccinated intramuscularly with two doses of each vaccine at 12 and 15 weeks of age. The chickens were then orally challenged with 10(9 CFU/chicken Salmonella Enteritidis phage type 4 at 18 weeks of age. Fecal swabs were performed for the recovery of shedding SE, and SE was recovered from the liver and spleen. Additionally, antibody titers were measured in the serum by micro-agglutination test. The results indicated that the vaccine produced with bacterin yielded better results and resulted in reduction of fecal shedding and organ invasion by SE after oral challenge, although no vaccine was 100% effective for the control of SE experimental infection.

  4. Blood biochemistry responses of chickens experimentally infected ...

    African Journals Online (AJOL)

    This study investigated the blood biochemistry responses of cockerels experimentally infected with a velogenic Newcastle disease virus (NDV) strain, KUDU 113. One hundred Isa white cockerels were used for the study. The cockerels were obtained at day-old and randomly divided into groups A- vaccinated and infected, ...

  5. Detection of infectious laryngotracheitis virus by real-time PCR in naturally and experimentally infected chickens.

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    Yan Zhao

    Full Text Available Infectious laryngotracheitis (ILT is an acute, highly contagious upper-respiratory infectious disease of chickens. In this study, a real-time PCR method was developed for fast and accurate detection and quantitation of ILTV DNA of chickens experimentally infected with ILTV strain LJS09 and naturally infected chickens. The detection lower limit of the assay was 10 copies of DNA. There were no cross reactions with the DNA and RNA of infectious bursal disease virus, chicken anemia virus, reticuloendotheliosis virus, avian reovirus, Newcastle disease virus, and Marek's disease virus. The real-time PCR was reproducible as the coefficients of variation of reproducibility of the intra-assay and the inter-assay were less than 2%. The real-time PCR was used to detect the levels of the ILTV DNA in the tissues of specific pathogen free (SPF chickens infected with ILTV at different times post infection. ILTV DNA was detected by real-time PCR in the heart, liver, spleen, lung, kidney, larynx, tongue, thymus, glandular stomach, duodenum, pancreatic gland, small intestine, large intestine, cecum, cecal tonsil, bursa of Fabricius, and brain of chickens in the infection group and the contact-exposure group. The sensitivity, specificity, and reproducibility of the ILTV real-time PCR assay revealed its suitability for detection and quantitation of ILTV in the samples from clinically and experimentally ILTV infected chickens.

  6. Experimental infections with rifampicin-resistant Clostridium perfringens strains in broiler chickens using isolator facilities

    DEFF Research Database (Denmark)

    Pedersen, Karl; Bjerrum, Lotte; Nauerby, Birgitte

    2003-01-01

    Experimental infection studies were carried out on the ability of three Clostridium perfringens type A rifampicin-resistant strains to colonize the intestinal tract of broiler chickens kept in isolators from 1-day-old. Various doses of C. perfringens were given orally at 22 days, 9 days or at 1 day...... replaced by naturally occurring strains of C. perfringens in all groups but they persisted for considerably longer in chickens inoculated at 1-day-old or at 9 days than those at 22 days, indicating a possible resistance to colonization with increasing age. The findings emphasize the difficulties...... of establishing a reproducible model for infection with C. perfringens in broiler chickens....

  7. Salmonella Enteritidis experimental infection in chickens: Effects of ...

    African Journals Online (AJOL)

    STORAGESEVER

    2008-10-20

    Oct 20, 2008 ... chickens: Effects of challenge dose on serum immunoglobulin G antibody response. Ishola, Olayinka Olabisi1* and Holt, Peter.S.2. 1Department of Veterinary Public Health and Preventive Medicine, University of Ibadan, Ibadan, Nigeria. 2Egg Safety and Quality Research Unit, United States Department of ...

  8. Experimental-confirmation and functional-annotation of predicted proteins in the chicken genome

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    McCarthy Fiona M

    2007-11-01

    Full Text Available Abstract Background The chicken genome was sequenced because of its phylogenetic position as a non-mammalian vertebrate, its use as a biomedical model especially to study embryology and development, its role as a source of human disease organisms and its importance as the major source of animal derived food protein. However, genomic sequence data is, in itself, of limited value; generally it is not equivalent to understanding biological function. The benefit of having a genome sequence is that it provides a basis for functional genomics. However, the sequence data currently available is poorly structurally and functionally annotated and many genes do not have standard nomenclature assigned. Results We analysed eight chicken tissues and improved the chicken genome structural annotation by providing experimental support for the in vivo expression of 7,809 computationally predicted proteins, including 30 chicken proteins that were only electronically predicted or hypothetical translations in human. To improve functional annotation (based on Gene Ontology, we mapped these identified proteins to their human and mouse orthologs and used this orthology to transfer Gene Ontology (GO functional annotations to the chicken proteins. The 8,213 orthology-based GO annotations that we produced represent an 8% increase in currently available chicken GO annotations. Orthologous chicken products were also assigned standardized nomenclature based on current chicken nomenclature guidelines. Conclusion We demonstrate the utility of high-throughput expression proteomics for rapid experimental structural annotation of a newly sequenced eukaryote genome. These experimentally-supported predicted proteins were further annotated by assigning the proteins with standardized nomenclature and functional annotation. This method is widely applicable to a diverse range of species. Moreover, information from one genome can be used to improve the annotation of other genomes and

  9. Differences in intermittent and continuous fecal shedding patterns between natural and experimental Mycobacterium avium subspecies paratuberculosis infections in cattle

    Science.gov (United States)

    The objective of this paper is to study shedding patterns of cows infected with Mycobacterium avium subsp. paratuberculosis (MAP). While multiple single farm studies of MAP dynamics were reported, there is not large-scale meta-analysis of both natural and experimental infections. Large difference...

  10. Effect of resinous extract from Commiphora swynnertonii (Burrt) on experimental coccidial infection in chickens.

    Science.gov (United States)

    Bakari, Gaymary G; Max, Robert A; Mdegela, Robinson H; Phiri, Elliot C J; Mtambo, Mkumbukwa M A

    2013-02-01

    A crude resinous extract from Commiphora swynnertonii was tested against an experimental coccidial infection in local chickens. A total of 80 growing chickens were randomly assigned into five groups, which received different treatments. Chickens in G1 were not infected with coccidian oocysts and therefore served as a negative control. All chickens in G2, G3, G4 and G5 were infected through oral administration of coccidian oocysts suspension at a dosed rate of 1.5 × 10(4) Eimeria spp. oocysts per bird. Starting from day 3 post-infection (p.i), chickens in different groups were treated for 7 consecutive days as follows: G1 and G2 (positive control) received 5 ml of normal saline as placebo, G3 and G4 were given the extract at 400 and 800 mg/kg bodyweight whereas G5 received anticoccidial drug. Clinical signs, bodyweights, oocysts counts and mortality rates were observed regularly. Results showed that oral administration of the resinous extract to chickens with coccidiosis significantly reduced mortality rate from 94 to 25 % and oocysts counts from 1.03 × 10(5) to 6.55 × 10(3) oocysts/g faeces (p < 0.05). Also a body condition score chart indicated less severe clinical signs of the disease in the groups which received the extract. Mean daily body weights were slightly reduced by the administration of the extract but this effect disappeared by day 7 p.i. These findings clearly indicate that resinous extract from C. swynnertonii has significant anticoccidial effect against experimental Eimeria spp. infection in chickens. A larger field trial to validate the use of the extract in chickens naturally infected with Eimeria spp. is required.

  11. EXPERIMENTALLY-DERIVED FORMULA FOR COMPUTING SERUM OSMOLARITY IN CHICKENS

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    RODICA CĂPRIŢĂ

    2007-10-01

    Full Text Available Osmolarity is a colligative property of solutions that depends on the number ofdissolved particles. The three types of solutes most encountered in biological fluidsare electrolytes, organic non-electrolyte molecules and colloids. The osmolarity ofthe extracellular fluid is about equal to that of the intracellular fluid, although thereare significant differences in the ionic composition of the two compartments. Plasmaosmolarity is a convenient and accurate guide to intracellular osmolarity. There areseveral different formulas for the calculation of human serum osmolarity. The goalof this study is to estimate the plasma osmolarity in chickens from theconcentrations of the main electrolytes and the glucose and urea content, and toestablish the contribution of each osmotic component. Linear regression analysiswas carried out to determine the best predictors of serum osmolarity in chickens.Two equations were also deduced for calculating serum osmolarity using manualregression analysis.

  12. Effects of shear on vortex shedding patterns in high Reynolds number flow: an experimental study

    Energy Technology Data Exchange (ETDEWEB)

    None

    1980-01-01

    Vortex shedding has been identified as a potential major source of loading on the Ocean Thermal Energy Conversion (OTEC) Plant Cold Water Pipe (CWP). To gain a better understanding of the vortex shedding phenomena, a series of model tests has been conducted. The results of this investigation are presented. The effects of current shear on vortex shedding patterns in high Reynolds number (R/sub e/) flow around a circular cylinder used to model the OTEC CWP are addressed. Tests were conducted in a wind tunnel on a 56-inch long, 6-inch diameter circular cylinder for various flow and shear conditions. Measurements were conducted to describe the frequencies of the eddies shed from the cylinder and to investigate the fluctuating surface pressure on the cylinder. From these tests it was determined that shedding for high R/sub e/ sheared flow is characterized by the formation of distinct cells of eddies with constant frequency, that pressure fluctuations on the surface of the cylinder are greater for sheared flow than unsheared flow, and that the mean surface pressures are generally independent of the magnitude of shear.

  13. Experimental induction of hemorrhagic-aplastic anemia in chickens. II. Serum protein changes.

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    Naqi, S A; Pugh, R; Glass, S E; Hall, C F

    1978-01-01

    The serologic response of chickens to infectious bursal disease virus (IBDV) and inclusion body hepatitis virus (IBHV) was analyzed. Inoculation at one day old with either IBDV or IBHV significantly (P less than 0.05) reduced levels of serum gamma-globulins at 4 weeks postinoculation. This response was not elicited by inoculation of IBDV together with IBHV. Birds with experimentally induced or naturally occurring hemorrhagic anemia syndrome (HAS) had serum proteins quantitatively and qualitatively changed from those of controls. Serum protein profiles did not coincide, however, in experimentally infected and naturally infected chickens. Among naturally infected chickens, those that were IBHV-positive upon culture had significantly (P less than 0.05) lower hematocrit values.

  14. Experimental oleander (Nerium oleander) intoxication in broiler chickens (Gallus gallus).

    Science.gov (United States)

    Omidi, Arash; Razavizadeh, Alireza T; Movassaghi, Ahmad R; Aslani, Mohammad R

    2012-08-01

    Dried leaves of oleander were orally given at a single dose of 500 mg/kg body weight to 20 clinically healthy male chickens. Clinical signs of toxicosis began to appear about 1 h after receiving the oleander and included hypersalivation, vomiting, diarrhea, deep depression, and sudden death. Also, hyperemia in the combs and wattles was obviously seen. Electrocardiograms (ECG) were repeatedly recorded at 30 min intervals. ECGs findings included increasing the QRS duration in some birds and various kinds of arrhythmias. Bradycardia was the most frequently detected finding (30.43%). During necropsy, there were congestion and hemorrhages in the visceral organs particularly in heart, liver, kidney, and lung. Histopathology revealed myocardial cell necrosis with hyperemia and hemorrhage, severe diffuse pulmonary congestion and edema, severe renal congestion and hemorrhage with tubular necrosis, and coagulative necrosis of hepatocytes with hyperemia and hemorrhage. There were also congestion, mild epithelial necrosis and desquamation with infiltration of mononuclear inflammatory cells in the proventriculus of all birds. There was also mild to moderate congestion in the intestines with scattered necrosis of surface enterocytes. The lack of information about the toxicity of oleanders in poultry was the main cause for this study. The results suggest that chickens appear to respond to oleander poisoning in a manner similar to other species.

  15. Anticoccidial effect of Piper sarmentosum extracts in experimental coccidiosis in broiler chickens.

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    Wang, Dingfa; Zhou, Luli; Li, Wei; Zhou, Hanlin; Hou, Guanyu

    2016-06-01

    To study the anticoccidial effect of Piper sarmentosum extracts (PSE) in experimental broiler coccidiosis, 270 one-day-old Wenchang broiler chickens were randomly assigned to six groups, each with three replicates (n = 15). The six groups were blank control group (BC), negative control group (NC), positive control group (PC), and another three PSE addition groups. Chickens in three control groups were fed a basal diet without PSE supplementation. Chickens in the three PSE addition groups were fed a basal diet supplemented with PSE at 100 (T100), 200 (T200), and 300 (T300) mg/kg of feed, respectively. At 15 days of age, chickens in group NC, PC, and three PSE addition groups were challenged with an oral dose of 1 × 10(5) Eimeria tenella oocysts each chick. Chickens in group PC were fed with diclazuril solution in water for 5 days after 48 h with oocysts inoculation. The results showed that PSE and diclazuril improved growth performance and significantly (P coccidiosis.

  16. [Experimental study of allogenic tendon with sheath grafting in chicken].

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    Zhang, Y L; Wang, S L; Gao, X S

    2001-03-01

    To investigate availability of deep freeze stored allogenic tendon with sheath grafting in repairing the tendon and sheath defect in the II area of flexor digitorum tendon. Sixty chickens with tendon and sheath defect were divided into 2 groups randomly, group A was treated with allogenic grafting and group B was treated with autogenic grafting, these two groups were divided into two subgroups respectively, they were, group A1 allogenic tendon with whole sheath grafting, group A2 allogenic tendon with partial sheath grafting, group B1 autogenic tendon with whole sheath grafting and group B2 autogenic tendon with whole sheath grafting. All the allogenic grafts were treated by deep freeze. Histomorphological study, histoimmunological study and slipping function of the grafts were measured after operation. In group A1 and B1, the local reaction was sever, the nutrition of tendon graft was barricaded by the whole sheath resulting in adhesion, degeneration and necrosis. In group A2 and B2, the tendon graft healed well and little adhesion existed between tendon and sheath. The results showed that there were significant differences between tendon grafting with whole sheath and tendon grafting with partial sheath. Deep freeze store can reduce the immunogenicity of allogenic tendon with sheath. Allogenic tendon with partial sheath grafting can be used as a new biological material for repairing the tendon and sheath defect.

  17. Eimeria tenella oocyst shedding and output in cecal or fecal contents following experimental challenge in broilers.

    Science.gov (United States)

    Jordan, A; Caldwell, D J; Klein, J; Coppedge, J; Pohl, S; Fitz-Coy, S; Lee, J T

    2011-05-01

    Two experiments were conducted to determine whether Eimeria tenella oocyst output in cecal and fecal contents, lesion development, and performance characteristics were affected by ad libitum versus restricted feeding and challenge level. In experiment 1, 144 Cobb 500 males were placed in battery cages with 6 chicks/pen. On d 20, half of the battery pens were placed on feed restriction and all broilers were orally challenged with Eimeria tenella oocysts at one of 3 challenge levels (0, 5,000, or 20,000 sporulated oocysts). Cecal and fecal material were collected separately from d 4 postchallenge through d 10 postchallenge for oocysts output (oocysts shed/g) determination. Six days postchallenge, 3 broilers from each pen were removed and subjected to necropsy for lesion assessment. In experiment 2, 96 Cobb 500 males were placed in identical battery pens with 8 chicks/pen. On d 14, restricted feeding was initiated and broilers were challenged with Eimeria tenella oocysts at one of 3 challenge levels (1,000, 5,000, or 20,000 oocysts). Twenty-four hour collections of cecal and fecal material were obtained separately from d 4 postchallenge through d 10 postchallenge for oocysts per gram and total output determination. Six days postchallenge, 4 broilers from each pen were removed and subjected to necropsy for lesion assessment. In both experiments, BW gain was not affected by challenge dose in either the ad libitum-fed or restrict-fed broilers. Increased lesion development was observed with increasing challenge levels, and oocyst shedding peaked between d 7 and 9 postchallenge in both experiments. Oocyst concentration was higher in cecal droppings compared with fecal material throughout peak shedding; however, total oocyst output for the challenge period was similar between fecal material and cecal droppings.

  18. Cardiorespiratory effects of venous lipid micro embolization in an experimental model of mediastinal shed blood reinfusion

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    Dencker Magnus

    2009-09-01

    Full Text Available Abstract Background Retransfusion of the patient's own blood during surgery is used to reduce the need for allogenic blood transfusion. It has however been found that this blood contains lipid particles, which form emboli in different organs if the blood is retransfused on the arterial side. In this study, we tested whether retransfusion of blood containing lipid micro-particles on the venous side in a porcine model will give hemodynamic effects. Methods Seven adult pigs were used. A shed blood surrogate containing 400 ml diluted blood and 5 ml radioactive triolein was produced to generate a lipid embolic load. The shed blood surrogate was rapidly ( Results A more than 30-fold increase in pulmonary vascular resistance was observed, with subsequent increase in pulmonary artery pressure, and decrease in cardiac output and arterial pressure. This response was transient, but was followed by a smaller, persistent increase in pulmonary vascular resistance. Only a small portion of the infused triolein passed the lungs, and only a small fraction could be recirculated by increasing cardiac output and pulmonary pressure. Conclusion Infusion of blood containing lipid micro-emboli on the venous side leads to acute, severe hemodynamic responses that can be life threatening. Lipid particles will be trapped in the lungs, leading to persistent effects on the pulmonary vascular resistance.

  19. Chicken Chicken

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    Sandra Sirangelo Maggio

    2008-04-01

    Full Text Available Chicken consists of a collection of 38 gay poems written and illustrated by Seattle poet Dennis Kelly. Several kinds of gay poems are introduced here, all centered on the theme of young gay love. The author has already published Gay Sunshine & Fag Rag, and is working on a long gay epic called Cantos Northwest, whose ten first poems can also be found in Chicken. Kelly's language is simple and spontaneous, full of slang and word-games [which can be found in "Graphemics", where the real chicken is "awakened by the difference between syntax and semen/antics". Chicken consists of a collection of 38 gay poems written and illustrated by Seattle poet Dennis Kelly. Several kinds of gay poems are introduced here, all centered on the theme of young gay love. The author has already published Gay Sunshine & Fag Rag, and is working on a long gay epic called Cantos Northwest, whose ten first poems can also be found in Chicken. Kelly's language is simple and spontaneous, full of slang and word-games [which can be found in "Graphemics", where the real chicken is "awakened by the difference between syntax and semen/antics".

  20. Capripoxvirus tissue tropism and shedding: A quantitative study in experimentally infected sheep and goats.

    Science.gov (United States)

    Bowden, Timothy R; Babiuk, Shawn L; Parkyn, Geoff R; Copps, John S; Boyle, David B

    2008-02-20

    Sheeppox virus and goatpox virus cause systemic disease in sheep and goats that is often associated with high morbidity and high mortality. To increase understanding of the pathogenesis of these diseases, we undertook quantitative time-course studies in sheep and goats following intradermal inoculation of Nigerian sheeppox virus or Indian goatpox virus in their respective homologous hosts. Viremia, determined by virus isolation and real-time PCR, cleared within 2 to 3 weeks post inoculation. Peak shedding of viral DNA and infectious virus in nasal, conjunctival and oral secretions occurred between 10 and 14 days post inoculation, and persisted at low levels for up to an additional 3 to 6 weeks. Although gross lesions developed in multiple organ systems, highest viral titers were detected in skin and in discrete sites within oronasal tissues and gastrointestinal tract. The temporal distribution of infectious virus and viral DNA in tissues suggests an underlying pathogenesis that is similar to smallpox and monkeypox where greatest viral replication occurs in the skin. Our data demonstrate that capripoxvirus infections in sheep and goats provide additional and convenient models which are suitable not only for evaluation of poxvirus-specific vaccine concepts and therapeutics, but also study of poxvirus-host interactions.

  1. Induced expression of the antimicrobial peptide melittin inhibits experimental infection by Mycoplasma gallisepticum in chickens.

    Science.gov (United States)

    Lazarev, Vassili N; Stipkovits, Laszlo; Biro, Judit; Miklodi, Dora; Shkarupeta, Marina M; Titova, Galina A; Akopian, Tatiana A; Govorun, Vadim M

    2004-05-01

    The in vivo action of the antimicrobial peptide melittin, expressed from a recombinant plasmid vector, on chickens experimentally infected with Mycoplasma gallisepticum was studied. The plasmid vector pBI/mel2/rtTA includes the melittin gene under the control of an inducible tetracycline-dependent human cytomegalovirus promoter and the gene coding for the trans-activation protein rtTA. Aerosol administration of the vector, followed by infecting the chickens with M. gallisepticum 1226, is shown to inhibit development of infection. The inhibitory action was confirmed by a complex of clinical, pathomorphological, histological and serological studies, and also by comparing the M. gallisepticum reisolation frequency from the respiratory tract and internal organs. The data suggest that plasmid vectors expressing genes of antimicrobial peptides can be considered as potential agents for the prevention and treatment of mycoplasma infections in poultry farming.

  2. Chicken line-dependent mortality after experimental infection with three type IIxIII recombinant Toxoplasma gondii clones.

    Science.gov (United States)

    Schares, G; Herrmann, D C; Maksimov, P; Matzkeit, B; Conraths, F J; Moré, G; Preisinger, R; Weigend, S

    2017-09-01

    Three genetically different clones of Toxoplasma gondii, also different in mouse virulence, were studied by experimental infection in chickens. For the experiments, four chicken lines were used, which differed in phylogenetic origin and performance level: two white egg layer lines, one with high laying performance (WLA), one with low (R11) and two brown layer lines, also displaying high (BLA) and low (L68) egg number. Chickens were intraperitoneally infected with three different T. gondii isolates representing type IIxIII recombinant clones, i.e. showing both, type II- and type III-specific alleles. These clones (K119/2 2C10, B136/1 B6H6, K119/2 A7) had exhibited virulence differences in a mouse model. In chickens, a significantly higher mortality was observed in white layer lines, but not in brown layer lines, suggesting that differences in the phylogenetic background may influence the susceptibility of chickens for toxoplasmosis. In addition, antibody (IgY) levels varied in surviving chickens at 31 days post infection. While low to intermediate antibody levels were observed in white layers, intermediate to high levels were measured in brown layers. Infection with a T. gondii clone showing low chicken virulence resulted in higher antibody levels in all chicken lines compared to infection with T. gondii clones of intermediate or high chicken virulence. This was in agreement with the parasite load as determined by real-time PCR. Overall, results show that progeny resulting from natural sexual recombination of T. gondii clonal lineages, may differ in their virulence for mice and chickens. Copyright © 2016 Elsevier Inc. All rights reserved.

  3. Diurnal fluctuations in nematode egg excretion in naturally and in experimentally infected chickens.

    Science.gov (United States)

    Wongrak, Kalyakorn; Gauly, Matthias; Daş, Gürbüz

    2015-03-15

    We investigated whether nematode egg excretion through feces of naturally or experimentally infected chickens follow certain patterns within a day, which may allow determining the most appropriate sampling time for the highest parasite egg concentration. Feces samples (n=864) from chickens (n=36) with naturally occurring mixed nematode infections (trials N1, N2) or with an experimental Ascaridia galli infection (E) were collected quantitatively every 4h for four consecutive days. Number of eggs per gram of feces (EPG) was determined, and accumulative egg output (AEO) at each sampling time as well as total number of eggs excreted within 24h (eggs per day, EPD) were then estimated. At the end of the collection period, the hens were necropsied and their worm burdens determined. Naturally infected hens harbored Heterakis gallinarum (100%), Capillaria spp. (95.7%) and A. galli (91.3%). The experimental A. galli infection produced patent infections in all the birds. In general, both fecal egg concentration (EPG) and the amount of feces increased (P0.05) between effects of sampling hours and days on EPG and AEO, suggesting the existence of repeatable diurnal fluctuations within each day. Although an association between climatic parameters (e.g., ambient temperature and relative humidity) and the nematode egg excretion was quantified, a causal relationship could not be demonstrated. We conclude that nematode egg excretion through chicken feces in both natural and experimental infections shows repeatable diurnal fluctuations, which may indicate adaptive strategies by nematodes and eventually favor parasite spread. Since analytic sensitivity of fecal egg counts suffers from low egg concentrations in feces, samples taken during the daytime have a higher diagnostic value. Copyright © 2015 Elsevier B.V. All rights reserved.

  4. Neospora caninum infection in birds: experimental infections in chicken and embryonated eggs.

    Science.gov (United States)

    Furuta, P I; Mineo, T W P; Carrasco, A O T; Godoy, G S; Pinto, A A; Machado, R Z

    2007-12-01

    Neospora caninum causes economical impact in cattle-raising farms since it is implicated as the major cause of bovine abortions. Although infection by the parasite has been widely described in mammals, the role of birds in its life-cycle is still obscure. Therefore, this work aimed to evaluate the infection by N. caninum in different chicken models. Experimental infections were conducted in 7-day-old chicks, laying hens and embryonated eggs, where samples were analysed for parasite burden, IgG antibodies and lesions promoted. Chickens demonstrated an asymptomatic infection, although with seroconversion and systemic replication of the parasite. In laying hens, no signs of vertical transmission were observed. However, embryonated eggs inoculated by the allantoic cavity route demonstrated susceptibility to infection, with mortality rates around 50% independent of the inoculum dose. Additionally, dogs became infected after ingestion of different amounts of inoculated eggs, producing either oocysts or specific IgG antibodies. The results herein presented demonstrate that chickens may be intermediate hosts of N. caninum and that embryonated eggs could be a useful model to study the parasite's biology.

  5. Plasma and tissue pharmacokinetics of marbofloxacin in experimentally infected chickens with Mycoplasma gallisepticum and Escherichia coli.

    Science.gov (United States)

    Ding, H; Wang, L; Shen, X; Gu, X; Zeng, D; Zeng, Z

    2013-10-01

    The plasma and tissue pharmacokinetics of marbofloxacin in chickens experimentally infected with Mycoplasma gallisepticum and Escherichia coli were studied. Marbofloxacin was given to 66 infected chickens by oral administration at a dosage of 5 mg/kg b.w., once a day for three days. Plasma, brain, kidney, liver, lung, muscle and trachea were collected and marbofloxacin concentrations were analyzed by a high performance liquid chromatography method. In the infected chickens, maximal marbofloxacin concentrations in plasma, brain, kidney, liver, lung, muscle and trachea were 1.84, 1.33, 7.35, 5.61, 3.12, 2.98, and 4.51 g/mL (g); the elimination half-lives of marbofloxacin were 6.8, 2.74, 9.31, 8.45, 9.55, 11.53 and 5.46 h for plasma, brain, kidney, liver, lung, muscle and trachea, respectively. AUC were calculated to be 9.68, 8.04, 45.1, 27.03, 20.56, 19.47, and 32.68 μg/mL (g) for plasma, brain, kidney, liver, lung, muscle and trachea, respectively. Marbofloxacin concentration in tissues except for brain exceeded marbofloxacin concentration in plasma, with AUC(tissue) /AUC(plasma) ranging from 2.01 to 4.66 and Peak(tissue) /Peak(plasma) ranging from 1.62 to 3.99. The results showed that a marbofloxacin dosage of 5 mg/kg administered orally at 24 h intervals may provide successful treatment of chicken with MG and E. coli infection. © 2013 John Wiley & Sons Ltd.

  6. EXPERIMENTAL STUDY OF CENTRIFUGAL HUMIDIFIER FITTED IN AN INDUSTRIAL SHED LOCATED IN TROPICAL CLIMATES

    Directory of Open Access Journals (Sweden)

    K SENTHILKUMAR

    2011-01-01

    Full Text Available An evaporative cooling system based on centrifugal humidification technique is proposed for large industrial spaces. In this system, the evaporation rate is improved by splitting the water into fine micronisers by impinging it onto the stationery strips. The various parameters influencing the rate of evaporation are identified. The effect of mass flow rate of water, disc speed and mass flow rate of air on space cooling and humidifier efficiency is studied experimentally and plotted with respect to time. The studies indicate that medium mass flow rate of water, higher disc speed and medium mass flow rate of air are preferable in reducing the dry bulb temperature of room and for increasing humidifier efficiency.

  7. Experimental Hendra virus infection of dogs: virus replication, shedding and potential for transmission.

    Science.gov (United States)

    Middleton, D J; Riddell, S; Klein, R; Arkinstall, R; Haining, J; Frazer, L; Mottley, C; Evans, R; Johnson, D; Pallister, J

    2017-01-01

    Characterisation of experimental Hendra virus (HeV) infection in dogs and assessment of associated transmission risk. Beagle dogs were exposed oronasally to Hendra virus/Australia/Horse/2008/Redlands or to blood collected from HeV-infected ferrets. Ferrets were exposed to oral fluids collected from dogs after canine exposure to HeV. Observations made and samples tested post-exposure were used to assess the clinical course and replication sites of HeV in dogs, the infectivity for ferrets of canine oral fluids and features of HeV infection in dogs following contact with infective blood. Dogs were reliably infected with HeV and were generally asymptomatic. HeV was re-isolated from the oral cavity and virus clearance was associated with development of virus neutralising antibody. Major sites of HeV replication in dogs were the tonsils, lower respiratory tract and associated lymph nodes. Virus replication was documented in canine kidney and spleen, confirming a viraemic phase for canine HeV infection and suggesting that urine may be a source of infectious virus. Infection was transmitted to ferrets via canine oral secretions, with copy numbers for the HeV N gene in canine oral swabs comparable to those reported for nasal swabs of experimentally infected horses. HeV is not highly pathogenic for dogs, but their oral secretions pose a potential transmission risk to people. The time-window for transmission risk is circumscribed and corresponds to the period of acute infection before establishment of an adaptive immune response. The likelihood of central nervous system involvement in canine HeV infection is unclear, as is any long-term consequence. © 2017 Australian Veterinary Association.

  8. Experimental reproduction of endocarditis with Pasteurella gallinarum in mature leghorn chickens.

    Science.gov (United States)

    Tjahjowati, G; Orr, J P; Chirino-Trejo, M; Mills, J H

    1995-01-01

    The pathogenicity of Pasteurella gallinarum for mature leghorn chickens was investigated by inoculating thirty 52-week-old chickens intravenously with live P. gallinarum. Each chicken was inoculated once daily for 5 days at one of three different dosage levels with either the type strain ATCC 13361 or a field isolate from a chicken with endocarditis. Chickens were necropsied after death or euthanasia. Valvular endocarditis was present in seven chickens given the field isolate and five chickens given the type strain. Other lesions detected were myocarditis, hepatic and splenic infarcts, nephritis, pneumonia, and encephalitis. At necropsy, P. gallinarum was reisolated from hearts, livers, spleens, lungs, kidneys, and blood. Controls injected with sterile broth had no lesions of endocarditis, nor was P. gallinarum isolated from them. The results confirm the pathogenicity of P. gallinarum for the heart valves of mature chickens.

  9. Experimental challenge of chicken vaccinated with commercially available H5 vaccines reveals loss of protection to some highly pathogenic avian influenza H5N1 strains circulating in Hong Kong/China.

    Science.gov (United States)

    Connie Leung, Y H; Luk, Geraldine; Sia, Sin-Fun; Wu, Yu-On; Ho, Chuk-Kwan; Chow, Kai-Chi; Tang, Shing-Chun; Guan, Yi; Malik Peiris, J S

    2013-08-02

    Highly pathogenic avian influenza (HPAI) H5N1 virus continues to circulate in poultry in Asia and Africa posing a threat to both public and animal health. Vaccination, used as an adjunct to improved bio-security and stamping-out policies, contributed to protecting poultry in Hong Kong from HPAI H5N1 infection in 2004-2008 although the virus was repeatedly detected in dead wild birds. The detection of clade 2.3.4 H5N1 viruses in poultry markets and a farm in Hong Kong in 2008 raised the question whether this virus has changed to evade protection from the H5 vaccines in use. We tested the efficacy of three commercial vaccines (Nobilis, Poulvac and Harbin Re-5 vaccine) in specific pathogen free white leghorn chickens against a challenge with A/chicken/Hong Kong/8825-2/2008 (clade 2.3.4) isolated from vaccinated poultry in Hong Kong and A/chicken/Hong Kong/782/2009 (clade 2.3.2). Harbin Re5 vaccine provided the best, albeit not complete protection against challenge with the clade 2.3.4 virus. All three vaccines provided good protection from death and significantly reduced virus shedding following challenge with the clade 2.3.2 virus. Only Harbin Re-5 was able to completely protect chickens from virus shedding as well as mortality. Sera from vaccinated chickens had lower geometric hemagglutination inhibition titers against A/chicken/Hong Kong/8825-2/08, as compared to two other clade 2.3.4 and one clade 0 virus. Alignment of amino-acid sequences of the haemagglutinin of A/chicken/Hong Kong/8825-2/08 and the other H5 viruses revealed several mutations in positions including 69, 71, 83, 95, 133,140, 162, 183, 189, 194 and 270 (H5 numbering) which may correlate with loss of vaccine protection. Our results indicated that the tested HPAI H5N1 (2.3.4) virus has undergone antigenic changes that allow it to evade immunity from poultry vaccines. This highlights the need for continued surveillance and monitoring of vaccine induced immunity, with experimental vaccine challenge

  10. Effect of the granulometric characteristics of monensin sodium on controlling experimental coccidiosis in broiler chickens.

    Science.gov (United States)

    Rambozzi, Luisa; Renna, Manuela; Cornale, Paolo; Perona, Giovanni; Malfatto, Vanda; Mimosi, Antonio

    2012-01-01

    The aim of the present study was to investigate the efficacy of monensin sodium grain size on controlling coccidiosis in broiler chickens. Three hundred and fifty Cobb 700 chicks were infected experimentally with 8 × 10(4) sporulated oocysts of Eimeria spp. The birds were fed with diets supplemented with powdered (n = 150) or granulated (n = 150) monensin, with particle sizes of ≤ 100 µm and 450-650 µm, respectively. The remaining chicks (n = 50) were used as an unmedicated control group. The birds' weights and number of oocysts per gram of litter in each group were recorded weekly. A total of 96 birds were randomly selected and culled during the trial. Their intestinal oocyst counts and lesion scores were determined. No significant differences in body weights were found between the groups at the end of the study. The percentages of infected animals, oocyst counts and lesion scores were significantly higher in the control group than in the other two groups; the two treated groups did not show any appreciable differences to each other. Enteritis was observed in 14 birds, all in the group supplemented with granulated monensin. These results suggest that powdered and granulated monensin have comparable efficacy in controlling coccidiosis in broiler chickens. However, treatments with monensin sodium of high grain size may be subject to contraindications relating to enteritis.

  11. Lack of effect of feeding lactoferrin on intestinal populations and fecal shedding of Salmonella typhimurium in experimentally-infected weaned pigs

    Science.gov (United States)

    Two experiments were conducted to evaluate the effect of the iron-binding molecule lactoferrin on reducing gut populations and fecal shedding of Salmonella typhimurium in experimentally infected weaned pigs. For each experiment, crossbred barrows and gilts were purchased locally and transported to ...

  12. Isolation of Pasteurella multocida from chickens, preparation of formalin killed fowl cholera vaccine, and determination of efficacy in experimental chickens

    Directory of Open Access Journals (Sweden)

    Mahmuda Akhtar

    2016-03-01

    Full Text Available Objectives: The objectives of this study were to isolate and identify Pasteurella multocida from fowl cholera (FC suspected chicken, and to prepare and efficacy determination of formalin killed fowl cholera vaccine using the isolated P. multocida strain. Materials and methods: A total of five suspected dead chickens were collected from Brothers Poultry Farm located at Gazipur district, Bangladesh. The samples were processed and the P. multocida was isolated through conventional bacteriological techniques, were finally confirmed by polymerase chain reaction using P. multocida specific primers targeting cap gene. The P. multocida isolate was used to develop a formalin killed fowl cholera vaccine. The efficacy of the newly prepared vaccine was determined in Starcross-579 chickens (n=30 aging 15 weeks either by injecting 1 mL (group-A; n=10 or 0.5 mL (group-B; n=10 vaccine containing approximately 3.2x108 CFU/mL P. multocida organism; 10 birds were kept as unvaccinated control. The sera from the vaccinated and control birds were collected and were subjected for antibody titre determination by enzyme-linked immunosorbent assay (ELISA. Finally the vaccinated birds were challenged using virulent strains of P. multocida to confer the protection against FC. Results: P. multocida could be isolated from both the samples. The formalin killed vaccine prepared from the isolated bacteria was subjected for the determination of antibody titre in chicken, and found that the antibody titres in the birds of group A and group B were 4.513 and 4.07 respectively after primary vaccination, and 4.893 and 4.37 respectively after booster vaccination. Most of the vaccinated birds were found to be survived after challenging with virulent strain of P. multocida. Conclusion: It is concluded that the causal agent of FC (P. multocida was successfully isolated from FC affected dead chickens. The prepared formalin killed fowl cholera vaccine induces protective immune response and

  13. Infectious bursal disease virus: case report and experimental studies in vaccinated and unvaccinated SPF chickens and commercial broiler chicks

    Directory of Open Access Journals (Sweden)

    H Scanavini Neto

    2004-03-01

    Full Text Available IBDV Gm 11 (Simbios eleven-molecular group has been detected since 1997 in many farms of commercial broilers and layers causing high mortality (2 to 15% and severe macro and microscopic damage in cloacal bursae, spleen, thymus, kidney and liver. Five serial passages of 2050/97-Gm 11 IBDV sample by CAM route in SPF chicken's embryonated eggs did not elicit increased embryo mortality. High mortality (100% of 21 day-old SPF leghorn chickens and severe bursal and splenic lesions were seen from 24 up to 48 hours after eye-drop inoculation of 2050/97 strain (50 mL of 10-2 dilution of 10% bursae homogenate. Mortality was not detected when vaccinated SPF and broiler chickens were inoculated. One dead bird was found among ten challenged unvaccinated broilers. Variations in the intensity of cloacal bursae injury and spleen response were found between unvaccinated and vaccinated broiler chickens. IBDV antibodies were detected by ELISA test in almost all vaccinated SPF chickens before challenge while low number of commercial vaccinated and unvaccinated broilers were serologically positive (0 to 3 birds in 18. Increasing IBDV antibody titers were detected after challenge with 2050/97 strain and highest GMTs were found in broilers. It was concluded that 2050/97 strain is a highly virulent IBDV and SPF leghorn chickens immunized with BV8 intermediate vaccine strain were resistant to the challenge. Increasing susceptibility was found from experimental groups of unvaccinated broilers to vaccinated broilers and to unvaccinated SPF birds. It is discussed that passive immunity was involved in the rate of protection of challenged unvaccinated broiler and in the immune response impairment after vaccination of broilers chicks. The use of a constant virus suspension with known potency to challenge the experimental birds was suitable to evaluate vaccination efficacy. Evaluation of bursal and splenic responses at early and delayed time after challenge were useful to

  14. Observations on Arthritis in Broiler Breeder Chickens Experimentally Infected with Staphylococcus aureus

    Directory of Open Access Journals (Sweden)

    Chang-Qin Gu§, Xue-Ying Hu§, Chang-Qing Xie1, Wan-Po Zhang, De-Hai Wang, Quan Zhou and Guo-Fu Cheng1*

    2013-04-01

    Full Text Available Staphylococcus aureus is the most common cause of bacterial arthritis in broiler breeder chickens. In this study, we established a model of broiler breeder chicken arthritis inoculated with Staph. aureus isolated from a spontaneously occurring bacterial arthritis in chickens. We evaluated the model by bacteriology, serology, pathology, and immunology. The results showed that 2.5 × 109 cfu Staph. aureus injected into the right joint cavity can successfully induce a chicken arthritis model. The majority of the infected chickens suffered lameness and joint swelling at 3 days post-inoculation (DPI. The death peak time was on 7 DPI and the mortality rate was 51.1%. Staph. aureus can be continuously isolated from the blood and left joint synovial fluid of the infected chickens. Lesions found on the infected chickens consisted of swollen joints full of caseous exudates, cartilage injury, and synovial membrane thickening with infiltration of inflammatory cells. The center of the lesion contained many round bacterial cocci. With joint injury aggravation, intra-articular hyaluronic acid gradually decreased, and serum interleukin-6 became significantly higher compared with the control (P<0.01 from 3 DPI. The results indicated that the chicken models of Staph. aureus-mediated arthritis were successful, and can be used to gain a better understanding of the host-bacterium relationship.

  15. Immune gene expression in the spleen of chickens experimentally infected with Ascaridia galli

    DEFF Research Database (Denmark)

    Dalgaard, Tina S.; Skovgaard, Kerstin; Norup, Liselotte R.

    2015-01-01

    and reagent consumption. Spleenic transcription of immunological genes was compared between infected chickens and non-infected controls at week 2, 6, and 9 p.i. corresponding to different stages of parasite development/maturation. At week 2 p.i. increased expression of IL-13 was observed in infected chickens...

  16. Colonisation and shedding of Lawsonia intracellularis in experimentally inoculated rodents and in wild rodents on pig farms.

    Science.gov (United States)

    Collins, A M; Fell, S; Pearson, H; Toribio, J-A

    2011-06-02

    Lawsonia intracellularis is an intracellular bacterium causing proliferative enteropathy in various animal species, and is considered an economically important pathogen of pigs. Rats and mice have been implicated as external vectors for a wide range of pig pathogens, including L. intracellularis. Previous studies have demonstrated L. intracellularis infection and proliferative enteropathy in rodents, but did not show the duration of shedding or the number of L. intracellularis shed by infected rodents, and therefore the infection risk that rodents pose to pigs. In this study, the number of L. intracellularis shed in the faeces and intestinal mucosa of wild rats trapped on pig farms was determined by a quantitative real time polymerase chain reaction assay. The prevalence of L. intracellularis in wild rats trapped on pig farms with endemic proliferative enteropathy (PE) was very high (≥ 70.6%), and large numbers of L. intracellularis were shed (10(10)/g of faeces) in a small proportion of wild rats. The duration of colonisation in laboratory rats and mice challenged with porcine isolates of L. intracellularis was also shown. Faecal shedding of L. intracellularis persisted for 14-21 days in rats and mice that were mildly affected with histological lesions of PE. The humoral immune response to L. intracellularis persisted for 40 days in both species. This study demonstrates that rodents may be an important reservoir of L. intracellularis on piggeries, and hence rodent control is important in disease eradication programs on pig farms. Crown Copyright © 2011. Published by Elsevier B.V. All rights reserved.

  17. Experimental induction of necrotic enteritis in chickens by a netB-positive Japanese isolate of Clostridium perfringens.

    Science.gov (United States)

    To, Ho; Suzuki, Takayuki; Kawahara, Fumiya; Uetsuka, Koji; Nagai, Shinya; Nunoya, Tetsuo

    2017-02-28

    Necrotic enteritis (NE) is one of the most important bacterial diseases in terms of economic losses. Clostridium perfringens necrotic enteritis toxin B, NetB, was recently proposed as a new key virulent factor for the development of NE. The goal of this work was to develop a necrotic enteritis model in chickens by using a Japanese isolate of C. perfringens. The Japanese isolate has been found to contain netB gene, which had the same nucleotide and deduced amino acid sequences as those of prototype gene characterized in Australian strain EHE-NE18, and also expressed in vitro a 33-kDa protein identified as NetB toxin by nano-scale liquid chromatographic tandem mass spectrometry. In the challenge experiment, broiler chickens fed a commercial chicken starter diet for 14 days post-hatch were changed to a high protein feed mixed 50:50 with fishmeal for 6 days. At day 21 of age, feed was withheld for 24 hr, and each chicken was orally challenged twice daily with 2 ml each of C. perfringens culture (10 9 to 10 10 CFU) on 5 consecutive days. The gross necrotic lesions were observed in 90 and 12.5% of challenged and control chickens, respectively. To our knowledge, this is the first study that demonstrated that a netB-positive Japanese isolate of C. perfringens is able to induce the clinical signs and lesions characteristic of NE in the experimental model, which may be useful for evaluating the pathogenicity of field isolates, the efficacy of a vaccine or a specific drug against NE.

  18. Frequency and Duration of Fecal Shedding of Salmonella Serovars Heidelberg and Typhimurium by Experimentally Infected Laying Hens Housed in Enriched Colony Cages at Different Stocking Densities.

    Science.gov (United States)

    Gast, Richard K; Guraya, Rupa; Jones, Deana R; Guard, Jean; Anderson, Kenneth E; Karcher, Darrin M

    2017-09-01

    Eggs contaminated with Salmonella Enteritidis are leading sources of human salmonellosis, but Salmonella Heidelberg and Salmonella Typhimurium are also egg-associated pathogens. The management practices and housing facilities characterizing different systems for housing commercial egg flocks can influence Salmonella persistence and transmission. Animal welfare aspects of poultry housing have been widely debated, but their food safety ramifications are not thoroughly understood. The present study assessed the effects of two different bird stocking densities on the frequency and duration of fecal shedding of strains of Salmonella Heidelberg and Salmonella Typhimurium in groups of experimentally infected laying hens housed in colony cages enriched with perching and nesting areas. In separate trials, laying hens were distributed into two groups housed in enriched colony cages at stocking densities of 648 and 973 cm(2)/bird, and a third group was housed in conventional cages at 648 cm(2)/bird. All hens were orally inoculated with doses of 10(8) colony-forming units (CFU) of either Salmonella Heidelberg or Salmonella Typhimurium. At eight weekly postinoculation intervals, samples of voided feces were collected from beneath each cage and cultured to detect Salmonella. Fecal shedding of Salmonella Heidelberg continued for 8 wk in all housing groups, but Salmonella Typhimurium shedding ceased after as little as 5 wk in enriched colony cages at low stocking density. After Salmonella Heidelberg infection, the overall frequency of positive fecal cultures for all sampling dates combined was significantly (P < 0.05) greater from either conventional cages (51.0%) or enriched colony cages (46.5%) at high stocking density than from enriched colony cages at low stocking density (33.3%). No significant differences in Salmonella Typhimurium fecal isolation were identified between housing groups. These results demonstrate that stocking density can affect intestinal colonization and

  19. Biochemical studies in experimentally Escherichia coli infected broiler chicken supplemented with neem (Azadirachta indica leaf extract

    Directory of Open Access Journals (Sweden)

    Vikash Sharma

    2015-11-01

    Full Text Available Aim: An experimental study was conducted on 192-day-old broiler chicks for evaluating the effect of 10% neem leaf extract (NLE supplementationon biochemical parameters in chickens experimentally infected with Escherichia coli O78 at 107 CFU/0.5 ml at 7 days of age. Materials and Methods: The 192-day-old broiler chicks were procured. These chicks were divided into two groups (A and B containing 96 birds each on the 1st day. Diet of all the chicks of Group A was supplemented with 10%NLE in water, whereas chicks of Group B were given feed and water devoid of NLE supplementation throughout the experiment. After rearing for 1 week, chicks of both the groups (A and B were again divided into two subgroups (Group A into A1 and A2 and Group B into B1 and B2 of 54 and 42 birds, respectively. At the age of 7 days all the chicks of groups A1 and B1 were injected with E. coli O78 at 107 CFU/0.5 ml intraperitoneally. Blood samples were collected from six chicks from each group at day 0, 2, 4, 7, 14, 21, 28 days post-infection and serum was separated for biochemical studies. Results: There was a significant increase in serum alanine transaminase (ALT, aspartate transaminase (AST, lactate dehydrogenase (LDH activities, globulin concentration and a decrease in total protein (TP, albumin concentrations, and alkaline phosphatase (ALP activity in both the infected groups. However, the changes in biochemical values, i.e., ALT, AST, LDH, ALP, TP, albumin, and globulin wereof lower magnitude in NLE supplemented group suggesting hepatoprotective and cardioprotective effect of NLE. Conclusions: Fromthe present study, it is reasonable to conclude that significant increase in the value of ALT, AST, LDH, globulin, and significant decrease in the value of ALP, TP, and albumin was of lower magnitude in supplemented infected group (A1 as compared to non-supplemented infected group (B1 suggesting hepatoprotective and cardioprotective effect of NLE.

  20. Experimental Investigation of Biogas Production from Kitchen Waste Mixed with Chicken Manure

    OpenAIRE

    H. Mousa; A. Obaidat; H.B. Khaled; A. Alawaneh; A. Tarawneh

    2016-01-01

    ogas produced from solid kitchen waste (KW) mixed with chicken manure (M) at different mass ratios was investigated. The effect of the ratio of the amount of water to the mixed solid waste on the amount of biogas produced was studied. The results showed that at a fixed ratio of water-to-solid waste, the amount of biogas increased as the amount of chicken M increased. At a fixed M-to-KW ratio, the amount of biogas produced increased as the solid content increased and then decreased, reaching i...

  1. Intestinal colonization of broiler chickens by Campylobacter spp. in an experimental infection study

    DEFF Research Database (Denmark)

    Bahrndorff, Simon; Garcia Clavero, Ana Belén; Vigre, Håkan

    2015-01-01

    was attributed to broiler chickens and a minor part to isolators, whereas infection trials did not affect the total variance. The results showed that pooled samples within isolators had lower c.f.u./g compared to the arithmetic mean of the individual samples. There was a significant correlation between faecal c...... infection trials, using four isolators during each infection trial to evaluate colonization of individual broiler chickens by Campylobacter jejuni over time. Individual and pooled faecal samples were obtained at days 4, 7 and 12 post-inoculation (p.i.) and caecal samples at day 12 p.i. There were large...

  2. Survival of Highly Pathogenic Avian Influenza H5N1 Virus in Tissues Derived from Experimentally Infected Chickens.

    Science.gov (United States)

    Yamamoto, Yu; Nakamura, Kikuyasu; Mase, Masaji

    2017-08-15

    Eurasian lineage highly pathogenic avian influenza (HPAI) H5N1 virus has been a severe threat to the poultry industry since its emergence in 1996. The carcass or tissues derived from infected birds may present the risk of the virus spreading to humans, animals, and the surrounding environment. In this study, we investigated the survival of the virus in feather, muscle, and liver tissues collected from six chickens (Gallus gallus) experimentally infected with HPAI H5N1 virus. The tissues were stored at +4°C or +20°C, and viral isolation was performed at different times for 360 days. The maximum periods for viral survival were observed in samples stored at +4°C in all tissue types and were 240 days in feather tissues, 160 days in muscle, and 20 days in liver. The viral infectivity at +20°C was maintained for a maximum of 30 days in the feather tissues, 20 days in muscle, and 3 days in liver. The viral inactivation rates partly overlapped in the feather and muscle tissues at the two temperatures. The virus was inactivated rapidly in the liver. Our experimental results indicate that the tissue type and temperature can greatly influence the survival of HPAI H5N1 virus in the tissues of infected chickens.IMPORTANCE Highly pathogenic avian influenza virus of the H5N1 subtype can cause massive losses of poultry, and people need to handle a large number of chicken carcasses contaminated with the virus at outbreak sites. This study evaluated how long the virus can keep its infectivity in the three types of tissues derived from chickens infected with the virus. Our experimental results indicate that the virus can survive in tissues for a specific period of time depending on the tissue type and temperature. Our results are valuable for better understanding of viral ecology in the environment and for reducing the risk of the virus spreading via bird tissues contaminated with the virus. Copyright © 2017 American Society for Microbiology.

  3. Mycoplasma gallisepticum: Influence of cell invasiveness on the outcome of experimental infection in chickens.

    Science.gov (United States)

    Much, Peter; Winner, Florian; Stipkovits, László; Rosengarten, Renate; Citti, Christine

    2002-11-15

    Recently we have shown that a low (R(low)) and a high laboratory passage (R(high)) of the poultry pathogen Mycoplasma gallisepticum prototype strain R differ markedly in their capability to invade non-phagocytic eukaryotic cells. In the present study the infection traits of these two mycoplasma passages were compared in an in vivo setting. After aerosol inoculation of chickens, M. gallisepticum was re-isolated from the inner organs of birds infected with R(low), whereas no mycoplasma was recovered from the inner organs of birds infected with R(high). These results indicate that the two mycoplasma populations derived from strain R differ in their capacity to cross the mucosal barrier and suggest that cell invasion may play a major role in the observed systemic spreading of M. gallisepticum in its chicken host.

  4. Experimental-confirmation and functional-annotation of predicted proteins in the chicken genome

    OpenAIRE

    McCarthy Fiona M; Buza Teresia J; Burgess Shane C

    2007-01-01

    Abstract Background The chicken genome was sequenced because of its phylogenetic position as a non-mammalian vertebrate, its use as a biomedical model especially to study embryology and development, its role as a source of human disease organisms and its importance as the major source of animal derived food protein. However, genomic sequence data is, in itself, of limited value; generally it is not equivalent to understanding biological function. The benefit of having a genome sequence is tha...

  5. Experimental infection of chicken embryos with recently described Brucella microti: Pathogenicity and pathological findings.

    Science.gov (United States)

    Wareth, Gamal; Böttcher, Denny; Melzer, Falk; Shehata, Awad Ali; Roesler, Uwe; Neubauer, Heinrich; Schoon, Heinz-Adolf

    2015-08-01

    Brucellae are facultative intracellular pathogens causing disease in a wide range of domestic and wild animals as well as in humans. Brucella (B.) microti is a recently recognized species and was isolated from common voles (Microtus arvalis), red foxes and soil in Austria and the Czech Republic. Its pathogenicity for livestock and its zoonotic potential has not been confirmed yet. In the present study 25 SPF chicken embryos were inoculated at day 11 of age with 1.6×10(3) and 1.6×10(5)B. microti by yolk sac and allantoic sac routes. Re-isolation of B. microti indicated rapid multiplication of bacteria (up to 1.7×10(12)CFU). B. microti provoked marked gross lesions, i.e. hemorrhages and necroses. All inoculated embryos were dead (100% mortality) in between 2nd and 4th day post inoculation. The predominant histopathological lesion was necroses in liver, kidneys, lungs, spleen, gastrointestinal tract, spinal meninges, yolk sac and chorioallantoic membrane. Immunohistochemical examination showed the presence of Brucella antigen in nearly all of these organs, with infection being mainly restricted to non-epithelial cells or tissues. This study provides the first results on the multiplication and pathogenicity of the mouse pathogenic B. microti in chicken embryos. These data suggest that, even though chicken are not mammals, they could provide a useful tool for understanding the pathogenesis of B. microti associated disease. Copyright © 2015 Elsevier Ltd. All rights reserved.

  6. Stereological analysis of sciatic nerve in chickens following neonatal pinealectomy: an experimental study

    Directory of Open Access Journals (Sweden)

    Sahin Bünyamin

    2010-04-01

    Full Text Available Abstract Background Although the injury to the peripheral nervous system is a common clinical problem, understanding of the role of melatonin in nerve degeneration and regeneration is incomplete. Methods The current study investigated the effects of neonatal pinealectomy on the sciatic nerve microarchitecture in the chicken. The chickens were divided into two equal groups: unpinealectomized controls and pinealectomized chickens. At the end of the study, biochemical examination of 10 sciatic nerve samples from both groups was performed and a quantitative stereological evaluation of 10 animals in each group was performed. The results were compared using Mann-Whitney test. Results In this study, the results of axon number and thickness of the myelin sheath of a nerve fiber in newly hatched pinealectomy group were higher than those in control group. Similarly, surgical pinealectomy group had significantly larger axonal cross-sectional area than the control group (p Conclusion In the light of these results from present animal study, changes in sciatic nerve morphometry may be indicative of neuroprotective feature of melatonin, but this suggestion need to be validated in the human setting.

  7. [Experimental study on avascular necrosis of femoral head in chickens induced by different glucocorticoides].

    Science.gov (United States)

    Xiao, Chun-Sheng; Lin, Na; Lin, Shi-Fu; Wan, Rong; Chen, Wei-Heng

    2010-03-01

    To study the effects of Methylprednisolone and Dexamethasone on the avascular necrosis of femoral head in chickens. Thirty-six chickens were randomly divided into 6 groups (n = 6): control group (group A), Methylprednisolone low dose group (group B), Methylprednisolone large dose group (group C), small dose Dexamethasone and horse serum group (group D), middle dose Dexamethasone and horse serum group (group E), and Dexamethasone large dose group (group F). On the 6th and 12th weeks, blood samples were obtained to determine the level of total cholesterol triglyeride (TG), high density lipoprotein (HDL) and low density lipoprotein (LDL). On the 12th week, femoral heads were taken off. Paraffin tissue sections were prepared to detect histopathologic change with hematoxylin and eosin staining. On the 6th week, compared with group A, the level of CHO increased significantly in group C and group F (P < 0.05), and TG increased in group B, C and group E, while HDL decreased in group B, C and group E. On the 12th week, the level of TG and CHO increased in group B, C, E and group F, and HDL decreased in group C, D and group E (P < 0.05). LDL was not detected in most chickens. The ratio of empty lacuna was higher in group C and group E compared with those of the control group (P < 0.05). Methylprednisolone is easier to induce osteonecrosis of femoral head than Dexamethasone. The condition of metabolic disorder in blood may be the basic pathomechanism of steroid-induced necrosis of femoral head.

  8. Experimental studies in chickens on the initial nutrition of tendon grafts.

    Science.gov (United States)

    Manske, P R; Lesker, P A; Bridwell, K

    1979-11-01

    A study of nutrition of various tendon graft preparations in adult chickens (up to 2 weeks after grafting), using tritiated proline and a trichloracetic acid extraction technique which separated the free and metabolized amino acid fractions, suggests that diffusion of nutrients is an important process in the initial nutrition of tendon grafts, that tendon grafts are metabolically active and viable structures, that adhesions which are frequently associated with tendon grafts do not appear to be essential to the nutrition of grafts, and that tendon grafts within fibrous pseudosheaths are nourished as effectively as grafts within synovial sheaths.

  9. Experimental Investigation of Biogas Production from Kitchen Waste Mixed with Chicken Manure

    Directory of Open Access Journals (Sweden)

    H. Mousa

    2016-12-01

    Full Text Available ogas produced from solid kitchen waste (KW mixed with chicken manure (M at different mass ratios was investigated. The effect of the ratio of the amount of water to the mixed solid waste on the amount of biogas produced was studied. The results showed that at a fixed ratio of water-to-solid waste, the amount of biogas increased as the amount of chicken M increased. At a fixed M-to-KW ratio, the amount of biogas produced increased as the solid content increased and then decreased, reaching its maximum value at a solid waste-to-water ratio of 1:1. The pH of the bioreactor containing the KW-M mixture dropped with time, resulting in a decrease in the amount of biogas produced. Controlling the pH value by titrating with NaOH solution improved the production of biogas. Investigating biogas produced from sludge showed that the pH of the reactor slightly decreased and then increased slightly. The results also showed that the amount of biogas produced from sludge containing 3% solid waste was larger than the amount produced from sludge containing 6% solid waste.

  10. SEQUENTIAL PATHOLOGICAL CHANGES IN TURKEYS EXPERIMENTALLY INFECTED WITH CHICKEN POX VIRUS

    Directory of Open Access Journals (Sweden)

    Muhammd Mubarak and Muhammad Mahmoud

    2000-01-01

    Full Text Available A total of 25, 4-weeks old, turkey poults were used in the present study. Birds were inoculated by chicken pox virus at the dose of 3 x l07.6/ml. Skin biopsy samples were taken sequentially from the same inoculated bird at 12 and 24 hours and at 2nd, 3rd, 4'h, 5th, 7th, l0th, 14th and 21 days post inoculation (PI. Tissue samples from upper respiratory and digestive tracts were also collected. Pox cytoplasmic inclusions (Bollinger bodies were detected between 4 and 7 days PI in epidermal the cell as well as in the follicular and sinus epithelium. Proliferative and necrobiotic epithelial changes were observed. Thereafter, pox inclusions disappeared with the appearance of vesicular, pustular and ulcerative lesions. This was accompanied by the gradual development of granulation tissue and finally scar tissue formed. Ultrastructure of the inclusion bodies and fine changes of the affected epidermal cell were illustrated.. It was concluded that the inoculated chicken pox virus is highly pathogenic for turkeys. Taking sequential biopsy samples from the same inoculated bird was found to yield more accurate follow up of the pox skin lesions.

  11. Duration of equine influenza virus shedding and infectivity in immunised horses after experimental infection with EIV A/eq2/Richmond/1/07.

    Science.gov (United States)

    Paillot, R; Prowse, L; Montesso, F; Stewart, B; Jordon, L; Newton, J R; Gilkerson, J R

    2013-09-27

    Equine influenza (EI) is a major respiratory disease of horses. Recent outbreaks of EI have demonstrated the ease with which EI virus (EIV) can be transmitted internationally. This study aimed to improve our understanding of EIV shedding after infection of vaccinated horses, which would inform possible changes to current quarantine requirements. Our objectives were to compare commonly used diagnostic tests and to evaluate the relative merits of nasal and nasopharyngeal swabs for detection of EIV in vaccinated and unvaccinated ponies following EIV infection and to use these data to inform optimal quarantine procedures for the safe international movement of horses. Five ponies vaccinated against EI were infected experimentally with A/eq/Richmond/1/07 (Florida clade 2), 11 weeks after V2. Nasal and nasopharyngeal swabs were taken daily for 14 days and every 2 days for another 2 weeks. The 5 vaccinates were introduced sequentially for 48h to 3 groups of 2 naïve sentinel ponies each on days 2, 4 and 6 post-challenge respectively. Clinical signs of disease and EIV shedding were monitored for 14 days after co-mingling. EIV was detected by 3 different methods of detection (EIV nucleoprotein ELISA, EIV nucleoprotein qRT-PCR and isolation/titration in embryonated hens' eggs). Directigen™ EZ Flu A+B tests were also performed on samples from the vaccinated ponies for 6 days after infection. Results show that nasopharyngeal swabs were superior to nasal swabs, with increased frequency and amount of virus detected. The average mean duration of shedding was 6-8 days in naïve animals. All 3 sentinel groups were infected successfully with EIV after commingling with vaccinates, indicating up to 6 days of transmission. EI protection induced by vaccination is a dynamic process, naturally fluctuating and dependent on the time since last immunisation, with periods of high immunity (peak of immunity shortly after boost immunisation) and periods of susceptibility to EIV infection. This

  12. Frequency and Duration of Fecal Shedding of Salmonella Enteritidis by Experimentally Infected Laying Hens Housed in Enriched Colony Cages at Different Stocking Densities

    Science.gov (United States)

    Gast, Richard K.; Guraya, Rupa; Jones, Deana R.; Anderson, Kenneth E.; Karcher, Darrin M.

    2017-01-01

    Human infections with Salmonella Enteritidis are often attributed to the consumption of contaminated eggs, so the prevalence of this pathogen in egg-laying poultry is an important public health risk factor. Numerous and complex environmental influences on Salmonella persistence and transmission are exerted by management practices and housing facilities used in commercial egg production. In recent years, the animal welfare implications of poultry housing systems have guided the development of alternatives to traditional cage-based housing, but their food safety consequences are not yet fully understood. The present study assessed the effects of different bird stocking densities on the frequency and duration of fecal shedding of S. Enteritidis in groups of experimentally infected laying hens housed in colony cages enriched with perching and nesting areas. In two trials, groups of laying hens were distributed at two stocking densities (648 and 973 cm2/bird) into enriched colony cages and (along with a group housed in conventional cages at 648 cm2/bird) orally inoculated with doses of 1.0 × 108 cfu of S. Enteritidis. At 10 weekly postinoculation intervals, samples of voided feces were collected from beneath each cage and cultured to detect S. Enteritidis. Fecal shedding of S. Enteritidis was detected for up to 10 weeks postinoculation by hens in all three housing treatment groups. The overall frequency of positive fecal cultures was significantly (P < 0.05) greater from conventional cages than from enriched colony cages (at the lower stocking density) for the total of all sampling dates (45.0 vs. 33.3%) and also for samples collected at 4–9 weeks postinfection. Likewise, the frequency of S. Enteritidis isolation from feces from conventional cages was significantly greater than from enriched colony cages (at the higher hen stocking density) for the sum of all samples (45.0 vs. 36.7%) and at 6 weeks postinoculation. Moreover, the frequency of S

  13. Vaccination with Clostridium perfringens recombinant proteins in combination with Montanide™ ISA 71 VG adjuvant increases protection against experimental necrotic enteritis in commercial broiler chickens

    Science.gov (United States)

    This study was performed to compare four Clostridium perfringens recombinant proteins as vaccine candidates using the Montanide™ ISA 71 VG adjuvant in an experimental model of necrotic enteritis. Broiler chickens were immunized with clostridial recombinant proteins with ISA 71 VG, and intestinal le...

  14. Immuno-pathological studies on broiler chicken experimentally infected with Escherichia coli and supplemented with neem (Azadirachta indica leaf extract

    Directory of Open Access Journals (Sweden)

    Vikash Sharma

    2016-07-01

    Full Text Available Aim: The present study was conducted to evaluate the effects of neem leaf extract (NLE supplementation on immunological response and pathology of different lymphoid organs in experimentally Escherichia coli challenged broiler chickens. Materials and Methods: For this study, we procured 192-day-old broiler chicks from local hatchery and divided them into Groups A and Group B containing 96 birds each on the first day. Chicks of Group A were supplemented with 10% NLE in water, whereas chicks of Group B were not supplemented with NLE throughout the experiment. At 7th day of age, chicks of Group A were divided into A1 and A2 and Group B into B1 and B2 with 54 and 42 chicks, respectively, and chicks of Groups A1 and B1 were injected with E. coli O78 at 107 colony-forming units/0.5 ml intraperitoneally. Six chicks from each group were sacrificed at 0, 2, 4, 7, 14, 21, and 28 days post infection; blood was collected and thorough post-mortem examination was conducted. Tissue pieces of spleen and bursa of Fabricius were collected in 10% buffered formalin for histopathological examination. Serum was separated for immunological studies. Result: E. coli specific antibody titer was significantly higher in Group A1 in comparison to Group B1. Delayed-type hypersensitivity response against 2,4 dinirochlorobenzene (DNCB antigen was significantly higher in Group A1 as compared to Group B1. Pathological studies revealed that E. coli infection caused depletion of lymphocytes in bursa of Fabricius and spleen. Severity of lesions in Group A1 was significantly lower in comparison to Group B1. Conclusion: 10% NLE supplementation enhanced the humoral as well as cellular immune responses attributed to its immunomodulatory property in experimentally E. coli infected broiler chicken.

  15. [Ultra-high-field MRI in the Chicken Embryo in Ovo - a Model for Experimental Ophthalmology].

    Science.gov (United States)

    Klose, Ronja; Streckenbach, Felix; Hadlich, Stefan; Stahnke, Thomas; Guthoff, Rudolf; Wree, Andreas; Frank, Marcus; Langner, Sönke; Stachs, Oliver; Lindner, Tobias

    2017-12-01

    Ultra-high-field MRI (UHF-MRI) is an outstanding technique for non-invasive and non-destructive imaging of soft tissues and can provide versatile contrasts and high resolution in the µm range. In vivo imaging of the embryonal chick eye with its filigree anatomical structures imposes these requirements. However, due to the short embryonal development cycle, chicken are a favourite animal model for embryonal research studies. Ultra-high-field MRI allows repeated and longitudinal in ovo investigations on the same embryo. In the present study, the limitations and opportunities of in ovo MR-imaging at 7 T were evaluated and the process of eye growth was described in detail. Georg Thieme Verlag KG Stuttgart · New York.

  16. Microencapsulated sorbic acid and nature-identical compounds reduced Salmonella Hadar and Salmonella Enteritidis colonization in experimentally infected chickens.

    Science.gov (United States)

    Grilli, E; Tugnoli, B; Formigoni, A; Massi, P; Fantinati, P; Tosi, G; Piva, A

    2011-08-01

    The reduction of Salmonella prevalence in broilers is a priority in European Union agricultural policies because treatment with antibiotics is forbidden by Regulation (EC) 2160/2003. Two trials were conducted to evaluate the efficacy of a microencapsulated blend of sorbic acid and nature-identical compounds (i.e., chemically synthesized botanicals; SAB) on the reduction of the cecal prevalence and contents of Salmonella enterica serovars Hadar and Enteritidis in experimentally infected chickens. In the first trial, 125 one-day-old Lohmann specific-pathogen-free chickens were assigned to one of the following treatments: negative control (not challenged and not treated), positive control (challenged and not treated), SAB0.3, SAB1, or SAB5 (challenged and treated with the microencapsulated blend included in the feed at 0.03, 0.1, or 0.5%, respectively). At 30 d of age, birds were infected with 10(6) cfu of Salmonella Hadar, and after 5, 10, or 20 d postinfection, 5, 10, and 10 birds per treatment, respectively, were killed and the cecal contents and liver and spleen samples were analyzed for Salmonella Hadar. In the second trial, 100 one-day-old Ross 708 chickens were assigned to 1 of 5 treatments: control (not treated), SAB0.3, SAB1, SAB2, or SAB5 (treated with the blend included in the feed at 0.03, 0.1, 0.2, or 0.5%, respectively). At 7 d of age, the birds were challenged with 10(5) cfu of Salmonella Enteritidis, and after 7, 14, or 24 d after challenge, 5, 5, and 10 birds per treatment, respectively, were killed and cecal contents were analyzed for Salmonella Enteritidis. Results showed that in the early stage of infection Salmonella prevalence was high in both studies, whereas at the end of the observation periods, the blends at 0.03, 0.1, and 0.5 in the challenge with Salmonella Hadar and at 0.2 and 0.5% in the challenge with Salmonella Enteritidis significantly reduced (by 2 log(10) cfu) the cecal content of Salmonella. This study showed that intestinal

  17. Comparison of the anticoccidial effect of granulated extract of Artemisia sieberi with monensin in experimental coccidiosis in broiler chickens.

    Science.gov (United States)

    Pirali Kheirabadi, Khodadad; Kaboutari Katadj, Jahangir; Bahadoran, Shahab; Teixeira da Silva, Jaime A; Dehghani Samani, Amir; Cheraghchi Bashi, Mehdi

    2014-06-01

    Coccidiosis is the most important parasitic disease of the poultry production industry. Due to increasing resistance to conventional anticoccidial agents, it is necessary to find new anticoccidial compounds. Herbal compounds such as those from Artemisia species are promising weapons in this regard since preliminary studies have shown its anticoccidial effects. To compare the anticoccidial effect of a granulated extract of Artemisia sieberi (GEAS) versus monensin in experimental broiler coccidiosis, 120 one-day old Ross 308 broiler chickens were divided in four groups, each with three replicates (n=10). Group 1 was separated as an uninfected negative control and received no treatment. At 21days of age, groups 2, 3 and 4 were inoculated with a mixed suspension of 2×10(5) oocysts of Eimeria tenella, Eimeria maxima, Eimeria acervulina and Eimeria necatrix. Group 2 was maintained as an infected positive control and received no treatment while groups 3 and 4 received GEAS (5mg/kg feed), and monensin (110mg/kg feed) from the first day until 42days of age as a feed additive, respectively. Five days after inoculation, the number of oocycts per gram (OPG) of feces for 7 successive days was measured. Also, mean body weight (MBW), weight gain (WG), feed intake (FI) and feed conversion ratio (FCR) were determined weekly in all groups and replicates. The results showed that GEAS and monensin improved performance attributes (FI, MBW, WG, FCR) and significantly (P<0.05) decreased OPG in inoculated broiler chickens. Copyright © 2014 Elsevier Inc. All rights reserved.

  18. Mannan-binding lectin (MBL) in two chicken breeds and the correlation with experimental Pasteurella multocida infection

    DEFF Research Database (Denmark)

    Schou, Torben Wilde; Permin, Anders; Christensen, Jens Peter

    2010-01-01

    The present study is the first demonstration of an association of the genetic serum Mannan-binding lectin (MBL) concentration with bacterial infections in chickens. The genetic serum MBL concentration was determined in two chicken breeds, and the association with the specific Pasteurella multocida...... of the chickens, suggesting that MBL plays an important role against P. multocida. A statistically significant negative correlation was found between the specific antibody response and the genetic serum MBL concentration for both breeds. This indicates that MBL in chickens is capable of acting as the first line...... of defence against P. multocida by diminishing the infection before the adaptive immune response takes over. Udgivelsesdato: May...

  19. Effects of challenge dose on faecal shedding of Salmonella ...

    African Journals Online (AJOL)

    Experimental infection of chickens with Salmonella enteritidis is often achieved by oral inoculation of live bacteria to caged chickens. Less information is available on influence of amount of Salmonella a chicken is exposed to during infection on the proportion that is eventually eliminated in faeces. This study evaluated the ...

  20. Experimental assessment of the pathogenicity of two avian influenza A H5 viruses in ostrich chicks (Struthio camelus) and chickens

    DEFF Research Database (Denmark)

    Manvell, R.J.; Jørgensen, Poul Henrik; Nielsen, O.L.

    1998-01-01

    Virus excretion, immune response, and, for chickens, deaths were recorded in 3-week-old ostriches and chickens inoculated by either the intramuscular or intranasal route with one of two influenza A viruses of subtype H5, One of the viruses, A/turkey/England/50-92/91 (H5N1) (50/92), was highly...

  1. Effects of dietary tannic acid and vaccination on the course of coccidiosis in experimentally challenged broiler chicken.

    Science.gov (United States)

    Mansoori, Behzad; Modirsanei, Mehrdad

    2012-06-08

    An experiment was carried out to assess the influence of tannic acid (TA) on integrity of the intestine in broiler chicks vaccinated against coccidiosis and challenged with the disease. In a 2 × 2 factorial design, the trial had five groups of 10 chickens each, including positive (group 2) and negative (group 1) controls. The chickens were kept on wood shavings and fed a commercial maize and soybean-based starter-grower diet. From day 1, groups 3 and 5 received TA (10 g kg(-1)) in their diet. On day 4, birds of groups 4 and 5 were vaccinated orally against coccidiosis with anti-coccidial vaccine, Livacox T™. Each dose of the vaccine contained 300-500 sporulated oocysts of each of Eimeria acervulina, Eimeria maxima and Eimeria tenella. On day 18, all experimental groups except for the negative (group 1) were challenged with 10-fold dose of Livacox T™ to produce a mild coccidiosis infection. Faecal samples of individual birds were collected on day 23, and the number of faecal oocysts was determined. d-Xylose absorption test was also carried out on all birds on day 23. Immediately after d-xylose absorption test, all birds were killed humanely and the intestinal tract was removed, weighed and examined for gross lesions. Results showed that negative (group 1) and positive controls (group 2) had the highest and lowest levels of plasma d-xylose post-ingestion of the substrate, respectively. Vaccination and/or feeding TA raised the level of plasma d-xylose in infected birds, although this was not significant for TA-fed birds. Vaccination reduced but TA increased the total number of oocysts per gram of faeces. Birds of groups 2-5 had distinct intestinal lesions when compared with group 1. However, vaccination prevented intestinal lesions. Relative weights of intestinal parts were the lowest in group 1 and the highest in group 2. Vaccination but not TA reduced the relative weights of intestinal parts in infected birds. It was concluded that dietary tannins may reduce

  2. Examination of virus shedding in semen from vaccinated and from previously infected boars after experimental challenge with porcine reproductive and respiratory syndrome virus

    DEFF Research Database (Denmark)

    Nielsen, Thomas L.; Nielsen, Jens; Have, Per

    1997-01-01

    Danish artificial insemination (AI) centres house several boars antibody positive to porcine reproductive and respiratory syndrome virus as well as PRRSV-naive boars which may become acutely infected, The risk of transmission of PRRSV by semen may therefore constitute a serious problem...... vaccine compared to the non-vaccinated control animals. In contrast, no changes in onset, level and duration of viremia and shedding of virus in semen were observed using the inactivated vaccine, Neither viremia nor seminal shedding of virus was detected in previously PRRSV-infected, PRRSV...

  3. Induction of passive immunity in broiler chickens against Eimeria acervulina by hyperimmune egg yolk immunoglobulin Y.

    Science.gov (United States)

    Lee, S H; Lillehoj, H S; Park, D W; Jang, S I; Morales, A; García, D; Lucio, E; Larios, R; Victoria, G; Marrufo, D; Lillehoj, E P

    2009-03-01

    The protective effect of hyperimmune IgY fraction of egg yolk prepared from hens hyperimmunized with multiple species of Eimeria oocysts on experimental coccidiosis was evaluated in young broilers. Chickens were continuously fed from hatch with a standard diet containing hyperimmune IgY egg yolk powder or a nonsupplemented control diet and orally challenged at d 7 posthatch with 5.0 x 10(3) sporulated Eimeria acervulina oocysts. Body weight gain between d 0 and 10 and fecal oocyst shedding between d 5 and 10 postinfection were determined as parameters of protective immunity. Chickens given 10 or 20% hyperimmune IgY egg yolk powder showed significantly increased BW gain and reduced fecal oocyst shedding compared with control birds fed the nonsupplemented diet. In another trial, lower IgY concentrations (0.01, 0.02, and 0.05%) were used to treat birds with 1.0 x 10(4) oocysts of E. acervulina. Total oocyst shedding was significantly (P chickens fed the 0.02 and 0.05% hyperimmune IgY supplemented-diets compared with animals fed the nonsupplemented diet. Similarly, chickens fed 0.5% of hyperimmune IgY egg yolk powder diet and challenged with 1.0 x 10(4) oocysts exhibited reduced oocyst shedding compared with the control birds given 0.5% of IgY from nonimmunized hen eggs, although BW gain was not affected. We conclude that passive immunization of chickens with anti-coccidia IgY antibodies provide protective immunity against coccidiosis challenge infection.

  4. The successful experimental induction of necrotic enteritis in chickens by Clostridium perfringens: a critical review

    Directory of Open Access Journals (Sweden)

    Shojadoost Bahram

    2012-10-01

    Full Text Available Abstract Necrotic enteritis (NE is one of the most important enteric diseases in poultry and is a high cost to the industry worldwide. It is caused by avian-specific, Necrotic Enteritis Beta toxin (NetB-producing, strains of Clostridium perfringens that also possess in common other virulence-associated genes. In Europe the disease incidence has increased since the ban on in-feed “growth promoting” antibiotics. Because of this, many recent studies of NE have focused on finding different ways to control the disease, and on understanding its pathogenesis. Frustratingly, reproduction of the disease has proven impossible for some researchers. This review describes and discusses factors known to be important in reproducing the disease experimentally, as well as other considerations in reproducing the disease. The critical bacterial factor is the use of virulent, netB-positive, strains; virulence can be enhanced by using tpeL- positive strains and by the use of young rather than old broth cultures to increase toxin expression. Intestinal damaging factors, notably the use of concurrent or preceding coccidial infection, or administration of coccidial vaccines, combined with netB-positive C. perfringens administration, can also be used to induce NE. Nutritional factors, particularly feeding high percentage of cereals containing non-starch polysaccharides (NSP (wheat, rye, and barley enhance disease by increasing digesta viscosity, mucus production and bacterial growth. Animal proteins, especially fish meal, enhance C. perfringens proliferation and toxin production. Other factors are discussed that may affect outcome but for which evidence of their importance is lacking. The review compares the different challenge approaches; depending on the aim of particular studies, the different critical factors can be adjusted to affect the severity of the lesions induced. A standardized scoring system is proposed for international adoption based on gross rather

  5. Experimentally infected domestic ducks show efficient transmission of Indonesian H5N1 highly pathogenic avian influenza virus, but lack persistent viral shedding.

    Directory of Open Access Journals (Sweden)

    Hendra Wibawa

    Full Text Available Ducks are important maintenance hosts for avian influenza, including H5N1 highly pathogenic avian influenza viruses. A previous study indicated that persistence of H5N1 viruses in ducks after the development of humoral immunity may drive viral evolution following immune selection. As H5N1 HPAI is endemic in Indonesia, this mechanism may be important in understanding H5N1 evolution in that region. To determine the capability of domestic ducks to maintain prolonged shedding of Indonesian clade 2.1 H5N1 virus, two groups of Pekin ducks were inoculated through the eyes, nostrils and oropharynx and viral shedding and transmission investigated. Inoculated ducks (n = 15, which were mostly asymptomatic, shed infectious virus from the oral route from 1 to 8 days post inoculation, and from the cloacal route from 2-8 dpi. Viral ribonucleic acid was detected from 1-15 days post inoculation from the oral route and 1-24 days post inoculation from the cloacal route (cycle threshold <40. Most ducks seroconverted in a range of serological tests by 15 days post inoculation. Virus was efficiently transmitted during acute infection (5 inoculation-infected to all 5 contact ducks. However, no evidence for transmission, as determined by seroconversion and viral shedding, was found between an inoculation-infected group (n = 10 and contact ducks (n = 9 when the two groups only had contact after 10 days post inoculation. Clinical disease was more frequent and more severe in contact-infected (2 of 5 than inoculation-infected ducks (1 of 15. We conclude that Indonesian clade 2.1 H5N1 highly pathogenic avian influenza virus does not persist in individual ducks after acute infection.

  6. Therapeutic and Safety Evaluation of Combined Aqueous Extracts of Azadirachta indica and Khaya senegalensis in Chickens Experimentally Infected with Eimeria Oocysts

    Directory of Open Access Journals (Sweden)

    J. G. Gotep

    2016-01-01

    Full Text Available Coccidiosis is a disease of economic importance in poultry causing morbidity and mortality. Reports show that Azadirachta indica and Khaya senegalensis have been used individually in the treatment of avian coccidiosis. We thus investigated the efficacy and safety of the combined aqueous extracts of these plants for the treatment of experimentally induced coccidiosis in broiler chickens using oocyst count, oxidative stress biomarkers, serum biochemistry, histology, and haematological parameters. The phytochemical screening revealed the presence of tannins, saponins, cardiac glycosides, and steroids in both extracts. In addition, alkaloids and flavonoids were present in Azadirachta indica. There was significant (p<0.05 dose dependent decrease in oocyst count across the treatment groups with 400 mg/kg of the combined extract being the most efficacious dose. Immunomodulatory and erythropoietic activity was observed. There were decreased intestinal lesions and enhanced antioxidant activity across the treatment groups compared to the negative control. Administration of the combined extract did not cause damage to the liver as ALT, AST, and ALP levels were significantly reduced in the uninfected chickens treated with the extracts compared to control suggesting safety at the doses used. The combined aqueous extracts of K. senegalensis stem bark and Azadirachta indica leaves were ameliorative in chickens infected with coccidiosis.

  7. Pelacakan Secara Imunohistokimiawi Antigen Virus pada Ayam yang Diinfeksi dengan Virus Penyakit Tetelo (IMMUNOHISTOCHEMICAL DETECTION OF VIRAL ANTIGEN IN TISSUE OF CHICKENS EXPERIMENTALLY INFECTED WITH NEWCASTLE DISEASE VIRUS

    Directory of Open Access Journals (Sweden)

    Anak Agung Ayu Mirah Adi

    2013-07-01

    Full Text Available In order to study the distribution of Newcastle disease virus (NDV following infection, chickenswere experimentally infected with visceretropic velogenic NDV isolate. Monoclonal antibodies (mAbsagainst the NDV LaSota vaccine strain were then produced to detect viral antigen in the infectedorgans. The mAbs were firstly tested for their specificity by enzyme linked immunosorbent assay(ELISA using NDV and normal allantoic fluids as antigens. Eight mAbs specific against NDVwere isolated and two mAbs were used for immunodetection of NDV antigen in chicken’s tissues.By immunohistochemistry labeled streptavidin-biotin (LSAB staining NDV–antigen was detectedin paraffin embedded tissues of NDV-infected chickens. NDV antigen was not detected in noninfected chickens. In the infected chickens, high intensity of NDV antigen was detected in thelymphoid tissues, lung and intestine. The NDV antigen with a lesser intensity was detected in thebrain, trachea, liver and myocardium. This study shows that although viscerotropic velogenicNDV isolate can infect almost all organs, the main target of infection are lung, intestine andlymphoids tissues

  8. Serum levels of mannan-binding lectin in chickens prior to and during experimental infection with avian infectious bronchitis virus

    DEFF Research Database (Denmark)

    Juul-Madsen, H.R.; Munch, M.; Handberg, Kurt

    2003-01-01

    Mannan-binding lectin (MBL) is a glycoprotein and a member of the C-type lectin super family, the collectin family, and the acute phase protein family. The MBL exerts its function by directly binding to microbial surfaces through its carbohydrate recognition domains, followed by direct opsonization......, the highest value was found in chickens inoculated after 12 h of activity. Thus, an inverse relation exists between the MBL response and the IBV specific antibody response. The ability of MBL to activate the complement cascade was tested in a heterologous system by deposition of human C4 on the chicken MBL...

  9. MHC haplotype and susceptibility to experimental infections (Salmonella Enteritidis, Pasteurella multocida or Ascaridia galli) in a commercial and an indigenous chicken breed

    DEFF Research Database (Denmark)

    Schou, Torben Wilde; Labouriau, R.; Permin, A.

    2010-01-01

    In three independent experimental infection studies, the susceptibility and course of infection of three pathogens considered of importance in most poultry production systems, Ascaridia galli, Salmonella Enteritidis and Pasteurella multocida was compared in two chicken breeds, the indigenous Viet...... might be associated with resistance. These results demonstrate the presence of local genetic resources in Vietnamese chickens, which could be utilized in breeding programmes aiming at improving disease resistance...

  10. In situ hybridization for the detection of infectious laryngotracheitis virus in sections of trachea from experimentally infected chickens

    DEFF Research Database (Denmark)

    Nielsen, O.L.; Handberg, Kurt; Jørgensen, Poul Henrik

    1998-01-01

    with a mixture of 2 biotinylated, polymerase chain reaction-generated DNA fragments. The fragments correspond to sequences of the ILTV glycoprotein C and thymidine kinase genes. In situ hybridization was seen in 7 out of 7 chickens examined on day 3 p.i., 2 out of 2 examined on day 4 p.i. and 3 out of 3 examined...

  11. A GRB tool shed

    Science.gov (United States)

    Haglin, David J.; Roiger, Richard J.; Hakkila, Jon; Pendleton, Geoffrey; Mallozzi, Robert

    2000-09-01

    We describe the design of a suite of software tools to allow users to query Gamma Ray Burst (GRB) data and perform data mining expeditions. We call this suite of tools a shed (SHell for Expeditions using Datamining). Our schedule is to have a completed prototype (funded via the NASA AISRP) by February, 2002. Meanwhile, interested users will find a partially functioning tool shed at http:/grb.mankato.msus.edu. .

  12. Non-experimental validation of ethnoveterinary plants and indigenous knowledge used for backyard pigs and chickens in Trinidad and Tobago.

    Science.gov (United States)

    Lans, C; Georges, K; Brown, G

    2007-06-01

    This paper presents the findings of an exploratory study on ethnoveterinary medicines used for backyard pigs and backyard chickens in Trinidad and Tobago. Research data was collected from 1995 to September 2000. Six plants are used for backyard pigs. Crushed leaves of immortelle (Erythrina pallida, E. micropteryx) are used to remove dead piglets from the uterus. Leaf decoctions of bois canôt (Cecropia peltata) and bamboo (Bambusa vulgaris) are used for labour pains or leaves are fed as a postpartum cleanser. Boiled green papaya fruit (Carica papaya) is fed to pigs to induce milk let-down. The leaves and flowers of male papaya plants (Carica papaya) are fed to deworm pigs. Sour orange juice (Citrus aurantium) is given to pigs to produce lean meat, and coffee grounds are used for scours. Eyebright and plantain leaves (Plantago major) are used for eye injuries of backyard chickens. Worm grass (Chenopodium ambrosioides) and cotton bush (Gossypium species) are used as anthelmintics. Aloe gel (Aloe vera) is used for internal injuries and the yellow sap from the cut Aloe vera leaf or the juice of Citrus limonia is used to purge the birds. A literature review revealed few toxicity concerns and the potential usefulness of the plants.

  13. Transport Mechanisms and Quality Changes During Frying of Chicken Nuggets--Hybrid Mixture Theory Based Modeling and Experimental Verification.

    Science.gov (United States)

    Bansal, Harkirat S; Takhar, Pawan S; Alvarado, Christine Z; Thompson, Leslie D

    2015-12-01

    Hybrid mixture theory (HMT) based 2-scale fluid transport relations of Takhar coupled with a multiphase heat transfer equation were solved to model water, oil and gas movement during frying of chicken nuggets. A chicken nugget was treated as a heterogeneous material consisting of meat core with wheat-based coating. The coupled heat and fluid transfer equations were solved using the finite element method. Numerical simulations resulted in data on spatial and temporal profiles for moisture, rate of evaporation, temperature, oil, pore pressure, pressure in various phases, and coefficient of elasticity. Results showed that most of the oil stayed in the outer 1.5 mm of the coating region. Temperature values greater than 100 °C were observed in the coating after 30 s of frying. Negative gage-pore pressure (p(w) p(g)) in the hydrophilic matrix causes p(w) < p(g), which further results in negative pore pressure. The coefficient of elasticity was the highest at the surface (2.5 × 10(5) Pa) for coating and the interface of coating and core (6 × 10(5) Pa). Kinetics equation for color change obtained from experiments was coupled with the HMT based model to predict the color (L, a, and b) as a function of frying time. © 2015 Institute of Food Technologists®

  14. Detection of infectious bursal disease virus in various lymphoid tissues of experimentally infected specific pathogen free chickens by different reverse transcription polymerase chain reaction assays

    DEFF Research Database (Denmark)

    Kabell, Susanne; Handberg, Kurt; Kusk, Mette

    2005-01-01

    transcription polymerase chain reaction (RT-PCR) assays, including two recently developed strain-specific assays, were employed for detection of ribonucleic acid (RNA) from three different IBDV strains in bursa tissue samples from experimentally infected specific pathogen free chickens. The virus strains...... included vaccine strain D78, classical strain Faragher 52/70, and the very virulent Danish strain DK01 The presence of the virus infection was confirmed by histopathologic evaluation of bursa lesions. The largest number of positive samples was obtained with a strain-specific two-step multiplex (MPX) RT...... of the IBDV strains used were detected in bursa tissues, whereas only the two virulent strains were detected in bone marrow, spleen, and thymus....

  15. Antibacterial efficacy of ethyl acetate fraction of Psidium guajava leaf aqueous extract on experimental Escherichia coli (O78) infection in chickens.

    Science.gov (United States)

    Geidam, Y A; Ambali, A G; Onyeyili, P A; Tijjani, M B; Gambo, H I; Gulani, I A

    2015-03-01

    This study was desingned to examine the efficacy of ethyl acetate fraction of aqueous extracted Psidium guajava leaves on chicks experimentally-infected with diarrheagenic strain of Escherichia coli O78. A total of 60 ISA brown male chicks were randomly divided into 6 Groups of ten chicks each in separate cages. Group A was not infected and not treated. Groups B, C and D were infected and treated with extracts at a dose of 25, 50 and 100 mg/kg respectively for 10 days. Group E was infected and treated with oxytetracycline while Group F was infected, but left untreated. Chicks from all groups were closely monitored for clinical signs, body weight change and fecal bacterial shedding load during the course of the experiment. Diarrhea, vents pasted with feces, drop in feed intake accompanied by slow weight gain and decreased activity was observed in infected untreated groups. Groups treated with graded doses of the extract experienced a dose-dependent decreased in severity of the clinical signs shown compared to the infected untreated group. Bacterial shedding load was found to be lower in groups treated with the extract and oxytetracycline than those without intervention. Ethyl acetate soluble fraction of leaf extract of Psidium guajava effectively controlled diarrhea and decreased the severity of other clinical signs caused by experimental E. coli infections in chicks.

  16. Prairie Chicken

    Data.gov (United States)

    Kansas Data Access and Support Center — An outline of the general range occupied by greayter and lesser prairie chickens. The range was delineated by expert opinion, then varified by local wildlife...

  17. Experimental study on histopathological changes and tissue tropism of Iranian infectious bronchitis serotype 793/B-like virus in SPF chickens

    Directory of Open Access Journals (Sweden)

    Peyman Bijanzad

    2013-02-01

    Full Text Available Avian infectious bronchitis virus (IBV is prevalent in all countries with intensive poultry flocks. This disease is characterised primarily by respiratory signs, but some IBV strains may also infect other organs such as the intestinal and urogenital tracts. The aim of this study was to characterise the histopathological lesions and tissue tropism of Iranian isolate IR/773/2001(793/B of avian infectious bronchitis virus in different organs of experimentally infected SPF chickens. Forty-two one-day-old, specific pathogen-free (SPF chicks were divided randomly into two groups (21 chicks to each group. At the age of 12 days, one group was inoculated intra-ocularly with 103 EID50 of the 793/B isolate, and the other was kept as the control group. Tissue samples were collected at 2, 4, 6, 8, 10 and 12 days post-inoculation (PI. The IBV virus was detected in the caecal tonsils and cloaca from the 2nd to the 12th day PI. The virus was also detected in the kidneys from days 4–10 PI and in the bursa of Fabricius from days 4–12 PI. The virus was detected in the trachea, lungs and thymus. The most obvious histopathological lesions were found in the trachea, kidney, lungs and bursa of Fabricius. Amongst the lymphoid tissues, histopathological changes were found most frequently in the bursa of Fabricius. The results of this study indicated that the 793/B serotype of IBV is unlikely to cause mortality, severe clinical signs or gross lesions in infected chickens, but its replication in some tissues including the bursa of Fabricius could render birds susceptible to other micro-organisms.

  18. Data linkage dynamics with shedding

    NARCIS (Netherlands)

    Bergstra, J.A.; Middelburg, C.A.

    2008-01-01

    We study shedding in the setting of data linkage dynamics, a simple model of computation that bears on the use of dynamic data structures in programming. Shedding is complementary to garbage collection. With shedding, each time a link to a data object is updated by a program, it is determined

  19. Data linkage dynamics with shedding

    NARCIS (Netherlands)

    Bergstra, J.A.; Middelburg, C.A.

    2010-01-01

    We study shedding in the setting of data linkage dynamics, a simple model of computation that bears on the use of dynamic data structures in programming. Shedding is complementary to garbage collection. With shedding, each time a link to a data object is updated by a program, it is determined

  20. Experimental neosporosis in chickens (Gallus gallus domesticus) with oocysts and tachyzoites of two recent isolates of Neospora caninum reveals resistance to infection

    Science.gov (United States)

    The importance of birds in the biological cycle of Neospora caninum is not clear. Here, we report unsuccessful Neospora infection in Chickens (Gallus gallus domesticus) using two isolates of N. caninum. In experiment #1 conducted in Brazil, 30 White Leghorn chickens were orally inoculated with viabl...

  1. Passive protective effect of chicken egg yolk immunoglobulins against experimental Vibrio anguillarum infection in ayu (Plecoglossus altivelis).

    Science.gov (United States)

    Li, Chang-Hong; Lu, Xin-Jiang; Li, Deng-Feng; Chen, Jiong

    2014-03-01

    Oral administration of chicken egg yolk immunoglobulins (IgY) has attracted much attention as a means for controlling infectious diseases caused by microorganisms. This study evaluated the protective effect of IgY against Vibrio anguillarum infection in ayu, Plecoglossus altivelis. IgY was isolated from egg yolks laid by hens initially immunized with formalin-inactivated V. anguillarum. Lower mortality of ayu was observed in groups treated with anti-V. anguillarum IgY (aVIgY), compared with those treated with saline or with nonspecific IgY (nspIgY). All fish in saline-treated groups died within seven days after bacterial inoculation. The bacterial load in blood, liver, and spleen was significantly lower in fish treated with aVIgY than in fish treated with nspIgY. aVIgY treatment significantly reduced tumor necrosis factor-α (PaTNF-α), interleukin-1β (PaIL-1β), transforming growth factor-β (PaTGF-β), and leukocyte cell-derived chemotaxin-2 (PaLECT2) transcript levels in the head kidney, spleen, and liver of ayu challenged by V. anguillarum, compared with nspIgY treatment. The phagocytic activity of macrophages for V. anguillarum in the presence of specific IgY was significantly higher than that seen for nonspecific IgY. These results suggest that passive immunization by oral intubation with pathogen-specific IgY may provide a valuable treatment for V. anguillarum infection in ayu. Copyright © 2014 Elsevier Ltd. All rights reserved.

  2. Energetic analysis of experimental process in bio diesel production from chicken oil; Analise energetica do proceso experimental de producao de biodiesel a partir de oleo de frango

    Energy Technology Data Exchange (ETDEWEB)

    Bonometo, Ricardo Pacheco [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Programa de Pos-Graduacao em Energia na Agricultura], E-mail: rpbonometo@yahoo.com.br; Justi, Andre Luiz [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Programa de Pos-Graduacao em Irrigacao e Drenagem], E-mail: aljusti@fca.unesp.br; Buchi, Alisson Teixeira [Universidade Estadual Paulista (CEVAP/UNESP), Botucatu, SP (Brazil). Centro de Estudos de Venenos e Animais Peconhentos], E-mail: atbuchi@yahoo.com.br; Saglietti, Jose Roberto [Universidade Estadual Paulista (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Fisica e Biofisica], E-mail: jroberto@ibb.unesp.br

    2010-07-01

    There is a great global concern about the depletion and the high cost of fossil fuel reserves exploitation, more than ever, it is necessary to make a profound study and take advantage of alternative sources that can be used as energy efficiency with an appropriate pricing and low environmental impact. Brazil, which has highlighted using alternative energy sources as the use of ethanol and, in recent years, has been encouraging the expansion of its energy matrix in which the biodiesel will have a strategic importance within the agrobusiness area. Biodiesel is a fuel that can replace the diesel, which is a petroleum derivative. It is an ester, produced in the transesterification reaction of vegetable oils and animal greases, in an alcohol with an additional catalyst, are converted into fatty acids and result in esters with glycerol as sub products. The objective of this study was to estimate the final energy balance for the process biodiesel production from oil chicken waste. The energy balance estimation was quantified in calorific value according to the energy expenditure by calorimetric bomb method. The relationship between input and output of energy was around 0.97. In a first evaluation, the procedures adopted should be improved enough, so the process can become energetic and economically viable. (author)

  3. Protection patterns in duck and chicken after homo- or hetero-subtypic reinfections with H5 and H7 low pathogenicity avian influenza viruses: a comparative study.

    Directory of Open Access Journals (Sweden)

    Coralie Chaise

    Full Text Available Avian influenza viruses are circulating continuously in ducks, inducing a mostly asymptomatic infection, while chickens are accidental hosts highly susceptible to respiratory disease. This discrepancy might be due to a different host response to the virus between these two bird species and in particular to a different susceptibility to reinfection. In an attempt to address this question, we analyzed, in ducks and in chickens, the viral load in infected tissues and the humoral immune response after experimental primary and secondary challenge infections with either homologous or heterologous low pathogenicity avian influenza viruses (LPAIV. Following homologous reinfection, ducks were only partially protected against viral shedding in the lower intestine in conjunction with a moderate antibody response, whereas chickens were totally protected against viral shedding in the upper respiratory airways and developed a stronger antibody response. On the contrary, heterologous reinfection was not followed by a reduced viral excretion in the upper airways of chickens, while ducks were still partially protected from intestinal excretion of the virus, with no correlation to the antibody response. Our comparative study provides a comprehensive demonstration of the variation of viral tropism and control of the host humoral response to LPAIV between two different bird species with different degrees of susceptibility to avian influenza.

  4. Experimental coccidiosis influences the expression of the ABCB1 gene, a physiological important functional marker of intestinal integrity in chickens.

    Science.gov (United States)

    Haritova, Aneliya; Koinarski, Vencislav; Stanilova, Spaska

    2013-01-01

    Efflux transporters belonging to the family of ABC transporters have an important functional role in the maintenance of the intestinal barrier. As efflux transporters they prevent the absorption of toxic substances from feed, while at the same time facilitating the excretion of metabolic waste products as well as drugs from the circulation into the intestinal lumen. As Eimeria tenella infection significantly affects the integrity of caecum, the effects of experimental E. tenella infection on the levels of expression of ABCB1 mRNAs in the intestines and livers of broilers were evaluated. ABCB1 mRNA expression was quantified by qRT-PCR. Its expression levels were significantly down-regulated in the caecum of infected animals. The levels of ABCB1 mRNA were not changed in the duodenum and the liver. After treatment of the animals with sulfapyrazine for three days, not only a significant improvement of the clinical appearance but also a normalization of the P-gp expression was noticed. Although the current study cannot distinguish between the direct effect of the drug on the host and the drug action on the parasite, these results suggest that the treatment of coccidiosis with sulfachlorpyrazine also restored the expression of the investigated efflux transporter in the caecum. This is of clinical significance as P-glycoproteins contribute to the integrity of intestines and their function as important biological barriers, protecting poultry from pathogens and toxic compounds in animal feeds.

  5. Phthalate SHEDS-HT runs

    Data.gov (United States)

    U.S. Environmental Protection Agency — Inputs and outputs for SHEDS-HT runs of DiNP, DEHP, DBP. This dataset is associated with the following publication: Moreau, M., J. Leonard, K. Phillips, J. Campbell,...

  6. Effect of the granulometric characteristics of monensin sodium on controlling experimental coccidiosis in broiler chickens Efeito das características granulométricas da monensina sódica no controle da coccidiose experimental em frangos de corte

    Directory of Open Access Journals (Sweden)

    Luisa Rambozzi

    2012-03-01

    Full Text Available The aim of the present study was to investigate the efficacy of monensin sodium grain size on controlling coccidiosis in broiler chickens. Three hundred and fifty Cobb 700 chicks were infected experimentally with 8 × 10(4 sporulated oocysts of Eimeria spp. The birds were fed with diets supplemented with powdered (n = 150 or granulated (n = 150 monensin, with particle sizes of ≤100 µm and 450-650 µm, respectively. The remaining chicks (n = 50 were used as an unmedicated control group. The birds’ weights and number of oocysts per gram of litter in each group were recorded weekly. A total of 96 birds were randomly selected and culled during the trial. Their intestinal oocyst counts and lesion scores were determined. No significant differences in body weights were found between the groups at the end of the study. The percentages of infected animals, oocyst counts and lesion scores were significantly higher in the control group than in the other two groups; the two treated groups did not show any appreciable differences to each other. Enteritis was observed in 14 birds, all in the group supplemented with granulated monensin. These results suggest that powdered and granulated monensin have comparable efficacy in controlling coccidiosis in broiler chickens. However, treatments with monensin sodium of high grain size may be subject to contraindications relating to enteritis.O presente estudo teve como objetivo investigar a eficácia da monensina sódica com diferentes granulometrias no controle da coccidiose em frangos de corte. Trezentos e cinquenta pintos Cobb 700 foram infectados experimentalmente, utilizando-se 8 × 10(4 oocistos esporulados de Eimeria spp. As aves foram alimentadas com dietas suplementadas com monensina em pó (n = 150 ou granulada (n = 150, com partículas de dimensão ≤100 µm e de 450-650 µm respetivamente. As aves restantes (n = 50 foram utilizadas como grupo controle não sujeito a tratamento. O peso das aves e o n

  7. Dietary Curcuma longa enhances resistance against Eimeria maxima and Eimeria tenella infections in chickens.

    Science.gov (United States)

    Kim, Duk Kyung; Lillehoj, Hyun S; Lee, Sung Hyen; Jang, Seung I; Lillehoj, Erik P; Bravo, David

    2013-10-01

    The effects of dietary supplementation with an organic extract of Curcuma longa on systemic and local immune responses to experimental Eimeria maxima and Eimeria tenella infections were evaluated in commercial broiler chickens. Dietary supplementation with C. longa enhanced coccidiosis resistance as demonstrated by increased BW gains, reduced fecal oocyst shedding, and decreased gut lesions compared with infected birds fed a nonsupplemented control diet. The chickens fed C. longa-supplemented diet showed enhanced systemic humoral immunity, as assessed by greater levels of serum antibodies to an Eimeria microneme protein, MIC2, and enhanced cellular immunity, as measured by concanavalin A-induced spleen cell proliferation, compared with controls. At the intestinal level, genome-wide gene expression profiling by microarray hybridization identified 601 differentially expressed transcripts (287 upregulated, 314 downregulated) in gut lymphocytes of C. longa-fed chickens compared with nonsupplemented controls. Based on the known functions of the corresponding mammalian genes, the C. longa-induced intestinal transcriptome was mostly associated with genes mediating anti-inflammatory effects. Taken together, these results suggest that dietary C. longa could be used to attenuate Eimeria-induced, inflammation-mediated gut damage in commercial poultry production.

  8. Dynamics of Dual Infection with Campylobacter jejuni Strains in Chickens Reveals Distinct Strain-to-Strain Variation in Infection Ecology

    Science.gov (United States)

    Wigley, Paul; Humphrey, Suzanne; Kemmett, Kirsty; Lacharme-Lora, Lizeth; Humphrey, Tom; Williams, Nicola

    2014-01-01

    Although multiple genotypes of Campylobacter jejuni may be isolated from the same commercial broiler flock, little is known about the infection dynamics of different genotypes within individuals or their colonization sites within the gut. Single experimental infections with C. jejuni M1 (sequence type 137, clonal complex 45) and C. jejuni 13126 (sequence type 21, clonal complex 21) revealed that 13126 colonized the ceca at significantly higher levels. The dissemination and colonization sites of the two C. jejuni strains then were examined in an experimental broiler flock. Two 33-day-old broiler chickens were infected with M1 and two with 13126, and 15 birds were left unchallenged. Cloacal swabs were taken postinfection to determine the colonization and shedding of each strain. By 2 days postinfection (dpi), 8/19 birds were shedding M1 whereas none were shedding 13126. At 8 dpi, all birds were shedding both strains. At 18 dpi, liver and cecal levels of each isolate were quantified, while in 10 birds they also were quantified at nine sites throughout the gastrointestinal (GI) tract. 13126 was found throughout the GI tract, while M1 was largely restricted to the ceca and colon. The livers of 7/19 birds were culture positive for 13126 only. These data show that 13126 has a distinctly different infection biology than strain M1. It showed slower colonization of the lower GI tract but was more invasive and able to colonize at a high level throughout the GI tract. The finding that C. jejuni strains have markedly different infection ecologies within the chicken has implications for control in the poultry industry and suggests that the contamination risk of edible tissues is dependent on the isolate involved. PMID:25107966

  9. An evaluation of the effect of sodium bisulfate as a feed additive on Salmonella enterica serotype Enteritidis in experimentally infected broilers.

    Science.gov (United States)

    Kassem, I I; Sanad, Y M; Stonerock, R; Rajashekara, G

    2012-04-01

    The colonization of broiler chickens with Salmonella can pose serious health and economic risks for both consumers and the poultry industry. Because colonization with Salmonella can lead to subsequent contamination of chicken carcasses during processing, preemptive control measures should include the reduction of this pathogen in chickens before slaughter. In this study, we evaluated the effect of sodium bisulfate, a potential antimicrobial feed additive, on Salmonella colonization of experimentally infected broiler chickens. Two hundred and forty 1-d-old chickens were infected orally with Salmonella enterica serotype Enteritidis and divided into 4 groups (each comprised of 60 chickens). Three groups received different concentrations of sodium bisulfate integrated into their feed, while the feed of the fourth group (positive control) was not treated. At time points before the broilers' slaughter age, different organs/tissues (liver, spleen, cecum, and bone marrow) and feces were aseptically collected and tested for the occurrence and density of Salmonella Enteritidis. Our results show that at 3 d postinfection, high colonization with Salmonella Enteritidis was detected and affected all tested tissues and fecal samples. Although colonization decreased across time, Salmonella Enteritidis persisted in the cecum, feces, spleen, and bone marrow, but not in the liver, until slaughter age. Furthermore, the addition of sodium bisulfate to the feed did not significantly reduce Salmonella Enteritidis numbers in infected chickens or affect the shedding of the pathogen.

  10. Experimental study of the impact of antimicrobial treatments on Campylobacter, Enterococcus and PCR-capillary electrophoresis single-strand conformation polymorphism profiles of the gut microbiota of chickens.

    Science.gov (United States)

    Mourand, Gwenaëlle; Jouy, Eric; Bougeard, Stéphanie; Dheilly, Alexandra; Kérouanton, Annaëlle; Zeitouni, Salman; Kempf, Isabelle

    2014-11-01

    An experiment was conducted to compare the impact of antimicrobial treatments on the susceptibility of Campylobacter, Enterococcus faecium and Enterococcus faecalis, and on the diversity of broiler microbiota. Specific-pathogen-free chickens were first orally inoculated with strains of Campylobacter and Enterococcus faecium. Birds were then orally treated with recommended doses of oxytetracycline, sulfadimethoxine/trimethoprim, amoxicillin or enrofloxacin. Faecal samples were collected before, during and after antimicrobial treatment. The susceptibility of Campylobacter, Enterococcus faecium and Enterococcus faecalis strains isolated on supplemented or non-supplemented media was studied and PCR-capillary electrophoresis single-strand conformation polymorphism (CE-SSCP) profiles of the gut microbiota were analysed. Enrofloxacin-resistant Campylobacter were selected in the enrofloxacin-treated group and showed the Thr86Ile mutation in the gyrA gene. Acquisition of the tetO gene in Campylobacter coli isolates was significantly more frequent in birds given oxytetracycline. No impact of amoxicillin treatment on the susceptibility of Campylobacter could be detected. Ampicillin- and sulfadimethoxine/trimethoprim-resistant Enterococcus faecium were selected in amoxicillin-treated broilers, but no selection of the inoculated vancomycin-resistant Enterococcus faecium could be detected, although it was also resistant to tetracycline and sulfadimethoxine/trimethoprim. PCR-CE-SSCP revealed significant variations in a few peaks in treated birds as compared with non-treated chickens. In conclusion, antimicrobial treatments perturbed chicken gut microbiota, and certain antimicrobial treatments selected or co-selected resistant strains of Campylobacter and Enterococcus. © 2014 The Authors.

  11. Myopathy of slaughter chickens

    Directory of Open Access Journals (Sweden)

    Ivo Ingr

    2006-01-01

    Full Text Available High-powered means of slaughter chickens production cause on certain individuals abnormal biochemical development of postmortal changes in their muscles. It consequently lead to interferences of sensory quality of the chicken meat. So called myopathies of the chicken breast meat occur in the low extent. It is typical variation in dark colouring of breast muscle. Veterinary supervision confiscates chickens embodying myopathy by reason of sensorical unacceptable dark muscle colour. Deepness of colour is evaluated by adspection of veterinary supervisors. It is tendency leading to find out objective parameters for evaluating this sensual chicken meat colour variation. Incidence of the chickens with myopathy has been evaluating for 3 years in big poultry slaughter, therewithal high-quality chickens and chickens with perspicuous myopathy have been taking out of slaughter-line. Electric conductivity values and pH values were measuring during 60 till 330 minutes post mortem in breast muscles. Aproximately 9 millions chicken was annually slaughtered and 13 thousands of them was confiscated out of the slaughter line by reason of myopathy. It amounts to 0.14 per cent of annually count of processed chickens. Myopatical chickens had significantly higher muscle pH values as compared with healthy ones. Healthy chicken muscles decreased on ultimative pH values aproximately past 3 hours post mortem. It means pH 6.03, and after 300 minutes decreased to pH 5.82. However, myopatical chickens values varied from pH 6.46 to pH 6.30. Concurrently measured values of electric conductivity significantly corellated with pH values. Whereto, it's predication of similarity chicken myopathies and dark, firm, dry (DFD pork or turkey meat. Beyond unacceptable dark meat colour have disadvantage in poor post mortem acidifying of the meat and in consequence of microbial proteolyse. Significantly correlation between pH and electric conductivity values foreshadows on identification

  12. Isolation and identification of bacteria causing arthritis in chickens

    Directory of Open Access Journals (Sweden)

    B. Y. Rasheed

    2011-01-01

    Full Text Available Sixty chickens 30-55 days old with arthritis symptoms, were collected from different broiler chickens farms, all samples were examined clinically, post mortem and bacterial isolation were done. The results revealed isolation of 26 (50.98% of Staphylococcus aureus, which were found highly sensitive to amoxycillin. The experimental infection of 10 chickens was carried out on 35 days old by intravenous inoculated with 107 cfu/ml of isolated Staphylococcus aureus. Arthritis occurred in 8 (80% chickens. Clinical signs and post mortem findings confined to depression, swollen joints, inability to stand.

  13. Protection of avian influenza (AI vaccines for poultry against infection of field isolates A/Chicken/West Java/Smi-Pat/2006 and A/Chicken/West Java/Smi-Mae/2008 under laboratory condition

    Directory of Open Access Journals (Sweden)

    Risa Indriani

    2011-06-01

    Full Text Available The aim of this research was to study level of protection of avian influenza (AI commercial vaccines available in Indonesia (subtipe H5N1, H5N2 and H5N9 against infection of HPAI field isolates of A/Chicken/West Java/Smi-Pat/2006 and A/Chicken/West Java/Smi-Mae/2008. There were 7 commercial vaccines used in this study, the each vaccines were injected in to 3 weeks old of layer chichickenen intramuscularly. At 3 weeks after vaccination, ten chichickenens from each group were challenged separately with the A/Chicken/West Java/Smi-Pat/2006 and A/Chicken/West Java/Smi-Mae/2008 isolates intranasaly with dose 106 ELD50 per 0,1 ml per chicken. Ten unvaccinated chicken were included in the challenge test as control. The study demonstrate that the AI vaccines with subtipe H5N1 protected chicken (100% against virus of A/Chicken/West Java/Smi-Pat/2006 and 90-100% against virus A/Chicken/West Java/Smi-Mae/2008. Viral shedding were not seen by 2 days post challenge. The AI vaccines with subtipe H5N2 protected chicken at 20-30% against virus of A/Chicken/West Java/Smi-Pat/2006 and protected chicken at 70-100% against virus of A/Chicken/West Java/Smi-Mae/2008. Viral shedding still detected at 8 days post challenge. The AI vaccines AI with subtipe H5N9 did not protect chicken (0% against virus A/Chicken/West Java/Smi-Pat/2006 and protected chicken at 50% against virus A/Chicken/West Java/Smi-Mae/2008. Viral shedding still detected by 8 days post challenge. This study concluded that AI vaccines with subtipe H5N1 are better than other AI subtipe vaccines in preventing HPAI virus A/Chicken/West Java/Smi-Pat/2006 dan A/Chicken/West Java/Smi-Mae/2008 infections under laboratory condition.

  14. Solar heated swine farrowing shed. Final report

    Energy Technology Data Exchange (ETDEWEB)

    1986-01-01

    A swine farrowing shed that uses energy for heat is described. The design of the shed incorporates solar collector glazing, a rock bed storage, and two ventilation fans. The results of solar calculations are presented.

  15. Dissemination of Salmonella enteritidis by experimentally-infected pigeons

    Directory of Open Access Journals (Sweden)

    ÁH Albuquerque

    2013-09-01

    Full Text Available Two groups of domestic pigeons (Columba livia were experimentally infected orally with doses of 9.5 x10(7 and 9.5 x10(9 CFU/mL (group A and B, respectively of a Salmonella Enteritidis (SE strain isolated from chickens. None of the used doses caused mortality of the inoculated birds; however, the pathogen was successfully recovered from the liver and spleen of group B birds on day 7 post-inoculation (dpi. Pathogen shedding, as evaluated through cloacal swabs, occurred in both groups until the 14th day of observation (p <0.05. Among all fecal samples collected from group B (n=4, three different birds shed the pathogen in their feces, out of which two were positive on 3 dpi and one on 7 dpi. The same number of fecal samples was evaluated in group A and only one bird shed the pathogen, on 7 and 14 dpi. The concentration of the microorganism in the feces was lower in group A than any sample from Group B. Salmonella Enteritidis isolated from chickens, when inoculated in pigeons, may be recovered from feces, cloacal swabs and organs, and these birds may contaminate poultry causing economic losses as well as posing a risk to the public health.

  16. The growth and meat quality of H'mong chicken raised by industrial farming

    OpenAIRE

    Nguyen Van Duy; Vu Dinh, Ton; Nguyen Thi, Phuong

    2017-01-01

    This study was carried out at the experimental farm of Vietnam National University of Agriculture from January to December, 2016 on H’mong chickens that were raised by industrial farming. H’mong chickens were raised in three lots in order to observe the survival rate, growth capacity, FCR and quality of meat. The results show that Hmong chicken adapted well with industrial farming method, which supposedly contributed to the improvement in survival rate of chickens (94,1%) compared to tradit...

  17. Evaluation of shedding, tissue burdens, and humoral immune response in goats after experimental challenge with the virulent Brucella melitensis strain 16M and the reduced virulence vaccine strain Rev. 1.

    Directory of Open Access Journals (Sweden)

    Jennifer L Higgins

    Full Text Available Brucella melitensis is the causative agent of brucellosis in small ruminants and is of considerable economic and public health importance in many countries worldwide. The control of disease in humans depends on the control of disease in livestock; however, few counties with endemic B. melitensis infection have been able to successfully eradicate this pathogen. This underscores the need for further research on the pathogenesis of both virulent and vaccine strains of B. melitensis in the small ruminant host. The aim of the present study was to characterize clinical effects, tissue colonization, shedding, and humoral immune response following B. melitensis infection in goats. Both virulent (16M and reduced virulence (Rev. 1 strains of B. melitensis were studied. Pregnant goats were infected at 11-14 weeks of gestation with 8 x 106 or 8 x 107 CFU of B. melitensis. Infection of goats with B. melitensis 16M resulted in an 86% abortion rate. This strain disseminated widely in pregnant does post-infection with none of the 15 sampled tissues spared from colonization. Importantly, we report the first isolation of B. melitensis from muscle tissue in ruminants. Pathogenesis of Rev. 1 infection was variable with two does showing minimal colonization and one doe exhibiting disease similar to that of animals infected with fully virulent 16M. Shedding of B. melitensis in milk occurred in all 16M- and Rev. 1- infected goats. In pregnant animals challenged with virulent B. melitensis, median time to seroconversion was 21 days; however, 2 animals did not seroconvert until after abortion.

  18. Incidence of Latent Virus Shedding during Space Flight

    Science.gov (United States)

    Mehta, Satish K.; Cohrs, Randall J.; Gilden, Donald H.; Tyring, Stephen K.; Ott, C. Mark; Pierson, Duane L.

    2008-01-01

    Measurements of immune parameters of both cellular and innate immunity indicate alterations in immune function in astronauts. Immune changes are due to stress and perhaps other factors associated with launch, flight, and landing phases. Medical relevance of observed changes is not known. The reactivation of latent viruses has been identified as an important in vivo indicator of clinically relevant immune changes. The polymerase chain reaction (PCR) was used to detect the presence of specific viral DNA in body fluids. Initial studies demonstrated Epstein-Barr virus (EBV) reactivation during all 3 mission phases. EBV is shed in saliva following reactivation from B-cells. Incidence of EBV in saliva was higher than control subjects during all 3 mission phases. However, quantitative PCR revealed 10-fold higher levels of EBV DNA present in saliva collected during flight than found in pre- and post flight specimens. To determine if other latent viruses showed similar effects, cytomegalovirus (CMV), another herpes virus, shed in urine following reactivation was studied. A very low incidence (less than 2%) of CMV in urine is found in healthy, lowstressed individuals. However, 25-50% of astronauts shed CMV in their urine before, during, or after flight. Our studies are now focused on varicella-zoster virus (VZV), the etiological agent of chicken-pox during childhood and shingles later in life. We demonstrated reactivation of VZV and shedding of the virus during and after spaceflight in saliva of astronauts with no sign of active infection or symptoms. The maximum shedding of VZV occurred during the flight phase and diminishes rapidly during the first five days after landing. We have utilized the same PCR assay for VZV in a clinical study of shingles patients. Generally, shingles patients shed much more VZV in saliva than astronauts. However, the VZV levels in astronauts overlap with the lower range of VZV numbers in shingles patients. Saliva from shingles patients and

  19. Microbial ecology of Campylobacter jejuni in a United Kingdom chicken supply chain: intermittent common source, vertical transmission, and amplification by flock propagation.

    OpenAIRE

    Pearson, A. D.; Greenwood, M. H.; Feltham, R K; Healing, T. D.; Donaldson, J; Jones, D M; Colwell, R. R.

    1996-01-01

    A study of Campylobacter jejuni on a broiler chicken farm between 1989 and 1994 gave an estimated isolation rate of 27% (3,304 of 12,233) from a 0.9% sample of 1.44 million broiler chickens from six to eight sheds over 32 consecutive rearing flocks comprising 251 broiler shed flocks. During the study, C. jejuni was found in 35.5% of the 251 shed flocks but only 9.2% (23 of 251) had Campylobacter isolates in successive flocks, with 9 of those 23 sheds having the same serotype between consecuti...

  20. Development of serological technique for examination of aspergillosis in chicken

    Directory of Open Access Journals (Sweden)

    Djaenudin Gholib

    2005-06-01

    Full Text Available Aspergillosis detection by using serological method has not been reported in Indonesia. In this case, a study was conducted, by using mycelium extract of A. fumigatus as the antigen. Rabbits and chickens were injected with the antigen to produce positive serum (antiserum. The antigen and antiserum were tested serologicaly by Immunodiffusion/Agar Gel Precipitation (AGP, ELISA and Immunoblot. Chicken serum of broiler and layer collected from field were also included in the test. All positive serum of the experimentally animals gave positive results with all methods of serological tests. No bands of precipitation reaction in AGP test with chicken serum from the field. Both chicken and rabbit positive serum with ELISA test showed high Optical Density (OD, while field chicken serum from broiler commonly gave lower OD compared to layer. Immunoblot test of chicken positive serum showed bands of reaction with the antigen in nitrocellulose membrane, approximately on 33, 38, 44, 52, 70, 77, 97, and 110 kDa, meanwhile field chicken serum with high OD in ELISA test, showed bands approximately on 16, 18, 33, 38, 44, 47, 52, 70, 77, 84, 97, and 110 kDa. It means that the field chicken serum contain immunoglobulin molecules has spesific antibody of aspergillus antigen. It is concluded that the ELISA test can be used for screening on chicken aspergillosis in serological methode.

  1. Chlamydia Psittaci Strains from Broiler Chickens Induce Histopathological Lesions and Mortality in SPF Chickens

    Directory of Open Access Journals (Sweden)

    Yin Lizi

    2015-04-01

    Full Text Available A detailed study on histopathological lesions induced by two C. psittaci outer membrane protein A (ompA genotype B strains (10/423 and 10/525 and one genotype D strain (10/298 in experimentally infected (aerosol specific pathogen free (SPF chickens was performed. The strains were derived from Belgian and French commercially raised broilers with pneumonia. Both genotype B and D strains induced conjunctivitis, rhinitis, sinusitis, tracheitis, bronchitis, pneumonitis, airsacculitis, splenitis, hepatitis, nephritis, and enteritis in sequentially (days 2 to 34 post infection euthanized chickens. Inflammation of the ovaries was only observed in genotype D infected chickens. Overall, the genotype D strain caused more severe gross and histopathological lesions and mortality (54.5% early upon infection. The genotype D strain seemed to replicate faster as severity of the lesions increased more quickly. C. psittaci is a primary pathogen in chickens, and efficient monitoring and control of this emerging zoonotic pathogen is urgently needed.

  2. Campylobacter jejuni strains of human and chicken origin are invasive in chickens after oral challenge

    DEFF Research Database (Denmark)

    Knudsen, Katrine Nørrelund; Bang, Dang Duong; Andresen, Lars Ole

    2006-01-01

    The aim of the study was to evaluate the colonizing ability and the invasive capacity of selected Campylobacter jejuni strains of importance for the epidemiology of C jejuni in Danish broiler chickens. Four C jejuni strains were selected for experimental colonization Studies in day-old and 14-day...... to be associated with the Guillain Barre Syndrome (GBS) in humans. The minimum dose for establishing colonization in the clay-old chickens was approximately 2 cfu, whereas two- to threefold higher doses were required for establishing colonization in the 14-day-old chickens. Two of the C jejuni strains were shown...... to be invasive in orally challenged chickens as well as in three different human epithelial cell lines....

  3. Transcriptomics Research in Chicken

    NARCIS (Netherlands)

    Yang, D.Y.; Gao, C.; Zhu, L.Q.; Tang, L.G.; Liu, J.; Nie, H.

    2012-01-01

    The chicken (Gallus gallus) is an important model organism in genetics, developmental biology, immunology and evolutionary research. Moreover, besides being an important model organism the chicken is also a very important agricultural species and an important source of food (eggs and meat). The

  4. Experimental alteration of limb posture in the chicken (Gallus gallus) and its bearing on the use of birds as analogs for dinosaur locomotion.

    Science.gov (United States)

    Carrano, M T; Biewener, A A

    1999-06-01

    Extant birds represent the only diverse living bipeds, and can be informative for investigations into the life-history parameters of their extinct dinosaurian relatives. However, morphological changes that occurred during early avian evolution, including the unique adoption of a nearly horizontal femoral orientation associated with a shift in center of mass (CM), suggest that caution is warranted in the use of birds as analogs for nonavian dinosaur locomotion. In this study, we fitted a group of white leghorn chickens (Gallus gallus) with a weight suspended posterior to the hip in order to examine the effects on loading and morphology. This caused a CM shift that necessitated a change in femoral posture (by 35 degrees towards the horizontal, P posture towards the horizontal, since this change increases the degree to which the bone axis and the GRF vector produce mediolateral long-axis rotation of the bone. These results support the hypothesis that a postural change during early avian evolution could underlie the allometric differences seen between bird and nonavian dinosaur femora by requiring more robust femoral dimensions in birds due to an increase in torsion.

  5. Comparisons of management practices and farm design on Australian commercial layer and meat chicken farms: Cage, barn and free range.

    Directory of Open Access Journals (Sweden)

    Angela Bullanday Scott

    Full Text Available There are few published studies describing the unique management practices, farm design and housing characteristics of commercial meat chicken and layer farms in Australia. In particular, there has been a large expansion of free range poultry production in Australia in recent years, but limited information about this enterprise exists. This study aimed to describe features of Australian commercial chicken farms, with particular interest in free range farms, by conducting on-farm interviews of 25 free range layer farms, nine cage layer farms, nine barn layer farms, six free range meat chicken farms and 15 barn meat chicken farms in the Sydney basin bioregion and South East Queensland. Comparisons between the different enterprises (cage, barn and free range were explored, including stocking densities, depopulation procedures, environmental control methods and sources of information for farmers. Additional information collected for free range farms include range size, range characteristics and range access. The median number of chickens per shed was greatest in free range meat chicken farms (31,058, followed by barn meat chicken (20,817, free range layer (10,713, barn layer (9,300 and cage layer farms (9,000. Sheds had cooling pads and tunnel ventilation in just over half of both barn and free range meat chicken farms (53%, n = 8 and was least common in free range layer farms (16%, n = 4. Range access in free range meat chicken farms was from sunrise to dark in the majority (93%, n = 14 of free range meat chicken farms. Over half of free range layer farms (56%, n = 14 granted range access at a set time each morning; most commonly between 9:00 to 10.00am (86%, n = 12, and chickens were placed back inside sheds when it was dusk.

  6. Analysis and Prediction of Ice Shedding for a Full-Scale Heated Tail Rotor

    Science.gov (United States)

    Kreeger, Richard E.; Work, Andrew; Douglass, Rebekah; Gazella, Matthew; Koster, Zakery; Turk, Jodi

    2016-01-01

    When helicopters are to fly in icing conditions, it is necessary to consider the possibility of ice shed from the rotor blades. In 2013, a series of tests were conducted on a heated tail rotor at NASA Glenn's Icing Research Tunnel (IRT). The tests produced several shed events that were captured on camera. Three of these shed events were captured at a sufficiently high frame rate to obtain multiple images of the shed ice in flight that had a sufficiently long section of shed ice for analysis. Analysis of these shed events is presented and compared to an analytical Shedding Trajectory Model (STM). The STM is developed and assumes that the ice breaks off instantly as it reaches the end of the blade, while frictional and viscous forces are used as parameters to fit the STM. The trajectory of each shed is compared to that predicted by the STM, where the STM provides information of the shed group of ice as a whole. The limitations of the model's underlying assumptions are discussed in comparison to experimental shed events.

  7. Administration of Poly[di(sodium carboxylatoethylphenoxy)phosphazene] (PCEP) and Avian Beta Defensin as Adjuvants in Inactivated Inclusion Body Hepatitis Virus and its Hexon Protein-Based Experimental Vaccine Formulations in Chickens.

    Science.gov (United States)

    Dar, Arshud; Tipu, Masroor; Townsend, Hugh; Potter, Andy; Gerdts, Volker; Tikoo, Suresh

    2015-12-01

    Inclusion body hepatitis (IBH) is one of the major infectious diseases adversely affecting the poultry industry of the United States and Canada. Currently, no effective and safe vaccine is available for the control of IBH virus (IBHV) infection in chickens. However, based on the excellent safety and immunogenic profiles of experimental veterinary vaccines developed with the use of new generation adjuvants, we hypothesized that characterization of vaccine formulations containing inactivated IBHV or its capsid protein hexon as antigens, along with poly[di(sodium carboxylatoethylphenoxy)phosphazene] (PCEP) and avian beta defensin 2 (ABD2) as vaccine adjuvants, will be helpful in development of an effective and safe vaccine formulation for IBH. Our data demonstrated that experimental administration of vaccine formulations containing inactivated IBHV and a mixture of PCEP with or without ABD2 as an adjuvant induced significantly higher antibody responses compared with other vaccine formulations, while hexon protein-based vaccine formulations showed relatively lower levels of antibody responses. Thus, a vaccine formulation containing inactivated IBHV with PCEP or a mixture of PCEP and ABD2 (with a reduced dosage of PCEP) as an adjuvant may serve as a potential vaccine candidate. However, in order to overcome the risks associated with whole virus inactivated vaccines, characterization of additional viral capsid proteins, including fiber protein and penton of IBHV along with hexon protein in combination with more new generation adjuvants, will be helpful in further improvements of vaccines against IBHV infection.

  8. Genetic effects analysis of myeloid leukemia factor 2 and T cell receptor-beta on resistance to coccidiosis in chickens.

    Science.gov (United States)

    Kim, E-S; Hong, Y H; Lillehoj, H S

    2010-01-01

    Associations between the parameters of resistance to coccidiosis and SNP in 3 candidate genes located on chromosome 1 [T cell receptor-beta (TCR-beta), myeloid leukemia factor 2 (MLF2), and lymphotactin] were determined. Single nucleotide polymorphisms were genotyped in 24 F1 generation and 290 F2 generation birds. Four SNP were identified in the lymphotactin gene, 12 were located in the TCR-beta gene, and 4 in the MLF2 gene. At various times after experimental infection of the F2 generation with Eimeria maxima, BW, fecal oocyst shedding, and biochemical parameters were measured as parameters of coccidiosis resistance. Single marker association test was applied to determine the associations between the 20 SNP and the parameters of coccidiosis resistance. The maximum additive genetic effect on disease resistance of an SNP in MLF2 was explained by BW (P = 0.0002). The SNP in MLF2 significantly associated with BW was also associated with fecal oocyst shedding (P = 0.001). Four SNP associated with oocyst shedding were found within the coding region of TCR-beta (P coccidiosis resistance in chickens.

  9. Are happy chickens safer chickens? Poultry welfare and disease susceptibility.

    Science.gov (United States)

    Humphrey, Tom

    2006-08-01

    1. Contaminated chicken meat remains an internationally important vehicle for human infection with Salmonella and Campylobacter spp. In addition, the last 20 years has seen an international pandemic of human salmonellosis caused by the contamination of eggs with Salmonella Enteritidis. 2. It has been a long held scientific view that Campylobacter spp. and most, if not all of the common zoonotic salmonella, are essentially commensal in chickens. They usually form part of the gut flora and contaminate chicken carcases, for example, by faecal spillage at slaughter. Even when certain salmonella serovars like S. Enteritidis are invasive in laying hens overt evidence of clinical disease is rare and the birds appear to behave normally. 3. Are these bacteria just 'passing through' the avian host and only transient members of the bacterial flora or is there a more dynamic perspective to this infection/colonisation process? Chickens mount antibody responses to both pathogens, which indicate something other than commensalism. Such immune responses, however, do not always result in the clearance of the pathogen. 4. Not all animals in a group will carry salmonella or campylobacter, even under experimental conditions, and will vary, especially those that are outbred, in their responses to pathogen challenge. Identifying the reasons behind this could have important implications for disease control. 5. Both salmonella and campylobacter are more likely to be found in animals, which are compromised and this may explain at least part of the variations seen. Animals are more susceptible to infection when they are in a poor environment, fed a poor diet and/or under physical or psychological stress. 6. Work in this area has naturally focused on pathogens of medical significance and has shown that neurotransmitters such as noradrenaline can markedly alter pathogen behaviour. Other host responses like Interferon gamma can also affect host tissues in a way, which facilitates invasion by

  10. Highly immunogenic prime–boost DNA vaccination protects chickens against challenge with homologous and heterologous H5N1 virus

    Directory of Open Access Journals (Sweden)

    Anna Stachyra

    2014-01-01

    Full Text Available Highly pathogenic avian influenza viruses (HPAIVs cause huge economic losses in the poultry industry because of high mortality rate in infected flocks and trade restrictions. Protective antibodies, directed mainly against hemagglutinin (HA, are the primary means of protection against influenza outbreaks. A recombinant DNA vaccine based on the sequence of H5 HA from the H5N1/A/swan/Poland/305-135V08/2006 strain of HPAIV was prepared. Sequence manipulation included deletion of the proteolytic cleavage site to improve protein stability, codon usage optimization to improve translation and stability of RNA in host cells, and cloning into a commercially available vector to enable expression in animal cells. Naked plasmid DNA was complexed with a liposomal carrier and the immunization followed the prime–boost strategy. The immunogenic potential of the DNA vaccine was first proved in broilers in near-to-field conditions resembling a commercial farm. Next, the protective activity of the vaccine was confirmed in SPF layer-type chickens. Experimental infections (challenge experiments indicated that 100% of vaccinated chickens were protected against H5N1 of the same clade and that 70% of them were protected against H5N1 influenza virus of a different clade. Moreover, the DNA vaccine significantly limited (or even eliminated transmission of the virus to contact control chickens. Two intramuscular doses of DNA vaccine encoding H5 HA induced a strong protective response in immunized chicken. The effective protection lasted for a minimum 8 weeks after the second dose of the vaccine and was not limited to the homologous H5N1 virus. In addition, the vaccine reduced shedding of the virus.

  11. Macrorhabdus ornithogaster in ostrich, rhea, canary, zebra finch, free range chicken, turkey, guinea-fowl, columbina pigeon, toucan, chuckar partridge and experimental infection in chicken, japanese quail and mice Macrorhabdus ornithogaster em avestruzes, ema, canário, mandarim, galinha, peru, galinha da Angola, pombo doméstico, rolinha, tucano, perdiz de chuckar e infecção experimental em galinha, codorna e camundongo

    Directory of Open Access Journals (Sweden)

    N.R.S. Martins

    2006-06-01

    Full Text Available Since 2000, Macrorhabdus ornithogaster "megabacteriosis" has been diagnosed in the avian diseases laboratory in a diversity of avian species and varied spectrum of disease. The disease in some species (chickens, turkeys, guinea fowls was clinically characterized by emaciation, prostration, loss of appetite, cachexia and death, with a typically chronic course. A more acute disease was observed in finches (canary-Serinus and zebra-Taeniopygia and budgerigars (Melopsittacus undulatus. The large rod shaped organism, visible from 100 times magnification, with and without staining, could be detected in sick and also in reasonably normal individuals of some species, such as chickens, turkeys, quails and pigeons. In rheas (Rhea americana, ostriches (Struthio camelus, canaries, zebra-finches, guinea-fowl (Numida meleagris and budgerigars. The disease was severe, causing to up to 100% mortality. The infection could be detected in some species along with other infectious or disease problems, such as endoparasites (helminths, coccidia and ectoparasitism (order Mallophaga or/and order Acarina. The cultivation of M. ornithogaster was successfully achieved in solid and liquid media, originated from chickens (four isolates, guinea fowl (1 isolate, chuckar partridge (1 isolate and canary (1 isolate. A very interesting finding at microscopy was motility of M. ornithogaster, as detected both in cultures obtained on agar for pathogenic fungi and passaged into thioglycolate broth, as well as on samples observed in wet preparations from in vivo. Differences in colony aspects were noted among the isolates. Experimental infections were attempted in chicken and japanese quail, using a chicken isolate, allowing the detection of the organism in the proventriculus and liver in apparently normal birds. One chicken isolate was injected intraperitoneally in Balb/c mice and resulted in 100% mortality.Desde 2000, diversos casos de infecção e doença por Macrorhabdus

  12. Ud af hjemløshed?

    DEFF Research Database (Denmark)

    Pico Geerdsen, Lars; Koch-Nielsen, Inger; Vinther, Henrik

    Hjemløshed er ofte forbundet med en række problemer som misbrug, psykisk sygdom, vold i parforholdet, ringe arbejdsmarkedstilknytning og levevilkår, kriminalitet, gæld og manglende sociale netværk. Det er alle problemer, der kan udløse hjemløshed og potentielt fastholde personer i en hjemløshedst...

  13. Effects of Bacillus subtilis-based direct-fed microbials on growth performance, immune characteristics and resistance against experimental coccidiosis in broiler chickens

    Science.gov (United States)

    The present experiment was conducted to study the effects of dietary Bacillus-based direct-fed microbials (DFMs) on cytokine expression patterns, intestinal intraepithelial lymphocyte (IEL) subpopulation, splenocyte proliferation, macrophage functions and resistance against experimental coccidiosis ...

  14. Improved Load Shedding Scheme considering Distributed Generation

    DEFF Research Database (Denmark)

    Das, Kaushik; Nitsas, Antonios; Altin, Müfit

    2017-01-01

    With high penetration of distributed generation (DG), the conventional under-frequency load shedding (UFLS) face many challenges and may not perform as expected. This article proposes new UFLS schemes, which are designed to overcome the shortcomings of traditional load shedding scheme. These sche......With high penetration of distributed generation (DG), the conventional under-frequency load shedding (UFLS) face many challenges and may not perform as expected. This article proposes new UFLS schemes, which are designed to overcome the shortcomings of traditional load shedding scheme....... These schemes utilize directional relays, power flow through feeders, wind and PV measurements to optimally select the feeders to be disconnected during load shedding such that DG disconnection is minimized while disconnecting required amount of consumption. These different UFLS schemes are compared in terms...

  15. Pathogenicity of Shigella in chickens.

    Science.gov (United States)

    Shi, Run; Yang, Xia; Chen, Lu; Chang, Hong-tao; Liu, Hong-ying; Zhao, Jun; Wang, Xin-wei; Wang, Chuan-qing

    2014-01-01

    Shigellosis in chickens was first reported in 2004. This study aimed to determine the pathogenicity of Shigella in chickens and the possibility of cross-infection between humans and chickens. The pathogenicity of Shigella in chickens was examined via infection of three-day-old SPF chickens with Shigella strain ZD02 isolated from a human patient. The virulence and invasiveness were examined by infection of the chicken intestines and primary chicken intestinal epithelial cells. The results showed Shigella can cause death via intraperitoneal injection in SPF chickens, but only induce depression via crop injection. Immunohistochemistry and transmission electron microscopy revealed the Shigella can invade the intestinal epithelia. Immunohistochemistry of the primary chicken intestinal epithelial cells infected with Shigella showed the bacteria were internalized into the epithelial cells. Electron microscopy also confirmed that Shigella invaded primary chicken intestinal epithelia and was encapsulated by phagosome-like membranes. Our data demonstrate that Shigella can invade primary chicken intestinal epithelial cells in vitro and chicken intestinal mucosa in vivo, resulting in pathogenicity and even death. The findings suggest Shigella isolated from human or chicken share similar pathogenicity as well as the possibility of human-poultry cross-infection, which is of public health significance.

  16. Pathogenicity of Shigella in chickens.

    Directory of Open Access Journals (Sweden)

    Run Shi

    Full Text Available Shigellosis in chickens was first reported in 2004. This study aimed to determine the pathogenicity of Shigella in chickens and the possibility of cross-infection between humans and chickens. The pathogenicity of Shigella in chickens was examined via infection of three-day-old SPF chickens with Shigella strain ZD02 isolated from a human patient. The virulence and invasiveness were examined by infection of the chicken intestines and primary chicken intestinal epithelial cells. The results showed Shigella can cause death via intraperitoneal injection in SPF chickens, but only induce depression via crop injection. Immunohistochemistry and transmission electron microscopy revealed the Shigella can invade the intestinal epithelia. Immunohistochemistry of the primary chicken intestinal epithelial cells infected with Shigella showed the bacteria were internalized into the epithelial cells. Electron microscopy also confirmed that Shigella invaded primary chicken intestinal epithelia and was encapsulated by phagosome-like membranes. Our data demonstrate that Shigella can invade primary chicken intestinal epithelial cells in vitro and chicken intestinal mucosa in vivo, resulting in pathogenicity and even death. The findings suggest Shigella isolated from human or chicken share similar pathogenicity as well as the possibility of human-poultry cross-infection, which is of public health significance.

  17. Dynamic Optimization for Vortex Shedding Suppression

    Directory of Open Access Journals (Sweden)

    Bonis Ioannis

    2016-01-01

    Full Text Available Flows around structures exhibiting vortex shedding induce vibrations that can potentially damage the structure. A way to avoid it is to suppress vortex shedding by controlling the wake. Wake control of laminar flow behind a rotating cylinder is formulated herein as a dynamic optimization problem. Angular cylinder speed is the manipulated variable that is adjusted to suppress vortex shedding by minimizing lift coefficient variation. The optimal angular speed is assumed to be periodic like wake formation. The control problem is solved for different time horizons tH. The impact of tH to control is evaluated and the need for feedback is assessed.

  18. THE METABOLITES OF STREPTOMICETES AS IMMUNOSTIMULATORIN CHICKENS RISING

    Directory of Open Access Journals (Sweden)

    Nicolae STARCIUC

    2015-10-01

    Full Text Available An important part of chickens rising is feeding. A good nutrition is reflected in the bird's performance and its products. Actually the use of additives feed as immunostimulatory is in a great scale. For these reasons our investigations were aimed at studying the influence of metabolitesextracted from Streptomyces strains on the main indices of chickens productivity. Actinomycetes are a group of prokaryotic microorganisms with many important producers of biologically active substances known to wide application in human and veterinary medicine. In ourexperimentswasused the dry and metabolites of streptomycetes which were administered to 3 groups of chickens since one day age respectively in combefeed a dry biomass - 1 g/1 kg and cultural liquid - 1 ml/1 l in drinking water, daily. The duration of examination period was 70 days. Fromeachgroup of chickens periodically were sampled bloud to investigate the total serum protein,albumins and cholesterol. As a results was established that the total protein in bloud serum of experimental groups chickens I and II which was feed with streptomycetes biomass and cultural liquid in drinking water, at the age of 15 days was 31.23 and 30.53 g/l compared with 28.83 g/l on chickens from the control group, respectively albumins was 13.67 g/l compared with 12.33 g/l in the control chickens group, and cholesterol was 4.63 and 4.3 g/l on chickens in groups I and II compared with 4.5 g/l on chickens from the control group. The obtaining results show that the metabolitesof streptomycetes has the stimulatory effect tosomebloodbiochemicalindexes of chickens.

  19. Vortex Shedding From a Flexible Hydrofoil

    CERN Document Server

    Dreyer, Matthieu

    2011-01-01

    Video of vortex shedding in the wake of a Naca0009 hydrofoil made of polyoxymethylene type C (POM C). This video was submitted as part of the Gallery of Fluid Motion 2011 which is showcase of fluid dynamics videos.

  20. Clinical Trials Shed Light on Minority Health

    Science.gov (United States)

    ... Products For Consumers Home For Consumers Consumer Updates Clinical Trials Shed Light on Minority Health Share Tweet Linkedin ... health disparities The importance of including minorities in clinical trials Subscribe: FDA Consumer Health Information Español The Food ...

  1. Coherent structures shed by multiscale cut-in trailing edge serrations on lifting wings

    Science.gov (United States)

    Prigent, S. L.; Buxton, O. R. H.; Bruce, P. J. K.

    2017-07-01

    This experimental study presents the effect of multiscale cut-in trailing edge serrations on the coherent structures shed into the wake of a lifting wing. Two-probe span-wise hot-wire traverses are performed to study spectra, coherence, and phase shift. In addition, planar particle image velocimetry is used to study the spatio-temporal structure of the vortices shed by the airfoils. Compared with a single tone sinusoidal serration, the multiscale ones reduce the vortex shedding energy as well as the span-wise coherence. Results indicate that the vortex shedding is locked into an arch-shaped cell structure. This structure is weakened by the multiscale patterns, which explains the reduction in both shedding energy and coherence.

  2. SHED differentiate into functional odontoblasts and endothelium.

    Science.gov (United States)

    Sakai, V T; Zhang, Z; Dong, Z; Neiva, K G; Machado, M A A M; Shi, S; Santos, C F; Nör, J E

    2010-08-01

    Studies on mechanisms underlying the differentiation of dental pulp stem cells are critical for the understanding of the biology of odontogenesis and for dental tissue engineering. Here, we tested the hypothesis that stem cells from exfoliated deciduous teeth (SHED) differentiate into functional odontoblasts and endothelial cells. SHED were seeded in tooth slice/scaffolds and implanted subcutaneously into immunodeficient mice. SHED differentiated into functional odontoblasts that generated tubular dentin, as determined by tetracycline staining and confocal microscopy. These cells also differentiated into vascular endothelial cells, as determined by beta-galactosidase staining of LacZ-tagged SHED. In vitro, vascular endothelial growth factor (VEGF) induced SHED to express VEGFR2, CD31, and VE-Cadherin (markers of endothelium) and to organize into capillary-like sprouts. VEGF induced ERK and AKT phosphorylation (indicative of differentiation), while inhibiting phosphorylation of STAT3 (indicative of 'stemness'). Collectively, this work demonstrates that SHED can differentiate into angiogenic endothelial cells and odontoblasts capable of generating tubular dentin.

  3. The decay of longitudinal vortices shed from airfoil vortex generators

    Science.gov (United States)

    Wendt, Bruce J.; Reichert, Bruce A.; Foster, Jeffry D.

    1995-01-01

    An experimental study is conducted to examine the crossplane structure and streamwise decay of vortices shed from airfoil-type vortex generators. The vortex generators are set in a counter-rotating array spanning the full circumference of a straight pipe. The span of the vortex generators above the duct surface, h, is approximately equal to the local turbulent boundary layer thickness, delta. Measurement of three-component mean flow velocity in downstream crossplanes are used to characterize the structure of the shed vortices. Measurements in adjacent crossplanes (closely spaced along the streamwise coordinate) characterize the interaction and decay of the embedded vortices. A model constructed by the superposition of Oseen vortices is compared to the data for one test case.

  4. The contribution of aerobic and anaerobic respiration to intestinal colonization and virulence for Salmonella typhimurium in the chicken.

    Science.gov (United States)

    Barrow, Paul Andrew; Berchieri, Angelo; Freitas Neto, Oliveiro Caetano de; Lovell, Margaret

    2015-10-01

    The basic mechanism whereby Salmonella serovars colonize the chicken intestine remains poorly understood. Previous studies have indicated that proton-translocating proteins utilizing oxygen as terminal electron acceptor do not appear to be of major importance in the gut of the newly hatched chicken and consequently they would be even less significant during intestinal colonization of more mature chickens where the complex gut microflora would trap most of the oxygen in the lumen. Consequently, alternative electron acceptors may be more significant or, in their absence, substrate-level phosphorylation may also be important to Salmonella serovars in this environment. To investigate this we constructed mutants of Salmonella enterica serovar Typhimurium defective in various aspects of oxidative or substrate-level phosphorylation to assess their role in colonization of the chicken intestine, assessed through faecal shedding, and virulence. Mutations affecting use of oxygen or alternative electron acceptors did not eliminate faecal shedding. By contrast mutations in either pta (phosphotransacetylase) or ackA (acetate kinase) abolished shedding. The pta but not the ackA mutation also abolished systemic virulence for chickens. An additional ldhA (lactate dehydrogenase) mutant also showed poor colonizing ability. We hypothesise that substrate-level phosphorylation may be more important than respiration using oxygen or alternative electron acceptors for colonization of the chicken caeca.

  5. Shedding light on antibacterial activities of cathelicidins

    NARCIS (Netherlands)

    Schneider, V.A.F.

    2016-01-01

    Antibiotic resistance is continuously increasing and has a tremendous impact on human and animal well-being. Attractive alternatives to conventional antibiotics are host defense peptides (HDP), such as chicken cathelicidin-2 (CATH-2) and porcine proline-rich PR-39. HDPs are small cationic molecules

  6. Factors affecting the development of respiratory disease complex in chickens.

    Science.gov (United States)

    Gross, W B

    1990-01-01

    Factors playing a part in the development of respiratory disease complex in chickens were investigated in a series of experiments. The experimental infection was produced by exposing chickens to Mycoplasma gallisepticum and the B1 vaccine strain of Newcastle disease virus and later exposing them to aerosols containing the O1:K1 serotype of Escherichia coli. Chickens became susceptible (pericarditis or death) to E. coli 8 days after mixed respiratory disease challenge. One day after respiratory disease challenge, lesions consisted of edema and infiltration with lymphoid cells and heterophils. At the time of susceptibility to E. coli, the lesions were strongly lymphoid with many dense follicular areas and very few heterophils. The incidence of pericarditis and death was similar when the concentration of bacteria in the aerosol inoculum ranged between 10(9)/ml and 10(5)/ml. At the time of maximum susceptibility to aerosol challenge, chickens were less susceptible to intravenously administered E. coli than were the uninfected controls. Resistance of chickens that had been selectively bred for a high (HA) or low (LA) antibody response to sheep erythrocytes was compared. HA chickens were more resistant to respiratory agents and less resistant to E. coli than LA line chickens. When the lines were exposed to respiratory disease followed by exposure to aerosols containing E. coli, the HA line had the lowest incidence of pericarditis and death.

  7. Shedding light on diphoton resonances

    Science.gov (United States)

    Craig, Nathaniel; Draper, Patrick; Kilic, Can; Thomas, Scott

    2016-06-01

    The experimental and theoretical implications of heavy digauge boson resonances that couple to, or are comprised of, new charged and strongly interacting matter are investigated. Observation and measurement of ratios of the resonant digauge boson channels W W , Z Z , γ γ , Z γ , and g g in the form of dijets provide a rather direct—and for some ratios a rather robust—probe of the gauge representations of the new matter. For a spin-zero resonance with the quantum numbers of the vacuum, the ratios of resonant W W and Z Z to γ γ channels, as well as the longitudinal vs transverse polarization fractions in the W W and Z Z channels, provide probes for possible mixing with the Higgs boson, while di-Higgs and ditop resonant channels, h h and t t , provide somewhat less sensitivity. We present a survey of possible underlying models for digauge boson resonances by considering various limits for the mass of the new charged and strongly interacting matter fields as well as the confinement scale of new hypergauge interactions under which they may also be charged. In these limits, resonances may be included as elementary weakly coupled spin-zero states or can correspond to hyperglueballs, hyperonia, or pseudoscalar hypermesons. For each of these cases, we make predictions for additional states that could be resonantly or pair produced and observed at the Large Hadron Collider or in future collider experiments. Heavy digauge boson resonances can provide a unified explanation for a number of small discrepancies and excesses in reported data from the Large Hadron Collider.

  8. Mycoplasma gallisepticum Invades Chicken Erythrocytes during Infection▿

    Science.gov (United States)

    Vogl, Gunther; Plaickner, Astrid; Szathmary, Susan; Stipkovits, László; Rosengarten, Renate; Szostak, Michael P.

    2008-01-01

    Recently, it was demonstrated using in vitro assays that the avian pathogen Mycoplasma gallisepticum is able to invade nonphagocytic cells. It was also shown that this mycoplasma can survive and multiply intracellularly for at least 48 h and that this cell invasion capacity contributes to the systemic spread of M. gallisepticum from the respiratory tract to the inner organs. Using the gentamicin invasion assay and a differential immunofluorescence technique combined with confocal laser scanning microscopy, we were able to demonstrate in in vitro experiments that M. gallisepticum is also capable of invading sheep and chicken erythrocytes. The frequencies of invasion of three well-defined M. gallisepticum strains were examined over a period of 24 h, and a significant increase in invasiveness occurred after 8 h of infection. In addition, blood samples derived from chickens experimentally infected via the aerosol route with the virulent strain M. gallisepticum Rlow were analyzed. Surprisingly, M. gallisepticum Rlow was detected in the bloodstream of infected chickens by nested PCR, as well as by differential immunofluorescence and interference contrast microscopy that showed that mycoplasmas were not only on the surface but also inside chicken erythrocytes. This finding provides novel insight into the pathomechanism of M. gallisepticum and may have implications for the development of preventive strategies. PMID:17954728

  9. Mycoplasma gallisepticum invades chicken erythrocytes during infection.

    Science.gov (United States)

    Vogl, Gunther; Plaickner, Astrid; Szathmary, Susan; Stipkovits, László; Rosengarten, Renate; Szostak, Michael P

    2008-01-01

    Recently, it was demonstrated using in vitro assays that the avian pathogen Mycoplasma gallisepticum is able to invade nonphagocytic cells. It was also shown that this mycoplasma can survive and multiply intracellularly for at least 48 h and that this cell invasion capacity contributes to the systemic spread of M. gallisepticum from the respiratory tract to the inner organs. Using the gentamicin invasion assay and a differential immunofluorescence technique combined with confocal laser scanning microscopy, we were able to demonstrate in in vitro experiments that M. gallisepticum is also capable of invading sheep and chicken erythrocytes. The frequencies of invasion of three well-defined M. gallisepticum strains were examined over a period of 24 h, and a significant increase in invasiveness occurred after 8 h of infection. In addition, blood samples derived from chickens experimentally infected via the aerosol route with the virulent strain M. gallisepticum R(low) were analyzed. Surprisingly, M. gallisepticum R(low) was detected in the bloodstream of infected chickens by nested PCR, as well as by differential immunofluorescence and interference contrast microscopy that showed that mycoplasmas were not only on the surface but also inside chicken erythrocytes. This finding provides novel insight into the pathomechanism of M. gallisepticum and may have implications for the development of preventive strategies.

  10. Strategy for Developing Local Chicken

    Directory of Open Access Journals (Sweden)

    Sofjan Iskandar

    2006-12-01

    Full Text Available Chicken industry in Indonesia offer jobs for people in the village areas . The balance in development industry of selected and local chicken has to be anticipated as there has been threat of reducing importation of grand parent stock of selected chicken due to global avian influenza . In the mean time, high appreciation to the local chicken has been shown by the existence of local chicken farms in the size of business scale . For local chicken business, the government has been built programs, projects, and infrastructures, although the programs and projects were dropped scattered in to several institutions, which were end up with less significant impact to the people. Therefore, it is the time that the government should put more efforts to integrate various sources . focusing in enhancing local chicken industry .

  11. Vortex Shedding Inside a Baffled Air Duct

    Science.gov (United States)

    Davis, Philip; Kenny, R. Jeremy

    2010-01-01

    Common in the operation of both segmented and un-segmented large solid rocket motors is the occurrence of vortex shedding within the motor chamber. A portion of the energy within a shed vortex is converted to acoustic energy, potentially driving the longitudinal acoustic modes of the motor in a quasi-discrete fashion. This vortex shedding-acoustic mode excitation event occurs for every Reusable Solid Rocket Motor (RSRM) operation, giving rise to subsequent axial thrust oscillations. In order to better understand this vortex shedding/acoustic mode excitation phenomena, unsteady CFD simulations were run for both a test geometry and the full scale RSRM geometry. This paper covers the results from the subscale geometry runs, which were based on work focusing on the RSRM hydrodynamics. Unsteady CFD simulation parameters, including boundary conditions and post-processing returns, are reviewed. The results were further post-processed to identify active acoustic modes and vortex shedding characteristics. Probable locations for acoustic energy generation, and subsequent acoustic mode excitation, are discussed.

  12. Exposure to a low pathogenic A/H7N2 virus in chickens protects against highly pathogenic A/H7N1 virus but not against subsequent infection with A/H5N1.

    Directory of Open Access Journals (Sweden)

    Júlia Vergara-Alert

    Full Text Available Recent evidences have demonstrated that the presence of low pathogenic avian influenza viruses (LPAIV may play an important role in host ecology and transmission of avian influenza viruses (AIV. While some authors have clearly demonstrated that LPAIV can mutate to render highly pathogenic avian influenza viruses (HPAIV, others have shown that their presence could provide the host with enough immunological memory to resist re-infections with HPAIV. In order to experimentally study the role of pre-existing host immunity, chickens previously infected with H7N2 LPAIV were subsequently challenged with H7N1 HPAIV. Pre-infection of chickens with H7N2 LAPIV conferred protection against the lethal challenge with H7N1 HPAIV, dramatically reducing the viral shedding, the clinical signs and the pathological outcome. Correlating with the protection afforded, sera from chickens primed with H7N2 LPAIV reacted with the H7-AIV subtype in hemagglutination inhibition assay and specifically with the N2-neuraminidase antigen. Conversely, subsequent exposure to H5N1 HPAIV resulted in a two days-delay on the onset of disease but all chickens died by 7 days post-challenge. Lack of protection correlated with the absence of H5-hemagglutining inhibitory antibodies prior to H5N1 HPAIV challenge. Our data suggest that in naturally occurring outbreaks of HPAIV, birds with pre-existing immunity to LPAIV could survive lethal infections with HA-homologous HPAIV but not subsequent re-infections with HA-heterologous HPAIV. These results could be useful to better understand the dynamics of AIV in chickens and might help in future vaccine formulations.

  13. Numerical Investigation on Vortex Shedding from a Hydrofoil with a Beveled Trailing Edge

    Directory of Open Access Journals (Sweden)

    Seung-Jae Lee

    2015-01-01

    study, we numerically investigated vortex shedding from various beveled trailing edges at a Reynolds number of 106. We then compared the numerical results with the experimental data, which show good agreement. We also conducted numerical simulations of wakes behind the hydrofoil at rest in periodically varying flows. Results reveal that vortex shedding is affected by the periodicity of a free-stream flow, as well as the trailing-edge shape.

  14. Ascaridia galli in chickens

    DEFF Research Database (Denmark)

    Ferdushy, Tania; Nejsum, Peter; Roepstorff, Allan Knud

    2012-01-01

    This study was conducted to observe the localization and to compare methods for isolation of minute Ascaridia galli larvae in chicken intestine. Firstly, six 7-week-old layer pullets were orally infected with 2,000 embryonated A. galli eggs and necropsied either at 3, 5 or 7 days post infection...

  15. Paraproteinaemia in inbred chickens.

    Science.gov (United States)

    Pink, J R; McNally, M P; Jaton, J C

    1975-01-01

    Sera from seventy chickens of several inbred lines were screened by cellulose acetate electrophoresis for abnormalities of immunoglobulin production. IgG levels in two sera (both from apparently healthy birds) were unusually high. The IgG proteins purified from these two sera were shown, by isoelectric focusing, to be of restricted heterogeneity. Images FIG. 1 PMID:1201862

  16. Welfare of broiler chickens

    Directory of Open Access Journals (Sweden)

    Federico Sirri

    2010-01-01

    Full Text Available Broiler chickens have been selected for their rapid growth rate as well as for high carcass yields, with particular regard to the breast, and reared in intensive systems at high stocking density ranging from 30 to 40 kg live weight/m2. These conditions lead to a worsening of the welfare status of birds. In Europe a specific directive for the protection of broiler chickens has been recently approved whereas in Italy there is not yet any regulation. The EU directive lays down minimum rules for the protection of chickens kept for meat production and gives indications on management practices with particular focus on stocking density, light regimen and air quality, training and guidance for people dealing with chickens, as well as monitoring plans for holding and slaughterhouse. In this review the rearing factors influencing the welfare conditions of birds are described and detailed information on the effects of stocking density, light regimen, litter characteristic and air quality (ammonia, carbon dioxide, humidity, dust are provided. Moreover, the main health implications of poor welfare conditions of the birds, such as contact dermatitis, metabolic, skeletal and muscular disorders are considered. The behavioural repertoire, including scratching, dust bathing, ground pecking, wing flapping, locomotor activity, along with factors that might impair these aspects, are discussed. Lastly, farm animal welfare assessment through physiological and behavioural indicators is described with particular emphasis on the “Unitary Welfare Index,” a tool that considers a wide range of indicators, including productive traits, in order to audit and compare the welfare status of chickens kept in different farms.

  17. Biocidal activity of chicken defensin-9 against microbial pathogens.

    Science.gov (United States)

    Yacoub, Haitham A; El-Hamidy, Salem M; Mahmoud, Maged M; Baeshen, Mohamed Nabih; Almehdar, Hussein A; Uversky, Vladimir N; Redwan, Elrashdy M; Al-Maghrabi, Omar A; Elazzazy, Ahmed M

    2016-04-01

    In this study we identified the expression patterns of β-defensin-9 in chickens from Saudi Arabia, evaluated the antimicrobial activities of synthetic chicken β-defensin-9 (sAvBD-9) against pathogenic bacteria and fungi, and investigated the mode of action of sAvBD-9 on bacterial cells. The AvBD-9 gene of Saudi chickens encodes a polypeptide of 67 amino acids, which is highly similar to the polypeptide in duck, quail, and goose (97%, 86%, and 87%, respectively) and shares a low sequence similarity with the mammalian defensins. AvBD-9 is expressed in various organs and tissues of Saudi chickens and inhibits the growth of both Gram-negative and Gram-positive bacteria, as well as showing activity against unicellular and multicellular fungi (Aspergillus flavus, A. niger, and Candida albicans). sAvBD-9 completely inhibited the growth of both Gram-positive and Gram-negative bacterial strains as well as Candida albicans. The haemolytic effects of sAvBD-9 were limited. Morphological analysis by TEM revealed that sAvBD-9 induces shortening and swelling of Staphylococcus aureus and Shigella sonni cells, opens holes and deep craters in their envelopes, and leads to the release of their cytoplasmic content. Our data shed light on the potential applications of sAvBD-9 in the pharmaceutical industry.

  18. Effect of Feeding Conditions on the Methylation Status of Fatp1 Gene in Chicken Breast Muscle

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    G Gao

    Full Text Available ABSTRACT The objective of this work was to investigate the effect of feeding conditions on methylation status of FATP1 gene, which is an important candidate gene of Intramuscular fat and important indicator of chicken meat quality. We selected Daninghe (DNH and Qingjiaoma (QJM chickens under scatter-feeding and captivity-feeding conditions as experimental animals, and detected the methylation status of FATP1 genes in chicken breast muscle using Bisulfite Sequencing PCR method. The results showed that the methylation level of FATP1 in scatter-fed chicken was lower than in captivity-fed conditions in DNH and QIM chicken breast tissues; DNA methylation in the promoter and exon1 region was demonstrated to negatively regulate the expression of the FATP1 gene. These results suggested that feeding conditions affect the methylation status and expression level of FATP1, thereby affecting the Intramuscular fat content in DNH and QJM chicken breast muscle.

  19. Population dynamics of Ascaridia galli following single infection in young chickens

    DEFF Research Database (Denmark)

    Ferdushy, Tania; Luna Olivares, Luz Adilia; Nejsum, Peter

    2013-01-01

    SUMMARY The population dynamics of Ascaridia galli was studied in 70 ISA Brown layer pullets, 42 of them were each experimentally infected with 500 embryonated A. galli eggs and 28 chickens were kept as uninfected controls. Six chickens from the infected group and 4 from the control group were ne...

  20. Dietary Curcuma longa enhances resistance against Eimeria maxima and Eimeria tenella infections in chickens

    Science.gov (United States)

    The effects of dietary supplementation with an organic extract of Curcuma longa on systemic and local immune responses to experimental Eimeria maxima and E. tenella infections were evaluated in commercial broiler chickens. Infected chickens given the C. longa-containing diet had increased body weig...

  1. Itaalia maalikooli shedöövrid

    Index Scriptorium Estoniae

    1998-01-01

    I8. detsembrist Rüütelkonna hoones näitus "Itaalia maalikooli shedöövreid Eesti Kunstimuuseumi kogust" sarjast "Kadrioru lossi aarded", mis kajastab ka teoste restaureerimist ja uurimistööd. Maali "Püha Joosepi surm" ümberatribueerimisest XVII sajandi Veneetsia meistrile Giovanni Battista Piazzettale

  2. Shedding Light on Dark Matter at Colliders

    CERN Document Server

    Mitsou, Vasiliki A

    2013-01-01

    Dark matter remains one of the most puzzling mysteries in Fundamental Physics of our times. Experiments at high-energy physics colliders are expected to shed light to its nature and determine its properties. This review focuses on recent searches for dark-matter signatures at the Large Hadron Collider, also discussing related prospects in future e+e- colliders.

  3. The autopsy of chicken nuggets reads "chicken little".

    Science.gov (United States)

    deShazo, Richard D; Bigler, Steven; Skipworth, Leigh Baldwin

    2013-11-01

    To determine the contents of chicken nuggets from 2 national food chains. Chicken nuggets have become a major component of the American diet. We sought to determine the current composition of this highly processed food. Randomly selected nuggets from 2 different national fast food chains were fixed in formalin, sectioned and stained for microscopic analysis. Striated muscle (chicken meat) was not the predominate component in either nugget. Fat was present in equal or greater quantities along with epithelium, bone, nerve, and connective tissue. Chicken nuggets are mostly fat, and their name is a misnomer. Copyright © 2013 Elsevier Inc. All rights reserved.

  4. Comparison of control methods for coccidiosis in native Spanish Castellana Negra chickens

    Energy Technology Data Exchange (ETDEWEB)

    Miguel, J. A.; Asenjo, B.; Ciria, J.; Cacho, E. del; Calvo, J. L.

    2008-07-01

    Coccidiosis is a disease responsible for serious economic losses in the poultry industry. This paper compares the effect of coccidiosis infection in a population of experimentally infected Castellana Negra chickens previously administered the ionophores antibiotic monensin (Treatment 1), Alquernat Zyox, a herb-based product (Treatment 2), or a live vaccine based on oocysts selected for precocity (Treatment 3). Fifty birds per treatment were housed in captivity and weighed individually once every two weeks. At nine weeks they were infected with pathogenic oocysts of Eimeria tenella, E. acervulina and E. maxima. No significant differences (P<0.05) were seen in body weight between the birds in the three treatment groups after week 10. The average daily weight gain of the Alquernat Zycox-treated and vaccinated birds was similar over the entire experimental period, and more regular than that of the monensin-treated birds. The number of oocysts eliminated in the faeces and the degree of intestinal injury caused were analysed at 10, 11 and 12 weeks. The vaccine-treated birds shed a smaller number of oocysts in their faeces at 11 and 12 weeks than did those treated with monensin or Alquernat Zycox (P<0.001). At 11 and 12 weeks the vaccine- and Alquernat Zycox-treated birds showed significantly (P<0.05) less intestinal injury than the monensin-treated birds. (Author) 22 refs.

  5. Guinea pigs experimentally infected with vaccinia virus replicate and shed, but do not transmit the virus Cobaias infectadas experimentalmente com vírus vaccínia replicam e excretam, porém não transmitem o vírus

    Directory of Open Access Journals (Sweden)

    Juliana Felipetto Cargnelutti

    2012-06-01

    Full Text Available The origin of vaccinia viruses (VACV associated with vesicular disease in cattle and humans in Southeast Brazil remains uncertain, yet the role of wild species in virus transmission has been suggested. This study investigated the susceptibility and transmission potential by guinea pigs (Cavia porcellus - phylogenetically close to an abundant Brazilian rodent (Cavia aperea - to two VACV strains (P1V and P2V isolated from an outbreak of cutaneous disease in horses in Southern Brazil. Eight guinea pigs inoculated intranasally with P1V and P2V (10(6 TCID50.ml-1 did not develop clinical signs, but six animals shed virus in nasal secretions (day 1 to 9 post-inoculation - pi, developed viremia (between days 1 and 10 pi and seroconverted to VACV. In spite of virus replication and shedding, the virus was not transmitted to sentinel animals by direct or indirect contact (aerosols or through food and water contaminated with virus. These results demonstrate that, in spite of replicating and shedding the virus, guinea pigs do not transmit the virus upon experimental inoculation. This finding makes unlikely a possible participation of related species in VACV maintenance and transmission in nature.A origem dos vírus vaccínia (VACV, envolvidos em surtos de doença vesicular em bovinos e humanos no Sudeste do Brasil, permanece desconhecida, e a participação de espécies silvestres na manutenção e transmissão do vírus tem sido sugerida. O objetivo deste trabalho foi investigar a susceptibilidade e o potencial de transmissão por cobaias (Cavia porcellus - filogeneticamente relacionada a uma espécie de roedor, conhecido por preá (Cavia aperea, bastante abundante no país - a duas cepas de VACV (P1V e P2V isoladas de um surto de doença cutânea em equinos no Rio Grande do Sul. Oito cobaias inoculadas pela via intranasal com uma mistura das amostras P1V e P2V (10(6 DICC50.ml-1 não apresentaram sinais clínicos, porém seis animais excretaram o vírus nas

  6. Salmonella fecal shedding and immune responses are dose- and serotype- dependent in pigs.

    Directory of Open Access Journals (Sweden)

    Renata Ivanek

    Full Text Available Despite the public health importance of Salmonella infection in pigs, little is known about the associated dynamics of fecal shedding and immunity. In this study, we investigated the transitions of pigs through the states of Salmonella fecal shedding and immune response post-Salmonella inoculation as affected by the challenge dose and serotype. Continuous-time multistate Markov models were developed using published experimental data. The model for shedding had four transient states, of which two were shedding (continuous and intermittent shedding and two non-shedding (latency and intermittent non-shedding, and one absorbing state representing permanent cessation of shedding. The immune response model had two transient states representing responses below and above the seroconversion level. The effects of two doses [low (0.65×10(6 CFU/pig and high (0.65×10(9 CFU/pig] and four serotypes (Salmonella Yoruba, Salmonella Cubana, Salmonella Typhimurium, and Salmonella Derby on the models' transition intensities were evaluated using a proportional intensities model. Results indicated statistically significant effects of the challenge dose and serotype on the dynamics of shedding and immune response. The time spent in the specific states was also estimated. Continuous shedding was on average 10-26 days longer, while intermittent non-shedding was 2-4 days shorter, in pigs challenged with the high compared to low dose. Interestingly, among pigs challenged with the high dose, the continuous and intermittent shedding states were on average up to 10-17 and 3-4 days longer, respectively, in pigs infected with S. Cubana compared to the other three serotypes. Pigs challenged with the high dose of S. Typhimurium or S. Derby seroconverted on average up to 8-11 days faster compared to the low dose. These findings highlight that Salmonella fecal shedding and immune response following Salmonella challenge are dose- and serotype-dependent and that the detection of

  7. Immunotherapeutic effects of some sugar cane (Saccharum officinarum L.) extracts against coccidiosis in industrial broiler chickens.

    Science.gov (United States)

    Awais, Mian Muhammad; Akhtar, Masood; Muhammad, Faqir; ul Haq, Ahsan; Anwar, M Irfan

    2011-06-01

    Present paper reports the effects of aqueous and ethanolic extracts of sugar cane (Saccharum officinarum L.) juice and bagasse, respectively on protective immune responses in industrial broiler chickens against coccidiosis. Immunotherapeutic efficacies of the extracts were measured by evaluating their effect on body weight gain, oocyst shedding, lesion score, anti-coccidial indices, per cent protection and elicited serum antibody responses against coccidiosis. Results revealed a significantly lower (P0.01). These results demonstrated that both ethanolic and aqueous extracts of sugar cane possess immune enhancing properties and their administration in chickens augments the protective immunity against coccidiosis. Copyright © 2011 Elsevier Inc. All rights reserved.

  8. Riemerella Anatipestifer Infection in Chickens

    Directory of Open Access Journals (Sweden)

    J. X. Li*, Y. Tang, J. Y. Gao, C. H. Huang1 and M. J. Ding

    2011-01-01

    Full Text Available Riemerella anatipestifer (RA is the causative agent of septicemic and exudative disease for a variety of bird species. Although RA had been isolated from chickens, whether can bring damages to them is not unrevealed yet. In this study, we report a flock of SanHuang chickens infected by RA with 15% morbidity and less than 8% mortality. The infection is further substantiated by case duplicate. The tested chickens demonstrate typical signs of pericarditis, air sacculitis and perihepatitis that are completely consistent with the field outbreak. The results suggest that RA is pathogenic to SanHuang chickens, which can then be theoretically and practicably incorporated into its infection spectrum.

  9. Characterization of vascular endothelial progenitor cells from chicken bone marrow

    Directory of Open Access Journals (Sweden)

    Bai Chunyu

    2012-05-01

    Full Text Available Abstract Background Endothelial progenitor cells (EPC are a type of stem cell used in the treatment of atherosclerosis, vascular injury and regeneration. At present, most of the EPCs studied are from human and mouse, whereas the study of poultry-derived EPCs has rarely been reported. In the present study, chicken bone marrow-derived EPCs were isolated and studied at the cellular level using immunofluorescence and RT-PCR. Results We found that the majority of chicken EPCs were spindle shaped. The growth-curves of chicken EPCs at passages (P 1, -5 and -9 were typically “S”-shaped. The viability of chicken EPCs, before and after cryopreservation was 92.2% and 81.1%, respectively. Thus, cryopreservation had no obvious effects on the viability of chicken EPCs. Dil-ac-LDL and FITC-UAE-1 uptake assays and immunofluorescent detection of the cell surface markers CD34, CD133, VEGFR-2 confirmed that the cells obtained in vitro were EPCs. Observation of endothelial-specific Weibel-Palade bodies using transmission electron microscopy further confirmed that the cells were of endothelial lineage. In addition, chicken EPCs differentiated into endothelial cells and smooth muscle cells upon induction with VEGF and PDGF-BB, respectively, suggesting that the chicken EPCs retained multipotency in vitro. Conclusions These results suggest that chicken EPCs not only have strong self-renewal capacity, but also the potential to differentiate into endothelial and smooth muscle cells. This research provides theoretical basis and experimental evidence for potential therapeutic application of endothelial progenitor cells in the treatment of atherosclerosis, vascular injury and diabetic complications.

  10. Animal Welfare and Food Safety Aspects of Confining Broiler Chickens to Cages

    Science.gov (United States)

    Shields, Sara; Greger, Michael

    2013-01-01

    Simple Summary In commercial chicken meat production, broiler chickens are usually kept on the floor in ware-house like buildings, but the use of cages is becoming more common. Confining chickens to cages is a welfare problem, as has been thoroughly demonstrated for laying hens used for egg production. Caged broiler chickens may suffer from poor bone strength due to lack of exercise, feather loss, and restriction of natural behavior. There are also potential food safety concerns associated with the use of cages. While cages may provide an economic advantage in some geographical regions of the world, the severe, inherent disadvantages should also be considered before cages are more widely adopted in the global broiler chicken industry. Abstract In most areas of the world, broiler chickens are raised in floor systems, but cage confinement is becoming more common. The welfare of broiler chickens in cages is affected by movement restriction, poor bone strength due to lack of exercise, and prevention of key behavioral patterns such as dustbathing and ground scratching. Cages for broiler chickens also have a long history of causing skin and leg conditions that could further compromise welfare, but a lack of controlled studies makes it difficult to draw conclusions about newer cage designs. Cage environments are usually stocked at a higher density than open floor systems, and the limited studies available suggest that caging may lead to increased levels of fear and stress in the birds. Further, birds reared on the floor appear less likely to harbor and shed Salmonella, as litter may serve as a seeding agent for competitive exclusion by other microorganisms. Cages for laying hens used in egg production have met with substantial opposition due to welfare concerns and caging broiler chickens will likely be subject to the same kinds of social disapproval. PMID:26487409

  11. The effect of feeding pre-starter on performance efficiency of local chicken (KUB chicken

    Directory of Open Access Journals (Sweden)

    Sofjan Iskandar

    2014-10-01

    Full Text Available An experiment in feeding pre-starter diets was carried out on local chicken (KUB chicken raised to the age of 84 days. Four hundred and eighty day-old KUB chicks were allocated to experimental diets of P1 = standard diet without pre-starter; P2 = OASIS® pre-starter for 48 hours feeding; P3 = COBA-1, a mixture of 76.3% yolk powder, 0.76% inulin powder, 7.63 % honey and 15.3% tomato sauce, for 24 hours feeding; P4 = P3 given for 48 hours feeding; P5 = fresh papaya for 24 hours feeding; P6 = P5 for 48 hours feeding; P7 = fasting for 24 hours and P8 = fasting for 48 hours. Following treatment, the chicks were then fed with standard diet, containing 17.5 % crude protein with 2800 kcal ME/kg up to the end of the experiment. Results showed that the group of chicken on pre-starter diet of ripe papaya fruit (P5 and P6, responded better EPEF (European Performance Efficiency Factor value of 442 and 356 g/bird, respectively in chicken of P5 and P6. This better response was due to particularly higher viability and the efficiency in utilization of feed.

  12. Chicken Domestication and Indigenous Chicken Breeds of Turkey

    Directory of Open Access Journals (Sweden)

    Muhammet Kaya

    2015-02-01

    Full Text Available The chicken was domesticated in South Asia in 2000 BC and then spread around the world .The red jungle fowl (RJF, Gallus gallus was the ancestor of the chicken. In consequence of long years of domestication and breeding activities, chickens were scattered over various countries, continents and regions. As a result, today there are many chicken breeds in the world. Native breeds are thought to be crossbreds of various breeds brought to Turkey in different time periods. It is difficult to predict when and how the hybridization has been taken shape, because Anatolia has been a passage for a variety of tribes since ancient times. Indigenous chicken breeds in Turkey are Gerze, Sultan and the most well-known Denizli.

  13. CAD Instructor Designs Eco-Friendly Shed

    Science.gov (United States)

    Schwendau, Mark

    2013-01-01

    Dissatisfied with the options offered by big box stores--and wanting to save some money and go as green as possible--the author puts his design and construction skills to good use. In this article, he shares how he designed and built an eco-friendly shed. He says he is very pleased with the results of working with his own design, reducing waste,…

  14. Shedding further light on late globalization

    DEFF Research Database (Denmark)

    Turcan, Romeo V.

    2016-01-01

    In his opening essay on ‘What and/or Who is Late’, Nikhilesh Dholakia delineated inter alia “stage-setting contexts” or levels of analysis which could shed light on the phenomenon of late globalization, including its causes and effects. Indeed, these, especially the effects in contemporary context......, are less understood and researched. To stimulate research on late globalization, Nikhilesh essay is a rich source for conceiving research questions. Herein I will try to do that....

  15. Ultrastructure of parathyroid glands of growing chickens with vitamin D deficiency rickets.

    Science.gov (United States)

    Okada, K; Fujimoto, Y; Itakura, C; Goto, M

    1983-04-01

    Ultrastructural studies were conducted on the parathyroid glands (PTG) of 2- to 7-week-old nontreated control growing broiler chickens (group A, 6 chickens); the same aged chickens with experimentally induced vitamin D deficiency rickets (18 morbid chickens each from groups B, C, and D); and in 4- to 9-week-old chickens naturally affected with rickets (group E, 8 chickens). Four types of principal cells were classified in the PTG of clinically normal birds and in PTG of birds with secondary hyperparathyroidism as follows: Type I cell (small cell in the resting phase); type II cell (medium-sized cell with well-developed rough-surfaced endoplasmic reticulum in the synthesizing phase); type III cell (large cell with well-developed Golgi apparatus and cytoplasmic organelles in the packaging and secretory phase); and type IV cell (medium-sized cell with poor cytoplasmic organelles in the involuting phase). Many coated vesicles were observed in type II and type III cells. In young control chickens, principal cells of the PTG were considered in the resting phase; in older control chickens, there were increased numbers of cells in the synthesizing phase. In the vitamin D deficiency groups, principal cells were in the synthesizing and packaging and secretory phases. In birds with naturally occurring rickets, principal cells were in packaging and secretory phases, with a small number of cells in the involuting phase. The ultrastructural changes of the PTG from the initial to final phases in growing chickens with secondary hyperparathyroidism were demonstrated.

  16. Mucosal Immune Responses against Live Newcastle Disease Vaccine in Immunosuppressed Chickens

    Directory of Open Access Journals (Sweden)

    Zhengui Yan, Yijun Du1, Qingyou Zhao, Ruifeng Fan, Wenlong Guo, Rongde Ma, Xinjian Wang and Ruiliang Zhu*

    2011-10-01

    Full Text Available To evaluate mucosal immunity of normal and immunosuppressed chickens vaccinated with live Newcastle disease (ND vaccine, cyclophosphamide (CY was used to generate immunosuppressed chickens. Normal and immunosuppressed chickens were vaccinated with the Lasota ND vaccine by ocular-nasal route at three weeks of age and challenged with virulent ND virus (vNDV at day 28 post-vaccination (pv. The immunosuppressed chickens had significantly lower relative weight of the bursa of Fabricius and serum antibody HI titers compared to CY-untreated chickens. Compared with normal chickens, significant lower levels of IgA antibodies were detected in tracheal washings, duodenal washings and bile of immunosuppressed chickens in the whole experimental period. Immuno-histochemical experiment also showed that small numbers of IgA positive cells were found in intestinal tissues of immunosuppressed chickens at day 28 pv. There was only a partial protective effect on immunosuppressed chickens post challenge with virulent ND virus (vNDV. These findings increase our understanding of the protective mucosal immune response against ND vaccine and suggest that mucosal immunity play an important role against NDV infection.

  17. Probiotic and Acetic Acid Effect on Broiler Chickens Performance

    Directory of Open Access Journals (Sweden)

    Martin Král

    2011-05-01

    Full Text Available Probiotics and organic acids are widely accepted as an alternative to in-feed antibiotics in poultry production. We carried the experiment with broiler chickens. In experiment we research effect of probiotic and acetic acids on the performance of broiler chickens. A total number of 200 one day old broiler chickens were distributed to two dietary groups. Broiler chickens in control group were fed with standard feed mixture and experimental group 1% vinegar contained 5% acetic acid used in drinking water and probiotics mixed with feed mixture. Body weight, FCR and GIT pH were recorded. The performance showed no statistically significant increase in body weight (P>0.05 in the weeks 1, 2, 3 and 4 of age. The body weight of broiler chickens was significant increase (P0.05 in weeks 5, and 6 of age. In different segments of the GIT was not statistically significant (P>0.05 difference of pH between the control and experimental groups.

  18. Embryo vaccination of chickens using a novel adjuvant formulation stimulates protective immunity against Eimeria maxima infection

    Science.gov (United States)

    Our previous study demonstrated that chickens immunized subcutaneously with an Eimeria recombinant profilin protein vaccine emulsified in a Quil A/cholesterol/DDA/Carbopol (QCDC) adjuvant developed partial protection against experimental avian coccidiosis compared with animals immunized with profili...

  19. Growth performance and nutrient digestibility of broiler chickens fed ...

    African Journals Online (AJOL)

    Two hundred and seventy (270), day old chicks were used in a completely randomized design experimental layout to test the growth performance and nutrient digestibility of broiler chickens fed single phase diets containing natuzyme™ treated groundnut shell at 0, 5, 10, 15, 20 and 25 % inclusion levels. The treatments ...

  20. Effect of solarization with fresh chicken manure on verticillium wilt ...

    African Journals Online (AJOL)

    BİM

    2016-12-28

    Dec 28, 2016 ... plot design, solarization of main plots, sub-plots with fresh chicken manure and V dahliae inoculation were established as a mini parcel in experiment with three replications. .... inoculum was kept in a freezer until it was inoculated in experimental plots. Inoculation of V. dahliae, transplanting of eggplant ...

  1. Attempts to reproduce vacuolar myelinopathy in domestic swine and chickens.

    Science.gov (United States)

    Lewis-Weis, Lynn A; Gerhold, Richard W; Fischer, John R

    2004-07-01

    Avian vacuolar myelinopathy (AVM) was first recognized as a cause of bald eagle (Haliaeetus leucocephalus) mortality in 1994 in Arkansas (USA) and has since caused over 90 bald eagle and numerous American coot (Fulica americana) mortalities in five southeastern states. The cause of AVM remains undetermined but is suspected to be a biotoxin. Naturally occurring AVM has been limited to wild waterbirds, raptors, and one species of shorebird, and has been reproduced experimentally in red-tailed hawks (Buteo jamaicensis). In this study, chickens and swine were evaluated for susceptibility to vacuolar myelinopathy with the intent of developing animal models for research and to identify specific tissues in affected coots that contain the causative agent. Additionally, submerged, aquatic vegetation, primarily hydrilla (Hydrilla verticillata), and associated material collected from a reservoir during an AVM outbreak was fed to chickens in an effort to reproduce the disease. In two separate experiments, six 4-wk-old leghorn chickens and ten 5-wk-old leghorn chickens were fed coot tissues. In a third experiment, five 3-mo-old domestic swine and one red-tailed hawk, serving as a positive control, were fed coot tissues. In these experiments, treatment animals received tissues (brain, fat, intestinal tract, kidney, liver, and/or muscle) from coots with AVM lesions collected at a lake during an AVM outbreak. Negative control chickens and one pig received tissues from coots without AVM lesions that had been collected at a lake where AVM has never been documented. In a fourth experiment, eight 3-wk-old leghorn chickens were fed aquatic vegetation material. Four chickens received material from the same lake from which coots with AVM lesions were collected for the previous experiments, and four control chickens were fed material from the lake where AVM has never been documented. Blood was collected and physical and neurologic exams were conducted on animals before and once per week

  2. Experience from insulators with RTV silicon rubber sheds and shed coatings

    Energy Technology Data Exchange (ETDEWEB)

    Vlastos, A.E.; Sherif, E. (Chalmers Univ. of Technology, Hight Voltage Engineering, S-412 96 Gothenburg (SE))

    1990-10-01

    Long-rod composite insulators, with weather sheds made of room temperature vulcanizing silicon rubber compounds (RTV), were exposed for many years to HVAC and HVDC under realistic conditions and natural pollution. This paper reports that it was found that the shed material, quite in contrary to the experience gained from insulators with sheds of other organic materials e.g., EPDM rubber, undergoes a slow degradation which improves the already superior water repelling properties of the silicon rubber compounds. The improvement seems to be due to a low molecular layer which is produced on the surface of the insulator sheds. This layer improves the hydrophobicity of the surface, while protecting the surface from further degradation. Weather sheds of porcelain housing coated with a thin layer of RTV give similar results to those obtained with long-rod silicon rubber insulators. The RTV coating, although it led to increased salt deposit density, reduces the leak currents and the withstand of the insulator under the same pollution conditions.

  3. Evaluation of passive immunotherapeutic efficacy of hyperimmunized egg yolk powder against intestinal colonization of Campylobacter jejuni in chickens.

    Science.gov (United States)

    Paul, Narayan C; Al-Adwani, Salma; Crespo, Rocio; Shah, Devendra H

    2014-11-01

    Campylobacter jejuni is a leading cause of foodborne bacterial gastroenteritis in human. Chickens are the reservoir host of C. jejuni, and contaminated chicken meat is an important source of human infection. Therefore, control of C. jejuni in chickens can have direct effect on human health. In this study we tested the passive immunotherapeutic efficacy of the chicken egg-yolk-derived antibodies, in the form of hyperimmunized egg yolk powder (HEYP), against 7 colonization-associated proteins of C. jejuni, namely, CadF (Campylobacter adhesion to fibronectin), FlaA (flagellar proteins), MOMP (major outer membrane protein), FlpA (fibronectin binding protein A), CmeC (Campylobacter multidrug efflux C), Peb1A (Campylobacter putative adhesion), and JlpA (Jejuni lipoprotein A). Three chicken experiments were performed. In each experiment, chickens were treated orally via feed supplemented with 10% (wt/wt) egg yolk powder. In experiment 1, chicken groups were experimentally infected with C. jejuni (10(8) cfu) followed by treatment with 5 HEYP (CadF, FlaA, MOMP, FlpA, CmeC) for 4 d either individually or as a cocktail containing equal parts of each HEYP. In experiment 2, chickens were treated for 21 d with cocktail containing equal parts of 7 HEYP before and after experimental infection with C. jejuni (10(8) cfu). In experiment 3, chickens were treated with feed containing a cocktail of 7 HEYP before and after (prophylaxis), and after (treatment) experimental infection with C. jejuni (10(5) cfu). Intestinal colonization of C. jejuni was monitored by culturing cecal samples from chickens euthanized at the end of each experiment. The results showed that there were no differences in the cecal colonization of C. jejuni between HEYP treated and nontreated control chickens, suggesting that use of HEYP at the dose and the regimens used in the current study is not efficacious in reducing C. jejuni colonization in chickens. ©2014 Poultry Science Association Inc.

  4. Susceptibility of chickens (Gallus gallus domesticus) to Trichinella patagoniensis.

    Science.gov (United States)

    Pasqualetti, M; Fariña, F; Falzoni, E; Cardillo, N; Aronowicz, T; Krivokapich, S; Rosa, A; Ribicich, M

    2014-09-15

    Trichinella spp. is a genus of parasites that is widespread all over the world. In Argentina, T. spiralis was for years the only species involved in human and animal outbreaks. During the last decade, T. patagoniensis, a new Trichinella species, was discovered in Argentina. Up to now, this species has only been found in cougars (Puma concolor). Experimental infections in pigs, cats, mice and rats with this new genotype showed that cats and mice were the most susceptible hosts. The aim of the present work was to evaluate the susceptibility of chickens to infection with T. patagoniensis. In order to study the intestinal and muscular phase, and the histopathological changes, 27 Leghorn chickens were inoculated per os with 1000 muscle larvae of T. patagoniensis and were euthanized on days 4, 5, 6, 7, 11, 14, 21, 28 and 35. Adult worms of T. patagoniensis were recovered from the small intestine of chickens up to day 14p.i. Gross examination of small intestine showed a moderate congestive appearance. Microscopically, an inflammatory response with lymphocytes and eosinophils in lamina propria, slight hyperemia, oedema and some haemorrhagic areas were detected. Lesions observed in chickens were similar to those described in different animal species during the intestinal phase. No muscular larvae were recovered from the muscle samples. These results suggest that T. patagoniensis is not capable to complete its entire life cycle in chickens. Copyright © 2014 Elsevier B.V. All rights reserved.

  5. Express quality control of chicken eggs by machine vision

    Science.gov (United States)

    Gorbunova, Elena V.; Chertov, Aleksandr N.; Peretyagin, Vladimir S.; Korotaev, Valery V.; Arbuzova, Evgeniia A.

    2017-06-01

    The urgency of the task of analyzing the foodstuffs quality is determined by the strategy for the formation of a healthy lifestyle and the rational nutrition of the world population. This applies to products, such as chicken eggs. In particular, it is necessary to control the chicken eggs quality at the farm production prior to incubation in order to eliminate the possible hereditary diseases, as well as high embryonic mortality and a sharp decrease in the quality of the bred young. Up to this day, in the market there are no objective instruments of contactless express quality control as analytical equipment that allow the high-precision quality examination of the chicken eggs, which is determined by the color parameters of the eggshell (color uniformity) and yolk of eggs, and by the presence in the eggshell of various defects (cracks, growths, wrinkles, dirty). All mentioned features are usually evaluated only visually (subjectively) with the help of normalized color standards and ovoscopes. Therefore, this work is devoted to the investigation of the application opportunities of contactless express control method with the help of technical vision to implement the chicken eggs' quality analysis. As a result of the studies, a prototype with the appropriate software was proposed. Experimental studies of this equipment on a representative sample of eggs from chickens of different breeds have been carried out (the total number of analyzed samples exceeds 300 pieces). The correctness of the color analysis was verified by spectrophotometric studies of the surface of the eggshell.

  6. Shedding light on restoring respiratory function after spinal cord injury

    Directory of Open Access Journals (Sweden)

    Warren J Alilain

    2009-10-01

    Full Text Available Loss of respiratory function is one of the leading causes of death following spinal cord injury. Because of this, much work has been done in studying ways to restore respiratory function following SCI - including pharmacological and regeneration strategies. With the emergence of new and powerful tools from molecular neuroscience, new therapeutically relevant alternatives to these approaches have become available, including expression of light sensitive proteins called channelrhodopsins. In this article we briefly review the history of various attempts to restore breathing after C2 hemisection, and focus on our recent work using the activation of light sensitive channels to restore respiratory function after experimental spinal cord injury. We also discuss how such light induced activity can help shed light on the inner workings of the central nervous system respiratory circuitry that controls diaphragmatic function.

  7. Characterization of Cellular and Humoral Immune Responses After IBV Infection in Chicken Lines Differing in MBL Serum Concentration

    DEFF Research Database (Denmark)

    Kjærup, Rikke Munkholm; Dalgaard, Tina Sørensen; Norup, Liselotte Rothmann

    2014-01-01

    Chickens from two inbred lines selected for high (L10H) or low (L10L) mannose-binding lectin (MBL) serum concentrations were infected with infectious bronchitis virus (IBV), and innate as well as adaptive immunological parameters were measured throughout the experimental period. Chickens with high...... L10H chickens than in the infected and noninfected L10L chickens. Thus, these results indicate that MBL is produced locally and may be involved in the regulation of the cellular immune response after an IBV infection. However, MBL did not appear to influence the humoral immune response after IBV...

  8. Effects of in-feed egg yolk antibodies on Salmonella shedding, bacterial antibiotic resistance, and health of pigs.

    Science.gov (United States)

    Mathew, Alan G; Rattanatabtimtong, Sukanya; Nyachoti, Charles M; Fang, Lin

    2009-02-01

    To determine effects of anti-Salmonella egg yolk antibodies on shedding and antibiotic resistance of Salmonella enterica Typhimurium, newly weaned pigs were randomly assigned to six dietary treatments. These treatment groups were (i) a control (basal) diet without additives and similar diets with (ii) egg yolk powder derived from chickens challenged with Salmonella Typhimurium antigens, (iii) a commercial egg yolk powder control, (iv) apramycin for 14 days followed by carbadox, (v) oxytetracycline, or (vi) spray-dried plasma protein. Treatments were provided beginning on day 3 of the trial, and all pigs were challenged with 5 ml of 10(8) CFU/ml Salmonella Typhimurium on day 7. Fecal samples were collected on days 0, 7, 8, 12, 14, 21, 58, 88, and 118 for isolation of Salmonella and Escherichia coli to determine shedding and antibiotic resistance patterns. Body weights, white blood cell counts, and plasma concentrations of anti-Salmonella immunoglobulin G and porcine interleukin 1beta were analyzed as indicators of animal health. The percentage of pigs shedding Salmonella was lower for antibiotic treatment groups compared with other groups; however, resistance was greater in E. coli from pigs fed antibiotics than in pigs in other treatment groups. Health and performance indicators (pig weight gains, white blood cell counts, and plasma concentrations of anti-Salmonella antibodies) did not differ between treatment groups. These studies indicate that feeding egg yolk containing anti-Salmonella immunoglobulin Y may not be effective in controlling shedding of Salmonella in pigs.

  9. Energy balance in the poultry-shed system and its influence on broiler performance

    OpenAIRE

    Silva,Tatiana P. N. da; Pandorfi,Héliton; Guiselini,Cristiane

    2015-01-01

    ABSTRACT The objective of this study was to determine the energy balance of the poultry-shed system and its effect on broiler performance during the production cycle. The experimental design was completely random with sub-divided blocks. The blocks were composed of five different types of sheds and the sub-blocks of the evaluation times (00:00 h to 23:00 h), allowing an analysis of variance and a comparison between means with the Tukey test. There were no significant differences between the m...

  10. 76 FR 66220 - Automatic Underfrequency Load Shedding and Load Shedding Plans Reliability Standards

    Science.gov (United States)

    2011-10-26

    .... Power systems consist of static components (e.g., transformers and transmission lines) and dynamic... level, rate of voltage decay, or power flow levels) in designing an automatic undervoltage load shedding...: Notice of Proposed Rulemaking. SUMMARY: Under section 215 of the Federal Power Act, the Federal Energy...

  11. Molecular Features Underlying Selectivity in Chicken Bitter Taste Receptors

    Directory of Open Access Journals (Sweden)

    Antonella Di Pizio

    2018-01-01

    Full Text Available Chickens sense the bitter taste of structurally different molecules with merely three bitter taste receptors (Gallus gallus taste 2 receptors, ggTas2rs, representing a minimal case of bitter perception. Some bitter compounds like quinine, diphenidol and chlorpheniramine, activate all three ggTas2rs, while others selectively activate one or two of the receptors. We focus on bitter compounds with different selectivity profiles toward the three receptors, to shed light on the molecular recognition complexity in bitter taste. Using homology modeling and induced-fit docking simulations, we investigated the binding modes of ggTas2r agonists. Interestingly, promiscuous compounds are predicted to establish polar interactions with position 6.51 and hydrophobic interactions with positions 3.32 and 5.42 in all ggTas2rs; whereas certain residues are responsible for receptor selectivity. Lys3.29 and Asn3.36 are suggested as ggTas2r1-specificity-conferring residues; Gln6.55 as ggTas2r2-specificity-conferring residue; Ser5.38 and Gln7.42 as ggTas2r7-specificity conferring residues. The selectivity profile of quinine analogs, quinidine, epiquinidine and ethylhydrocupreine, was then characterized by combining calcium-imaging experiments and in silico approaches. ggTas2r models were used to virtually screen BitterDB compounds. ~50% of compounds known to be bitter to human are likely to be bitter to chicken, with 25, 20, 37% predicted to be ggTas2r1, ggTas2r2, ggTas2r7 agonists, respectively. Predicted ggTas2rs agonists can be tested with in vitro and in vivo experiments, contributing to our understanding of bitter taste in chicken and, consequently, to the improvement of chicken feed.

  12. Carotenoid absorption in chicken intestine.

    Science.gov (United States)

    Gómez, R; Alonso, A; Martín, M

    1978-09-01

    The powdered flowers of marigold (Tagetes erecta) are used as a cheap source of carotenoids in avicultura. Lutein (3,3'-dyhydroxi-alpha-carotene) constitutes up to 85 to 90% of marigold carotenoids. In the plant, lutein is found esterified to palmitic or estearic acid. In chicken, carotenoid is hydrolized in the first portion of the small intestine, and absorbed as free lutein. After the absorption, lutein is not re-esterified in the different chicken tissues.

  13. Hjemløshed i Danmark 2015

    DEFF Research Database (Denmark)

    Benjaminsen, Lars; Lauritzen, Heidi Hesselberg

    Denne rapport indeholder resultaterne af den femte kortlægning af hjemløshed i Danmark i 2015. Kortlægningerne har været gennemført hvert andet år siden 2007. I denne kortlægning er antallet af hjemløse borgere opgjort til 6.138 personer i uge 6, 2015. Det er 318 personer flere end ved den forrige...... kortlægning i 2013, svarende til en stigning på 5 pct. Sammenholdt med 2009, hvor tallet var 4.998 personer, er der siden 2009 sket en stigning på 23 pct. Antallet af hjemløse er steget betydeligt i aldersgruppen mellem 25 og 29 år, hvor der i 2015 blev registreret 797 personer i denne aldersgruppe mod 616...

  14. Chicken genome analysis reveals novel genes encoding biotin-binding proteins related to avidin family

    Directory of Open Access Journals (Sweden)

    Nordlund Henri R

    2005-03-01

    Full Text Available Abstract Background A chicken egg contains several biotin-binding proteins (BBPs, whose complete DNA and amino acid sequences are not known. In order to identify and characterise these genes and proteins we studied chicken cDNAs and genes available in the NCBI database and chicken genome database using the reported N-terminal amino acid sequences of chicken egg-yolk BBPs as search strings. Results Two separate hits showing significant homology for these N-terminal sequences were discovered. For one of these hits, the chromosomal location in the immediate proximity of the avidin gene family was found. Both of these hits encode proteins having high sequence similarity with avidin suggesting that chicken BBPs are paralogous to avidin family. In particular, almost all residues corresponding to biotin binding in avidin are conserved in these putative BBP proteins. One of the found DNA sequences, however, seems to encode a carboxy-terminal extension not present in avidin. Conclusion We describe here the predicted properties of the putative BBP genes and proteins. Our present observations link BBP genes together with avidin gene family and shed more light on the genetic arrangement and variability of this family. In addition, comparative modelling revealed the potential structural elements important for the functional and structural properties of the putative BBP proteins.

  15. Influence of garlic extract on antioxidant status of chicken

    Directory of Open Access Journals (Sweden)

    Zuzana Jakubcova

    2014-02-01

    Full Text Available In 2006 the European Union banned the feeding of antibiotic growth promoters because of possible risk of drug resistance in human pathogens bacteria. This is the reason for the study of various phytogenic additives and their extracts as a natural source of biologically important compounds. Antimicrobial substances are a commonly included in chicken feed rations. They are used mainly as prevention against various diseases, and also to stimulate growth. The beneficial effects of garlic on animal organism resulting from their antimicrobial, antioxidative and antihypertensive properities. Studies focused on growth, conversion and meat quality of different types of animals indicate its positive effects. In our experiment we studied the influence of garlic extract in a dose of 0, 10 g and 15 g per 1 kg of chicken feed mixture. We focused on weight gains and antioxidant status of an organism. The experiment took 39 days. 54 seven-day-old chickens were included in the experiment. The chickens were weighed once a week, when aged 11, 17, 24, 31 and 38 days, at the same time of the day. The chickens had ad libitum access to feed ration and water. The chickens were taken blood sample at the end of the experiment when 39 days old. Their antioxidant status were measured using ABTS, FRAP and DPPH methods. Our results show that owing to higher concentration of garlic extract in feed ration the antioxidant status of observed chickens was increased. DPPH method showed an increase in antioxidant status of both experimental groups by 38% (a group with a dose of 10 g/kg of mixture and by 46% (a group with a dose of 15 g/kg of mixture compared to the control group. When using FRAP method, antioxidant status of both G10 and G15 groups increased by 24%, resp. 16%. No evidential differences in antioxidant activity between the experimental groups and control group were found using ABTS method. The supplement of garlic extract into a feed ration did not have any influence

  16. Toxoplasmosis in sentinel chickens (Gallus domesticus) in New England farms: seroconversion, distribution of tissue cysts in brain, heart, and skeletal muscle by bioassay in mice and cats

    Science.gov (United States)

    Free-range chickens are a good indicator of soil contamination with oocysts because they feed from the ground and they are also an important source of infection for cats that in turn shed oocysts after eating tissues of intermediate hosts. Little is known of the epidemiology of toxoplasmosis in chic...

  17. Protective immunity induced in chicken by a single immunization with Mycoplasma gallisepticum immunostimulating complexes (ISCOMS).

    Science.gov (United States)

    Sundquist, B G; Czifra, G; Stipkovits, L

    1996-06-01

    An experimental immunostimulating complex vaccine has been prepared from detergent (Mega-10) solubilized Mycoplasma gallisepticum (MG) antigens. Sucrose gradient centrifugation, SDS-PAGE and immunoblotting studies demonstrated that the ISCOM vaccine contained virtually all of the immunodominant MG membrane proteins, including p64 and p56. Protective immunity generated by the experimental MG ISCOM vaccine was demonstrated in challenge experiments. Chickens immunized with a single dose containing between 1 and 50 micrograms of MG ISCOMs had significantly reduced lesion scores in the air sac after challenge. The reisolation of the challenge MG strain was significantly less frequent from the chickens in vaccinated groups than from the unvaccinated control group. Presence of humoral antibodies in chickens vaccinated with 1-25 micrograms MG ISCOMs was not detectable by blocking ELISA or haemagglutination-inhibition before challenge. Chickens vaccinated once or twice with a 50 micrograms dose were transitory positive by blocking ELISA and rapid plate agglutination before challenge.

  18. Nocturnal drainage wind characteristics in two converging air sheds

    Energy Technology Data Exchange (ETDEWEB)

    Gedayloo, T.; Clements, W.E.; Barr, S.; Archuleta, J.A.

    1980-01-01

    During the short experimental period in the Grants Basin of Northeastern New Mexico a survey was conducted on the complex meteorology of this area. Emphasis was placed on the nocturnal drainage flow because of the potential hazards to the populated areas of Milan and Grants from the effluents of the uranium mining and milling operation in this area. This investigation has shown that the nocturnal drainage flow patterns agree with the winds predicted on the basis of the complex terrain of the area. Because of the surface cooling at night (over 25/sup 0/C during summer and about 20/sup 0/C during winter), air from elevated surrounding areas flows to the low lying regions consequently setting up a nocturnal drainage flow. This regime exists over 60% of the time during summer months and over 65% of the time during winter months with a depth generally less than 200 m. In the San Mateo air shed the drainage flow is east northeast, and in the Ambrosia Lake air shed it is from northwest. The confluence of these two air flows contributes mainly to the drainage flow through the channel formed by La Ja Mesa and Mesa Montanosa. The analysis of data collected by the recording Flats Station confirms the prediction that although the area south of the channel region broadens considerably causing a reduction in flow speed, contributions from the southside of La Jara Mesa and Mesa Montanosa partly compensate for this reduction. The position of this recording station is 15 to 20 km from the populated towns of Milan and Grants. A drainage flow speed of approximately 2.2 m s/sup -1/ and the duration of over 11 hours as recorded by this station indicates that air from the San Mateo and Ambrosia Lake regions may be transported southwards to these population centers during a nocturnal period. In order to test this prediction, a series of multi-atmospheric tracer experiments were conducted in the Grants Basin.

  19. The serologic response to Salmonella enteritidis and Salmonella typhimurium in experimentally infected chickens, followed by an indirect lipopolysaccharide enzyme-linked immunosorbent assay and bacteriologic examinations through a one-year period

    DEFF Research Database (Denmark)

    Skov, M.N.; Feld, Niels Christian; Carstensen, B.

    2002-01-01

    uninfected as controls. The groups were monitored bacteriologically by examination of cloacal swabs and organs and serologically by examination of serum and egg yolk by a lipopolysaccharide enzyme-linked immunosorbent assay throughout the period. Within the first week, 100% of birds in both infected groups...... at the onset of egg production. For both S. typhimurium and S. enteritidis, positive bacteriologic cultures were obtained by sampling from internal organs at the end of the experiment, more than 1 yr from the time of infection. At the age of 6-7 wk, 50% of the chickens in the two infected groups showed...... a measurable serologic response in serum samples. The response persisted throughout the study in both serum and egg yell, samples. The inclusion of serologic methods is a valuable additional tool in the detection of salmonella in poultry, but serology should be used in conjunction with bacteriologic methods...

  20. Veje ind og ud af hjemløshed

    DEFF Research Database (Denmark)

    Benjaminsen, Lars; Enemark, Morten Holm

    Hjemløsheden i Danmark har været stigende i de seneste år. Denne rapport beskriver forløbene op mod hjemløshed, vejene gennem hjemløshed og chancerne for at komme ud af hjemløshed igen. På baggrund af data fra hjemløsetællingerne og fra landets herberger (§ 110-boformer) i perioden 2009-2015 anal...

  1. Characterization of village chicken production performance under ...

    African Journals Online (AJOL)

    Village chicken production was characterized using retrospective and crosssectional methods, where 280 households rearing local chickens in Halaba district of southern Ethiopia were used for data collection. The study revealed that the average flock size was 8.5 chickens (95% CI=7.98 – 9.08). The average number of ...

  2. Nunukan Chicken: Genetic Characteristics, Phenotype and Utilization

    Directory of Open Access Journals (Sweden)

    Tike Sartika

    2006-12-01

    Full Text Available Nunukan chicken is a local chicken from East Kalimantan which spreads out in Tarakan and Nunukan Islands . The chicken has a specific buff color and Columbian type feather and also has very late feathering (VLF trait . The Nunukan cocks and hens have no wing and tail primary feather; the tail feathers are short and fragile . The VLF trait is known to have association with a K gene on the Z chromosome. The chicken is efficient in protein metabolism . Sulfur amino acids (cystine and methionine that needed for feather growth, could be utilized for meat and egg production . The egg production of Nunukan chicken was better than the Kampung chicken . The average of hen day, hen house and peak production of Nunukan chicken was 45 . 39.1 and 62%, respectively, while the Kampung chicken was 35 .9, 30 .9 and 48%, respectively . Based on genetic analysis, the external genotype characteristic of the Nunukan chicken is ii ce ss Idld pp. It means that the phenotype appearance of the Nunukan chicken was columbian and gold feathering type, yellow and white shank color and single comb type. This phenotype is similar to Merawang Chicken . The genetic introgression of the Nunukan chicken is affected by the Rhode Island Red with the genetic introgression value of 0.964 .

  3. Characterization of village chicken production performance under ...

    African Journals Online (AJOL)

    Village chicken production was characterized using retrospective and cross- sectional methods, where 280 households rearing local chickens in Halaba district of southern Ethiopia were used for data collection. The study revealed that the average flock size was 8.5 chickens (95% CI=7.98 – 9.08). The average number of ...

  4. Clostridial necrotic enteritis in chicken associated with growth rate depression

    Directory of Open Access Journals (Sweden)

    Adin Priadi

    2008-03-01

    Full Text Available Clostridium perfringens (C. perfringens is a normal inhabitant of the intestinal tract of chickens as well as a potential pathogen causing necrotic enteritis. C. perfringens only causes necrotic enteritis when it transforms from non-toxin producing type to toxin producing type. The alpha toxin, (phospholipase C is believed to be a key to the occurrence of Clostridial necrotic enteritis (CNE. The best known predisposing factor is mucosal damage, caused by coccidiosis that damages the intestinal lining, making the gut susceptible to infections including C. perfringens. The purpose of this study was to observe the chicken performance in experimental CNE and field cases of CNE. Diagnosis of CNE were made by latex agglutination test, isolation and identification of the agent. Pathological and histopathological changes were also observed. Experimentally, NE could be reproduced when Eimeria sp and C. perfringens spores are inoculated in chicken. Signs of an NE are wet litter and diarrhea, and an increase in mortality is not often obvious. The depression of growth rate and feed efficiency of chicken become noticeable by week 5 because of damage to the intestine and the subsequent reduction in digestion and absorption of food. Subclinical form of CNE was also frequently found in the field, leading to significant decreases in performance. Chicken gut samples examinations revealed that subclinical form of CNE causes damage to the intestinal mucosa caused by C. perfringens leads to decreased digestion and absorption, increased feed conversion ratio and reduced weight gain. Dual infection with C. perfringens and Eimeria sp. was frequently found in field. The results of these studies provide evidence for C. perfringens as a causative bacteria for growth depression.

  5. The Effects of Using Seaweed (E. Cottonii on Physical Quality and Organoleptic of Chicken Nuggets

    Directory of Open Access Journals (Sweden)

    Djalal Rosyidi

    2012-02-01

    Full Text Available This research was experimental method with Completely Random Design.  Seaweed used to chicken nuggets in the vary concentration, namely: 0% (F0, 10% (F1, 20% (F2, 30% (F3, 40% (F4. The observed variables were texture, water holding capacity (WHC, pH, and organoleptic quality of chicken nuggets. Collected data were analyzed using analisys variation method and followed by Duncan analysis if the result on the previous analysis showed significant difference. The  result  showed  that  chicken  nuggets  using  seaweed  gave highly significant effect  (P<0.01 on  texture, WHC, pH, and   organoleptic quality. The best result was chicken nuggets made with used of seaweed  10%;  7.97 N of texture; 4.50% of WHC; 6.16 of pH; 6.98 of texture organoleptic score; and 6.26 of taste organoleptic score. The conclusion of this research was the using of seaweed to chicken nuggets gave a significant effect on  texture, WHC, pH, and organoleptic quality. Based on the result, it suggested that using 10% of seaweed to make chicken nugeets.   Keyword : water holding capacity, chicken nuggets, seaweed

  6. Genotyping of Campylobacter jejuni strains from Danish broiler chickens by restriction fragment length polymorphism of the LPS gene cluster

    DEFF Research Database (Denmark)

    Knudsen, K.N.; Bang, Dang Duong; Nielsen, E.M.

    2005-01-01

    , the LG genotyping method was used to study the genetic stability of four C. jejuni strains after gastrointestinal passage through experimentally infected chickens. Methods and Results: In the present study, the LG genotyping method was modified with respect to the restriction enzymes used. To validate...... no changes in the LG genotype of the C. jejuni strains obtained after experimental passage through chickens. Concusions: All C. jejuni strains obtained from broiler chickens were typeable by the LG genotyping method. Application of the RsaI restriction enzyme improved the method in terms of ease...

  7. Meat juice serology for Toxoplasma gondii infection in chickens

    Directory of Open Access Journals (Sweden)

    Alice Vismarra

    2016-01-01

    Full Text Available Toxoplasma gondii is an important foodborne zoonosis. Free-range chickens are at particularly high risk of infection and are also excellent indicators of soil contamination by oocysts. In the present study, hearts of 77 freerange chickens were collected at slaughter. T. gondii meat juice enzyme-linked immunosorbent assay was performed with a commercial kit, following validation with positive controls, from experimentally infected chickens, and negative ones. Out of 77 samples, only 66 gave sufficient meat juice for serology. Of these, 24 (36.4% were positive for T. gondii considering the 5*standard deviation values (calculated on the optical density of negative controls, while all the samples were negative considering sample/positive% values. Parasite-specific polymerase chain reaction was carried out on all samples obtained from heart tissue and none were positive for the presence of T. gondii DNA. Results would suggest that further study on the use of meat juice with a validated serological test to detect T. gondii in chickens could lead to widespread epidemiological studies in this important intermediate host. However, sample collection and test specificity require further evaluation.

  8. Rosemary as natural antioxidant to prevent oxidation in chicken burgers

    Directory of Open Access Journals (Sweden)

    Daiane PEREIRA

    Full Text Available Abstract Rosemary (Rosmarinus officinalis is known for their sensory characteristics and antioxidant properties, mainly due to the presence of several phenolic compounds. The aim of this work, was determine the antioxidant activity and apply the Rosemary lyophilized extract (RLE in chicken burger, for assess their ability to reduce the lipid oxidation. Total antioxidant capacity and phenolic compounds profile were analyzed by colorimetric tests and liquid chromatography analysis, respectively. Thiobarbituric acid reactive substances assay was used to evaluate the ability of the RLE to prevent lipid peroxidation in chicken burger stored at 4 °C. Three treatments of chicken burgers were prepared (T1 – control, without addition of synthetic antioxidant BHT: butylated hydroxytoluene or RLE, T2 – with addition of BHT, and T3 – experimental, containing RLE. The high contents of total phenolic compounds (40.91 mg GAE g-1: Gallic Acid Equivalent and total flavonoids (24.26 mg QE g-1: Quercetin Equivalents were found in RLE. Rutin was the major phenolic compound identified in the RLE. The RLE showed strong antioxidant capacity and inhibited 48.29% of lipid oxidation (21 days of storage in comparison to the control (T1, with low production of malonaldehyde, which has potential to be used in chicken burgers.

  9. Influence of chicken serum mannose-binding lectin levels on the immune response towards Escherichia coli.

    Science.gov (United States)

    Norup, L R; Dalgaard, T S; Friggens, N C; Sørensen, P; Juul-Madsen, H R

    2009-03-01

    This study aimed to investigate the effect of mannose-binding lectin (MBL) on infections with Escherichia coli in chickens. Initially, the basic levels of MBL in 4 different lines of layer chickens, namely ISA Brown, Lohmann Selected Leghorn, Lohmann Braun, and Hellevad, were investigated. This investigation revealed a 2-to 3-fold difference in the basic levels of MBL in serum between some of these commercial lines. Furthermore, the ontogeny of the basic level of MBL in serum of an experimental chicken line was investigated. The level of MBL was very stabile for long periods, with an elevation at 5 to 7 wk of age. Another elevation in MBL level started around 18 to 19 wk of age and stayed elevated at least until 38 wk of age. In this study, it was hypothesized that chickens with high levels of MBL (H-type) may be less prone to disease caused by E. coli infection than chickens with low levels of MBL (L-type) after attempts were made to immunosuppress the chickens by immunization with a live attenuated infectious bursal disease virus (IBDV) vaccine strain. The H-type and L-type chickens were divided into 4 groups receiving either no treatment (I-E-), E. coli alone (I-E+), IBDV alone (I+E-), or IBDV and E. coli (I+E+). Body weight gain was depressed by IBDV immunization as well as E. coli inoculation. The depression of BW gain was significantly larger in L-type chickens compared with H-type chickens. The antibody response to E. coli was significantly depressed by IBDV vaccination and antibody titers to E. coli were elevated by experimental E. coli inoculation, but only in the group not given IBDV (I-E- vs. I-E+). On d 28, T-cell responses in L-type chickens showed a lower percentage of proliferating CD4+ and CD8+ T cells compared with the H-type, regardless of treatment. In conclusion, immune reactions toward infections with E. coli differed between chickens having different basal serum MBL levels, and as such, MBL may be of importance for future selection of more

  10. Native Darag Chicken Menu Variations: Its Acceptability

    Directory of Open Access Journals (Sweden)

    Dr. Rosario Clarabel C. Contreras

    2014-06-01

    Full Text Available Traditional native chicken delicacies like lechon and adobo are very common dishes in a rural Filipino folks’ dining table. As the family economic standing improves, meat becomes a main item in a family diet, dishes like fried chicken and chicken nuggets have also become part of the family choices of chicken dishes in their meal. Intensification of the production of native Darag chicken would lead to optimization of food technological output for the university which will hopefully be a potential one town-one product (OTOP of the municipality.

  11. Stochastic oscillations induced by vortex shedding in wind

    DEFF Research Database (Denmark)

    Christensen, Claus

    1997-01-01

    As a fluid flows past a circular cylinder,vortices are shed alternately from each side at most values of the Reynolds number. Over a certain range of windspeeds, the periodicity in the wake is synchronized or captured by the mechanical system. The shedding abruptly deviates from the linear Strouh...

  12. Acetylsalicylic Acid Treatment Improves Differentiation and Immunomodulation of SHED

    OpenAIRE

    Liu, Y; Chen, C.; Liu, S.; Liu, D.; Xu, X.; Chen, X.; Shi, S

    2015-01-01

    Stem cells from exfoliated deciduous teeth (SHED) possess multipotent differentiation and immunomodulatory properties. They have been used for orofacial bone regeneration and autoimmune disease treatment. In this study, we show that acetylsalicylic acid (ASA) treatment is able to significantly improve SHED-mediated osteogenic differentiation and immunomodulation. Mechanistically, ASA treatment upregulates the telomerase reverse transcriptase (TERT)/Wnt/β-catenin cascade, leading to improvemen...

  13. ESR dosimetry of irradiated chicken legs and chicken eggs

    Energy Technology Data Exchange (ETDEWEB)

    Onori, S.; Pantaloni, M. [Istituto Superiore di Sanita, Rome (Italy). Lab. di Fisica

    1996-12-31

    Ionising radiation induces stable free radicals in chicken bones and in the shell of chicken eggs which can be detected, by the electrons spin resonance (ESR) technique, well beyond the shelf-life of the food and can be used for dosimetry. The method usually adopted to evaluate ``a posteriori`` the dose given during the ionising radiation treatment of food, is the dose additive method. To assess the dose, the ESR signal amplitude of the irradiated food (bone or egg shell in the present case) is measured and then the dose-effect relationship is obtained by re-irradiating the sample with some additive doses (usually of 1 kGy). The dose-effect curve is back-extrapolated and the initial given dose determined. At the Istituto Superiore di Sanita (ISS), Rome, Italy, a research programme was approved two years ago aimed to, (1) study new methodological approaches for ESR dose assessment, and (2) analyse the factors which may influence the ESR readout of irradiated chicken bones and chicken egg shells. (author).

  14. Multiagent-Based Distributed Load Shedding for Islanded Microgrids

    Directory of Open Access Journals (Sweden)

    Xi Wu

    2014-09-01

    Full Text Available This paper addresses a multiagent-based distributed load shedding scheme to restore frequency for the microgrids during islanded operation. The objective of the proposed scheme is to realize a distributed load shedding considering its associated cost and the capacity of the flexible loads. There are two advantages of the proposed scheme: (1 it is a distributed scheme using average-consensus theorem, which can discover the global information when only communications between immediate neighboring agents are used, moreover it can meet the requirements of plug-and-play operations more easily than a centralized scheme; (2 it is a new adaptive load shedding through the comprehensive weights which take into accounts the cost of load shedding and the capacity of flexible loads, these comprehensive weights are evaluated locally by making use of the adaptability and intelligence characteristics of agents. Simulation results in power systems computer aided design (PSCAD illustrate the validity and adaptability of the proposed load shedding scheme.

  15. Acetylsalicylic acid treatment improves differentiation and immunomodulation of SHED.

    Science.gov (United States)

    Liu, Y; Chen, C; Liu, S; Liu, D; Xu, X; Chen, X; Shi, S

    2015-01-01

    Stem cells from exfoliated deciduous teeth (SHED) possess multipotent differentiation and immunomodulatory properties. They have been used for orofacial bone regeneration and autoimmune disease treatment. In this study, we show that acetylsalicylic acid (ASA) treatment is able to significantly improve SHED-mediated osteogenic differentiation and immunomodulation. Mechanistically, ASA treatment upregulates the telomerase reverse transcriptase (TERT)/Wnt/β-catenin cascade, leading to improvement of SHED-mediated bone regeneration, and also upregulates TERT/FASL signaling, leading to improvement of SHED-mediated T-cell apoptosis and ameliorating disease phenotypes in dextran sodium sulfate-induced colitis mice. These data indicate that ASA treatment is a practical approach to improving SHED-based cell therapy. © International & American Associations for Dental Research 2014.

  16. Molecular survey of enteric viruses in commercial chicken farms in Korea with a history of enteritis.

    Science.gov (United States)

    Koo, B S; Lee, H R; Jeon, E O; Han, M S; Min, K C; Lee, S B; Mo, I P

    2013-11-01

    Several enteric viruses have increasingly received attention as potential causative agents of runting-stunting syndrome (RSS) in chickens. A molecular survey was performed to determine the presence of a broad range of enteric viruses, namely chicken astrovirus (CAstV), avian nephritis virus (ANV), chicken parvovirus (ChPV), infectious bronchitis virus (IBV), avian rotavirus (AvRV), avian reovirus (ARV), and fowl adenovirus (FAdV), in intestinal samples derived from 34 commercial chicken flocks that experienced enteritis outbreaks between 2010 and 2012. Using techniques such as PCR and reverse-transcription PCR, enteric viruses were identified in a total of 85.3% of investigated commercial chicken flocks in Korea. Furthermore, diverse combinations of 2 or more enteric viruses were simultaneously identified in 51.7% of chicken farms positive for enteric viruses. The rank order of positivity for enteric viruses was as follows: ANV (44.1%), CAstV (38.2%), ChPV (26.5%), IBV (20.6%), ARV (8.8%), AvRV (5.9%), and FAdV (2.9%). Additionally, other pathogens such as Escherichia coli, Salmonella spp., Eimeria spp., and FAdV were detected in 79% of chicken flocks positive for enteric viruses using PCR, bacterial isolation, and microscopic examination. The results of our study indicate the presence of several enteric viruses with various combinations in commercial chicken farms that experienced enteritis outbreaks. Experimental studies are required to further understand the roles of enteric viruses in RSS in commercial chickens.

  17. Shedding New Light on Environmental Science

    Science.gov (United States)

    Brown, , Jr.

    1996-05-01

    contaminants1 have shed new light on their speciation and the way they bond to environmental particles. This information is important for understanding the reactive transport of metal ions in groundwater. Our XSW and PES studies of metal oxide surfaces2 have provided fundamental insights on the chemical reactions of water and metal adsorbates with these surfaces. * Supported by the National Science Foundation and the Department of Energy 1 Collaborations with J.R. Bargar, S.-F. Cheah, A.L.Foster, G.A. Parks, M.L.Peterson, I. Pickering, T. Tokunaga, S.N. Towle. 2 Collaborations with T. Kendelewicz, P. Liu, W. Spicer

  18. Response of Triatoma infestans to pour-on cypermethrin applied to chickens under laboratory conditions

    Directory of Open Access Journals (Sweden)

    Ivana Amelotti

    2009-05-01

    Full Text Available This article reports the effects of a pour-on formulation of cypermethrin (6% active ingredient applied to chickens exposed to Triatoma infestans, the main vector of Chagas disease in rural houses of the Gran Chaco Region of South America. This study was designed as a completely random experiment with three experimental groups and five replicates. Third instar nymphs were fed on chickens treated with 0, 1 and 2 cc of the formulation. Nymphs were allowed to feed on the chickens at different time intervals after the insecticide application. Third-instar nymphs fed on treated chickens showed a higher mortality, took less blood during feeding and had a lower moulting rate. The mortality rate was highest seven days after the insecticide solution application and blood intake was affected until 30 days after the application of the solution.

  19. Zinc Supplementation against Eimeria acervulina-Induced Oxidative Damage in Broiler Chickens

    Directory of Open Access Journals (Sweden)

    Nedyalka V. Georgieva

    2011-01-01

    Full Text Available This study was undertaken to determine the dietary supplements of Zn containing diet on the antioxidant status in chickens experimentally infected with Eimeria acervulina. The antioxidant status was monitored via determination of MDA concentrations and erythrocyte SOD and CAT activities, as well as vitamin E, vitamin C, Cu, and Zn in liver, muscle, and serum. The results showed increased MDA (<.05, CAT (<.001, and decreased SOD (<.001 in the infected birds. Significant changes in Cu and Zn concentrations and dramatically reduction of vitamin C and E concentrations in the infected chickens were found. The observed deviations in the studied enzymes and nonenzymatic parameters evidence the occurrence of oxidative stress following the infection and impaired antioxidant status of chickens, infected with Eimeria acervulina. Our results proved the ameliorating role of CuZn(OH3Cl (0.170 g per kg food against Eimeria acervulina-induced oxidative damage in infected chickens.

  20. Amino acid substitutions in PB1 of avian influenza viruses influence pathogenicity and transmissibility in chickens.

    Science.gov (United States)

    Suzuki, Yasushi; Uchida, Yuko; Tanikawa, Taichiro; Maeda, Naohiro; Takemae, Nobuhiro; Saito, Takehiko

    2014-10-01

    Amino acid substitutions were introduced into avian influenza virus PB1 in order to characterize the interaction between polymerase activity and pathogenicity. Previously, we used recombinant viruses containing the hemagglutinin (HA) and neuraminidase (NA) genes from the highly pathogenic avian influenza virus (HPAIV) H5N1 strain and other internal genes from two low-pathogenicity avian influenza viruses isolated from chicken and wild-bird hosts (LP and WB, respectively) to demonstrate that the pathogenicity of highly pathogenic avian influenza viruses (HPAIVs) of subtype H5N1 in chickens is regulated by the PB1 gene (Y. Uchida et al., J. Virol. 86:2686-2695, 2012, doi:http://dx.doi.org/10.1128/JVI.06374-11). In the present study, we introduced a C38Y substitution into WB PB1 and demonstrated that this substitution increased both polymerase activity in DF-1 cells in vitro and the pathogenicity of the recombinant viruses in chickens. The V14A substitution in LP PB1 reduced polymerase activity but did not affect pathogenicity in chickens. Interestingly, the V14A substitution reduced viral shedding and transmissibility. These studies demonstrate that increased polymerase activity correlates directly with enhanced pathogenicity, while decreased polymerase activity does not always correlate with pathogenicity and requires further analysis. We identified 2 novel amino acid substitutions in the avian influenza virus PB1 gene that affect the characteristics of highly pathogenic avian influenza viruses (HPAIVs) of the H5N1 subtype, such as viral replication and polymerase activity in vitro and pathogenicity and transmissibly in chickens. An amino acid substitution at residue 38 in PB1 directly affected pathogenicity in chickens and was associated with changes in polymerase activity in vitro. A substitution at residue 14 reduced polymerase activity in vitro, while its effects on pathogenicity and transmissibility depended on the constellation of internal genes. Copyright

  1. A vortex-shedding flowmeter based on IPMCs

    Science.gov (United States)

    Di Pasquale, Giovanna; Graziani, Salvatore; Pollicino, Antonino; Strazzeri, Salvatore

    2016-01-01

    Ionic polymer-metal composites (IPMCs) are electroactive polymers that can be used both as sensors and actuators. They have been demonstrated for many potential applications, in wet and underwater environments. Applications in fields such as biomimetics, robotics, and aerospace, just to mention a few, have been proposed. In this paper, the sensing nature of IPMCs is used to develop a flowmeter based on the vortex shedding phenomenon. The system is described, and a model is proposed and verified. A setup has been realized, and data have been acquired for many working conditions. The performance of the sensing system has been investigated by using acquired experimental data. Water flux velocities in the range [0.38, 2.83] m s-1 have been investigated. This working range is comparable with ranges claimed for established technologies. Results show the suitability of the proposed system to work as a flowmeter. The proposed transducer is suitable for envisaged post-silicon applications, where the use of IPMCs gives the opportunity to realize a new generating polymeric flowmeter. This has potential applications in fields where properties of IPMCs such as low cost, usability, and disposability are relevant.

  2. Sex-related differences in hemato-biochemical indices of adult Vanaraja chickens during summer and winter seasons

    Directory of Open Access Journals (Sweden)

    Kuldeep Kumar Panigrahy

    2017-02-01

    Full Text Available Aim: The objective of this study was to evaluate the changes in hemato-biochemical indices in male and female Vanaraja chickens under tropical environment during summer and winter season. Materials and Methods: A total of 120 day-old sexed Vanaraja chicks were selected as experimental chickens and distributed equally in two groups having 60 female and 60 male chickens in each group, respectively. The experiment was continued for 8 weeks (56 days and both male and female chickens were slaughtered by cervical dislocation method. All parameters were estimated at the end of the experiment in both seasons. Results: Male had higher blood glucose, Ca and P level. Blood glucose level significantly (p0.05 effect in most of the observed parameters. Hence, Vanaraja chickens are adaptable to local tropical climate and can be reared efficiently as backyard poultry.

  3. Ascaridia galli infection influences the development of both humoral and cell-mediated immunity after Newcastle Disease vaccination in chickens

    DEFF Research Database (Denmark)

    Pleidrup, Janne; Dalgaard, Tina S.; Norup, Liselotte R.

    2014-01-01

    blood three weeks after the first ND vaccination as compared to non-parasitized chickens. Finally, A. galli significantly increased local mRNA expression of IL-4 and IL-13 and significantly decreased TGF-ß4 expression in the jejunum two weeks after infection with A. galli. At the time of vaccination......Potent vaccine efficiency is crucial for disease control in both human and livestock vaccination programmes. Free range chickens and chickens with access to outdoor areas have a high risk of infection with parasites including Ascaridia galli, a gastrointestinal nematode with a potential influence...... on the immunological response to vaccination against other infectious diseases. The purpose of this study was to investigate whether A. galli infection influences vaccine-induced immunity to Newcastle Disease (ND) in chickens from an MHC-characterized inbred line. Chickens were experimentally infected with A. galli...

  4. Chicken from Farm to Table

    Science.gov (United States)

    ... Canned Chicken Products 2 to 5 years in pantry Do not freeze in can. [ Top of Page ] ... Contact Us Ask Karen askFSIS En Español FSIS Home | USDA.gov | FoodSafety.gov | USA.gov | Whitehouse.gov | ...

  5. Vaccination of chickens against Campylobacter

    NARCIS (Netherlands)

    Zoete, de M.R.; Putten, J.P.M.; Wagenaar, J.A.

    2007-01-01

    The Gram-negative bacterium Campylobacter is the leading cause of bacterial entero-colitis in humans and is associated with the occurrence of life-threatening auto-immune based neurological disorders. Chickens, which are often heavily colonized with Campylobacter without signs of pathology, are

  6. Large-Eddy Simulation of turbulent vortex shedding

    Energy Technology Data Exchange (ETDEWEB)

    Archambeau, F

    1995-06-01

    This thesis documents the development and application of a computational algorithm for Large-Eddy Simulation. Unusually, the method adopts a fully collocated variable storage arrangement and is applicable to complex, non-rectilinear geometries. A Reynolds-averaged Navier-Stokes algorithm has formed the starting point of the development, but has been modified substantially: the spatial approximation of convection is effected by an energy-conserving central-differencing scheme; a second-order time-marching Adams-Bashforth scheme has been introduced; the pressure field is determined by solving the pressure-Poisson equation; this equation is solved either by use of preconditioned Conjugate-Gradient methods or with the Generalised Minimum Residual method; two types of sub-grid scale models have been introduced and examined. The algorithm has been validated by reference to a hierarchy of unsteady flows of increasing complexity starting with unsteady lid-driven cavity flows and ending with 3-D turbulent vortex shedding behind a square prism. In the latter case, for which extensive experimental data are available, special emphasis has been put on examining the dependence of the results on mesh density, near-wall treatment and the nature of the sub-grid-scale model, one of which is an advanced dynamic model. The LES scheme is shown to return time-average and phase-averaged results which agree well with experimental data and which support the view that LES is a promising approach for unsteady flows dominated by large periodic structures. (author) 87 refs.

  7. Native Chicken Production in Indonesia: A Review

    Directory of Open Access Journals (Sweden)

    C. Hidayat

    2015-02-01

    Full Text Available Indonesia is a country rich in native chicken genetic resources. There are 31 native chicken breed in Indonesia. Native chicken farming was developed for decades. In early period of 1907’s, mostly farmers reared their native chicken by traditional system (about 80%. In 1980s until now, the number of native chicken farmers which rear native chicken by semi intensive and intensive system have been increasing. These rearing system changing have significantly increased the native chicken productivity. The major constraints for the development of native chicken i.e. low growth rate, risks of high mortality, low egg production. Many research results stated that improving in breeding, feeding and management aspect will increase native chicken production. The information and data contained in this paper is the result of study literature for scientific papers, either in the form of journals, books, or proceedings, and livestock statistics books. This paper is made to support the development of native chickens in Indonesia.

  8. Biosafety evaluation of bacteriophages for treatment of diarrhea due to intestinal pathogen Escherichia coli 3-2 infection of chickens.

    Science.gov (United States)

    Li, Hao; Ma, Man-Li; Xie, Hui-Jun; Kong, Jian

    2012-01-01

    Intestinal Escherichia coli caused diarrhea in chicken makes serious damage directly to the chicken culture industry. Bacteriophage therapy is able to control the diarrhea in chickens effectively. In this study, the biosafety of bacteriophages was evaluated for treating intestinal pathogenic E. coli, which induced diarrhea in chickens. Ten bacteriophages were isolated from feces of chickens with diarrhea using the ill-chicken intestinal pathogenic E. coli 3-2 as target organism. Three bacteriophages propagated on E. coli 3-2 with relative big and clear plaques were selected and used together for toxicity experiment and evaluating the effect of therapy on chicken weight gain. In 3 weeks of trial, no mice given with or without mixed bacteriophages died, and the weight of mice of the experimental group did not show significant difference to the control group after 3 weeks infection. Besides remarkable decreasing the death rate of chickens with diarrhea, treatment of mixed bacteriophages also promoted the weight gain and saved the diet consumption as the utilize rate of diet increased 11% compared with the control group. These observations indicated that a mixture of three bacteriophages would be biosafe for rapid and effective preventing pathogenic E. coli infections.

  9. A quantitative trait locus for a primary antibody response to keyhole limpet hemocyanin on chicken chromosome 14-Confirmation and candidate gene approach

    NARCIS (Netherlands)

    Siwek, M.; Slawinska, A.; Nieuwland, M.G.B.; Witkowski, A.; Zieba, G.; Minozzi, G.; Knol, E.F.; Bednarczyk, M.

    2010-01-01

    A QTL involved in the primary antibody response toward keyhole limpet hemocyanin (KLH) was detected on chicken chromosome 14 in the experimental population, which was created by crossing commercial White Leghorn and a Polish native chicken breed (green-legged partridgelike). The current QTL location

  10. Study of potential health effects of electromagnetic fields of telephony and Wi-Fi, using chicken embryo development as animal model

    NARCIS (Netherlands)

    Woelders, H.; Wit, de A.A.C.; Lourens, A.; Stockhofe, N.; Engel, B.; Hulsegge, B.; Schokker, D.; Heijningen, van P.; Vossen, S.; Bekers, D.; Zwamborn, P.

    2017-01-01

    The objective of this study is to investigate possible biological effects of radiofrequency electromagnetic fields (RF-EMF) as used in modern wireless telecommunication in a well-controlled experimental environment using chicken embryo development as animal model. Chicken eggs were incubated under

  11. Dehydration curve, fungi and mycotoxins in Tifton 85 hay dehydrated in the field and in shed

    Directory of Open Access Journals (Sweden)

    Loreno Egidio Taffarel

    2013-06-01

    Full Text Available The objective of this study was to estimate the dehydration curve and occurrence of fungi and mycotoxins in Tifton 85 hay. The experimental design was randomized blocks in split plots with four replications and five levels of nitrogen (0, 25, 50, 75 and 100 kg ha-1 in the form of urea, two regrowth ages (28 and 35 days and drying hay in the sun and in shed. After harvesting, the grass was sampled four times (0, 8, 23 and 32 hours to dry in the sun and twelve times (0, 3, 18, 27, 42, 51, 66, 75, 90, 99, 114 and 123 hours for drying in shed, turned over daily. The fungi were identified after seeding and growth in three steps of haymaking (cutting, baling and after 30 days of storage. To verify the presence of mycotoxins, 20 samples, composed of hay stored for 30 days, were collected, of which 10 samples were from sun-dried hay and 10 from hay dried in shed. It took 32 hours to produce hay at field conditions, with water loss rates up to 6.10 g g-1 DM-h during the first 8 hours after cutting. The average loss of water in this period was 2.0 g g-1 DM-h. Hays dried in the shed took 123 hours and the dehydration rates were less than 0.5 g g-1 DM-h due to environmental conditions. There was a predominance of three genera of fungi: Fusarium, Penicillium and Aspergillus. The largest population was the Fusarium, followed by Penicillium, at the steps of baling and storage. The fumonisin mycotoxin was found at a higher concentration and there was no difference in fumonisin concentration in the hay dried in the sun and in shed. Although it brings no hazard to animal health, the production of aflatoxin and zearalenone was significantly higher in the samples of sun-dried hay.

  12. Genomic characterization of recent chicken anemia virus isolates in China

    Science.gov (United States)

    Chicken infectious anemiavirus (CIAV) causes diseases in young chickens, which include increased pathogenicity of secondary infectious agents, generalized lymphoid depletion, and immune-repression. In the present study, we have identified 22 CIAV strains isolated from several commercial chicken farm...

  13. Phytochemicals reduce aflatoxin-induced toxicity in chicken embryos

    Science.gov (United States)

    Aflatoxins (AF) are toxic metabolites produced by molds, Aspergillus flavus and Aspergillus parasicitus, which frequently contaminate chicken feed ingredients. Ingestion of AF-contaminated feed by chickens leads to deleterious effects, including decreased chicken performance and reduced egg producti...

  14. Ultrastructural changes in the developing chicken cornea following caffeine administration.

    Directory of Open Access Journals (Sweden)

    Bartel Hieronim

    2010-11-01

    Full Text Available Caffeine is one of the most frequently consumed psychoactive substances. It has been known for many years that caffeine at high concentrations exerts harmful effects on both women's and laboratory animals' fertility, moreover it may impair normal development of many organs in the prenatal period. So far there have been few studies performed that demonstrate teratogenic effects of caffeine on structures of the developing eye, particularly the cornea. The aim of the study was to show ultrastructural changes in the developing cornea, as the effect of caffeine administration to chicken embryos. The experimental materials were 26 chicken embryos from incubated breeding eggs. Eggs were divided into two groups: control (n=30 in which Ringer liquid was administrated, and experimental (n=30 in which teratogenic dose of caffeine 3.5mg/egg was given. In 36th hour of incubation solutions were given with cannula through hole in an egg shell directly onto amniotic membrane. After closing the hole with a glass plate and paraffine, eggs were put back to incubator. In 10th and 19th day of incubation corneas were taken for morphological analysis with a use of electron microscopy. Administration of caffeine during chicken development causes changes of collagen fibers of Bowman's membrane patterns and of the corneal stroma but it also changes proportion of amount of collagen fibers and of the stromal cells.

  15. POLYMORPHISMS OF GROWTH HORMONE GENE IN HARINGHATA BLACK CHICKEN

    Directory of Open Access Journals (Sweden)

    R. Saikhom

    2017-06-01

    Full Text Available The present study was carried out with an aim to investigate the genetic variability of growth hormone gene in Haringhata Black chicken. Blood samples were collected from 82 experimental birds and genomic DNA was extracted using the modified high salt method. Amplification of specific DNA fragment of intron 4 of growth hormone gene yielded a product size of 713 bp and was analyzed for polymorphism using PCR-SSCP technique. The banding pattern of present investigation revealed two SSCP variants AA and BB genotype in all experimental birds. In the analysed flock of Haringhata Black Chicken, the genotype frequencies were found to be 0.915 for AA and 0.085 for BB genotype. The frequencies of A and B alleles were 0.915 and 0.085 respectively which indicated A allele was predominant in the studied Haringhata Black Chicken population of the farm. The Chi Square Test revealed that studied population was not in accordance with Hardy Weinberg equilibrium with respect to intron 4 of Growth hormone gene.

  16. Marketing researcher sheds new light on rewards programs

    OpenAIRE

    Ho, Sookhan

    2010-01-01

    A new study by Rajesh Bagchi, assistant professor of marketing in the Pamplin College of Business, sheds new light on loyalty or rewards programs, used by airlines, hotels, and other businesses to promote customer allegiance.

  17. Study of Composite Insulator Sheds Subjected to Wheel Test

    OpenAIRE

    Mackiewicz M.; Mikulski J.L.; Wańkowicz J.; Kucharski S.; Ranachowski P.; Ranachowski Z.

    2017-01-01

    The paper presents investigation of the properties of the surface and the material stiffness – flexibility of series of samples taken from the sheds of the composite insulators. The insulators were previously subjected to wheel test. The wheel test and 1000 h salt fog test are regarded as alternative examination of the material resistance to the effects of electrical surface discharges. There were investigated two series of the samples of the composite insulators sheds. Examined specimens, ma...

  18. The Design of Embedded Video Supervision System of Vegetable Shed

    Science.gov (United States)

    Sun, Jun; Liang, Mingxing; Chen, Weijun; Zhang, Bin

    In order to reinforce the measure of vegetable shed's safety, the S3C44B0X is taken as the main processor chip. The embedded hardware platform is built with a few outer-ring chips, and the network server is structured under the Linux embedded environment, and MPEG4 compression and real time transmission are carried on. The experiment indicates that the video monitoring system can guarantee good effect, which can be applied to the safety of vegetable sheds.

  19. A Numerical Study of Loop Current Intrusions and Eddy Shedding.

    Science.gov (United States)

    1980-06-20

    subsequently eddy shedding. The second is that the Campeche Bank blocks the westward spreading of the Loop and also inhibits the eddy shedding process...One experiment to test these hypotheses involved totally removing both the Campeche Bank and the bottom slope on inflow. Figure 27a shows the modified...26b). Clearly, neither the bottom slope on inflow nor the Campeche Bank topography are responsible for this I steady regime. At the beginning of year

  20. Infectivity of different genotypes of human Blastocystis hominis isolates in chickens and rats.

    Science.gov (United States)

    Iguchi, Aya; Ebisu, Akiko; Nagata, Satiko; Saitou, Yumie; Yoshikawa, Hisao; Iwatani, Satoru; Kimata, Isao

    2007-06-01

    Most Blastocystis hominis isolates from humans are believed to be potentially zoonotic. This is because B. hominis isolates found in a variety of other host species have been found to have identical or relatively similar genotypes to those found in human isolates. However, the transmission of human B. hominis isolates to other animals has not been confirmed experimentally. In this study, the infectivity associated with several unique human Blastocystis genotypes (subtypes 2, 3, 4 and 7) was therefore investigated by infecting chickens and rats with two isolates of each subtype experimentally. The results showed that one isolate of subtype 4 and one isolate of subtype 7 was capable of infecting both chickens and rats, while two isolates of subtype 2, another isolate of subtype 4, and another isolate of subtype 7 could only infect chickens. Conversely, two isolates of subtype 3 failed to infect either of the animals. These results confirmed that several genotypes from human isolates could infect chickens and/or rats, indicating that chickens and rats are suitable experimental animal models for studying the zoonotic potential of human Blastocystis isolates.

  1. Oxidative stability of chicken thigh meat after treatment of fennel and savory essential oils

    Directory of Open Access Journals (Sweden)

    Adriana Pavelková

    2016-05-01

    Full Text Available In the present work, the effect of the fennel and savory essential oils on oxidative stability of chicken thigh muscles during chilled storage was investigated. In the experiment were used chickens of hybrid combination Cobb 500 after 42 days of the fattening period. The obtained fresh chicken thigh with skin from left half-carcass were divided into five groups (n = 5: C - control air-packaged group; A1 - vacuum-packaged experimental group; A2 - vacuum-packaged experimental group with EDTA solution 1.50% w/w; A3 - vacuum-packaged experimental group with fennel (Foeniculum vulgare essential oil at concentrations 0.2% v/w and A4 - vacuum-packaged experimental group with savory (Satureja hortensis essential oil at concentration 0.2% v/w. The essential oils were applicate on surface chicken thighs. The chicken thighs were packaged using a vacuum packaging machine and stored in refrigerate at                 4 ±0.5 °C. The value of thiobarbituric acid (TBA expressed as amount of malondialdehyde (MDA in 1 kg sample was measured during storage in 1st, 4th, 8th, 12th and 16th day. The treatments of chicken thighs with fennel and savory essential oils show statistically significant differences between all testing groups and control group, where higher average value of MDA measured in thigh muscle of broiler chickens was in samples of control group                 (0.359 mg.kg-1 compared to experimental groups A1 (0.129 mg.kg-1, A2 (0.091 mg.kg-1, A3 (0.084 mg.kg-1 and A4 (0.089 mg.kg-1 after 16-day of chilled storage. Experiment results show that the treatment of chicken thigh with fennel and savory essential oils had positive influence on the reduction of oxidative processes in thigh muscles during chilling storage and use of essential oil is one of the options increase shelf life of fresh chicken meat.

  2. Apollo II - Thermal use of chicken droppings - Phase II; Apollo II - Thermische Nutzung von Huehnermist, Phase II

    Energy Technology Data Exchange (ETDEWEB)

    Salerno, B. [Salerno Engeler GmbH, Langenbruck (Switzerland); Hersener, J.L. [Ing. Buero Hersener, Wiesendangen (Switzerland); Dinkel, F. [Carbotech AG, Basel (Switzerland)

    2001-07-01

    This report made for the Swiss Federal Office of Energy (SFOE) discusses the conception, planning and construction of an easy-to-operate pilot heating plant that uses chicken litter as its fuel. The plant, which is installed at a chicken farm in Boesingen, Switzerland, produces 250 - 350 kW and not only supplies heat for two chicken sheds and two households, but also provides energy for a drying plant in summer. The results of measurements made on emissions are discussed and, within the framework of an eco-balance analysis, comparisons are made between the direct use of the droppings as manure or as a fuel. The cost-effectiveness of the plant is examined and the influence of plant size and other factors discussed. Further, legal questions concerning the use of chicken litter as a fuel for heating installations are discussed; the use of the droppings as a fuel is not foreseen in the legislation concerning water protection and airborne emissions of pollutants. Although normally this type of plant is built at the same location as the chicken farms, questions on logistics are also looked at.

  3. Immortalization of chicken preadipocytes by retroviral transduction of chicken TERT and TR.

    Directory of Open Access Journals (Sweden)

    Wei Wang

    Full Text Available The chicken is an important agricultural animal and model for developmental biology, immunology and virology. Excess fat accumulation continues to be a serious problem for the chicken industry. However, chicken adipogenesis and obesity have not been well investigated, because no chicken preadipocyte cell lines have been generated thus far. Here, we successfully generated two immortalized chicken preadipocyte cell lines through transduction of either chicken telomerase reverse transcriptase (chTERT alone or in combination with chicken telomerase RNA (chTR. Both of these cell lines have survived >100 population doublings in vitro, display high telomerase activity and have no sign of replicative senescence. Similar to primary chicken preadipocytes, these two cell lines display a fibroblast-like morphology, retain the capacity to differentiate into adipocytes, and do not display any signs of malignant transformation. Isoenzyme analysis and PCR-based analysis confirmed that these two cell lines are of chicken origin and are free from inter-species contamination. To our knowledge, this is the first report demonstrating the generation of immortal chicken cells by introduction of chTERT and chTR. Our established chicken preadipocyte cell lines show great promise as an in vitro model for the investigation of chicken adipogenesis, lipid metabolism, and obesity and its related diseases, and our results also provide clues for immortalizing other avian cell types.

  4. Counter and Complicit Masculine Discourse Among Men's Shed Members.

    Science.gov (United States)

    Mackenzie, Corey S; Roger, Kerstin; Robertson, Steve; Oliffe, John L; Nurmi, Mary Anne; Urquhart, James

    2017-07-01

    Men's Sheds is a growing international movement aimed at providing men with places and activities that facilitate social connectedness. Despite Men's Sheds' focus on males, little attention has been paid to masculinities within the specific context of these settings. The current study used a gender relations framework to explore the ways in which attendees discussed Men's Sheds, with particular attention to discussions that were complicit and counter to traditional, hegemonic views of masculinity, and diverse positions in between these binaries. The data consisted of transcripts and field notes from four focus groups comprising mostly older, White, retired male members of a Canadian shed ( N = 22). The analysis revealed three overall themes: (1) focus on work, (2) independence, and (3) need for male-focused spaces. These themes and associated subthemes suggest that shed members ascribe to dominant masculine values and ideals, but also support more fluid and flexible views of masculinity. Implications are discussed for how working with an array of masculinities within the Men's Sheds movement will be helpful with respect to their future growth in Canada and internationally.

  5. Study of Composite Insulator Sheds Subjected to Wheel Test

    Directory of Open Access Journals (Sweden)

    Mackiewicz M.

    2017-06-01

    Full Text Available The paper presents investigation of the properties of the surface and the material stiffness – flexibility of series of samples taken from the sheds of the composite insulators. The insulators were previously subjected to wheel test. The wheel test and 1000 h salt fog test are regarded as alternative examination of the material resistance to the effects of electrical surface discharges. There were investigated two series of the samples of the composite insulators sheds. Examined specimens, made of HTV silicone rubber, were taken from the sheds of medium-voltage composite insulators of two different manufacturers. Insulators of both types passed the 1000 h salt fog test without reservation. Meanwhile, the wheel test can provide a basis for better distinguishing between physical properties of the tested materials. In the case of the insulators of one of the manufacturers the wheel test result was negative. Cross puncture effect of the sheds took place in several places. In addition, sheds were covered with dark coating of varying thicknesses. The results of the study indicated a significantly stronger influence of electrical and temperature factors on the sheds under investigations during the wheel test than in the case of the 1000 h salt fog test. It can be stated that these tests cannot be considered as alternative and it seems that wheel test enables better distinguishing between properties of the materials.

  6. The Effect of Microbial Phytase on Broiler Chicken Production and Nutritional Quality of Meat

    Directory of Open Access Journals (Sweden)

    Martin Kliment

    2012-05-01

    Full Text Available We carried out an experiment using chickens producig meat Cobb 500 form 1 to 42 days of age and microbial 6-phytase. The aim of study was to determinate the impact of microbial 6-phytase on the quality of broiler chickens production. In our experiment were used standard soybean-cereal feed mixtures. The content of the nutrients and metabolizable energy was balanced in control group in terms of the broiler chickens physiological needs. In experimental feed mixtures was reduced phosphorus content through the feed addition of dicalcium phosphate about 37.7% in starter, about 35% in grower and about 35.14% in finisher of the sdandardized physiological needs for broiler chickens. A body weight of chickens aged 42 days was 2302.0 g compared with 2197.0 g of the broiler chickens of the control group with not statistically significant difference (P>0.05. Feed conversion was 1.69 versus 1.71 of the control group. Crude protein content of breast muscle was 23.52 g per 100 g compared with 23.36 g per 100 g of the control group with not statistically significant difference (P>0.05. Crude protein content in the thigh muscle was 18.33 g per 100 g compared with 18.20 g per 100 g of the control group with not statistically significant difference (P>0.05.

  7. Derivation of keratinocytes from chicken embryonic stem cells: Establishment and characterization of differentiated proliferative cell populations

    Directory of Open Access Journals (Sweden)

    Mathilde Couteaudier

    2015-03-01

    Full Text Available A common challenge in avian cell biology is the generation of differentiated cell-lines, especially in the keratinocyte lineage. Only a few avian cell-lines are available and very few of them show an interesting differentiation profile. During the last decade, mammalian embryonic stem cell-lines were shown to differentiate into almost all lineages, including keratinocytes. Although chicken embryonic stem cells had been obtained in the 1990s, few differentiation studies toward the ectodermal lineage were reported. Consequently, we explored the differentiation of chicken embryonic stem cells toward the keratinocyte lineage by using a combination of stromal induction, ascorbic acid, BMP4 and chicken serum. During the induction period, we observed a downregulation of pluripotency markers and an upregulation of epidermal markers. Three homogenous cell populations were derived, which were morphologically similar to chicken primary keratinocytes, displaying intracellular lipid droplets in almost every pavimentous cell. These cells could be serially passaged without alteration of their morphology and showed gene and protein expression profiles of epidermal markers similar to chicken primary keratinocytes. These cells represent an alternative to the isolation of chicken primary keratinocytes, being less cumbersome to handle and reducing the number of experimental animals used for the preparation of primary cells.

  8. DNA microarray global gene expression analysis of influenza virus-infected chicken and duck cells

    Directory of Open Access Journals (Sweden)

    Suresh V. Kuchipudi

    2015-06-01

    Full Text Available The data described in this article pertain to the article by Kuchipudi et al. (2014 titled “Highly Pathogenic Avian Influenza Virus Infection in Chickens But Not Ducks Is Associated with Elevated Host Immune and Pro-inflammatory Responses” [1]. While infection of chickens with highly pathogenic avian influenza (HPAI H5N1 virus subtypes often leads to 100% mortality within 1 to 2 days, infection of ducks in contrast causes mild or no clinical signs. The rapid onset of fatal disease in chickens, but with no evidence of severe clinical symptoms in ducks, suggests underlying differences in their innate immune mechanisms. We used Chicken Genechip microarrays (Affymetrix to analyse the gene expression profiles of primary chicken and duck lung cells infected with a low pathogenic avian influenza (LPAI H2N3 virus and two HPAI H5N1 virus subtypes to understand the molecular basis of host susceptibility and resistance in chickens and ducks. Here, we described the experimental design, quality control and analysis that were performed on the data set. The data are publicly available through the Gene Expression Omnibus (GEOdatabase with accession number GSE33389, and the analysis and interpretation of these data are included in Kuchipudi et al. (2014 [1].

  9. Acoustically levitated dancing drops: Self-excited oscillation to chaotic shedding

    Science.gov (United States)

    Lin, Po-Cheng; I, Lin

    2016-02-01

    We experimentally demonstrate self-excited oscillation and shedding of millimeter-sized water drops, acoustically levitated in a single-node standing waves cavity, by decreasing the steady acoustic wave intensity below a threshold. The perturbation of the acoustic field by drop motion is a possible source for providing an effective negative damping for sustaining the growing amplitude of the self-excited motion. Its further interplay with surface tension, drop inertia, gravity and acoustic intensities, select various self-excited modes for different size of drops and acoustic intensity. The large drop exhibits quasiperiodic motion from a vertical mode and a zonal mode with growing coupling, as oscillation amplitudes grow, until falling on the floor. For small drops, chaotic oscillations constituted by several broadened sectorial modes and corresponding zonal modes are self-excited. The growing oscillation amplitude leads to droplet shedding from the edges of highly stretched lobes, where surface tension no longer holds the rapid expanding flow.

  10. Consumer Attitudes Toward Storing and Thawing Chicken and Effects of the Common Thawing Practices on Some Quality Characteristics of Frozen Chicken

    Directory of Open Access Journals (Sweden)

    Hakan Benli

    2016-01-01

    Full Text Available In this study, a survey was conducted to both evaluate the consumers’ general attitudes for purchasing and storing the raw chicken and determine the thawing practices used for defrosting frozen chicken at home. About 75% of the consumers indicated purchasing chicken meat at least once a week or more. Furthermore, the majority (82.16% of those who stored at least a portion of the raw chicken stated freezing the raw chicken meat at home. Freezing the chicken meat was considered to have no effect on the quality by 43.49% of the consumers while 56.51% thought that freezing had either negative or positive effects on the quality. The survey study indicated that top five most commonly used thawing practices included thawing on the kitchen counter, thawing in the refrigerator, thawing in the warm water, thawing in the microwave, and thawing under tap water. In addition, an experimental study was conducted to determine the effects of these most commonly used thawing practices on some quality characteristics of the chicken meat including pH, drip loss, cooking loss, color analysis and textural profile analysis. Although, L* value for thawing on the kitchen counter was the lowest, after cooking, none of the thawing treatments have a significant effect on the color values. Thawing in the microwave produced the highest drip loss of 3.47% while the lowest drip loss of 0.62% was observed with thawing in the refrigerator. On the other hand, thawing in the microwave and refrigerator caused the lowest cooking loss values of 18.29% and 18.53%, respectively. Nevertheless, there were no significant differences among textural parameter values of the defrosted and then cooked samples using the home based thawing practices, indicating similar quality characteristics among the samples.

  11. Consumer Attitudes Toward Storing and Thawing Chicken and Effects of the Common Thawing Practices on Some Quality Characteristics of Frozen Chicken.

    Science.gov (United States)

    Benli, Hakan

    2016-01-01

    In this study, a survey was conducted to both evaluate the consumers' general attitudes for purchasing and storing the raw chicken and determine the thawing practices used for defrosting frozen chicken at home. About 75% of the consumers indicated purchasing chicken meat at least once a week or more. Furthermore, the majority (82.16%) of those who stored at least a portion of the raw chicken stated freezing the raw chicken meat at home. Freezing the chicken meat was considered to have no effect on the quality by 43.49% of the consumers while 56.51% thought that freezing had either negative or positive effects on the quality. The survey study indicated that top five most commonly used thawing practices included thawing on the kitchen counter, thawing in the refrigerator, thawing in the warm water, thawing in the microwave, and thawing under tap water. In addition, an experimental study was conducted to determine the effects of these most commonly used thawing practices on some quality characteristics of the chicken meat including pH, drip loss, cooking loss, color analysis and textural profile analysis. Although, L* value for thawing on the kitchen counter was the lowest, after cooking, none of the thawing treatments have a significant effect on the color values. Thawing in the microwave produced the highest drip loss of 3.47% while the lowest drip loss of 0.62% was observed with thawing in the refrigerator. On the other hand, thawing in the microwave and refrigerator caused the lowest cooking loss values of 18.29% and 18.53%, respectively. Nevertheless, there were no significant differences among textural parameter values of the defrosted and then cooked samples using the home based thawing practices, indicating similar quality characteristics among the samples.

  12. CROWING SOUND ANALYSIS OF GAGA??? CHICKEN: LOCAL CHICKEN FROM SOUTH SULAWESI INDONESIA

    OpenAIRE

    Aprilita Bugiwati, Sri Rachma; Ashari, Fachri

    2008-01-01

    Gaga??? chicken was known as a local chicken at South Sulawesi Indonesia which has unique, specific, and different crowing sound, especially at the ending of crowing sound which is like the voice character of human laughing, comparing with the other types of singing chicken in the world. 287 birds of Gaga??? chicken at 3 districts at the centre habitat of Gaga??? chicken were separated into 2 groups (163 birds of Dangdut type and 124 birds of Slow type) which is based on the speed...

  13. Campylobacter jejuni is not merely a commensal in commercial broiler chickens and affects bird welfare.

    Science.gov (United States)

    Humphrey, Suzanne; Chaloner, Gemma; Kemmett, Kirsty; Davidson, Nicola; Williams, Nicola; Kipar, Anja; Humphrey, Tom; Wigley, Paul

    2014-07-01

    Campylobacter jejuni is the leading cause of bacterial food-borne infection; chicken meat is its main source. C. jejuni is considered commensal in chickens based on experimental models unrepresentative of commercial production. Here we show that the paradigm of Campylobacter commensalism in the chicken is flawed. Through experimental infection of four commercial breeds of broiler chickens, we show that breed has a significant effect on C. jejuni infection and the immune response of the animals, although these factors have limited impact on the number of bacteria in chicken ceca. All breeds mounted an innate immune response. In some breeds, this response declined when interleukin-10 was expressed, consistent with regulation of the intestinal inflammatory response, and these birds remained healthy. In another breed, there was a prolonged inflammatory response, evidence of damage to gut mucosa, and diarrhea. We show that bird type has a major impact on infection biology of C. jejuni. In some breeds, infection leads to disease, and the bacterium cannot be considered a harmless commensal. These findings have implications for the welfare of chickens in commercial production where C. jejuni infection is a persistent problem. Importance: Campylobacter jejuni is the most common cause of food-borne bacterial diarrheal disease in the developed world. Chicken is the most common source of infection. C. jejuni infection of chickens had previously not been considered to cause disease, and it was thought that C. jejuni was part of the normal microbiota of birds. In this work, we show that modern rapidly growing chicken breeds used in intensive production systems have a strong inflammatory response to C. jejuni infection that can lead to diarrhea, which, in turn, leads to damage to the feet and legs on the birds due to standing on wet litter. The response and level of disease varied between breeds and is related to regulation of the inflammatory immune response. These findings

  14. Flavour Chemistry of Chicken Meat: A Review

    Directory of Open Access Journals (Sweden)

    Dinesh D. Jayasena

    2013-05-01

    Full Text Available Flavour comprises mainly of taste and aroma and is involved in consumers’ meat-buying behavior and preferences. Chicken meat flavour is supposed to be affected by a number of ante- and post-mortem factors, including breed, diet, post-mortem ageing, method of cooking, etc. Additionally, chicken meat is more susceptible to quality deterioration mainly due to lipid oxidation with resulting off-flavours. Therefore, the intent of this paper is to highlight the mechanisms and chemical compounds responsible for chicken meat flavour and off-flavour development to help producers in producing the most flavourful and consistent product possible. Chicken meat flavour is thermally derived and the Maillard reaction, thermal degradation of lipids, and interaction between these 2 reactions are mainly responsible for the generation of flavour and aroma compounds. The reaction of cysteine and sugar can lead to characteristic meat flavour specially for chicken and pork. Volatile compounds including 2-methyl-3-furanthiol, 2-furfurylthiol, methionol, 2,4,5-trimethyl-thiazole, nonanol, 2-trans-nonenal, and other compounds have been identified as important for the flavour of chicken. However 2-methyl-3-furanthiol is considered as the most vital chemical compound for chicken flavour development. In addition, a large number of heterocyclic compounds are formed when higher temperature and low moisture conditions are used during certain cooking methods of chicken meat such as roasting, grilling, frying or pressure cooking compared to boiled chicken meat. Major volatile compounds responsible for fried chicken are 3,5-dimethyl-1,2,4-trithiolanes, 2,4,6-trimethylperhydro-1,3,5-dithiazines, 3,5-diisobutyl-1,2,4-trithiolane, 3-methyl-5-butyl-1,2,4-trithiolane, 3-methyl-5-pentyl-1,2,4-trithiolane, 2,4-decadienal and trans-4,5-epoxy-trans-2-decenal. Alkylpyrazines were reported in the flavours of fried chicken and roasted chicken but not in chicken broth. The main reason for

  15. The Characteristic and The Use of Pelung Chicken in Indonesia

    Directory of Open Access Journals (Sweden)

    Sofjan Iskandar

    2007-09-01

    Full Text Available Pelung chicken is one of livestock genetic resources in Indonesia, which has been playing an important role for years in the villagers in West Java Province. Pelung chicken originally came from Cianjur district in West Java area. It has been raised as a singing cockerel. This singing ability of the cockerel has become the main criteria for Pelung chicken regular competition in Cianjur. A serious attention on Pelung chicken can maintain the existence of Pelung chicken. The specific character of Pelung chicken compared to other native chicken in Indonesia is the large size of its body. This character could be used to improve the growth rate up to 20% bodyweight and the feed utilization efficiency up to 10% when crossbred with Kampung chicken. The economic value of Pelung chicken is not only its beautiful voice but also as a source of local chicken meat. Further research on any genetic potential of Pelung chicken is strongly suggested.

  16. Production of crispy bread snacks containing chicken meat and chicken meat powder

    Directory of Open Access Journals (Sweden)

    HULYA CAKMAK

    Full Text Available ABSTRACT Chicken meat in two different forms (chicken meat and chicken meat powder were added into white flour and whole wheat blend baguette bread formulations for protein enrichment and finally developing new and healthy snacks. The chicken meat and powder levels were 10% for white flour baguette, and 15% for whole wheat blend. The dried baguette samples were packaged under 100% N2, and physical, chemical, microbiological and sensorial properties were evaluated during 3 months of storage. Protein content of chicken meat powder added samples were found statistically higher than chicken meat added samples. Hardness of the snacks was significantly affected from type of chicken meat, such as values were higher for chicken meat added samples than chicken meat powder added samples. Lipid oxidation of the snacks was determined by TBA analysis, and TBA value for whole wheat mixture snack with 15% of chicken meat was the highest among all during storage. The highest overall acceptance score was obtained from white flour snack with 10% chicken meat. There was no coliform bacteria detected during storage and the results of yeast-mold count and aerobic plate count of snacks remained between the quantitative ranges.

  17. Production of crispy bread snacks containing chicken meat and chicken meat powder.

    Science.gov (United States)

    Cakmak, Hulya; Altinel, Burak; Kumcuoglu, Seher; Kisla, Duygu; Tavman, Sebnem

    2016-01-01

    Chicken meat in two different forms (chicken meat and chicken meat powder) were added into white flour and whole wheat blend baguette bread formulations for protein enrichment and finally developing new and healthy snacks. The chicken meat and powder levels were 10% for white flour baguette, and 15% for whole wheat blend. The dried baguette samples were packaged under 100% N2, and physical, chemical, microbiological and sensorial properties were evaluated during 3 months of storage. Protein content of chicken meat powder added samples were found statistically higher than chicken meat added samples. Hardness of the snacks was significantly affected from type of chicken meat, such as values were higher for chicken meat added samples than chicken meat powder added samples. Lipid oxidation of the snacks was determined by TBA analysis, and TBA value for whole wheat mixture snack with 15% of chicken meat was the highest among all during storage. The highest overall acceptance score was obtained from white flour snack with 10% chicken meat. There was no coliform bacteria detected during storage and the results of yeast-mold count and aerobic plate count of snacks remained between the quantitative ranges.

  18. NaAuS chicken-wire-like semiconductor: Electronic structure and optical properties

    Energy Technology Data Exchange (ETDEWEB)

    Reshak, A.H. [Institute of Complex Systems, FFPW, CENAKVA, University of South Bohemia in CB, Nove Hrady 37333 (Czech Republic); Center of Excellence Geopolymer and Green Technology, School of Material Engineering, University Malaysia Perlis, 01007 Kangar, Perlis (Malaysia); Khan, Saleem Ayaz, E-mail: sayaz_usb@yahoo.com [Institute of Complex Systems, FFPW, CENAKVA, University of South Bohemia in CB, Nove Hrady 37333 (Czech Republic); Kamarudin, H. [Center of Excellence Geopolymer and Green Technology, School of Material Engineering, University Malaysia Perlis, 01007 Kangar, Perlis (Malaysia); Bila, Jiri [Department of Instrumentation and Control Engineering, Faculty of Mechanical Engineering, CTU in Prague, Technicka 4, 166 07 Prague 6 (Czech Republic)

    2014-01-05

    Highlights: • Chicken wire like semiconductor NaAuS was investigated. • Good agreement with experimental data was found. • Electronic charge density of chicken wire like semiconductor NaAuS was obtained. • The calculated uniaxial anisotropy is −0.0005, indicating the strong anisotropy. -- Abstract: The electronic structure, charge density and optical properties of NaAuS a chicken-wire-like semiconductor was calculated using full potential linear augmented plane wave based on density functional theory. The Ceperley-Alder local density approximation, Perdew Becke Ernzerhof Generalized gradient approximation and Engel Voskov Generalized Gradient Approximation were applied to solve the exchange correlation potential. The investigation of band structures and density of states elucidates that Engle Vasko Generalized Gradient Approximation shows close agreement to the experimental data. The calculated valence charge density shows pure ionic nature of Au–Au bond. It becomes partially covalent when Au is connected with two Na atoms. The linear optical susceptibilities of chicken-wire-like NaAuS semiconductor are calculated so as to obtain further insight into the electronic properties. The uniaxial anisotropy is −0.0005, indicating the strong anisotropy of the dielectric function in the NaAuS a chicken-wire-like semiconductor.

  19. Impact of salinomycin on the intestinal microflora of broiler chickens

    Directory of Open Access Journals (Sweden)

    Pedersen Karl

    2007-10-01

    Full Text Available Abstract Background The ionophoric coccidiostat salinomycin is widely used in chicken feed. In the near future the use of ionophore coccidiostats may be banned as has been the case for other antimicrobial growth promoters. This study was conducted to examine the effect of salinomycin on Campylobacter jejuni infection and on the composition of the caecal microflora in broiler chickens. Methods An experimental infection study was carried out in isolators and the intestinal microflora was analyzed using quantitative cultivation, denaturant gradient gel electrophoresis (DGGE, cloning and sequencing. Results We found no effect of salinomycin on C. jejuni but salinomycin significantly affected the composition of the microflora. In addition, salinomycin significantly reduced the prevalence of Clostridium perfringens and we observed a significant increase (62% in the mean body weight of salinomycin treated chickens compared to un-treated controls. Conclusion Termination of the use of ionophore coccidiostats will not affect food safety related to campylobacter, but will increase the risk of necrotic enteritis in the broilers.

  20. Shrimp pond wastewater treatment using pyrolyzed chicken feather as adsorbent

    Science.gov (United States)

    Moon, Wei Chek; Jbara, Mohamad Hasan; Palaniandy, Puganeshwary; Yusoff, Mohd Suffian

    2017-10-01

    In this study, chicken feather fiber was used as a raw material to prepare a non-expensive adsorbent by pyrolysis without chemical activation. The main pollutants treated in this study were chemical oxygen demand (COD) and ammoniacal nitrogen (NH3-N) from shrimp pond wastewater containing high concentrations of nutrients, which caused the eutrophication phenomenon in adjacent water. Batch adsorption studies were performed to investigate the effect of pH (5-8), mass of adsorbent (0.5-3 g), and shaking time (0.5-2 h) on the removal efficiency of COD and NH3- N. Experimental results showed that the optimum conditions were as follows: pH 5, 0.5 g of adsorbent, and 0.5 h of shaking. Under these conditions, 34.01% and 40.47% of COD and NH3-N were removed, respectively, from shrimp pond wastewater. The adsorption processes were best described by the Langmuir isotherm model for COD and NH3-N removal, with maximum monolayer adsorption capacity of 36.9 and 7.24 mg/g for COD and NH3-N, respectively. The results proved that chicken feather could remove COD and NH3-N from shrimp pond wastewater. However, further studies on thermal treatment should be carried out to increase the removal efficiency of pyrolyzed chicken feather fiber.

  1. Molecular characterization of chicken syndecan-2 proteoglycan

    DEFF Research Database (Denmark)

    Chen, Ligong; Couchman, John R; Smith, Jacqueline

    2002-01-01

    A partial syndecan-2 sequence (147 bp) was obtained from chicken embryonic fibroblast poly(A)+ RNA by reverse transcription-PCR. This partial sequence was used to produce a 5'-end-labelled probe. A chicken liver cDNA library was screened with this probe, and overlapping clones were obtained encom...

  2. Haptoglobin Studies in Kenyan Indigenous Chickens | Maina ...

    African Journals Online (AJOL)

    Haptoglobin Studies in Kenyan Indigenous Chickens. J. O. Maina, M. Bhattacharjee, P. J. Aduma. Abstract. Haptoglobin polymorphism was found in indigenous chickens of Kenya. Haptoglobin was found to be in Hardy-Weinberg Equilibrium. There was high average diversity recorded with respect to haptoglobin.

  3. Breeding program for indigenous chicken in Kenya

    NARCIS (Netherlands)

    Ngeno, K.

    2015-01-01

    Abstract Ngeno, K. (2015). Breeding program for indigenous chicken in Kenya. Analysis of diversity in indigenous chicken populations. PhD thesis, Wageningen University, the Netherlands The objective of this research was to generate knowledge required for the development of an

  4. Genetic characterization of native southern African chicken ...

    African Journals Online (AJOL)

    This study presents the first results on the evaluation and selection of polymorphic microsatellite markers for the genetic characterization of native chicken populations in southern Africa. Blood samples for DNA extraction were obtained from five chicken lines from South Africa (Koekoek, New Hampshire, Naked-Neck, ...

  5. Immunological characterisation of two chicken lines

    NARCIS (Netherlands)

    Kreukniet, M.B.

    1996-01-01


    Two chicken lines were divergently selected for antibody response to sheep red blood cells (SRBC). Several experiments were conducted to investigate what mechanisms the immune system of the chickens uses to realize either the high (H) or the low (L) antibody production. The lines did not

  6. What's so special about chicken immunology?

    Science.gov (United States)

    What’s so special about chickens? Firstly, chickens are not only an invaluable model for studying immunology, they also provide the world’s main source of meat and will be a key protein source needed to feed the growing human population into the future. Poultry meat production is highly efficient ...

  7. Toxoplasma gondii: A study of oocyst re-shedding in domestic cats.

    Science.gov (United States)

    Zulpo, Dauton Luiz; Sammi, Ana Sue; Dos Santos, Joeleni Rosa; Sasse, João Pedro; Martins, Thais Agostinho; Minutti, Ana Flávia; Cardim, Sérgio Tosi; de Barros, Luiz Daniel; Navarro, Italmar Teodorico; Garcia, João Luis

    2018-01-15

    The aim of the present study was to evaluate the re-shedding of T. gondii oocysts in cats fed tissue cysts of homologous and heterologous strains 12, 24 and 36 months after the first infection. Thirteen cats were used in the present study and were divided into four groups: G1 (n=2), G2 (n=3), G3 (n=5), and G4 (n=3). G1, G3 and G4 cats were infected with brain cysts of ME49 and G2 with TgDoveBr8, both genotype II strains of T. gondii. The G1 and G2 cats were re-infected after twelve months with brain cysts of VEG strain (genotype III), and G3 cats were re-infected with TgDoveBr1 (genotype II). The G3 cats were re-infected a third time after 24 months from the second infection, and the G4 cats were re-infected 36 months after the initial infection with cysts of the VEG strain. The cats' feces were evaluated using fecal flotation and genotyped with PCR-RFLP. The serological responses for IgM, IgA and IgG were determined by ELISA. All cats shed oocysts after the initial infection. Only one G1 cat shed oocysts when re-infected after twelve months with the VEG strain. No G2 cats excreted oocysts after the second infection with VEG. G3 cats, when re-infected after twelve months with the TgDoveBr1 strain, did not shed oocysts. However, when challenged after a third time with the VEG strain, three out of four cats shed oocysts. In the G4 group, when re-infected after thirty-six months with the VEG strain, two out of three cats shed oocysts. All oocyst samples were genotyped and characterized as the same genotype from the inoculum. Protection against oocyst re-excretion occurred in 90%, 25%, and 33.4% of cats after 12, 24, and 36 months from the initial infection, respectively. Therefore, the environmental contamination by oocysts from re-infected adult cats is only 30% lower than from kittens. In conclusion, the excretion of T. gondii oocysts was higher in experimentally re-infected cats throughout the years, especially when a heterologous strain was used. Copyright © 2017

  8. Toxic effect of carbon tetrachloride on the liver of chicken

    Directory of Open Access Journals (Sweden)

    M. G. Saeed

    2009-01-01

    Full Text Available The aim of the present study was assessment of gross and microscopic pathological changes resulting from sub acute and sub chronic toxicity of carbon tetrachloride CCl4 (99.5% in the liver of chicken and its relation with serum alanine aminotransferase (ALT and aspartate aminotransferase (AST levels. The approximate lethal dose in three weeks old chickens was equal to (994 mg/kg i.p.. In the sub acute toxicity experiment the given dose was (497 mg/kg i.p. twice a week for one week, the liver of treated animals with CCl4 grossly appeared pale and mottled with white yellowish color patches represent the necrotic tissue, the histopathological changes was severe hepatitis with infiltration of inflammatory cells specially heterophiles and diffused coagulative necrosis. In sub chronic toxicity experiment the dose was given (248.5 mg/kg i.p. twice a week for eight weeks, in gross appearance the liver was severely congested, the histopathological changes was hypertrophy of hepatocytes, hyperplasia of lining epithelium of bile ducts and chronic venous congestion, growth depression and significant decreased in the body weight of the treated animals also noticed at this experiment in compared with control group, a significant increased in (ALT and (AST activities also recorded. The results suggests that pathological changes and response of the chicken’s liver to the CCl4 toxicity relatively differs from other laboratory animal models like rats and mice when used approximate dose in the same duration of exposure, so it didn’t appear fibrosis or cirrhosis of the liver of chickens, therefore it can't use chickens as a model to induce experimental fibrosis or liver cirrhosis when treated with CCl4 according to the dose and duration of exposure of this study.

  9. SHEDDING OF FRUITING STRUCTURES IN COTTON: FACTORS, COMPENSATION AND PREVENTION

    Directory of Open Access Journals (Sweden)

    Muhammad Tariq

    2017-08-01

    Full Text Available The fruiting potential of advanced cotton cultivars is not a limiting factor for achieving yield targets but retention of squares and flowers for successful maturation into bolls is major challenge. In this article, we focused on why shedding occurs, its mechanism, yield losses, plant self-compensation, effects on plant growth and possible management to ameliorate its adverse effects. We concluded that it is quite unfair to blame single factor, instead it is an integrated effect of plant and stress factors i.e., high temperature, drought, thick plant stand, insects and diseases etc. contribute to accelerate shedding which ranges about 40-50%. The stresses induce the excessive production of degrading enzymes like pectinase, cellulose and hydrolase, while ethylene and abscisic acid is produced excessively to hasten the degradation process for shedding. The physiological disturbance contributes 7-35 and 42-64% abscission of unopened flowers and bolls, respectively. The square and flower are more frequent to shedding at high temperature compared to immature bolls. The flowers and boll shedding up to 30% is tolerable limit because cotton can recover yield provided weather support the crop later in season. The self-regulated abscission of floral parts is not easy to control under field conditions, however, the adverse effects of stress mediated shedding can be ameliorated with girdling and avoiding pest and stressful conditions, application of plant growth regulator (PGR to control vegetative growth  and abscisic acid (abscission promoter and ethylene inhibitors like naphthalene acetic acid, silver thiosulfate and 1-methylcyclopropene.

  10. Rotavirus shedding in premature infants following first immunization.

    Science.gov (United States)

    Smith, Candice K; McNeal, Monica M; Meyer, Nicole R; Haase, Simone; Dekker, Cornelia L

    2011-10-19

    There is limited data regarding rotavirus vaccine shedding in premature infants. We describe the natural history of rotavirus shedding in premature infants in the 2-week period following first immunization with RotaTeq(®), the pentavalent rotavirus vaccine (RV5), and the risk for symptomatic transmission to household contacts (HHC). A prospective pilot study of 15 premature infants of gestational ages 26-34 weeks immunized with RV5 between 6 and 14 weeks chronological age on discharge from the NICU was conducted. Stool samples collected in the following 2 weeks and analyzed for rotavirus antigen by enzyme immunoassay (EIA), cell culture, and RT-PCR. Solicited adverse events were collected on study subjects and any symptoms of fever, vomiting and diarrhea in HHC. Rotavirus antigen shedding after immunization was detected, with positive rotavirus EIA results in 53.3% of premature infants and in 22.1% of 86 stool samples collected. Shedding rates by RT-PCR were higher with 86.7% of infants and 76.7% of samples being positive. Only 42% of EIA positive samples were positive by cell culture (8/86 total samples, 9.3%). None of 53 HHC reported symptoms of rotavirus infection during the 4 weeks following immunization of the infants. The findings of this study demonstrate that premature infants have positive stools by EIA, viral culture, and RT-PCR at varying time points during 2 weeks following first-dose immunization with RV5. RT-PCR shedding rates need to be clinically evaluated in the context of virus quantification by cell culture, which was low. No symptomatic transmission to HHC was detected in this study, supporting low transmissibility of vaccine virus shed by these infants born prematurely. Copyright © 2011 Elsevier Ltd. All rights reserved.

  11. Directional differentiation of chicken embryonic stem cells into ...

    African Journals Online (AJOL)

    Chicken embryonic stem (ES) cells are useful for producing transgenic chickens and preserving genetic material in avian species. In this study, the differentiation potential of chicken ES cells was investigated in vitro. Chicken ES cells were differentiated into osteoblasts cultured for 15 to 21 days in the induction media ...

  12. Computation of vortex-shedding flows past a square cylinder employing LES and RANS

    Energy Technology Data Exchange (ETDEWEB)

    Lakehal, D.; Thiele, F. [Technische Univ. Berlin (Germany). Hermann Foettinger Inst. fuer Stroemungsmechanik; Duchamp de Lageneste, L.; Buffat, M. [LMFA, Ecole Centrale de Lyon, Ecully (France)

    1998-12-31

    The paper addresses the predictive capabilities of different computational modelling practices which employ various eddy-viscosity models for turbulence, that are based on a linear, a quadratic and two cubic representations of the Reynolds stress tensor in terms of strain and vorticity rates respectively, in the context of a comparative study between Reynolds-Averaged Navier-Stokes Equations and Large Eddy Simulation of vortex-shedding flows. The test case considered here refers to the familiar vortex-shedding flow past a square cylinder at R{sub e}=22.000 studied experimentally by Lyn et al. All the models were found to reproduce fairly well the shedding dynamics with the exception of eddy-viscosity models employed with a high rate of oncoming turbulence. The total kinetic energy was fairly well predicted by all models, whereas the turbulent part was significantly underestimated. Comparison of this latter quantity has emphasized the effective role of turbulence anisotropy in rendering the effects of shedding mechanisms. The integral parameters were determined with much better agreement with measurements than the averaged quantities. The essential finding is that the explicit algebraic stress models predict much better the global parameters with increasing the order of anisotropy. The confusing results of Large Eddy Simulation, i.e. satisfactory agreements of the time-averaged velocity and energy profiles to the expense of a less accurate prediction of the global coefficients, did not support the superiority of the concept. Still, the practice has revealed a particular sentivity to the near-wall treatment. (orig.)

  13. The effect of site of starch digestion on performance of broiler chickens

    NARCIS (Netherlands)

    Weurding, R.E.; Enting, H.; Verstegen, M.W.A.

    2003-01-01

    A growth trial with 420 broiler chickens (35 per experimental unit) was conducted in order to evaluate whether bird performance (Days 0–38) is affected by site of starch digestion. Two diets were formulated with the same calculated apparent metabolisable energy, digestible lysine, and digestible

  14. Performance and egg quality traits of egg-type chickens fed ...

    African Journals Online (AJOL)

    The study evaluated the performance of egg type chickens fed diets where Cottonseed cake (CSC) replaced Soybean cake (SBC) in five experimental rations such that 0% (control), 15%, 30%, 45% and 60% of CSC replaced SBC. The design of the experiment was completely randomized design (CRD). Chemical analysis ...

  15. The effect of propolis extract in the diet of chickens Ross 308 on their performance

    Directory of Open Access Journals (Sweden)

    PETER HACK

    2014-12-01

    Full Text Available The focus of the study was the performance of Ross 308 chickens after the application of propolis extract in their diet. The nutritional value of feed mixtures for chickens was equal, but the experimental groups were also added propolis extract in the dose of 200 mg.kg-1 (E1, 300 mg.kg-1 (E2 and 400 mg.kg-1 (E3, respectively. The results of the experiments showed that the propolis extract in the examined concentrations can be applied to the diet of chickens, since it managed to raise (P = 0.05 the body weight positively (E1 2354.60 g; E2 2371.40 g; E3 2382.90 g, compared to control group (2272.89 g. Total increase of body weights indicates positive tendency of propolis extract in the diet of chickens Ross 308, because higher values (P = 0.05 were reached in the experimental groups (2311.60 g E1 to 2339.60 g E3 compared to control (2230.80 g. Total feed consumption was higher in the experimental groups, on the contrary, FCR was lower (P = 0.05 in the experimental groups (1.64 to 1.67 compared to control (1.69. The best performance results were reached in the group with the greatest addition of propolis extract, i.e. in the dose 400 mg.kg-1 of feed mixtures (E3.

  16. Effects of false yam tuber meals and charcoal on broiler chicken ...

    African Journals Online (AJOL)

    One hundred and sixty-eight 28-day-old healthy female broiler chickens (average initial bodyweight 1081.1 ± 66.20 g) were randomly assigned to 28 experimental groups (7 dietary treatments, 4 replicates) of six birds each, using a randomized complete block design. Dietary treatments included the control diet (commercial ...

  17. Improved resistance to Eimeria acervulina infection in chickens due to dietary supplementation with garlic metabolites

    Science.gov (United States)

    The effects of a compound including secondary metabolites of garlic, propyl thiosulfinate (PTS) and propyl thiosulfinatate oxide (PTSO), on in vitro and in vivo parameters of chicken gut immunity during experimental Eimeria acervulina infection were evaluated. In in vitro assays, the compound of P...

  18. Neutrophils stimulation index in people under consumption of broiler chickens meat at pre-slaughter stress correction

    Directory of Open Access Journals (Sweden)

    S. Grabovskyi

    2015-09-01

    introduced before slaughter (experimental group. The neutrophils stimulation index decreased in men blood (–2,21 after consumption of broiler chickens meat at pre-slaughter stress (control group. The neutrophils stimulation index in men blood of experimental and control groups differed by 34,8%, but did not go beyond the physiological norm. At the final stage of poultry feeding it is necessary to consider pre-slaughter stress and to apply biologically active substances of natural origin, such as spleen extract. The results obtained in the experiment on broiler chickens can be used in studies of non-specific resistance indices of the farm animals for increasing the organism resistance, correction and avoiding of pre-slaughter stress and improvement of product quality

  19. The effect of the humic substances, garlic (Allium sativum L., wormwood (Artemisia absinthium and walnut (Juglans regia on growth parameters and mortality of broiler chickens

    Directory of Open Access Journals (Sweden)

    Veronika Pistová

    2017-11-01

    Full Text Available The aim of this experiment was to determine the influence of humic substances, garlic (Allium sativum L., wormwood (Artemisia absinthium and walnut (Juglans regia on growth performance and mortality of broiler chickens. A total of 60 Ross 308 broiler chickens were divided into 3 groups (n=20. The control group of chickens was fed with complete feed mixtures without any additives. Chickens in the first experimental group E1 were fed a diet containing 1.5% of humic substances, 0.4% of garlic powder and 0.1% of wormwood. Chickens in the second experimental group E2 were fed a diet containing 1.5% of humic substances, 0.4% of garlic powder and 0.1% of walnut. The body weight, feed intake, feed conversion and total mortality were recorded in 42 day of fattening. At the end of the experiment was average body weight significantly higher (P≤0.01 in the first experimental group compared to the control group (values in the order of the groups: 1801.04±166.25; 1928.26±226.37 and 1850.24 g±SD. The feed intake was in the control group 3.59 kg per chicken, in the first experimental group E1 3.58 kg per chicken and in the second experimental group E2 3.45 kg per chicken. Feed conversion was in control group 1.95 kg, in the first experimental group E1 1.87 kg and in the second experimental group E2 1.84 kg with no significant different (P≥0.05 compared to the control group. Total mortality in 42 day was positive affected in the second experimental group, but with no significant different (P≥0.05 compared to the control group.

  20. "Chickens Are a Lot Smarter than I Originally Thought": Changes in Student Attitudes to Chickens Following a Chicken Training Class.

    Science.gov (United States)

    Hazel, Susan J; O'Dwyer, Lisel; Ryan, Terry

    2015-08-21

    A practical class using clicker training of chickens to apply knowledge of how animals learn and practice skills in animal training was added to an undergraduate course. Since attitudes to animals are related to their perceived intelligence, surveys of student attitudes were completed pre- and post- the practical class, to determine if (1) the practical class changed students' attitudes to chickens and their ability to experience affective states, and (2) any changes were related to previous contact with chickens, training experience or gender. In the post- versus pre-surveys, students agreed more that chickens are easy to teach tricks to, are intelligent, and have individual personalities and disagreed more that they are difficult to train and are slow learners. Following the class, they were more likely to believe chickens experience boredom, frustration and happiness. Females rated the intelligence and ability to experience affective states in chickens more highly than males, although there were shifts in attitude in both genders. This study demonstrated shifts in attitudes following a practical class teaching clicker training in chickens. Similar practical classes may provide an effective method of teaching animal training skills and promoting more positive attitudes to animals.

  1. Control of vortex shedding on two- and three-dimensional aerofoils.

    Science.gov (United States)

    Colonius, Tim; Williams, David R

    2011-04-13

    We review and expand on the control of separated flows over flat plates and aerofoils at low Reynolds numbers associated with micro air vehicles. Experimental observations of the steady-state and transient lift response to actuation, and its dependence on the actuator, aerofoil geometry and flow conditions, are discussed and an attempt is made to unify them in terms of their excitation of periodic and transient vortex shedding. We also examine strategies for closed-loop flow and flight control using actuation of leading-edge vortices.

  2. Different feed withdrawal times before slaughter influence caecal fermentation and faecal Salmonella shedding in pigs.

    Science.gov (United States)

    Martín-Peláez, Sandra; Peralta, Bibiana; Creus, Eva; Dalmau, Antonio; Velarde, Antonio; Pérez, Jose F; Mateu, Enric; Martín-Orúe, Susana M

    2009-12-01

    The effects of different pre-slaughter feed withdrawal times (FWT) on the gastrointestinal tract (GIT) weight and the gut environment of pigs and Salmonella shedding were investigated. Trial 1 evaluated the effects under experimental conditions (feed withdrawal for 18, 30 and 36 h) and trial 2 under commercial conditions (15 and 30 h). In trial 1, the GIT weight tended to decrease (P=0.07), the caecal pH increased (PSalmonella positive pigs tended to increase whereas lactobacilli decreased (PSalmonella in faeces, and may represent a higher risk of carcass contamination in cases of laceration of viscera.

  3. Egg serpins: The chicken and/or the egg dilemma.

    Science.gov (United States)

    Dombre, Clara; Guyot, Nicolas; Moreau, Thierry; Monget, Philippe; Da Silva, Mylène; Gautron, Joël; Réhault-Godbert, Sophie

    2017-02-01

    Twenty-seven serpins belonging to clade A, B, C, D, E, F, G, H and I serpins are currently referenced in chicken genome databases. Phylogenetic analysis of chicken serpins revealed that ovalbumin (Serpinb14) and its paralogs ovalbumin-related protein Y (Serpinb14b) and ovalbumin-related protein X (Serpinb14c) are found in bird species. These clade B serpins are specifically expressed in reproductive tissues and exported in the egg where they constitute major protein components. These data suggest that these three paralogs have probably appeared in birds to face new environments and ensure the extra-uterine development of an embryo in a shell egg. Twelve other serpins have been identified in the newly produced egg, some of them having a specific distribution in the respective egg structures (eggshell, egg white, vitelline membrane and egg yolk). The physiological role of these egg serpins remain largely unexplored, but there is increasing evidence in literature or by homologies with their mammalian counterparts, that some of them participate in cell proliferation, tissue remodeling and/or angiogenesis associated with folliculogenesis and development of extraembryonic structures, eggshell biomineralization, egg defense and nutrition of the embryo. A better knowledge of the phylogenetic evolution of these 15 serpins in other oviparous species, on their egg distribution, on their regulation during embryonic development (activation/degradation/transfer) and on their functional specificity, is needed to better appreciate their role and their bird-specificity. These review shed light on the multiple possibilities that offer the avian egg model to study the role of serpins in reproduction and developmental biology. Copyright © 2016 The Author(s). Published by Elsevier Ltd.. All rights reserved.

  4. Characterization of the Phospholipid Platelet-Activating Factor As a Mediator of Inflammation in Chickens

    Science.gov (United States)

    Garrido, Damien; Chanteloup, Nathalie K.; Trotereau, Angélina; Lion, Adrien; Bailleul, Geoffrey; Esnault, Evelyne; Trapp, Sascha; Quéré, Pascale; Schouler, Catherine; Guabiraba, Rodrigo

    2017-01-01

    Lipid mediators are known to play important roles in the onset and resolution phases of the inflammatory response in mammals. The phospholipid platelet-activating factor (PAF) is a pro-inflammatory lipid mediator which participates in vascular- and innate immunity-associated processes by increasing vascular permeability, by facilitating leukocyte adhesion to the endothelium, and by contributing to phagocyte activation. PAF exerts its function upon binding to its specific receptor, PAF receptor (PAFR), which is abundantly expressed in leukocytes and endothelial cells (ECs). In chickens, lipid mediators and their functions are still poorly characterized, and the role of PAF as an inflammatory mediator has not yet been investigated. In the present study we demonstrate that primary chicken macrophages express PAFR and lysophosphatidylcholine acyltransferase 2 (LPCAT2), the latter being essential to PAF biosynthesis during inflammation. Also, exogenous PAF treatment induces intracellular calcium increase, reactive oxygen species release, and increased phagocytosis by primary chicken macrophages in a PAFR-dependent manner. We also show that PAF contributes to the Escherichia coli lipopolysaccharide (LPS)-induced pro-inflammatory response and boosts the macrophage response to E. coli LPS via phosphatidylinositol 3-kinase/Akt- and calmodulin kinase II-mediated intracellular signaling pathways. Exogenous PAF treatment also increases avian pathogenic E. coli intracellular killing by chicken macrophages, and PAFR and LPCAT2 are upregulated in chicken lungs and liver during experimental pulmonary colibacillosis. Finally, exogenous PAF treatment increases cell permeability and upregulates the expression of genes coding for proteins involved in leukocyte adhesion to the endothelium in primary chicken endothelial cells (chAEC). In addition to these vascular phenomena, PAF boosts the chAEC inflammatory response to bacteria-associated molecular patterns in a PAFR-dependent manner

  5. Toxicity studies of six types of carbon nanoparticles in a chicken-embryo model

    DEFF Research Database (Denmark)

    Kurantowicz, Natalia; Sawosz, Ewa; Halik, Gabriela

    2017-01-01

    graphene oxide, and reduced graphene oxide. Experimental solutions at a concentration of 500 µg/mL were administrated into the egg albumin. Gross pathology and the rate of survival were examined after 5, 10, 15, and 20 days of incubation. After 20 days of incubation, blood samples were collected......In the present study, the toxicity of six different types of carbon nanoparticles (CNPs) was investigated using a chicken-embryo model. Fertilized chicken eggs were divided into the following treatment groups: placebo, diamond NPs, graphite NPs, pristine graphene, small graphene oxide, large...

  6. Optimisation of surfactant decontamination and pre-treatment of waste chicken feathers by using response surface methodology.

    Science.gov (United States)

    Tesfaye, Tamrat; Sithole, Bruce; Ramjugernath, Deresh; Ndlela, Luyanda

    2017-11-10

    Commercially processed, untreated chicken feathers are biologically hazardous due to the presence of blood-borne pathogens. Prior to valorisation, it is crucial that they are decontaminated to remove the microbial contamination. The present study focuses on evaluating the best technologies to decontaminate and pre-treat chicken feathers in order to make them suitable for valorisation. Waste chicken feathers were washed with three surfactants (sodium dodecyl sulphate) dimethyl dioctadecyl ammonium chloride, and polyoxyethylene (40) stearate) using statistically designed experiments. Process conditions were optimised using response surface methodology with a Box-Behnken experimental design. The data were compared with decontamination using an autoclave. Under optimised conditions, the microbial counts of the decontaminated and pre-treated chicken feathers were significantly reduced making them safe for handling and use for valorisation applications. Copyright © 2017 Elsevier Ltd. All rights reserved.

  7. Ranging Behaviour of Commercial Free-Range Broiler Chickens 1: Factors Related to Flock Variability.

    Science.gov (United States)

    Taylor, Peta S; Hemsworth, Paul H; Groves, Peter J; Gebhardt-Henrich, Sabine G; Rault, Jean-Loup

    2017-07-20

    Little is known about the ranging behaviour of chickens. Understanding ranging behaviour is required to improve management and shed and range design to ensure optimal ranging opportunities. Using Radio Frequency Identification technology, we tracked 300 individual broiler chickens in each of four mixed sex ROSS 308 flocks on one commercial farm across two seasons. Ranging behaviour was tracked from the first day of range access (21 days of age) until 35 days of age in winter and 44 days of age in summer. Range use was higher than previously reported from scan sampling studies. More chickens accessed the range in summer (81%) than winter (32%; p < 0.05). On average, daily frequency and duration of range use was greater in summer flocks (4.4 ± 0.1 visits for a total of 26.3 ± 0.8 min/day) than winter flocks (3.2 ± 0.2 visits for a total of 7.9 ± 1.0 min/day). Seasonal differences were only marginally explained by weather conditions and may reflect the reduction in range exposure between seasons (number of days, hours per day, and time of day). Specific times of the day (p < 0.01) and pop-holes were favoured (p < 0.05). We provide evidence of relationships between ranging and external factors that may explain ranging preferences.

  8. Bone computed tomography mineral content evaluation in chickens: effects of substances in homeopathic concentration.

    Science.gov (United States)

    Canello, Sergio; Gasparini, Gabriele; Luisetto, Patrizio; Di Cerbo, Alessandro; Pomerri, Fabio

    2016-02-01

    Ninety-six cobb race chickens were equally divided in 4 groups and randomly assigned to receive a standard treatment feed + homeopathic concentrations of Symphytum (S.) officinalis (9CH), or standard treatment feed + homeopathic concentrations of Tricalcarea (4CH), or standard treatment feed + homeopathic concentrations of Calcarea (C.) carbonica (30CH) or a placebo (the same feed but without any homeopathic compound) in order to assess the ability of the homeopathic compounds to increase the concentration of calcium hydroxyapatite in the sternal spongy bone tissue. We measured the concentration of calcium hydroxyapatite in the sternal spongy bone tissue of all chickens by means of a computed tomography (CT). 30%, 36% and 63% increase of sternum spongy-bone mineralization was observed after a 2 years period in the treatment groups with S. officinalis (9CH), Tricalcarea (4CH) (*P < 0.05) and C. carbonica (30CH) (***P < 0.001) respectively. Bone mineralization is usually low in battery chickens reared in commercial poultry-sheds, creating a weakness of the whole animal supporting apparatus. Homeopathic preparations with bone-tissue tropism may improve their health quality. Copyright © 2015 The Authors. Published by Elsevier Ltd.. All rights reserved.

  9. Suppression of vortex shedding around a square cylinder using ...

    Indian Academy of Sciences (India)

    Abstract. Direct numerical simulation (DNS) of flow past a square cylinder at a. Reynolds number of 100 has been carried out to explore the effect of blowing in the form of jet(s) on vortex shedding. Higher order spatial as well as temporal discretiza- tion has been employed for the discretization of governing equations.

  10. Suppression of vortex shedding around a square cylinder using ...

    Indian Academy of Sciences (India)

    Direct numerical simulation (DNS) of flow past a square cylinder at a Reynolds number of 100 has been carried out to explore the effect of blowing in the form of jet(s) on vortex shedding. Higher order spatial as well as temporal discretization has been employed for the discretization of governing equations. The varying ...

  11. Heritage Conservation in the "Back Shed" of the Learning City.

    Science.gov (United States)

    Boshier, Roger

    2003-01-01

    Describes Back Shed, a group of New Zealand heritage conservationists who center their work in lifelong learning. Situates their activities in the context of the learning city, a community development concept that mobilizes learning resources across many sectors. Discusses heritage conservation as a process of meaning making. (Contains 29…

  12. Vortex Shedding and Depinning of Wind-Forced Liquid Drops

    Science.gov (United States)

    Simon, Roger; White, Edward

    2017-11-01

    Water drops adhere to solid substrates but can depin when wind forcing exceeds the adhesion force provided by surface tension. Schmucker and White (2012.DFD.M4.6) measured critical wind forcing limits for high-Reynolds-number airflow forcing and found a critical constant Weber number, Wecrit = 8.0 , for a range of drop Bond numbers. This work seeks to identify what behavior is associated with Wecrit = 8.0 and why wind-forced drops depin when they do. One hypothesis suggests that, at high Reynolds numbers, drops depin when their interface natural frequency matches the frequency of air vortex shedding in the separated drop wake. We investigate whether a resonance between vortex shedding and drop interface oscillations is involved with depinning. We measure the shedding frequencies behind solid protuberances of the same size as typical drops and, separately, water-drop interface frequencies. We compare our measured values under different flow conditions to establish whether shedding and interface resonance are related to depinning. 1Supported by the National Science Foundation through Grant CBET-1605947.

  13. Older Men as Learners: Irish Men's Sheds as an Intervention

    Science.gov (United States)

    Carragher, Lucia; Golding, Barry

    2015-01-01

    To date, little attention has been placed on older men (aged 50+ years) as learners, with much of the literature on adult learning concerned with younger age-groups and issues around gender equity directed mainly at women. This article examines the impact of community-based men's sheds on informal and nonformal learning by older men in Ireland. It…

  14. Faecal Campylobacter shedding among dogs in animal shelters across Texas.

    Science.gov (United States)

    Leahy, A M; Cummings, K J; Rodriguez-Rivera, L D; Hamer, S A; Lawhon, S D

    2017-12-01

    Epidemiologic studies on faecal Campylobacter shedding among dogs in the United States have been limited, despite evidence that the incidence of human campylobacteriosis has increased over the last decade. Our objectives were to estimate the prevalence of faecal Campylobacter shedding among shelter dogs in Texas, to estimate the specific prevalence of Campylobacter jejuni and Campylobacter coli shedding, and to identify risk factors for Campylobacter-positive status. Using a cross-sectional study design, we collected faecal samples from dogs in six animal shelters across Texas between May and December, 2014. Quantitative PCR protocols were used to detect Campylobacter in samples and to specifically identify C. jejuni and C. coli. The prevalence of faecal Campylobacter shedding among sampled dogs was 75.7% (140/185). Prevalence varied significantly by shelter (p = .03), ranging from 57% to 93%. There was a marginal association (p = .06) between abnormal faecal consistency and positive Campylobacter status, after controlling for shelter as a random effect. However, approximately 70% of Campylobacter-positive dogs had grossly normal faeces. Campylobacter prevalence did not vary significantly by age group or sex. The prevalence of C. jejuni-positive samples was 5.4% (10/185), but C. coli was not detected in any samples. Dogs are a potential source of zoonotic Campylobacter transmission. © 2017 Blackwell Verlag GmbH.

  15. Shedding of Water Drops from a Surface under Icing Conditions.

    Science.gov (United States)

    Mandal, Deepak Kumar; Criscione, Antonio; Tropea, C; Amirfazli, A

    2015-09-01

    A sessile water drop exposed to an air flow will shed if the adhesion is overcome by the external aerodynamic forces on the drop. In this study, shedding of water drops were investigated under icing conditions, on surfaces with different wettabilities, from hydrophilic to superhydrophobic. A wind tunnel was used for experiments in a temperature range between -8 and 24.5 °C. Results indicate that the temperature has a major influence on the incipient motion of drop shedding. The critical air velocity (U(c)) at which a drop first starts to shed generally increases under icing conditions, indicating an increase in the adhesion force. The contact angle hysteresis (CAH) and the drop base length (L(b)) are found to be the controlling factors for adhesion. A correlation was also developed to deduce the drag coefficient, C(D) for the drop. It was found that C(D) can decrease under icing conditions. In general, a lower C(D) and higher adhesion together lead to a higher critical air velocity. However, there are systems such as water on Teflon for which the critical air velocity remains practically unaffected by temperature because of similar adhesion and C(D) values, at all temperatures tested.

  16. Solar-Powered Groundwater Pumping Systems for Nigerian Water Sheds

    OpenAIRE

    SODIKI, John; Sodiki, J. I.

    2016-01-01

    The paper presents an overview of the occurrence of different groundwater sheds, water quality, and availability in Nigeria. it also discussed the viability of solar-powered groundwater pumping systems in Nigeria. Applicable methods for system design and economic analysis are further outlined.

  17. Shed-blood-separation and cell-saver

    DEFF Research Database (Denmark)

    Bauer, Adrian; Hausmann, Harald; Schaarschmidt, Jan

    2017-01-01

    OBJECTIVE: The postoperative systemic inflammatory response after cardiopulmonary bypass (CPB) is still an undesirable side-effect after cardiac surgery. It is most likely caused by blood contact with foreign surfaces and by the surgical trauma itself. However, the recirculation of activated shed...

  18. SHEDS-HT: An Integrated Probabilistic Exposure Model for ...

    Science.gov (United States)

    United States Environmental Protection Agency (USEPA) researchers are developing a strategy for highthroughput (HT) exposure-based prioritization of chemicals under the ExpoCast program. These novel modeling approaches for evaluating chemicals based on their potential for biologically relevant human exposures will inform toxicity testing and prioritization for chemical risk assessment. Based on probabilistic methods and algorithms developed for The Stochastic Human Exposure and Dose Simulation Model for Multimedia, Multipathway Chemicals (SHEDS-MM), a new mechanistic modeling approach has been developed to accommodate high-throughput (HT) assessment of exposure potential. In this SHEDS-HT model, the residential and dietary modules of SHEDS-MM have been operationally modified to reduce the user burden, input data demands, and run times of the higher-tier model, while maintaining critical features and inputs that influence exposure. The model has been implemented in R; the modeling framework links chemicals to consumer product categories or food groups (and thus exposure scenarios) to predict HT exposures and intake doses. Initially, SHEDS-HT has been applied to 2507 organic chemicals associated with consumer products and agricultural pesticides. These evaluations employ data from recent USEPA efforts to characterize usage (prevalence, frequency, and magnitude), chemical composition, and exposure scenarios for a wide range of consumer products. In modeling indirec

  19. Synergized resmethrin and corticosterone alter the chicken's response to west nile virus

    Energy Technology Data Exchange (ETDEWEB)

    Jankowski, Mark David [Los Alamos National Laboratory; Franson, J Christian [US GEOLOGICAL SURVEY; Mostl, Erich [UNIV OF VIENNA; Porter, Warren P [UNIV OF WISCONSIN; Hofmeister, Erik K [US GEOLOGICAL SURVEY

    2009-01-01

    Debate concerning arbovirus control strategies remains contentious because concern regarding the relative risk of viral infection and environmental toxicant exposure is high but inadequately characterized. Taking this into account, mosquito control agencies employ aerial insecticides only after arbovirus surveillance data indicate high local mosquito-infection-rates. Successfully mitigating the risk of adult-mosquito-control insecticides ('adulticides') to non-target species such as humans, domestic animals, fish, beneficial insects and wildlife, while increasing their efficacy to reduce arbovirus outbreak intensity requires targeted scientific data from animal toxicity studies and environmental monitoring activities. Wild birds are an important reservoir host for WNv and are potentially exposed to insecticides used for mosquito control. However, no risk assessments have evaluated whether insecticides augment or extend the potential transmissibility of West Nile virus (WNv) in birds. In order to augment existing resmethrin risk assessments, we aimed to determine whether synergized resmethrin (SR) may cause chickens to develop an elevated or extended WN viremia and if subacute stress may affect its immunotoxicity. We distributed 40 chickens into four groups then exposed them prior to and during WNv infection with SR (50 {mu}g/l resmethrin + 150 {mu}g/l piperonyl butoxide) and/or 20 mg/I corticosterone (CORT) in their drinking-water. Corticosterone was given for 10 continuous days and SR was given for 3 alternate days starting the 3rd day of CORT exposure, then chickens were subcutaneously inoculated with WNv on the 5th day of CORT treatment. Compared to controls, CORT treatment extended and elevated viremia, enhanced WNv-specific antibody and increased the percentage of birds that shed oral virus, whereas SR treatment extended viremia, depressed WNv-specific IgG, and increased the percentage of CORT-treated birds that shed oral virus. Corticosterone and SR

  20. Effect of Replacing Beef Fat with Chicken Skin on Some Properties of Model System Chicken Emulsions

    Directory of Open Access Journals (Sweden)

    Aslı Zungur

    2015-12-01

    Full Text Available Model system chicken emulsions were prepared by replacing 5, 10, 15 and 20 % beef fat with chicken skin. Moisture, protein, fat, ash and pH were determined in raw and heat processed emulsions. Emulsion samples were evaluated for cooking characteristics, TBA values and colour parameters (L*, a*, b*. Addition of chicken skin decreased fat content and increased moisture and protein content of emulsion samples. Chicken skin replacement significantly increased water holding capacity and cooking yield and decreased fluid release. Increasing chicken skin in formulation increased a* and b* values of emulsion samples. Therefore, adding of chicken skin instead of beef fat is useful in improving technological quality and producing low fat formulation.

  1. Immunopathology and Th1/Th2 immune response of Campylobacter jejuni-induced paralysis resembling Guillain-Barré syndrome in chicken.

    Science.gov (United States)

    Nyati, Kishan K; Prasad, Kashi N; Kharwar, Nagendra K; Soni, Priyanka; Husain, Nuzhat; Agrawal, Vinita; Jain, Arun K

    2012-05-01

    Immunopathogenesis of Campylobacter jejuni-associated Guillain-Barré syndrome (GBS) is not yet well established probably due to lack of experimental model. Therefore, we studied the Th1/Th2 immune response and pathological changes in C. jejuni-induced chicken model for GBS. C. jejuni (5 × 10(9) CFU/ml) and placebo were fed to 30 chickens each. Stools of all birds were negative for C. jejuni by culture and PCR before experiment. The birds were regularly assessed for disease symptoms up to 30 days. Sciatic nerves from all chickens were examined at 5 days intervals by histopathology and immunohistochemistry, and also for the expression of Th1/Th2 cytokines. Twenty-two chickens (73.3%) developed diarrhea after C. jejuni infection; 18 (60.0%) experimental chickens developed GBS-like paralytic neuropathy. Pathology in the sciatic nerves of these chickens included perinodal and/or patchy demyelination, perivascular focal lymphocytic infiltration, myelin swelling and presence of macrophages within the nerve fibers on 10th-20th post-infection day (PID). Cytokines (IFN-γ, IL-1β, TNF-α, IL-6 and IL-2) were elevated in early phase (5th-15th PID) and TGF-β2, IL-10 and IL-4 in the recovery phase (25th-30th PID) of the disease. The study provides evidence that C. jejuni infection in the chicken can provide an experimental animal model of GBS.

  2. Constitutive Endocytosis of VEGFR2 Protects the Receptor against Shedding.

    Science.gov (United States)

    Basagiannis, Dimitris; Christoforidis, Savvas

    2016-08-05

    VEGFR2 plays a fundamental role in blood vessel formation and in life threatening diseases, such as cancer angiogenesis and cardiovascular disorders. Although inactive growth factor receptors are mainly localized at the plasma membrane, VEGFR2 undergoes constitutive endocytosis (in the absence of ligand) and recycling. Intriguingly, the significance of these futile transport cycles of VEGFR2 remains unclear. Here we found that, unexpectedly, the function of constitutive endocytosis of VEGFR2 is to protect the receptor against plasma membrane cleavage (shedding), thereby preserving the functional state of the receptor until the time of activation by VEGF. Inhibition of constitutive endocytosis of VEGFR2, by interference with the function of clathrin, dynamin, or Rab5, increases dramatically the cleavage/shedding of VEGFR2. Shedding of VEGFR2 produces an N-terminal soluble fragment (100 kDa, s100), which is released in the extracellular space, and a residual C-terminal part (130 kDa, p130) that remains integrated at the plasma membrane. The released soluble fragment (s100) co-immunoprecipitates with VEGF, in line with the topology of the VEGF-binding domain at the N terminus of VEGFR2. Increased shedding of VEGFR2 (via inhibition of constitutive endocytosis) results in reduced response to VEGF, consistently with the loss of the VEGF-binding domain from the membrane remnant of VEGFR2. These data suggest that constitutive internalization of VEGFR2 protects the receptor against shedding and provides evidence for an unprecedented mechanism via which endocytosis can regulate the fate and activity of growth factor receptors. © 2016 by The American Society for Biochemistry and Molecular Biology, Inc.

  3. Estimation of transmission parameters of H5N1 avian influenza virus in chickens.

    Directory of Open Access Journals (Sweden)

    Annemarie Bouma

    2009-01-01

    Full Text Available Despite considerable research efforts, little is yet known about key epidemiological parameters of H5N1 highly pathogenic influenza viruses in their avian hosts. Here we show how these parameters can be estimated using a limited number of birds in experimental transmission studies. Our quantitative estimates, based on Bayesian methods of inference, reveal that (i the period of latency of H5N1 influenza virus in unvaccinated chickens is short (mean: 0.24 days; 95% credible interval: 0.099-0.48 days; (ii the infectious period of H5N1 virus in unvaccinated chickens is approximately 2 days (mean: 2.1 days; 95%CI: 1.8-2.3 days; (iii the reproduction number of H5N1 virus in unvaccinated chickens need not be high (mean: 1.6; 95%CI: 0.90-2.5, although the virus is expected to spread rapidly because it has a short generation interval in unvaccinated chickens (mean: 1.3 days; 95%CI: 1.0-1.5 days; and (iv vaccination with genetically and antigenically distant H5N2 vaccines can effectively halt transmission. Simulations based on the estimated parameters indicate that herd immunity may be obtained if at least 80% of chickens in a flock are vaccinated. We discuss the implications for the control of H5N1 avian influenza virus in areas where it is endemic.

  4. Ampalaya (Momordica Charantia Leaf Extract Against Gastro-Intestinal Parasites of Native Chicken

    Directory of Open Access Journals (Sweden)

    Glynda F. Pariñas

    2017-05-01

    Full Text Available The general objective of the study is to determine the effectiveness of ampalaya leaf extract against gastrointestinal parasites of native chicken. Specifically, it aimed to:(1to evaluate the anthelmintic property of ampalaya leaf extract in the treatment of gastro-intestinal parasites of native chicken;(2 find out the most effective variety of ampalaya leaves as purgatives for native chicken; and(3 to compare the efficacy of ampalaya leaf extract with commercial purgative in the treatment of gastro-intestinal parasites. A total of fifteen (15 experimental native chickens were used in each study which was distributed into five (5 treatments. For study 1 and 2, Commercial purgative (Piperazine dihydrocloride and commercial purgative (mebendasole, niclosamide and levamisole were used respectively as positive control. Based on the result of the study, ampalaya leaf extract shows comparable effect to positive control (Piperazine dihydrochloride in treating and controlling gastro-intestinal parasites of native chicken. However, commercial purgative with triple ingredient (mebendasole, niclosamide and levamisole shows more effective than the ampalaya extract. The researcher concludes that efficacy of ampalaya leaf extract as purgative is comparable to the effect of commercial purgative with single active ingreadient (Piperazine dihydrochloride, commercial purgative with triple active ingredients ( mebendasole, niclosamide and levamisole excelled over the ampalaya extract because of its multi-ingredients.

  5. Elevated levels of the stress hormone, corticosterone, cause 'pessimistic' judgment bias in broiler chickens.

    Science.gov (United States)

    Iyasere, Oluwaseun S; Beard, Andrew P; Guy, Jonathan H; Bateson, Melissa

    2017-07-31

    Pessimistic judgment biases, whereby humans or non-human animals interpret ambiguous information negatively, are hypothesised to be one of the suite of adaptive changes that comprise the vertebrate stress response. To test this hypothesis, we asked whether experimentally elevating levels of the glucocorticoid stress hormone, corticosterone, in broiler chickens produced a pessimistic judgment bias. We trained young chickens to discriminate a stimulus (paper cone) placed at two locations in an arena, one associated with reward (mealworms) and one with punishment (air puff). During seven days of non-invasive administration of either corticosterone or vehicle control, we tested the birds' responses to the cone placed at ambiguous locations between the trained locations. Corticosterone-treated birds were more likely than controls to respond as if punishment was likely when the cone was placed near to the punished location. The degree of this 'pessimism' was associated with smaller relative spleen weight, which is a documented consequence of chronic stress in chickens. We conclude that changes in corticosterone levels in chickens are sufficient to cause a specific change in decision making, dubbed 'pessimism', whereby corticosterone-treated birds showed an increased expectation of punishment in the face of ambiguous information. Pessimism could be a useful welfare indicator in chickens.

  6. Experimental induction and oral transmission of avian AA amyloidosis in vaccinated white hens.

    Science.gov (United States)

    Murakami, Tomoaki; Muhammad, Naeem; Inoshima, Yasuo; Yanai, Tokuma; Goryo, Masanobu; Ishiguro, Naotaka

    2013-06-01

    Avian AA amyloidosis is commonly observed in adult birds afflicted with bacterial infections or chronic inflammatory disorders. Experimental AA amyloidosis in birds can be induced by repeated inflammatory stimulation, such as injection with casein or vaccination with oil-emulsified bacterins. However, the transmission of amyloidosis among avian species has not been studied well to date. In the present study, we confirm the potential induction of avian AA amyloidosis by inoculation of Salmonella enteritidis (SE) vaccine or Mycoplasma gallisepticum vaccine. To determine the transmission of chicken AA amyloidosis among white hens, we induced experimental AA amyloidosis in vaccinated chickens by intravenous or oral administration of chicken AA fibrils. Amyloid deposits were observed in chickens injected with SE and inoculated with chicken AA fibrils intravenously (21/26: 81%) and orally (8/12: 67%). These results suggest that chicken AA amyloidosis can be induced by vaccinations, and may be transmitted among like species by oral administration.

  7. EFFECT OF BEE POLLEN DIETARY SUPPLEMENTATION ON MEAT PERFORMANCE OF ROSS 308 BROILER CHICKENS

    Directory of Open Access Journals (Sweden)

    Peter Haščík

    2015-02-01

    Full Text Available A present study was conducted to evaluate the effect of dietary inclusion of bee pollen extract on meat performance of Ross 308 broiler chickens. A total of 180 one day-old Ross chicks were involved in experiment. Chickens were divided into 2 groups, an experimental group (E and a control group (C. No added supplement was given to the control group, while the experimental group was given the feed mixture supplemented with bee pollen in an amount of 400 mg.kg-1, during the whole fattening period. Data of live body weight, carcass weight, giblets weight and carcass yield were determined at 42 days of the age. The supplementation of bee pollen increased final body weight of broilers by 68.5 g. Each of investigated parameters of meat performance in experimental group was higher to that in control group, although the difference among the groups was not statistically significant (P≥0.05. The addition of bee pollen at dose 400 mg.kg-1 in the feed mixture indicates the slight effect on meat performance of chickens which can be beneficial for fattening of broiler chickens.

  8. Quality Evaluation of Chicken Nugget Formulated with Various Contents of Chicken Skin and Wheat Fiber Mixture.

    Science.gov (United States)

    Kim, Hack-Youn; Kim, Kon-Joong; Lee, Jong-Wan; Kim, Gye-Woong; Choe, Ju-Hui; Kim, Hyun-Wook; Yoon, Yohan; Kim, Cheon-Jei

    2015-01-01

    This study aimed to investigate the effects of various mixtures of the chicken skin and wheat fiber on the properties of chicken nuggets. Two skin and fiber mixtures (SFM) were prepared using the following formulations; SFM-1: chicken skin (50%), wheat fiber (20%), and ice (30%); and SFM-2: chicken skin (30%), wheat fiber (20%), and ice (50%). Chicken nugget samples were prepared by adding the following amounts of either SFM-1 or SFM-2: 0%, 2.5%, 5%, 7.5%, and 10%. The water content for samples formulated with SFM-1 or SFM-2 was higher than in the control (pnuggets was higher than that of cooked chicken nuggets for all the samples tested. Chicken nuggets formulated with SFM-1 and SFM-2 displayed higher cooking yields than the control sample. The hardness of the control sample was also lower than the samples containing SFM-1 and SFM-2. The sensory evaluation showed no significant differences between the control and the samples containing SFM. Therefore, the incorporation of a chicken skin and wheat fiber mixture improved the quality of chicken nuggets.

  9. Prairie chicken lek survey 2012 : performance report

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Performance report for the 2012 spring prairie chicken lek surveys in Kansas state. This survey was initiated in 1963, and is preformed on established survey routes....

  10. Genetic improvement in indigenous chicken of Ethiopia

    NARCIS (Netherlands)

    Woldegiorgiss, W.E.

    2015-01-01

    Abstract Wondmeneh Esatu Woldegiorgiss (2015). Genetic improvement in indigenous chicken of Ethiopia. PhD thesis, Wageningen University, the Netherlands This thesis considered various approaches to study the potential for improvement of village poultry production system using

  11. Analysis of Consumers' Preferences and Price Sensitivity to Native Chickens.

    Science.gov (United States)

    Lee, Min-A; Jung, Yoojin; Jo, Cheorun; Park, Ji-Young; Nam, Ki-Chang

    2017-01-01

    This study analyzed consumers' preferences and price sensitivity to native chickens. A survey was conducted from Jan 6 to 17, 2014, and data were collected from consumers (n=500) living in Korea. Statistical analyses evaluated the consumption patterns of native chickens, preference marketing for native chicken breeds which will be newly developed, and price sensitivity measurement (PSM). Of the subjects who preferred broilers, 24.3% do not purchase native chickens because of the dryness and tough texture, while those who preferred native chickens liked their chewy texture (38.2%). Of the total subjects, 38.2% preferred fried native chickens (38.2%) for processed food, 38.4% preferred direct sales for native chicken distribution, 51.0% preferred native chickens to be slaughtered in specialty stores, and 32.4% wanted easy access to native chickens. Additionally, the price stress range (PSR) was 50 won and the point of marginal cheapness (PMC) and point of marginal expensiveness (PME) were 6,980 won and 12,300 won, respectively. Evaluation of the segmentation market revealed that consumers who prefer broiler to native chicken breeds were more sensitive to the chicken price. To accelerate the consumption of newly developed native chicken meat, it is necessary to develop a texture that each consumer needs, to increase the accessibility of native chickens, and to have diverse menus and recipes as well as reasonable pricing for native chickens.

  12. Analysis of Consumers’ Preferences and Price Sensitivity to Native Chickens

    Science.gov (United States)

    Lee, Min-A; Jung, Yoojin; Jo, Cheorun

    2017-01-01

    This study analyzed consumers’ preferences and price sensitivity to native chickens. A survey was conducted from Jan 6 to 17, 2014, and data were collected from consumers (n=500) living in Korea. Statistical analyses evaluated the consumption patterns of native chickens, preference marketing for native chicken breeds which will be newly developed, and price sensitivity measurement (PSM). Of the subjects who preferred broilers, 24.3% do not purchase native chickens because of the dryness and tough texture, while those who preferred native chickens liked their chewy texture (38.2%). Of the total subjects, 38.2% preferred fried native chickens (38.2%) for processed food, 38.4% preferred direct sales for native chicken distribution, 51.0% preferred native chickens to be slaughtered in specialty stores, and 32.4% wanted easy access to native chickens. Additionally, the price stress range (PSR) was 50 won and the point of marginal cheapness (PMC) and point of marginal expensiveness (PME) were 6,980 won and 12,300 won, respectively. Evaluation of the segmentation market revealed that consumers who prefer broiler to native chicken breeds were more sensitive to the chicken price. To accelerate the consumption of newly developed native chicken meat, it is necessary to develop a texture that each consumer needs, to increase the accessibility of native chickens, and to have diverse menus and recipes as well as reasonable pricing for native chickens. PMID:28747834

  13. The microbiological safety of duckweed fed chickens: a risk assessment of using duckweed reared on domestic wastewater as a protein source in broiler chickens

    Science.gov (United States)

    Moyo, S.; Dalu, J. M.; Ndamba, J.

    The possibility of transmission of pathogens from duckweed supplemented feed to chickens and consequently to the human consumer necessitated the microbiological testing of duckweed fed chickens. This assessment was thus done to determine whether there is transmission of pathogens from the duckweed supplemented feed to the chickens; determine whether such infection would be systemic or be confined to the gastro-intestinal tract of the birds; and to investigate the microbial load and distribution of the microbes with age. The study birds were sacrificed at 3, 6, 8 and 10 weeks of age and examined for the indicator organisms Escherichia coli and Salmonella spp. There was no discernible pattern in the microbial load of both the duckweed fed chickens and control birds with age although the control birds sampled clearly had a lower microbial load than the experimental flock. Some Salmonella and two enteropathogenic E. coli strains were isolated from control and experimental sub-samples at 3 weeks. There were no Salmonellae isolated in the subsequent batches of birds and feed although a number of E. coli were isolated. More isolates were obtained from the three weeks’ sub-samples (collected during wet weather) than from all the other sub-samples. The use of duckweed at this inclusion rate under the processing conditions at Nemanwa was thus concluded to be microbiologically safe as long as due caution is exercised during the processing of the duckweed and handling of the birds. There are indications that the chickens may get contaminated especially during wet weather as evidenced by the isolation of E. coli and Salmonella spp from the first batch sub-samples. This was attributed to poor environmental sanitation at the plant particularly in view of the prevailing wet conditions at the time.

  14. Effects of hatching time on behavior and weight development of chickens.

    Directory of Open Access Journals (Sweden)

    Pia Løtvedt

    Full Text Available The length of the embryonic period varies both among and within species and can affect the individual phenotype in many ways, both physiologically and behaviorally. In chickens, the hatch window may last 24-48 hours (up to 10% of the incubation time, and studies have shown that incubation length may affect post-hatch growth and physiology. However, little is known about effects on behavior. We therefore investigated how behavior variation correlates with hatching time in the early life of chickens. We also measured egg weight and egg weight loss in relation to hatching time, as well as post-hatch growth. For females, there was a negative correlation between hatch time and body weight from day 4 and throughout the experiment. For males, such a correlation was only observed when testing all hatched males up until day 10. The birds were exposed to a number of behavioral tests, and a principal components analysis was performed on the variables, resulting in four components. For the largest component, termed "Passivity", a tendency of a difference was found between early and middle male hatchers. Furthermore, a significant difference between early and middle male hatchers was found in the second component, termed "Response to novelty". In a spatial learning test, late hatchers tended to learn slower. The behavior of females was not significantly affected by hatching time in any of these tests. This study is among the first to demonstrate a link between time of hatching and early behavior in a precocial species like the chicken, and may help shedding light on the evolutionary trade-offs between incubation length and post-hatch traits. The results may also be relevant from a perspective of stress coping and therefore also for animal welfare and productivity in the chicken industry. The mechanisms linking hatching time with post-hatch phenotype remain to be investigated.

  15. Shedding light on avian influenza H4N6 infection in mallards: modes of transmission and implications for surveillance.

    Directory of Open Access Journals (Sweden)

    Kaci K VanDalen

    Full Text Available BACKGROUND: Wild mallards (Anas platyrhychos are considered one of the primary reservoir species for avian influenza viruses (AIV. Because AIV circulating in wild birds pose an indirect threat to agriculture and human health, understanding the ecology of AIV and developing risk assessments and surveillance systems for prevention of disease is critical. METHODOLOGY/PRINCIPAL FINDINGS: In this study, mallards were experimentally infected with an H4N6 subtype of AIV by oral inoculation or contact with an H4N6 contaminated water source. Cloacal swabs, oropharyngeal swabs, fecal samples, and water samples were collected daily and tested by real-time RT-PCR (RRT-PCR for estimation of viral shedding. Fecal samples had significantly higher virus concentrations than oropharyngeal or cloacal swabs and 6 month old ducks shed significantly more viral RNA than 3 month old ducks regardless of sample type. Use of a water source contaminated by AIV infected mallards, was sufficient to transmit virus to naïve mallards, which shed AIV at higher or similar levels as orally-inoculated ducks. CONCLUSIONS: Bodies of water could serve as a transmission pathway for AIV in waterfowl. For AIV surveillance purposes, water samples and fecal samples appear to be excellent alternatives or additions to cloacal and oropharyngeal swabbing. Furthermore, duck age (even within hatch-year birds may be important when interpreting viral shedding results from experimental infections or surveillance. Differential shedding among hatch-year mallards could affect prevalence estimates, modeling of AIV spread, and subsequent risk assessments.

  16. Early Holocene chicken domestication in northern China

    Science.gov (United States)

    Xiang, Hai; Gao, Jianqiang; Yu, Baoquan; Zhou, Hui; Cai, Dawei; Zhang, Youwen; Chen, Xiaoyong; Wang, Xi; Hofreiter, Michael; Zhao, Xingbo

    2014-01-01

    Chickens represent by far the most important poultry species, yet the number, locations, and timings of their domestication have remained controversial for more than a century. Here we report ancient mitochondrial DNA sequences from the earliest archaeological chicken bones from China, dating back to ∼10,000 B.P. The results clearly show that all investigated bones, including the oldest from the Nanzhuangtou site, are derived from the genus Gallus, rather than any other related genus, such as Phasianus. Our analyses also suggest that northern China represents one region of the earliest chicken domestication, possibly dating as early as 10,000 y B.P. Similar to the evidence from pig domestication, our results suggest that these early domesticated chickens contributed to the gene pool of modern chicken populations. Moreover, our results support the idea that multiple members of the genus Gallus, specifically Gallus gallus and Gallus sonneratii contributed to the gene pool of the modern domestic chicken. Our results provide further support for the growing evidence of an early mixed agricultural complex in northern China. PMID:25422439

  17. Insights into the chicken IgY with emphasis on the generation and applications of chicken recombinant monoclonal antibodies.

    Science.gov (United States)

    Lee, Warren; Syed Atif, Ali; Tan, Soo Choon; Leow, Chiuan Herng

    2017-08-01

    The advantages of chicken (Gallus gallus domesticus) antibodies as immunodiagnostic and immunotherapeutic biomolecules has only been recently recognized. Even so, chicken antibodies remain less-well characterized than their mammalian counterparts. This review aims at providing a current overview of the structure, function, development and generation of chicken antibodies. Additionally, brief but comprehensive insights into current knowledge pertaining to the immunogenetic framework and diversity-generation of the chicken immunoglobulin repertoire which have contributed to the establishment of recombinant chicken mAb-generating methods are discussed. Focus is provided on the current methods used to generate antibodies from chickens with added emphasis on the generation of recombinant chicken mAbs and its derivative formats. The advantages and limitations of established protocols for the generation of chicken mAbs are highlighted. The various applications of recombinant chicken mAbs and its derivative formats in immunodiagnostics and immunotherapy are further detailed. Copyright © 2017 Elsevier B.V. All rights reserved.

  18. Sequence and phylogenetic analysis of chicken anaemia virus obtained from backyard and commercial chickens in Nigeria : research communication

    Directory of Open Access Journals (Sweden)

    D.O. Oluwayelu

    2008-09-01

    Full Text Available This work reports the first molecular analysis study of chicken anaemia virus (CAV in backyard chickens in Africa using molecular cloning and sequence analysis to characterize CAV strains obtained from commercial chickens and Nigerian backyard chickens. Partial VP1 gene sequences were determined for three CAVs from commercial chickens and for six CAV variants present in samples from a backyard chicken. Multiple alignment analysis revealed that the 6 % and 4 % nucleotide diversity obtained respectively for the commercial and backyard chicken strains translated to only 2 % amino acid diversity for each breed. Overall, the amino acid composition of Nigerian CAVs was found to be highly conserved. Since the partial VP1 gene sequence of two backyard chicken cloned CAV strains (NGR/Cl-8 and NGR/Cl-9 were almost identical and evolutionarily closely related to the commercial chicken strains NGR-1, and NGR-4 and NGR-5, respectively, we concluded that CAV infections had crossed the farm boundary.

  19. Growing bacteria shed elicitors of Drosophila humoral immunity.

    Science.gov (United States)

    Karlsson, Jenny; Oldenvi, Sandra; Fahlander, Carina; Daenthanasanmak, Anusara; Steiner, Håkan

    2012-01-01

    It has been much debated how the Drosophila immune system can recognize bacterial peptidoglycan that is often hidden. We show that bacteria separated from Drosophila S2 cells by a semipermeable membrane can upregulate the Imd pathway. Supernatants from exponentially growing but not from stationary-phase bacterial cultures induce antimicrobial peptides. It is also made likely that the shed elicitors are of peptidoglycan nature. Copyright © 2011 S. Karger AG, Basel.

  20. Syndecan-4 shedding impairs macrovascular angiogenesis in diabetes mellitus

    Energy Technology Data Exchange (ETDEWEB)

    Li, Ran; Xie, Jun; Wu, Han; Li, Guannan; Chen, Jianzhou; Chen, Qinhua; Wang, Lian; Xu, Biao, E-mail: xubiao@medmail.com.cn

    2016-05-20

    Purpose: Syndecan-4 (synd4) is a ubiquitous heparan sulfate proteoglycan cell surface receptor that modulates cell proliferation, migration, mechanotransduction, and endocytosis. The extracellular domain of synd4 sheds heavily in acute inflammation, but the shedding of synd4 in chronic inflammation, such as diabetes mellitus (DM), is still undefined. We investigated the alterations of synd4 endothelial expression in DM and the influence of impaired synd4 signaling on angiogenesis in human umbilical vein endothelial cells (HUVECs), diabetic rats, synd4 null mice, and db/db mice. Material and methods: HUVECs were incubated with advanced glycation end products (AGEs). Western blot analysis was used to determine synd4 protein expression and ELISA was used to detect soluble synd4 fragments. The concentration of synd4 in the aortic endothelia of diabetic rats was detected by immunohistochemical staining. Aortic ring assays were performed to study the process of angiogenesis in the diabetic rats and in synd4 null and db/db mice. Recombinant adenoviruses containing the synd4 gene or null were constructed to enhance synd4 aortic expression in db/db mice. Results: Western blot analysis showed decreased expression of the synd4 extracellular domain in HUVECs, and ELISA detected increased soluble fragments of synd4 in the media. Synd4 endothelial expression in the aortas of diabetic rats was decreased. Aortic ring assay indicated impaired angiogenesis in synd4 null and db/db mice, which was partially reversed by synd4 overexpression in db/db mice. Conclusion: Synd4 shedding from vascular endothelial cells played an important role in the diabetes-related impairment of angiogenesis. -- Highlights: •Synd4 shedding from endothelial cells is accelerated under the stimulation of AGEs. •Extracellular domain of synd4 is diminished in the endothelium of DM rats. •Aortic rings of synd4 null mice showed impaired angiogenesis. •Overexpression of synd4 partly rescues macrovascular

  1. Lost bits: particle shedding with polyvinyl chloride intravenous administration sets.

    Science.gov (United States)

    Subramanian, Peter; Ainsworth, Paul; Cassey, John; Phelan, David

    2002-12-01

    Silicone particles have been demonstrated in the effluent from silicone intravenous (IV) tubing. It has been widely suspected that polyvinyl chloride (PVC) particles are also lost. We sought to clarify the situation in a carefully controlled laboratory setting using the apparatus and flow rates common in a paediatric setting, using scanning electron microscope techniques (SEM), we found that particles were indeed shed from IV tubing during use, but they were not PVC.

  2. Melatonin modulates tonic immobility and vigilance behavioural responses of broiler chickens to lighting regimens during the hot-dry season.

    Science.gov (United States)

    Sinkalu, Victor Olusegun; Ayo, Joseph O; Adelaiye, Alexander B; Hambolu, Joseph O

    2016-10-15

    Experiments were conducted with the aim of determining the influence of melatonin administration on vigilance and tonic immobility (TI) responses of Marshall broiler chickens. The broiler chickens were reared on different lighting regimens and subjected to heat stress during the hot-dry season. Simple random sampling was used to assign 300 broiler chicks into three groups, comprising 100 broiler chicks each. Group I (12D:12L cycle) was raised under natural photoperiod of 12-h light and 12-h darkness, without melatonin supplementation. Group II (CL) was kept under 24-h continuous lighting, without melatonin administration. Group III (CL+MEL) was raised under 24-h continuous lighting; with melatonin supplementation at 0.5mg/kg per os, via drinking water using a syringe. Beginning from day-old, broiler chickens in group III were individually administered with melatonin once daily for 8weeks at 17:00h. TI was induced by manual restraint, and vigilance elicited at self-righting graded for three days, two weeks apart, in 15 labeled broiler chickens from each of the three groups; at 06:00h, 13:00h and 18:00h, starting from week 4-8. Each broiler chicken was laid on its back in a U-shaped cradle, covered with cloth. Thermal microenvironment parameters of dry bulb temperature (DBT) and relative humidity (RH) were recorded at the experimental site, concurrently during the vigilance and TI tests. Inside the broiler chickens' house, the weekly temperature-humidity index (THI) was lowest at week 4 of the study, with the value of 48.60±0.08°C. At week 4, the relationship between the THI and TI induction attempts was stronger in 12D:12L cycle (r=0.589, P0.05) or CL+MEL (r=0.096, P>0.05) broiler chickens. This indicated that the broiler chickens on 12D:12L cycle were more active compared to their melatonin-treated counterparts, apparently due to adverse effects of high DBT and high RH on the broiler chickens during the hot-dry season. The highest numbers of TI induction trial

  3. Genital HSV Shedding among Kenyan Women Initiating Antiretroviral Therapy.

    Directory of Open Access Journals (Sweden)

    Griffins O Manguro

    Full Text Available Genital ulcer disease (GUD prevalence increases in the first month of antiretroviral treatment (ART, followed by a return to baseline prevalence by month 3. Since most GUD is caused by herpes simplex virus type 2 (HSV-2, we hypothesized that genital HSV detection would follow a similar pattern after treatment initiation.We conducted a prospective cohort study of 122 HSV-2 and HIV-1 co-infected women with advanced HIV disease who initiated ART and were followed closely with collection of genital swab specimens for the first three months of treatment.At baseline, the HSV detection rate was 32%, without significant increase in genital HSV detection noted during the first month or the third month of ART. HIV-1 shedding declined during this period; no association was also noted between HSV and HIV-1 shedding during this period.Because other studies have reported increased HSV detection in women initiating ART and we have previously reported an increase in GUD during early ART, it may be prudent to counsel HIV-1 infected women initiating ART that HSV shedding in the genital tract may continue after ART initiation.

  4. Exogenous nitric oxide inhibits shedding of ADAM17 substrates.

    Science.gov (United States)

    Bzowska, Monika; Stalińska, Krystyna; Mezyk-Kopeć, Renata; Wawro, Karolina; Duda, Katarzyna; Das, Sudipta; Bereta, Joanna

    2009-01-01

    Both ADAM17, the secretase responsible for the shedding of ectodomains of numerous membrane proteins including TNF and its receptors, as well as nitric oxide synthesized by inducible nitric oxide synthase play regulatory roles in inflammation and tumor progression. We analyzed the effect of endogenous and exogenous nitric oxide on the expression and activity of ADAM17 in murine endothelial cells and a monocyte/macrophage cell line. We found that endogenous nitric oxide influenced neither ADAM17 mRNA level nor the shedding of two ADAM17 substrates, TNF and TNFR1. Exogenous NO significantly diminished the release of TNF and TNFR1 without affecting the ADAM17 transcript level. Our data seem contrary to a previous report that showed the activation of ADAM17 by nitric oxide (Zhang et al., 2000, J Biol Chem 275: 15839-15844). We discuss potential mechanisms of NO-mediated inhibition of ectodomain shedding and possible reasons of discrepancy between our results and the previous report.

  5. Effect of fermented noni leaf (Morinda citrifolia L. in diets on cholesterol content of broiler chicken carcass

    Directory of Open Access Journals (Sweden)

    Erman Syahruddin

    2011-12-01

    Full Text Available Chicken meat is very nutritious. It is sometimes blamed to cause strock attack and coronary heart disease in human, because of high fat and cholesterol contents in the chicken meat. Therefore, the aim of this experiment is to evaluate the effect of fermented noni leaf levels in diets on the cholesterol content of broiler chicken carcass. The experiment was based on completely randomized design with eight experimental diets containing 0, 3, 6, 9, 12, 15, 18 and 21% of fermented noni leaf powder. All diets were formulated to contain 22% crude protein and 3000 kcal/kg. Each treatment had three replicates with ten chickens per replicate. Two hundred and forty day old unsex broiler chicks Arbor Acress were fed ad lib. for eight weeks and then sacrificed. Feed consumption, body weight gain, feed conversion ratio, and cholesterol content of carcass were taken as variable responses. Data were analyzed based on analysis of variance and orthogonal comparisons. Results showed that feed consumption, daily weight gain, FCR and carcass content were not affected by the levels of fermented noni leaf in the diet. However, cholesterol content of broiler carcass was significantly (P < 0.05 affected by the dietary treatments. Cholesterol content of the carcass was reduced processed 26.18% 73.06 to 53.76 mg/100g mg/100g chicken meat. The lowest cholesterol level was obtained by feeding the chickens with diets containing 21% fermented noni leaf.

  6. Improvement of village chicken production in a mixed (chicken-ram) farming system in Burkina Faso

    NARCIS (Netherlands)

    Kondombo, S.R.

    2005-01-01

    Keywords:Village chickens, sheep, production system, feeding, fattening, integration,Burkina Faso.Animal production in general and chickens

  7. Microbiological Safety of Chicken Litter or Chicken Litter-Based Organic Fertilizers: A Review

    Directory of Open Access Journals (Sweden)

    Zhao Chen

    2014-01-01

    Full Text Available Chicken litter or chicken litter-based organic fertilizers are usually recycled into the soil to improve the structure and fertility of agricultural land. As an important source of nutrients for crop production, chicken litter may also contain a variety of human pathogens that can threaten humans who consume the contaminated food or water. Composting can inactivate pathogens while creating a soil amendment beneficial for application to arable agricultural land. Some foodborne pathogens may have the potential to survive for long periods of time in raw chicken litter or its composted products after land application, and a small population of pathogenic cells may even regrow to high levels when the conditions are favorable for growth. Thermal processing is a good choice for inactivating pathogens in chicken litter or chicken litter-based organic fertilizers prior to land application. However, some populations may become acclimatized to a hostile environment during build-up or composting and develop heat resistance through cross-protection during subsequent high temperature treatment. Therefore, this paper reviews currently available information on the microbiological safety of chicken litter or chicken litter-based organic fertilizers, and discusses about further research on developing novel and effective disinfection techniques, including physical, chemical, and biological treatments, as an alternative to current methods.

  8. Metagenomic Analysis of Chicken Gut Microbiota for Improving Metabolism and Health of Chickens — A Review

    Directory of Open Access Journals (Sweden)

    Ki Young Choi

    2015-09-01

    Full Text Available Chicken is a major food source for humans, hence it is important to understand the mechanisms involved in nutrient absorption in chicken. In the gastrointestinal tract (GIT, the microbiota plays a central role in enhancing nutrient absorption and strengthening the immune system, thereby affecting both growth and health of chicken. There is little information on the diversity and functions of chicken GIT microbiota, its impact on the host, and the interactions between the microbiota and host. Here, we review the recent metagenomic strategies to analyze the chicken GIT microbiota composition and its functions related to improving metabolism and health. We summarize methodology of metagenomics in order to obtain bacterial taxonomy and functional inferences of the GIT microbiota and suggest a set of indicator genes for monitoring and manipulating the microbiota to promote host health in future.

  9. Physicochemical and sensory properties of chicken nuggets with washed mechanically deboned chicken meat: Research note.

    Science.gov (United States)

    Perlo, F; Bonato, P; Teira, G; Fabre, R; Kueider, S

    2006-04-01

    The effects of different proportions (0%, 10%, 20%, 30%, 40%) of washed mechanically deboned chicken meat (WM) as a substitute for hand deboned chicken meat, on the physicochemical and sensory characteristics of chicken nuggets were evaluated. The addition of WM increased fat content, but it was only significant (P0.05) in ΔE(*) color scores. The addition of WM did not affect (P>0.05) sensory attributes of chicken nuggets. From a technical viewpoint, up to 40% WM could be incorporated into nugget formulation instead of hand deboned chicken meat without affecting sensory attributes of the product. Minor changes in composition were observed but they were probably not detrimental to the product.

  10. On vortex shedding and prediction of vortex-induced vibrations of circular cylinders

    Energy Technology Data Exchange (ETDEWEB)

    Halse, Karl Henning

    1997-12-31

    In offshore installations, many crucial components can be classified as slender marine structures: risers, mooring lines, umbilicals and cables, pipelines. This thesis studies the vortex shedding phenomenon and the problem of predicting vortex-induced vibrations of such structures. As the development of hydrocarbons move to deeper waters, the importance of accurately predicting the vortex-induced response has increased and so the need for proper response prediction methods is large. This work presents an extensive review of existing research publications about vortex shedding from circular cylinders and the vortex-induced vibrations of cylinders and the different numerical approaches to modelling the fluid flow. The response predictions from different methods are found to disagree, both in response shapes and in vibration amplitudes. This work presents a prediction method that uses a fully three-dimensional structural finite element model integrated with a laminar two-dimensional Navier-Stokes solution modelling the fluid flow. This solution is used to study the flow both around a fixed cylinder and in a flexibly mounted one-degree-of-freedom system. It is found that the vortex-shedding process (in the low Reynolds number regime) is well described by the computer program, and that the vortex-induced vibration of the flexibly mounted section do reflect the typical dynamic characteristics of lock-in oscillations. However, the exact behaviour of the experimental results found in the literature was not reproduced. The response of the three-dimensional structural model is larger than the expected difference between a mode shape and a flexibly mounted section. This is due to the use of independent hydrodynamic sections along the cylinder. The predicted response is not unrealistic, and the method is considered a powerful tool. 221 refs., 138 figs., 36 tabs.

  11. Development of cyclic shedding teeth from semi-shedding teeth: the inner dental arcade of the stem osteichthyan Lophosteus

    Science.gov (United States)

    Chen, Donglei; Blom, Henning; Sanchez, Sophie; Tafforeau, Paul; Märss, Tiiu; Ahlberg, Per E.

    2017-05-01

    The numerous cushion-shaped tooth-bearing plates attributed to the stem group osteichthyan Lophosteus superbus, which are argued here to represent an early form of the osteichthyan inner dental arcade, display a previously unknown and presumably primitive mode of tooth shedding by basal hard tissue resorption. They carry regularly spaced, recumbent, gently recurved teeth arranged in transverse tooth files that diverge towards the lingual margin of the cushion. Three-dimensional reconstruction from propagation phase-contrast synchrotron microtomography (PPC-SRµCT) reveals remnants of the first-generation teeth embedded in the basal plate, a feature never previously observed in any taxon. These teeth were shed by semi-basal resorption with the periphery of their bases retained as dentine rings. The rings are highly overlapped, which evidences tooth shedding prior to adding the next first-generation tooth at the growing edge of the plate. The first generation of teeth is thus diachronous. Successor teeth at the same sites underwent cyclical replacing and shedding through basal resorption, producing stacks of buried resorption surfaces separated by bone of attachment. The number and spatial arrangement of resorption surfaces elucidates that basal resorption of replacement teeth had taken place at the older tooth sites before the addition of the youngest first-generation teeth at the lingual margin. Thus, the replacement tooth buds cannot have been generated by a single permanent dental lamina at the lingual edge of the tooth cushion, but must have arisen either from successional dental laminae associated with the individual predecessor teeth, or directly from the dental epithelium of these teeth. The virtual histological dissection of these Late Silurian microfossils broadens our understanding of the development of the gnathostome dental systems and the acquisition of the osteichthyan-type of tooth replacement.

  12. Delivery of an inactivated avian influenza virus vaccine adjuvanted with poly(D,L-lactic-co-glycolic acid) encapsulated CpG ODN induces protective immune responses in chickens.

    Science.gov (United States)

    Singh, Shirene M; Alkie, Tamiru N; Nagy, Éva; Kulkarni, Raveendra R; Hodgins, Douglas C; Sharif, Shayan

    2016-09-14

    In poultry, systemic administration of commercial vaccines consisting of inactivated avian influenza virus (AIV) requires the simultaneous delivery of an adjuvant (water-in-oil emulsion). These vaccines are often limited in their ability to induce quantitatively better local (mucosal) antibody responses capable of curtailing virus shedding. Therefore, more efficacious adjuvants with the ability to provide enhanced immunogenicity and protective anti-AIV immunity in chickens are needed. While the Toll-like receptor (TLR) 21 agonist, CpG oligodeoxynucleotides (ODNs) has been recognized as a potential vaccine adjuvant in chickens, poly(D,L-lactic-co-glycolic acid) (PLGA) nanoparticles, successfully tested as vaccine delivery systems in other species, have not been extensively explored. The present study, therefore, assessed both systemic and mucosal antibody-mediated responses following intramuscular vaccination (administered at 7 and 21days post-hatch) of chickens with PLGA encapsulated H9N2 AIV plus encapsulated CpG ODN 2007 (CpG 2007), and nonencapsulated AIV plus PLGA encapsulated CpG 2007 vaccine formulations. Virus challenge was performed at 2weeks post-secondary vaccination using the oculo-nasal route. Our results showed that chickens vaccinated with the nonencapsulated AIV vaccine plus PLGA encapsulated CpG 2007 developed significantly higher systemic IgY and local (mucosal) IgY antibodies as well as haemagglutination inhibition antibody titres compared to PLGA encapsulated AIV plus encapsulated CpG 2007 vaccinated chickens. Furthermore, chickens that received CpG 2007 as an adjuvant in the vaccine formulation had antibodies exhibiting higher avidity indicating that the TLR21-mediated pathway may enhance antibody affinity maturation qualitatively. Collectively, our data indicate that vaccination of chickens with nonencapsulated AIV plus PLGA encapsulated CpG 2007 results in qualitatively and quantitatively augmented antibody responses leading to a reduction in

  13. MCU-Based Solar Powered Chicken Feeder

    Directory of Open Access Journals (Sweden)

    Elenor M. Reyes

    2015-12-01

    Full Text Available Poultry is a great potential industry particularly in Batangas Province. The method of feeding chicken needs to be considered as chicken must be fed regularly to be more productive. The conventional method of feeding chicken is the need to continuously provide the food, be alert and conscious on the food remaining in cages and to feed the chickens in a correct period of time to avoid the decline of the production. Growers also find it difficult to manage their businesses effectively because they need to be around the cages every now and then to monitor the poultry. Timing and exactness are the key to provide a uniform time in feeding the chickens. This will benefit the owner of the business in terms of time and effort. Another advantage of this project is in terms of savings to the owner of the poultry business. This technology was designed to automatically feed chickens at a given period of time and to give alarm when the feeds are running out of supply. The power to be supplied to this prototype will be drawn from the sun by means of solar panels and will be stored in typical car battery. The feeds will be stored in a container and evenly distributed by using a conveyor to the feeding basin of the poultry. It will be more efficient than manual conventional way of feeding because less effort will be needed in feeding the chickens and less feeds will be wasted. In addition to that, the stored power can also be used for lighting purposes for the growers to save energy and energy bills.

  14. BACTERIA IN CHICKEN GASTROINTESTINAL TRACT DETECTED BY REAL TIME PCR AFTER BEE POLLEN APPLICATION IN CHICKENS DIET

    Directory of Open Access Journals (Sweden)

    Miroslava Kačániová

    2014-02-01

    Full Text Available The aim of this study was to examine the effect of pollen on the microbial colonization of chicken gastrointestinal tract. The pollen was administered to both feed mixtures in various amounts except of the control group. The addition of 50 mg pollen to 1 kg of feed was included in the first experimental group, the addition of 100 mg.kg−1 in the second experimental group, the addition of 200 mg.kg−1 the third experimental group (EG, 300 mg kg−1 in the fourth EG and 400 mg kg−1 in fifth EG. The highest count of faecal enterococci was found in the fourth experimental group (EG where 300 mg of pollen to 1 kg was added to feed mixture. The lower count of faecal enterococci was found in the first experimental group where 50 mg of pollen to 1 kg was added to feed mixture. The highest count of lactobacilli was found in the second and fifth experimental group where 100 g and 400 g of pollen to 1 kg were added to feed mixture. The lower count of lactobacilli was found in the first experimental group where 50 g of pollen to 1 kg was added to feed mixture.

  15. Tissue lipid metabolism and hepatic metabolomic profiling in response to supplementation of fermented cottonseedmeal in the diets of broiler chickens*

    Science.gov (United States)

    Nie, Cun-xi; Zhang, Wen-ju; Wang, Yong-qiang; Liu, Yan-feng; Ge, Wen-xia; Liu, Jian-cheng

    2015-01-01

    This study investigated the effects of fermented cottonseed meal (FCSM) on lipid metabolites, lipid metabolism-related gene expression in liver tissues and abdominal adipose tissues, and hepatic metabolomic profiling in broiler chickens. One hundred and eighty 21-d-old broiler chickens were randomly divided into three diet groups with six replicates of 10 birds in each group. The three diets consisted of a control diet supplemented with unfermented cottonseed meal, an experimental diet of cottonseed meal fermented by Candida tropicalis, and a second experimental diet of cottonseed meal fermented by C. tropicalis plus Saccharomyces cerevisae. The results showed that FCSM intake significantly decreased the levels of abdominal fat and hepatic triglycerides (Pbroiler chickens and demonstrated the great potential of nutrimetabolomics in researching complex nutrients added to animal diets. PMID:26055906

  16. Effect of antibiotic, Lacto-lase and probiotic addition in chicken feed on protein and fat content of chicken meat

    Science.gov (United States)

    Azhar, Noor Amiza; Abdullah, Aminah

    2015-09-01

    This research was conducted to investigate the effect of chicken feed additives (antibiotic, Lacto-lase® and probiotic) on protein and fat content of chicken meat. Chicken fed with control diet (corn-soy based diet) served as a control. The treated diets were added with zinc bacitracin (antibiotic), different amount of Lacto-lase® (a mixture of probiotic and enzyme) and probiotic. Chicken were slaughtered at the age of 43-48 days. Each chicken was divided into thigh, breast, drumstick, drumette and wing. Protein content in chicken meat was determined by using macro-Kjeldahl method meanwhile Soxhlet method was used to analyse fat content. The result of the study showed that the protein content of chicken breast was significantly higher (p≤0.05) while thigh had the lowest protein content (p≤0.05). Antibiotic fed chicken was found to have the highest protein content among the treated chickens but there was no significant different with 2g/kg Lacto-lase® fed chicken (p>0.05). All thighs were significantly higher (p≤0.05) in fat content except for drumette of control chicken while breast contained the lowest fat content compared to other chicken parts studied. The control chicken meat contained significantly higher (p≤0.05) amount of fat compared to the other treated chickens. Chicken fed with 2g/kg Lacto-lase® had the lowest (p≤0.05) fat content. The result of this study indicated that the addition of Lacto-lase® as a replacement of antibiotic in chicken feed will not affect the content of protein and fat of chicken meat.

  17. Salmonella Enteritidis experimental infection in chickens: Effects of ...

    African Journals Online (AJOL)

    Salmonella enterica serovar Enteritidis is a food borne pathogen of humans causing food-poisoning and sometimes deaths. In order to control egg-borne transmission of Salmonella Enteritidis to humans, prompt and accurate detection of infected poultry flocks is essential. This paper examined the effects of challenge dose ...

  18. Salmonella Enteritidis experimental infection in chickens: Effects of ...

    African Journals Online (AJOL)

    STORAGESEVER

    2008-10-20

    USDA), Athens, USA. Accepted 6 ... Salmonella enterica serovar Enteritidis is a food borne pathogen of humans causing food-poisoning .... Comparison of percent sero-positive hens per group and means of Salmonella.

  19. Avian toxoplasmosis: experimental infection of chicken and pigeon.

    Science.gov (United States)

    Biancifiori, F; Rondini, C; Grelloni, V; Frescura, T

    1986-01-01

    Two groups of 13 new-laying hens each were infected by crop-route with 5000 and 50,000 infective oocysts of T. gondii. Four groups of 5 pigeons each were inoculated by crop-route with 50, 500, 1000 and 5000 infective oocysts. To each group of infected birds suitable controls were added. Hens from the experiment with 5000 infective oocysts were apparently resistant to the infection and they had no clinical signs in the succeeding 40 days p.i. Hens from the experiment with 50,000 infective oocysts showed an egg-drop and mortality in embryonated eggs, especially during the first 2 weeks p.i. Isolation of the parasite was unsuccessfully attempted from 720 embryonated eggs, produced by infected groups, and tested on various days p.i. and at different stages of infection. The parasite was isolated from the brain, heart, liver, spleen and lung of infected birds 7 and 15 days p.i.; 40 days p.i. it was evident only in brain and heart. IgG onset and mean course were monitored by ELISA and high titers were reached by both groups. Pigeons from groups 500, 1000 and 5000 developed rapidly progressive clinical signs as diarrhea, trembling, incoordination, torticollis and death. They had enlargement of liver and spleen and focal necrosis, nodular features in the crop. Pigeons from expt 50 had no clinical signs in spite of the presence of the parasite in their organs for over 45 days p.i. Parasite was isolated from brain, heart, liver, spleen, lung, kidney, crop and muscles from all infected groups. Histopathological and ultrastructural features revealed the presence of multiplying tachizoites even within cells of the crop. Seroconversion, as monitored by ELISA, was recorded in all infected groups although high ELISA-titres were never reached. One of the negative controls from expt 5000 developed specific antibodies but the parasite was not isolated from its organs.

  20. Development of Local Chicken Production Based on Local Feed Ingredients

    Directory of Open Access Journals (Sweden)

    Cecep Hidayat

    2012-06-01

    Full Text Available Development of local chicken production based on local feed ingredient is in line with the vision of Indonesian goverment to fulfill meat and egg national requirement based on local resources. There are two big problem which become stumblingblock in developing local chicken production. The first problem is the difficulty to get day old chick of local chicken. This problem can be solved by integrating breeder institutions belong to goverment with research institution and with local chicken producer association. The second problem is the low performance of local chicken. To improve local chicken performance, it can be done by improving the breed, feed and management. Several research results show that good performance of local chicken were obtained by inclusion of local feed ingredients in the ration. Therefore, development of local chicken production based an local feed resources can be applied.

  1. Carcass characteristics of South African native chicken lines

    African Journals Online (AJOL)

    Unknown

    Carcass mass and fat content of the native chicken lines were less than in a ... Dry matter, organic matter and crude protein concentrations of minced carcass .... characteristics and consumer acceptability of meat from native chicken lines.

  2. Haematological and serum biochemical profiles of broiler chickens ...

    African Journals Online (AJOL)

    MOLM) on the haematological and serum biochemical profile of broiler chickens. Fresh Moringa leaves (FML) were shade-dried for four days and milled into meal. A total of two hundred broilers unsexed chickens (Anak strain) were randomly ...

  3. Prior infection of chickens with H1N1 or H1N2 avian influenza elicits partial heterologous protection against highly pathogenic H5N1.

    Directory of Open Access Journals (Sweden)

    Charles Nfon

    Full Text Available There is a critical need to have vaccines that can protect against emerging pandemic influenza viruses. Commonly used influenza vaccines are killed whole virus that protect against homologous and not heterologous virus. Using chickens we have explored the possibility of using live low pathogenic avian influenza (LPAI A/goose/AB/223/2005 H1N1 or A/WBS/MB/325/2006 H1N2 to induce immunity against heterologous highly pathogenic avian influenza (HPAI A/chicken/Vietnam/14/2005 H5N1. H1N1 and H1N2 replicated in chickens but did not cause clinical disease. Following infection, chickens developed nucleoprotein and H1 specific antibodies, and reduced H5N1 plaque size in vitro in the absence of H5 neutralizing antibodies at 21 days post infection (DPI. In addition, heterologous cell mediated immunity (CMI was demonstrated by antigen-specific proliferation and IFN-γ secretion in PBMCs re-stimulated with H5N1 antigen. Following H5N1 challenge of both pre-infected and naïve controls chickens housed together, all naïve chickens developed acute disease and died while H1N1 or H1N2 pre-infected chickens had reduced clinical disease and 70-80% survived. H1N1 or H1N2 pre-infected chickens were also challenged with H5N1 and naïve chickens placed in the same room one day later. All pre-infected birds were protected from H5N1 challenge but shed infectious virus to naïve contact chickens. However, disease onset, severity and mortality was reduced and delayed in the naïve contacts compared to directly inoculated naïve controls. These results indicate that prior infection with LPAI virus can generate heterologous protection against HPAI H5N1 in the absence of specific H5 antibody.

  4. Surfactant shedding and gas diffusion during pulsed ultrasound through a microbubble contrast agent suspension.

    Science.gov (United States)

    O'Brien, Jean-Pierre; Stride, Eleanor; Ovenden, Nicholas

    2013-08-01

    Interest in coated microbubbles as agents for therapeutic and quantitative imaging applications in biomedical ultrasound has increased the need for their accurate theoretical characterization. Effects such as gas diffusion, variation in the properties of the coating and the resulting changes in bubble behavior under repeated exposure to ultrasound pulses are, however, still not well understood. In this study, a revised equation for microbubble motion is proposed that includes the effects of gas diffusion, as well as adsorption, desorption and shedding of a surfactant from the bubble surface. This is incorporated into a nonlinear wave propagation model to account for these additional time dependent effects in the response of microbubble populations. The results from the model indicate there can be significant changes in both bubble behavior and the propagated pulse over time. This is in agreement with existing experimental data but is not predicted by existing propagation models. The analysis indicates that changes in bubble dynamics are dominated by surfactant shedding on the timescale of a diagnostic ultrasound pulse and gas diffusion over the timescale of the pulse repetition frequency. The implications of these results for the development of more accurate algorithms for quantitative imaging and for therapeutic applications are discussed.

  5. Prediction of vortex-shedding noise from the blunt trailing edge of a flat plate

    Science.gov (United States)

    Wu, Long; Jing, Xiaodong; Sun, Xiaofeng

    2017-11-01

    A time-domain hybrid approach for aerodynamic noise prediction is developed based on a discrete vortex model (DVM) for the unsteady incompressible flow simulation and the acoustic perturbation equations (APE) for the acoustical field computation. The aim is to assess the applicability of the present DVM-APE method to the problems where sound is generated by the large-scale coherent flow structures. The hybrid DVM-APE approach is employed to predict the vortex-shedding noise from the blunt trailing edge of a flat plate. Simulations are implemented on flat plates with different thicknesses in a certain range of low Mach numbers, in order to identify the scaling dependence of the vortex-shedding noise on the freestream speed as well as the plate thickness. Acoustical directivity patterns at different Helmholtz numbers are presented, and agreements are achieved when compared with previous studies. A comparison of the sound pressure level spectrum between the present DVM-APE simulation and the published experimental results is also presented, showing good agreements for both the peak frequencies and the sound pressure levels.

  6. Numerical investigation of vortex shedding and vortex-induced vibration for flexible riser models

    Directory of Open Access Journals (Sweden)

    Zheng-Shou Chen

    2010-06-01

    Full Text Available The numerical study about the vortex-induced vibration and vortex shedding in the wake has been presented. Prior to the numerical simulation of flexible riser systems concerning engineering conditions, efficiency validating of the proposed FSI solution method have been performed. The comparison between numerical simulation and published experimental data shows that the CFD method designed for FSI solution could give acceptable result for the VIV prediction of flexible riser/pipe system. As meaningful study on VIV and vortex shedding mode with the focus on flexible riser model systems, two kinds of typical simulation cases have been carried out. One was related to the simulation of vortex visualization in the wake for a riser model subject to forced oscillation, and another was related to the simulation of fluid-structure interaction between the pipes of coupled multi-assembled riser system. The result from forced oscillation simulation shows that the vortex-induced vibration with high response frequency but small instantaneous vibration amplitude contributes to vortex conformation as much as the forced oscillation with large normalized amplitude does, when the frequency of forced oscillation was relatively high. In the multi-assembled riser systems, it has been found that the external current velocity and the distance between two pipes are the critical factors to determine the vibration state and the steady vibration state emerging in quad-pipe system may be destroyed more easily than dual-pipe system.

  7. Consumer Likelihood to Purchase Chickens with Novel Production Attributes

    OpenAIRE

    Bernard, John C.; Pesek, John D., Jr.; Pan, Xiqian

    2007-01-01

    Typical supermarket chickens are produced with novel or controversial attributes. This continues despite contrasting growth in consumer interest in organic and natural foods. This study surveyed Delaware consumers’ likelihood to purchase chicken given different attributes: free range, given antibiotics, irradiated, fed genetically modified (GM) fee, GM chicken, and price. Examining conjoint analysis data with a heteroskedastic two-limit tobit model, GM chicken and other novel attributes wer...

  8. The ethics of human-chicken relationships in video games

    OpenAIRE

    Flick, Catherine; Fothergill, B. Tyr

    2015-01-01

    In this paper, we look at the historical place that chickens have held in media depictions and as entertainment, analyse several types of representations of chickens in video games, and draw out reflections on society in the light of these representations. We also look at real-life, modern historical, and archaeological evidence of chicken treatment and the evolution of social attitudes with regard to animal rights, and deconstruct the depiction of chickens in video games in this light.

  9. Parallel Evolution of Polydactyly Traits in Chinese and European Chickens

    OpenAIRE

    Zebin Zhang; Changsheng Nie; Yaxiong Jia; Runshen Jiang; Haijian Xia; Xueze Lv; Yu Chen; Junying Li; Xianyao Li; Zhonghua Ning; Guiyun Xu; Jilan Chen; Ning Yang; Lujiang Qu

    2016-01-01

    Polydactyly is one of the most common hereditary congenital limb malformations in chickens and other vertebrates. The zone of polarizing activity regulatory sequence (ZRS) is critical for the development of polydactyly. The causative mutation of polydactyly in the Silkie chicken has been mapped to the ZRS; however, the causative mutations of other chicken breeds are yet to be established. To understand whether the same mutation decides the polydactyly phenotype in other chicken breeds, we det...

  10. Neisseria gonorrhoeae co-infection exacerbates vaginal HIV shedding without affecting systemic viral loads in human CD34+ engrafted mice.

    Science.gov (United States)

    Xu, Stacey X; Leontyev, Danila; Kaul, Rupert; Gray-Owen, Scott D

    2018-01-01

    HIV synergy with sexually transmitted co-infections is well-documented in the clinic. Co-infection with Neisseria gonorrhoeae in particular, increases genital HIV shedding and mucosal transmission. However, no animal model of co-infection currently exists to directly explore this relationship or to bridge the gap in understanding between clinical and in vitro studies of this interaction. This study aims to test the feasibility of using a humanized mouse model to overcome this barrier. Combining recent in vivo modelling advancements in both HIV and gonococcal research, we developed a co-infection model by engrafting immunodeficient NSG mice with human CD34+ hematopoietic stem cells to generate humanized mice that permit both systemic HIV infection and genital N. gonorrhoeae infection. Systemic plasma and vaginal lavage titres of HIV were measured in order to assess the impact of gonococcal challenge on viral plasma titres and genital shedding. Engrafted mice showed human CD45+ leukocyte repopulation in blood and mucosal tissues. Systemic HIV challenge resulted in 104-105 copies/mL of viral RNA in blood by week 4 post-infection, as well as vaginal shedding of virus. Subsequent gonococcal challenge resulted in unchanged plasma HIV levels but higher viral shedding in the genital tract, which reflects published clinical observations. Thus, human CD34+ stem cell-transplanted NSG mice represent an experimentally tractable animal model in which to study HIV shedding during gonococcal co-infection, allowing dissection of molecular and immunological interactions between these pathogens, and providing a platform to assess future therapeutics aimed at reducing HIV transmission.

  11. Influence of vitamin D on fecal shedding of Escherichia coli O157:H7 in naturally colonized cattle.

    Science.gov (United States)

    Edrington, Tom S; Farrow, Russell L; Mackinnon, Kathryn M; Callaway, Todd R; Anderson, Robin C; Nisbet, David J

    2012-02-01

    Three experiments were conducted to evaluate the influence of vitamin D on fecal shedding of Escherichia coli O157:H7 in cattle. In the first experiment, two groups of cattle (beef and dairy) were assigned to a control treatment or to receive 0.5 × 10(6) IU vitamin D per day via oral bolus for 10 days. Fecal samples were collected before and throughout the dosing period for culture of E. coli O157:H7. No differences were observed for fecal shedding of E. coli O157:H7 among treatments for either beef or dairy animals. Serum concentrations of vitamin D were markedly higher (P vitamin D dosages (2,400, 4,800, and 9,600 IU/day; 14 days each) were administered to 14 dairy steers (7 steers served as controls), fecal samples were collected daily, and serum samples were collected weekly throughout the 42-day experimental period. No significant differences in fecal prevalence or serum vitamin D concentrations were observed for any of the vitamin D dosages. A third experiment sampled feedlot cattle (winter and summer) to determine whether serum vitamin D concentrations were correlated with fecal shedding of E. coli O157:H7. A fecal sample and a blood sample were obtained in each season from 60 randomly selected animals (total of 120 fecal samples and 120 corresponding blood samples). As expected, season was highly correlated (r = 0.66) with serum vitamin D concentration with higher concentrations (P coli O157:H7 prevalence (percentage of positive samples) was not highly correlated (r = 0.16) with season, although the correlation tended to be significant (P = 0.08). The proportion of cattle shedding E. coli O157:H7 was 16.7 and 6.7% for the summer and winter collections, respectively. Results of this research do not support a correlation between vitamin D intake and E. coli O157:H7 shedding in cattle.

  12. SE83-9 'Chix in Space' student experimenter monitors STS-29 onboard activity

    Science.gov (United States)

    1989-01-01

    Student experimenter John C. Vellinger watches monitor in the JSC Mission Control Center (MCC) Bldg 30 Customer Support Room (CSR) during the STS-29 mission. Crewmembers are working with his Student Experiment (SE) 83-9 Chicken Embryo Development in Space or 'Chix in Space' onboard Discovery, Orbiter Vehicle (OV) 103. The student's sponsor is Kentucky Fried Chicken (KFC).

  13. Comparative study of the effect of Immunowall and Avilamycin on antibody titre against Newcastle B1 vaccine in broiler chickens

    Directory of Open Access Journals (Sweden)

    A Zakeri

    2007-11-01

    Full Text Available The purpose of the present study was to comparatively investigate the effect of Avilamycin and Immunowall on the improvement of humoral immunity in boiler chickens. In this study, 360 cobb broiler chickens were divided into three similar groups of 120 chickens with four replicates of 30 chickens in each group. In the first and second experimental groups, 1 kg/ton of Immunowall and Avilamycin respectively were added to the basic diet while in the third control group only the basic diet was used. On days 9, 17 and 25 of the breeding period (corresponding to 1 day before and 7 and 14 days after the first Newcastle B1 vaccination, 40 chickens were randomly chosen in each experimental group, their blood samples collected, and then serum antibody titres of these chickens against the Newcastle vaccine were measured by HI test. After stastistical analysis using ANOVA and Duncans’s multiple range test, the results of serum antibody titres by HI test on day 9 of the breeding period was not statistically significant. The results of HI test on day 17 of the breeding period (5.01 ± 0.32, 5.27 ± 0.27 and 5.13 ± 0.20 in the control and experimental groups 1 and 2 respectively was also statistically not significant. The HI test results on day 25 of the breeding period (5.04 ± 0.44, 5.87 ± 0.47 and 5.61 ± 0.41 in the control and experimental groups 1 and 2 respectively indicated significant statistical differences (P

  14. A chicken consultation with ramifications.

    Science.gov (United States)

    Opitz, John M

    2005-04-15

    In Madison I once worked with two postdoctoral fellows who had spent their youth in New York City and who, when asked what birds they knew both responded "why, pigeons and LBJ's!" (little brown jobbies). Despite their undoubted brilliance, they clearly had an educational deficiency not fixed by buying eggs and poultry at a grocery store. Though of enormous economic and nutritional importance to humans, turkeys and chickens constitute only a minute fraction of the disappearing avian life in our ecology. One could easily teach an entire middle or high school biology course around the reproduction, embryology, evolution, genetics, anatomy, special adaptations, virology, bacteriology, taxonomy, behavior, and extinctions of birds, as paradigmatic of all of life. Where would developmental or evolutionary biology be without the Galapagos finches, chick embryo, or neurobiology without the Zebra Finch? The modifications of the original red jungle fowl of India and South East Asia into hundreds of races through artificial selection and breeding practices provide as beautiful an example of developmental plasticity, well-known to Darwin, as the domestic dog, cat, laboratory mice, and guinea pigs. In what follows I have begun to repay my indebtedness to my mentor Emil Witschi who introduced me to developmental biology, physiology, and genetics and its historical study on the basis of birds (and amphibians); and to Mark Leppert, Professor of Human Genetics at the University of Utah for collaborative support, and bird-watching fieldtrips. (c) 2005 Wiley-Liss, Inc.

  15. Trichomonas vaginalis treatment reduces vaginal HIV-1 shedding.

    Science.gov (United States)

    Kissinger, Patricia; Amedee, Angela; Clark, Rebecca A; Dumestre, Jeanne; Theall, Katherine P; Myers, Leann; Hagensee, Michael E; Farley, Thomas A; Martin, David H

    2009-01-01

    Vaginal HIV-1 shedding has been associated with Trichomonas vaginalis (TV) infection and could play a role in HIV transmission. The purpose of the study was to examine if effective TV treatment reduces the presence of vaginal HIV-1 RNA. TV+ women attending an HIV outpatient clinic in New Orleans, LA, who resolved infection (n = 58) and TV-negative controls (n = 92), matched on antiretroviral therapy (ART) were examined and interviewed at baseline, 1, and 3 months. TV status was tested by culture and the amount of cell free HIV-1 RNA in the vaginal fluids was determined by the Amplicor HIV-1 Monitor ultrasensitive assay. : Most women (81.3%) were black and the mean age was 37.5 (SD 8.7). At baseline, 46.0% had plasma HIV-1 RNA >/=10,000 copies/mL, 26.4% had CD4<200 cells/muL, 54.7% were taking ART, and only 26.0% had detectable HIV-1 RNA in their vaginal fluids. TV-positive women who were effectively treated for TV were less likely to shed HIV vaginally at 3-months post-treatment compared to baseline (R.R. 0.34, 95% CI: 0.12-0.92, P = 0.03), whereas there was no change for TV-negative women. This study provides additional support that reducing TV infection among HIV-positive women may have an impact on the prevention of HIV transmission. Reasons for the delayed treatment effect and the effect on cervical shedding need further investigation.

  16. Vortex shedding noise of a cylinder with hairy flaps

    Science.gov (United States)

    Kamps, Laura; Geyer, Thomas F.; Sarradj, Ennes; Brücker, Christoph

    2017-02-01

    This study describes the modification of acoustic noise emitted from cylinders in a stationary subsonic flow for a cylinder equipped with flexible hairy flaps at the aft part as a passive way to manipulate the flow and acoustics. The study was motivated by the results from previous water tunnel measurements, which demonstrated that hairy flaps can modify the shedding cycle behind the cylinder and can reduce the wake deficit. In the present study, wind tunnel experiments were conducted on such a modified cylinder and the results were compared to the reference case of a plain cylinder. The acoustic spectrum was measured using two microphones while simultaneously recording the flap motion. To further examine the flow structures in the downstream vicinity of the cylinder, constant temperature anemometry measurements as well as flow visualizations were also performed. The results show that, above a certain Reynolds number, the hairy flaps lead to a jump in the vortex shedding frequency. This phenomenon is similarly observed in the water flow experiments as a jump in the non-dimensional Strouhal number that is related to the change of the shedding cycle. This jump appears to be coupled to a resonant excitation of the flaps. The specific Reynolds number at which the jump occurs is higher in the present case, which is attributed to the lower added mass in air as compared with the one in water. The flow visualizations confirmed that such action of the flaps lead to a more slender elongated shape of the time-averaged separation bubble. In addition, the hairy flaps induce a noticeable reduction of the tonal noise as well as broadband noise as long as the flaps do not touch each other.

  17. RAW CHICKEN LEG AND BREAST SENSORY EVALUATION

    Directory of Open Access Journals (Sweden)

    Octavian Baston

    2010-01-01

    Full Text Available In the paper we presented a method of sensorial evaluation for chicken meat (red and white. This is a descriptive method of analysis. It was perform with trained assessors for chicken refrigerated raw meat organoleptical evaluation. The sensorial attributes considered were: external aspect of anatomical part of chicken analyzed by slime, the surface odor, the skin and muscle color and muscular elasticity. Color was determined for the skin and white and red muscles. Our scale of analysis is formed by three values that characterize each quality attribute. The trained assessor appreciated the sensorial quality of raw anatomical part of chicken as excellent, acceptable and unacceptable. The objectives were: to establish the sensorial attributes to be analyzed for each type of muscular fiber, to describe the quality of each considered attribute and to realize a sensorial scale of quantification for the considered sensorial attributes. Our purpose was to determine the quality of the red and white refrigerated raw chicken anatomical parts (respectively for legs and breasts after one week of storage.

  18. Vortex Shedding from Tapered Cylinders at high Reynolds Numbers

    DEFF Research Database (Denmark)

    Johansson, Jens; Andersen, Michael Styrk; Christensen, Silas Sverre

    2015-01-01

    : Helical strakes are known to reduce or suppress vortex-induced vibrations (VIV) of circular structures. The design of the strakes is generally recommended to be a triple-start helical strake system, with a strake height corresponding to approximately 10 percent of the structures diameter and 15...... percent for strakes of circular cross section. The present paper argues that this height can be reduced for structures where the critical wind velocity for vortex shedding is in the Supercritical Reynolds number regime. The present investigations are aimed for suppressing VIV on offshore wind turbine...

  19. Changes in apparent metabolizable energy and digestive tract of broiler chickens fed diets containing irradiated meat-bone meal

    Science.gov (United States)

    Al-Masri, M. R.

    2003-05-01

    Experiments have been carried out to study the effect of feeding broiler chickens with irradiated meat-bone meal (0, 5, 10, 25, 50 kGy), at a rate of 100 g/kg diet, on the apparent metabolizable energy (AME) values, using total collection of feed and excreta, during different age periods (14-21, 21-28, 28-35 and 35-42 days) and on the biological aspects of the digestive organs during the last 4 weeks of chickens'age (14-42 days). Results indicated that feeding of broiler chickens with diets containing irradiated meat-bone meal had insignificant effects on the AME values which amounted to an average of 18.6 MJ/kg diet during the four weeks of experimental periods. The AME values increased significantly by 0.36-0.99 MJ/kg diet during the late fourth age period compared with the other earlier three age periods. No significant difference was noticed in the AME values between the second and third experimental age periods. Feeding chickens with irradiated meat-bone meal for 4 weeks (14-42 day of age) had no significant effects on the relative weights of crop, proventriculus, gizzard, duodenum, jejunum, ileum, caeca, colon, pancreas and liver. Therefore, radiation sterilized meat-bone meal could be used as feedstuff in poultry diets without any deleterious effect on the diet energy utilization and biological aspects of chickens'digestive tract.

  20. Rapid identification of chicken anemia virus in Nigerian backyard ...

    African Journals Online (AJOL)

    SERVER

    African Journal of Biotechnology Vol. 7 (3), pp. 271-275, 5 February, 2008 ... Key words: Chicken anemia virus, polymerase chain reaction, backyard chickens, restriction endonuclease analysis. INTRODUCTION. Chicken anemia virus (CAV) is a small, .... The enzyme reaction was stopped with 25 µl of 0.5 M H2SO4 and ...

  1. The place and importance of indigenous chicken in a subsistence ...

    African Journals Online (AJOL)

    The place and importance of indigenous chicken in a subsistence economy. ... Journal of Agriculture, Forestry and the Social Sciences ... Subsistence chicken production contributes directly to the social and economic well-being of the family while the chicken itself is described as the commonest economic resource ...

  2. Body dimensions of Fulani and Yoruba ecotype chickens under ...

    African Journals Online (AJOL)

    Wing length also changed in the same way from week 7 for females and week 9 for males to favour values recorded for the Yoruba ecotype chickens. All other parameters were higher (p>0.05) for the Fulani ecotype chickens. It was concluded that the Fulani ecotype chicken has potentials to be selected as meat type ...

  3. Genetic variation of indigenous chicken breeds in China and a ...

    African Journals Online (AJOL)

    huis

    The UPGMA based tree yielded two clusters for the 13 chicken breeds, with the Recessive White chickens forming a distinct cluster. ... poultry industry in China and even for the rest of the world. The 12 chicken ..... For the cluster analysis of AFLP banding patterns, the unweighted pair-group method (UPGMA) using average ...

  4. Assessing the genetic diversity of five Tanzanian chicken ecotypes ...

    African Journals Online (AJOL)

    Charles Moses Lyimo

    2013-12-21

    Dec 21, 2013 ... Animal Science. Abstract. The study aimed to evaluate the genetic diversity of Tanzanian chicken populations through phylogenetic relationship, and to trace the history of Tanzanian indigenous chickens. Five ecotypes of. Tanzanian local chickens (Ching'wekwe, Kuchi, Morogoro-medium, Pemba and ...

  5. Performance of Chickens under Semi-scavenging Conditions: A ...

    African Journals Online (AJOL)

    Monthly income obtained from chickens in the participating households was between 100/= and 90,000/= Tanzanian Shillings (TAS) with a mean of 11,777.55/= TAS. Chicken production constraints identified included diseases and parasites, unavailability of feeds during the dry season, theft, lack of chicken management ...

  6. Feeding Effect of the Addition of Linoleic Acid on Meat Quality of Chickens

    Directory of Open Access Journals (Sweden)

    Simona Kunová

    2016-01-01

    Full Text Available The aim of this study was to analyse the influence of linoleic acid which was added in the broiler chickens feed mixtures in relation to chemical composition of meat, content of fatty acids and composition of blood serum. There were compared the characteristics of two groups of ROSS 308 chickens in the experiment (the experimental group with 5% addition of linoleic acid and the control group. The protein content of breast was significantly lower (P ≤ 0.05 in the experimental group than in the control group. There were found significant differences (P ≤ 0.05 in the protein content between sexes. There was found statistically significant (P ≤ 0.01 higher fat content in the breast of experimental group in comparison with control group. Statistically significant differences (P ≤ 0.05 were found in fat from the thigh meat of experimental group than the control group. The analysis of the chemical composition showed higher content of fat in the breast (1.9 g.100 g−1 than in the thigh (11.66 g.100 g−1 of chickens which were fed with the addition of linoleic acid to feed mixture. This resulted in lower share of the other components. The addition of linoleic acid in the chickens feed mixture showed significantly higher proportion of polyunsaturated fatty acids to saturated fatty acids (0.76. Analysis of blood serum showed higher concentration of chlorides (P ≤ 0.01 in the group with the addition of linoleic acid than the control group. Proportion of monounsaturated fatty acids was 47.06% in the experimental group and significantly higher one (53.77% was found in the control group.

  7. Protection level of AI H5N1 vaccine clade 2.1.3 commercial against AI H5N1 clade 2.3.2 virus from Ducks to SPF chicken in laboratory conditions

    Directory of Open Access Journals (Sweden)

    Indriani R

    2015-03-01

    Full Text Available Highly Pathogenic Avian Influenza (HPAI subtype H5N1 clade 2.3.2 has infected chickens in farms, causing mortality and a decrease in egg production. Vaccination is one of the strategies to control disease of AI subtype H5N1. AI H5N1 clade 2.1.3 vaccine is available commercially. The effectiveness of two vaccines of AI H5N1 clade 2.1.3 (product A and B, and AI H5N1 clade 2.3.2 (Sukoharjo against AI H5N1 clade 2.3.2 (Sukoharjo virus SPF chickens was tested in laboratory. Four groups of SPF chickens were used in this study, there were (1 vaccinated with H5N1 clade 2.1.3 (product A, (2 vaccinated with H5N1 clade 2.1.3 (product B, (3 vaccinated with AI H5N1 clade 2.3.2 and (4 unvaccinated (as a control. Each vaccinated group consisted of 10 chicken except 8 chicken for control group. SPF chicken were vaccinated with 1 dose of vaccine at 3 weeks olds, and then after 3 weeks post vaccination (at 6 weeks olds. All group of chicken were challenged with 106 EID50 per 0.1 ml via intranasal. The results showed, chicken vaccinated with H5N1 clade 2.1.3 product A and B gave 100 and 80% protection respectively, but showed challenged virus shedding, whereas vaccine of H5N1 clade 2.3.2 gave 100% protection from mortality and without virus shedding. Vaccines of AI H5N1 clade 2.1.3 product A was better than vaccine product B, and when chicken vaccinated against H5N1 clade 2.3.2, H5N1 clade 2.3.2 vaccine was the best to be used. In order to protect chicken from AI subtype H5N1 clade 2.1.3 and 2.3.2 in the field, a bivalent vaccine of H5N1 clade 2.1.3 and 2.3.2 subtypes should be developed.

  8. Aetheroleum and fat oxidation of chicken meat

    Directory of Open Access Journals (Sweden)

    Jana Tkáčová

    2013-03-01

    Full Text Available 1024x768 The quality of meat changges during storage. The experiment was performed on the final fattening type of chickens COBB 500. Chickens were fed by feed mixture with   aetheroleum. Premix of aetheroleum  contained  aetheroleum from Origanum vulgare L. (30 g, Thymus vulgaris L. (10 g and Cinnamomum zeylanicum (10 g. The carcass was stored at -18 °C in a freezer box. Acid number of fat in chicken meat was ranged from 4.74 to 14.57 mg KOH/g fat after 9 months and after 12 months was ranged from 5.75 to 9.11 mg KOH/g fat.doi:10.5219/267   Normal 0 false false false EN-US X-NONE X-NONE

  9. The microbiome of the chicken gastrointestinal tract.

    Science.gov (United States)

    Yeoman, Carl J; Chia, Nicholas; Jeraldo, Patricio; Sipos, Maksim; Goldenfeld, Nigel D; White, Bryan A

    2012-06-01

    The modern molecular biology movement was developed in the 1960s with the conglomeration of biology, chemistry, and physics. Today, molecular biology is an integral part of studies aimed at understanding the evolution and ecology of gastrointestinal microbial communities. Molecular techniques have led to significant gains in our understanding of the chicken gastrointestinal microbiome. New advances, primarily in DNA sequencing technologies, have equipped researchers with the ability to explore these communities at an unprecedented level. A reinvigorated movement in systems biology offers a renewed promise in obtaining a more complete understanding of chicken gastrointestinal microbiome dynamics and their contributions to increasing productivity, food value, security, and safety as well as reducing the public health impact of raising production animals. Here, we contextualize the contributions molecular biology has already made to our understanding of the chicken gastrointestinal microbiome and propose targeted research directions that could further exploit molecular technologies to improve the economy of the poultry industry.

  10. Comparison of amino acid digestibility in full-fat soybean, two soybean meals, and peanut flour between broiler chickens and growing pigs.

    Science.gov (United States)

    Park, C S; Helmbrecht, A; Htoo, J K; Adeola, O

    2017-07-01

    The aim of this study was to determine the apparent ileal digestibility (AID) and the standardized ileal digestibility (SID) of CP and AA in full-fat soybean (FFSB), solvent-extracted soybean meal containing 430 g/kg CP (SBM-43), solvent-extracted soybean meal containing 470 g/kg CP (SBM-47), and peanut flour (PNF) fed to broiler chickens and pigs and to compare the digestibility of CP and AA between broiler chickens and pigs. Four diets were prepared to contain FFSB, SBM-43, SBM-47, and PNF as the sole source of N. A N-free diet was formulated to estimate the basal ileal endogenous losses of CP and AA for broiler chickens and pigs. In Exp. 1, a total of four hundred sixteen 21-d-old male broiler chickens (922.1 ± 79.9 g initial BW) were assigned to 5 experimental diets in a randomized complete block design with BW as a blocking factor. After 5 d of adaptation, ileal digesta samples were collected after birds were euthanized by CO asphyxiation. In Exp. 2, twenty barrows (62.0 ± 6.9 kg initial BW) surgically fitted with T-cannulas at the distal ileum were allotted to 5 experimental diets with 2 consecutive 7-d experimental periods. After 5 d of adaptation, ileal digesta samples were collected at d 6 and 7. For statistical analysis, treatments were considered a 2 × 4 factorial arrangement with effects of species and experimental diets (Exp. 1 vs. Exp. 2). There were no interactions between species and diets for the digestibility of CP and AA except for Cys ( broiler chickens. In both broiler chickens and pigs, the AID of CP and indispensable AA in SBM-47 were greater ( broiler chickens except for Trp. In both broiler chickens and pigs, the SID of Lys in PNF was the least ( broiler chickens, the SID of CP, Ile, Leu, Thr, Trp, and Val in FFSB were less ( broiler chickens than in pigs, but the pattern of differences in the AA digestibility among ingredients was similar between broiler chickens and pigs.

  11. Índice térmico ambiental de produtividade para frangos de corte Environmental thermal index of productivity for broiler chickens

    Directory of Open Access Journals (Sweden)

    Carlos M. Medeiros

    2005-12-01

    Full Text Available Com o objetivo de desenvolver um índice térmico ambiental de produtividade para frangos de corte - IAPfc, que reúna, em um único valor, os efeitos da temperatura, umidade e velocidade do ar, conduziu-se um experimento com frangos Avian Farm, machos, criados de 1 a 21 dias de idade, em galpões convencionais com condições climáticas naturais e dos 22 aos 42 dias (abate em câmaras climáticas. Os tratamentos compreenderam combinações de 16, 20, 26, 32 e 36 ºC de temperatura (t, com 20, 34, 55, 76 e 90% de umidade relativa (u e 0; 0,6; 1,5; 2,4 e 3,0 m s-1 de velocidade do ar (v, sendo estas combinações feitas com base no delineamento composto central rotacional da metodologia de superfície de resposta. As dietas experimentais atenderam às exigências nutricionais, de acordo com cada fase de criação, e para todos os tratamentos. Os parâmetros avaliados foram: ganho de peso, consumo de ração diário, temperatura retal e freqüência respiratória, obtendo-se o modelo estatístico IAPfc = 45,6026 - 2,31072 t - 0,368331 u + 9,70922 v + 0,0549243 t² + 0,0012183 u² + 0,66329 v² + 0,0128968 tu - 0,300928 tv - 0,0595245 uv, baseado no desempenho animal e em parâmetros fisiológicos.In this study, the influence of temperature, relative humidity and air velocity in the development process of Avian Farm male chickens was analyzed in order to develop an environmental thermal index for productivity of broiler chickens - IAPfc. The chickens were first raised from 1 to 21 days of age in a conventional poultry-shed under natural conditions. Between 22nd and 42nd day (slaughter the chickens were kept in climatic chambers. The treatments consisted of combination of levels of variables: temperature (t 16, 20, 26, 32 and 36 ºC; relative humidity (u 20, 34, 55, 76 and 90%, and air velocity (v 0; 0.6; 1.5; 2.4 and 3.0 m s-1, according to the central rotatable composite design of the response surface methodology. The experimental diets attained

  12. Post-Modernising the Museum: The Ration Shed

    Directory of Open Access Journals (Sweden)

    Carly Smith

    2014-06-01

    Full Text Available The application of postmodern critical theory to the essentially modernist construct of the museum has significantly impacted the role of the contemporary museum within society. This article briefly describes the movement toward a ‘new museology’ and the subsequent emergence of the ‘post-museum’. It then presents a case study of the Ration Shed Museum in the historical precinct of Cherbourg, Queensland, as an example of this new ‘post-museum’. Through its application of postmodern critical theory, the Ration Shed Museum has détourned the construct of the modernist museum and applied its cultural logics in order to meet the specific needs of its local community. This museum presents a history previously overlooked by western grand narratives and offers insight into a contemporary local indigenous community on its own terms. It presents a public pedagogy where the agency of both the viewer and the museum itself is embraced, and promotes active engagement – a form of dialogue – between the viewer, the community and the museum’s curators.

  13. The effect of dietary alfalfa meal on the chicken meat quality

    Directory of Open Access Journals (Sweden)

    Jana Tkáčová

    2015-12-01

    Full Text Available The purpose of this study was to investigate the effect of feed mixtures with proportion of alflafa meal 4% on body weight of broiler chickens, fat content their meat and oxidative stability meat fat under storage conditions. Final hybrid Cobb 500 chickens were used in the experiment. The broiler chickens were fed with feed mixtures starter from the 1st to the 18th day, grower from the 19th to the 31st day and finisher from the 32nd to the 38th ad libitum. An alfalfa meal of 4% was added in the feed mixtures of experimental group. In our experiment, we used alfalfa meal, which was made from Medicago sativa L. harvested in the bud's phase. The carcasses of broilers were stored at -18° C for a period of nine months. The average weight of chickens at the end of our experiment, the control group was 1685.6 g. In experimental group with addition of 4% alfalfa meal in feed mixtures, the chickens weighed 1709.6 g. The difference in body weight between the groups was not statistically significant (p >0.05. The average fat content in chicken meat was lower in the group with a share of 4% alfalfa meal 2.33 g.100g-1 compared to the fat content in meat chickens control group 2.59 g.100g-1. Differences in fat content in meat between the groups were not statistically significant (p >0.05. In our experiment, the average peroxide value of fat in meat under storage conditions 9 months at -18°C was lower in the group with a share of 4% alfalfa meal 2.42 µmol O2.g-1 compared with an average value of peroxide number 5.79 µmol O2.g-1 in the control group. Medicago sativa L. is an interesting object for research. It is characterized by high content of protein and biologically active substances that are effective for the promotion of health, and also an improvement the nutritional value and technological properties of the poultry food, when is used in feed mixtures.

  14. Chicken Meat Submitted to Gamma Radiation and Packed with or without Oxygen

    Directory of Open Access Journals (Sweden)

    K Pelicia

    2015-06-01

    Full Text Available The objective of this study was to evaluate the effects on gamma radiation levels on the physical and microbiological characteristics of chicken breast meat. A completely randomized experimental design in a 4x2x3 factorial arrangement was adopted. Treatments consisted of four radiation concentrations (0, 2, 4, or 8kGy, two package sealing methods (with or without vacuum, and three storage times (01, 07, or 14 days, with ten replicates each, totaling 240 chicken breast fillets. Packaging and radiation had no influence (p>0.05 on chicken breast meat pH, water retention capacity, or presence of Salmonella spp. Breast fillets not submitted to radiation and vacuum packed presented higher water retention capacity (p<0.05 than those radiated at 4kGy and vacuum packed. Drip loss in fillets radiated at 8kGy and not vacuum packed was higher (p<0.05 than in non-radiated and non-vacuum packed fillets; however, both were not different from the other treatments. Coliform presence increased with storage time in non-radiated samples; however, when these were vacuum-packed, their development was slower. The results of the present experiment suggest that the use of a low radiation dose (2kGy, combined with vacuum packing, may minimize the harmful effects of storage on chicken breast fillets.

  15. Total Coliform, Acid Bacteria and Total Bacteria in Intestine of Broiler Chicken Given Turmeric

    Directory of Open Access Journals (Sweden)

    R. Halimatunnisroh

    2017-06-01

    Full Text Available The aim of this study was to investigate the effect of boiled turmeric water on total coliform bacteria, lactic acid bacteria (BAL and total bacteria in the small intestine of broiler chicken. 200 day-old-chick (DOC Lohman strain with the average initial body weight of 41,48 ± 0,99 g were used. Chickens kept for 35 days and the treatment of turmeric water in drinking water start given at 11 days old. The experimental design was Completely Randomized Design (RAL were used with 5 treatments and 5 replications, which each replication consist of 8 chicken. The treatments were T0 (100% water, T1 (25% boiled turmeric water : 75% water, T3 (75% boiled turmeric water : 25% water, and T4 (100% boiled turmeric water. Parameters that investigated were total coliform, BAL, and total bacteria in the small intestine. The results of boiled turmeric water in drinking water of broiler chicken small intestine that shows significant different (p0,05 on total coliform. Conclusion, that boiled turmeric water in drinking water not increasing/decreasing total coliform but decreasing total bacteria and increasing BAL.

  16. Microbial Shifts in the Intestinal Microbiota of Salmonella Infected Chickens in Response to Enrofloxacin

    Directory of Open Access Journals (Sweden)

    Jun Li

    2017-09-01

    Full Text Available Fluoroquinolones (FQs are important antibiotics used for treatment of Salmonella infection in poultry in many countries. However, oral administration of fluoroquinolones may affect the composition and abundance of a number of bacterial taxa in the chicken intestine. Using 16S rRNA gene sequencing, the microbial shifts in the gut of Salmonella infected chickens in response to enrofloxacin treatments at different dosages (0, 0.1, 4, and 100 mg/kg b.w. were quantitatively evaluated. The results showed that the shedding levels of Salmonella were significantly reduced in the high dosage group as demonstrated by both the culturing method and 16S rRNA sequencing method. The average values of diversity indices were higher in the control group than in the three medicated groups. Non-metric multidimensional scaling (NMDS analysis results showed that the microbial community of high dosage group was clearly separated from the other three groups. In total, 25 genera were significantly enriched (including 6 abundant genera: Lactococcus, Bacillus, Burkholderia, Pseudomonas, Rhizobium, and Acinetobacter and 23 genera were significantly reduced in the medicated groups than in the control group for the treatment period, but these bacterial taxa recovered to normal levels after therapy withdrawal. Additionally, 5 genera were significantly reduced in both treatment and withdrawal periods (e.g., Blautia and Anaerotruncus and 23 genera (e.g., Enterobacter and Clostridium were significantly decreased only in the withdrawal period, indicating that these genera might be the potential targets for the fluoroquinolones antimicrobial effects. Specially, Enterococcus was significantly reduced under high dosage of enrofloxacin treatment, while significantly enriched in the withdrawal period, which was presumably due to the resistance selection. Predicted microbial functions associated with genetic information processing were significantly decreased in the high dosage group

  17. Lymphopoiesis in the chicken pineal gland

    Energy Technology Data Exchange (ETDEWEB)

    Cogburn, L.A.; Glick, B.

    1981-10-01

    Pineal lymphoid development was studied in two breeds of chickens from hatching until sexual maturity. No lymphocytes were found in the pineal prior to 9 days of age (da). Lymphocytes migrate through the endothelium of venules into the pineal stroma. Lymphoid tissue reached its maximal accumulation in 32-da pineal glands of both breeds. At this age, the New Hampshire (NH) breed had a larger proportion of lymphoid volume to total pineal volume (32%) than did pineal glands from White Leghorn (WL) chickens (18%).

  18. The influence of the selection of macronutrients coupled with dietary energy density on the performance of broiler chickens.

    Science.gov (United States)

    Liu, Sonia Y; Chrystal, Peter V; Cowieson, Aaron J; Truong, Ha H; Moss, Amy F; Selle, Peter H

    2017-01-01

    A total of 360 male Ross 308 broiler chickens were used in a feeding study to assess the influence of macronutrients and energy density on feed intakes from 10 to 31 days post-hatch. The study comprised ten dietary treatments from five dietary combinations and two feeding approaches: sequential and choice feeding. The study included eight experimental diets and each dietary combination was made from three experimental diets. Choice fed birds selected between three diets in separate feed trays at the same time; whereas the three diets were offered to sequentially fed birds on an alternate basis during the experimental period. There were no differences between starch and protein intakes between choice and sequentially fed birds (P > 0.05) when broiler chickens selected between diets with different starch, protein and lipid concentrations. When broiler chickens selected between diets with different starch and protein but similar lipid concentrations, both sequentially and choice fed birds selected similar ratios of starch and protein intake (P > 0.05). However, when broiler chickens selected from diets with different protein and lipid but similar starch concentrations, choice fed birds had higher lipid intake (129 versus 118 g/bird, P = 0.027) and selected diets with lower protein concentrations (258 versus 281 g/kg, P = 0.042) than birds offered sequential diet options. Choice fed birds had greater intakes of the high energy diet (1471 g/bird, P broiler chickens were offered diets with different energy densities but high crude protein (300 g/kg) or digestible lysine (17.5 g/kg) concentrations. Choice fed birds had lower FCR (1.217 versus 1.327 g/g, P broiler chickens selected equal amounts of the three diets in the combination. Regardless of feeding regimen, the intake paths of starch and protein are very close to the null path; however, lipid and protein intake paths in choice fed birds are father from the null path than sequentially fed birds.

  19. Anticoccidial efficacy of toltrazuril and halofuginone against Eimeria tenella infection in broiler chickens in Egypt.

    Science.gov (United States)

    Ramadan, A; Abo el-Sooud, K; el-Bahy, M M

    1997-01-01

    The anticoccidial activities of toltrazuril and halofuginone against Eimeria tenella were tested in broiler chickens. Comparisons were made between ummedicated infected and uninfected control birds in addition to infected groups given either toltrazuril at 37.5, 75 and 150 ppm in the drinking water, or halofuginone at 1.5, 3 and 6 ppm in the feed. Both drugs were highly efficacious against E tenella. Treatment improved the bodyweight gain and survival percentage in comparison with the unmedicated, infected group. Intestinal lesions, faecal and oocyst scores and oocyst shedding in dropping were significantly reduced by both drugs. Toltrazuril gave better protection than halofuginone; 75 and 150 ppm toltrazuril in drinking water gave good protection when administered four and five days after inoculation.

  20. Display of Eimeria tenella EtMic2 protein on the surface of Saccharomyces cerevisiae as a potential oral vaccine against chicken coccidiosis.

    Science.gov (United States)

    Sun, Hui; Wang, Longjiang; Wang, Tiantian; Zhang, Jie; Liu, Qing; Chen, Peipei; Chen, Zhengtao; Wang, Fangkun; Li, Hongmei; Xiao, Yihong; Zhao, Xiaomin

    2014-04-01

    S. cerevisiae is generally regarded as safe and benign organism and its surface display system may be used as a unique eukaryotic expression system that is suitable for expressing eukaryotic antigen. In addition to the convenience of vaccine delivery, the yeast cell wall has been shown to enhance the innate immunity when immunized with the yeast live oral vaccine. In the present study, we expressed the chicken coccidian E. tenella EtMic2, a microneme protein, on the surface of the S. cerevisiae and evaluated it as a potential oral vaccine for chicken against E. tenella challenge. The protective efficacy against a homologous challenge was evaluated by body weight gains, lesion scores and fecal oocyst shedding. The results showed that the live oral vaccine can improve weight gains, reduced cecal pathology and lower oocyst fecal shedding compared with non immunized controls. In addition, the yeast oral vaccine could stimulate humoral as well as cell mediate immune responses. These results suggested that EtMic2 displayed on the cell surface of S. cerevisiae could be used as potential live vaccine against chicken coccidiosis. Copyright © 2014 Elsevier Ltd. All rights reserved.

  1. THE INFLUENCE OF BEE PRODUCTS IN COMBINATION WITH PROBIOTIC IN CHICKEN DIET ON OXIDATIVE STABILITY OF CHICKEN MEAT

    Directory of Open Access Journals (Sweden)

    Marek Bobko

    2016-06-01

    Full Text Available In the experiment, the effect of the addition bee pollen extract in combination of with probiotic and propolis extract in combination with probiotic in diet of chicken broilers Ross 308 on oxidative stability of breast and thigh muscles during 7 days storage by chilling was investigated. In the experiment were included 120 pieces of one day-old chicks, which were divided into 3 groups (control, E1 and E2. Feed mixtures and drinking water were given to chickens by ad libitum system until the age of 42 days. Bee pollen extract in amount of 400 mg.kg-1 added to feed mixtures plus 3.3 g probiotic preparation (Lactobacillus fermentum added to drinking water (E1, propolis extract in amount of 400 mg.kg-1 added to feed mixtures plus 3.3 g probiotic preparation (Lactobacillus fermentum added to drinking water (E2. During whole period of chilled storage (7 days were higher values of MDA determined in control group (C compared with experimental groups (E1 and E2. The higher average MDA values determined in breast muscle was in samples of control group (0.128 mg.kg-1 compared with experimental groups E1 (P0.05 and E2 (P≤0.05 (0.127 and 0.119 mg.kg-1, respectively after 7-day of chilled storage. The higher average MDA values (P0.05 were also determined in thigh muscles in control group (0.141 mg.kg-1 compared with experimental groups E1 (0.139 mg.kg-1 and E2 (0.128 mg.kg-1 after 7-day of chilled storage. Higher amount of MDA in thigh muscle compared to breast muscle is due to by higher amount of fat occurred in thigh muscle.

  2. Ascaridia galli infection influences the development of both humoral and cell-mediated immunity after Newcastle Disease vaccination in chickens.

    Science.gov (United States)

    Pleidrup, Janne; Dalgaard, Tina S; Norup, Liselotte R; Permin, Anders; Schou, Torben W; Skovgaard, Kerstin; Vadekær, Dorte F; Jungersen, Gregers; Sørensen, Poul; Juul-Madsen, Helle R

    2014-01-09

    Potent vaccine efficiency is crucial for disease control in both human and livestock vaccination programmes. Free range chickens and chickens with access to outdoor areas have a high risk of infection with parasites including Ascaridia galli, a gastrointestinal nematode with a potential influence on the immunological response to vaccination against other infectious diseases. The purpose of this study was to investigate whether A. galli infection influences vaccine-induced immunity to Newcastle Disease (ND) in chickens from an MHC-characterized inbred line. Chickens were experimentally infected with A. galli at 4 weeks of age or left as non-parasitized controls. At 10 and 13 weeks of age half of the chickens were ND-vaccinated and at 16 weeks of age, all chickens were challenged with a lentogenic strain of Newcastle disease virus (NDV). A. galli infection influenced both humoral and cell-mediated immune responses after ND vaccination. Thus, significantly lower NDV serum titres were found in the A. galli-infected group as compared to the non-parasitized group early after vaccination. In addition, the A. galli-infected chickens showed significantly lower frequencies of NDV-specific T cells in peripheral blood three weeks after the first ND vaccination as compared to non-parasitized chickens. Finally, A. galli significantly increased local mRNA expression of IL-4 and IL-13 and significantly decreased TGF-ß4 expression in the jejunum two weeks after infection with A. galli. At the time of vaccination (six and nine weeks after A. galli infection) the local expression in the jejunum of both IFN-? and IL-10 was significantly decreased in A. galli-infected chickens. Upon challenge with the NDV LaSota strain, viral genomes persisted in the oral cavity for a slightly longer period of time in A. galli-infected vaccinees as compared to non-parasitized vaccinees. However, more work is needed in order to determine if vaccine-induced protective immunity is impaired in A. galli

  3. Effects of Feed Restriction on Production Performance and Carcass Characteristics of Koekoek Chickens in Ethiopia

    OpenAIRE

    Salih R; Tesfaye E; Tamir B; Singh H.

    2016-01-01

    This study was conducted to examine the effects of feed restriction on production performance as well as traits relating to egg and carcass yield in Potchefstroom Koekoek dual purpose chicken bred under Ethiopian conditions. A total of 240 one-day-old dual purpose Koekoek chicks were randomly distributed into 12 experimental pens, representing 4 feeding treatments to evaluate the performance of chicks on body weight and age at onset of laying eggs (AOLE), egg quality, and carcass parameters. ...

  4. Sensory evaluation of coob 500 chicken meat after application of different additives in their nutrition

    Directory of Open Access Journals (Sweden)

    Martin Mellen

    2014-02-01

    Full Text Available The objective of the experiment was to verify the effect of different feed additives in nutrition of Cobb 500 broiler chickens  on the sensory quality of breast and thigh muscle modified by baking at temperature 200 ºC for 60 minutes. The experiment included 250 one-day-old Cobb 500 hybrid chickens, which were divided into 5 groups (n=50: control (I and experimental groups (E1 with Agolin Poultry at doses of 100 mg.kg-1, E2 with Agolin Tannin Plus at doses of 500 mg.kg-1, E3 with Biostrong 510+FortiBac at doses of 1000 mg.kg-1 and E4 with Agolin Acid at doses of 1000 mg.kg-1. The chickens were fed during 42 days of age by ad libitum system with feed mixtures: BR1 starter feed mixture (until the of 10th day of age, BR2 growth feed mixture (from 11th to 20th day of age, BR3 growth feed mixture (from 21st to 35th days of age and BR4 final feed mixture (from 36th to 42nd days of age. Feed mixtures were produced with coccidiostats in powder form. Panellists evaluate aroma, juiciness, taste and tenderness on 5 point hedonic scale where 1 (the worst and 5 (the best were the extremes of each characteristic. Significant differences were found between control and experimental group E3 in juiciness and tenderness of breast muscles and between control and experimental group E2 in smell of thigh muscles. Sensory evaluation of breast and thigh muscles in Cobb 500 chickens after application of different feed additives indicated that these additives have not worsened the quality of meat. The highest sensory score was obtained in experimental group E4 (with addition of Agolin Acid at the dose of 1000 mg.kg-1. Normal 0 21 false false false CS JA X-NONE

  5. Organization of collagen types I and V in the embryonic chicken cornea: monoclonal antibody studies.

    OpenAIRE

    Fitch, J M; Gross, J.; Mayne, R.; Johnson-Wint, B; Linsenmayer, T F

    1984-01-01

    To determine whether type V collagen is antigenically masked in situ by its fibrillar organization, two different methods were used to perturb selectively the structure of collagen fibrils in sections of embryonic chicken corneas. The experimentally modified tissues were probed by immunohistochemical procedures with monoclonal antibodies against types V and I. A lathyritic agent was used to block crosslinking of newly synthesized collagen. This results in reversible temperature-sensitive alte...

  6. The Role of Collaborative Learning on Training and Development Practices within the Australian Men's Shed Movement: A Study of Five Men's Sheds

    Science.gov (United States)

    Cavanagh, Jillian; Southcombe, Amie; Bartram, Tim

    2014-01-01

    This study examines the role and impact of collaborative learning on training and development practices in Australian Men's Sheds. We use a case study approach, underpinned by Peters and Armstrong's theoretical framework of collaborative learning in adult education, to investigate five Men's Sheds. Semi-structured interviews were carried out with…

  7. Investigation some characteristics of chicken feather’s rachis

    Science.gov (United States)

    Paşayev, N.; Kocatepe, S.; Maraş, N.; Soylak, M.; Erol, M.

    2017-10-01

    In recent years, obtaining the natural protein fibers from chicken feathers, which are obtained as a by-product in the production of chicken meat and which cause environmental pollution and important part is waste, has been drawn to the perspective of scientists. So, the investigations about the chicken feather fibers reveal important properties of these fibers. Chicken feather fibers are obtained by mechanical cutting of the barbs which have fibrous structure, the structure branched from rachis and constitute the body of the feather. The rachis part of chicken feather constitutes approximately half of the weight of the feathers. So, it is necessary to examine the properties of the chicken feathers in order to gain their industrialization. This study is concerned with the mechanical and physical properties of the material that is taken as a by-product in the production of fibers from chicken feathers and constitutes the rachis part of the feathers.

  8. Paper points revisited: risk of cellulose fibre shedding during canal length confirmation.

    Science.gov (United States)

    Brown, D W P

    2017-06-01

    To compare the degree of fibre shedding by six brands of endodontic paper point when used for the paper point technique (PPT) of working length confirmation. An in vitro model simulating the clinical use of paper points in PPT was used to assess the degree of fibre shedding of six brands of size 20, .02 taper paper point. Whilst observing the artificial terminal foramen with polarized light microscopy, the number of fibres shed directly (point inserted 1 mm beyond the terminal foramen) and indirectly (point inserted to length then a gutta-percha point inserted) was assessed. The degree of direct fibre shedding as a function of brand was analysed with Fisher's exact test and multiple pairwise comparisons. Indirect fibre shedding was analysed with Kruskal-Wallis and Wilcoxon rank-sum tests. All brands shed fibres both directly and indirectly, with a significant influence of brand on the proportion of fibres shed directly (P Post hoc analysis demonstrated a similar hierarchy of point integrity for both tests with Classic (UnoDent, Witham, UK) shedding significantly more than other brands and SS White (Gloucester, UK) and Antaeos® (VDW, Munich, Germany) shedding the least. All brands of paper point may shed cellulose fibres both directly and indirectly with a significant influence of brand on the degree of fibre shedding. Further work should be undertaken to develop biocompatible absorbent dental points. © 2016 International Endodontic Journal. Published by John Wiley & Sons Ltd.

  9. Enhancement of Th1-biased protective immunity against avian influenza H9N2 virus via oral co-administration of attenuated Salmonella enterica serovar Typhimurium expressing chicken interferon-α and interleukin-18 along with an inactivated vaccine

    Directory of Open Access Journals (Sweden)

    Rahman Md

    2012-07-01

    Full Text Available Abstract Background Control of currently circulating re-assorted low-pathogenicity avian influenza (LPAI H9N2 is a major concern for both animal and human health. Thus, an improved LPAI H9N2 vaccination strategy is needed to induce complete immunity in chickens against LPAI H9N2 virus strains. Cytokines play a crucial role in mounting both the type and extent of an immune response generated following infection with a pathogen or after vaccination. To improve the efficacy of inactivated LPAI H9N2 vaccine, attenuated Salmonella enterica serovar Typhimurium was used for oral co-administration of chicken interferon-α (chIFN-α and chicken interleukin-18 (chIL-18 as natural immunomodulators. Results Oral co-administration of S. enterica serovar Typhimurium expressing chIFN-α and chIL-18, prior to vaccination with inactivated AI H9N2 vaccine, modulated the immune response of chickens against the vaccine antigen through enhanced humoral and Th1-biased cell-mediated immunity, compared to chickens that received single administration of S. enterica serovar Typhimurium expressing either chIFN-α or chIL-18. To further test the protective efficacy of this improved vaccination regimen, immunized chickens were intra-tracheally challenged with a high dose of LPAI H9N2 virus. Combined administration of S. enterica serovar Typhimurium expressing chIFN-α and chIL-18 showed markedly enhanced protection compared to single administration of the construct, as determined by mortality, clinical severity, and feed and water intake. This enhancement of protective immunity was further confirmed by reduced rectal shedding and replication of AIV H9N2 in different tissues of challenged chickens. Conclusions Our results indicate the value of combined administration of chIFN-α and chIL-18 using a Salmonella vaccine strain to generate an effective immunization strategy in chickens against LPAI H9N2.

  10. Comparative evaluation of probiotic and salinomycin effects on performance and coccidiosis control in broiler chickens.

    Science.gov (United States)

    Abdelrahman, Wael; Mohnl, Michaela; Teichmann, Klaus; Doupovec, Barbara; Schatzmayr, Gerd; Lumpkins, Brett; Mathis, Greg

    2014-12-01

    The annual financial loss to the poultry industry as a result of coccidiosis has been estimated at about US $3 billion. The objective of this study was to evaluate and compare the effects of probiotics and salinomycin as feed additives on performance and coccidiosis control in male broilers raised to 42 d of age. The study consisted of 360 Cobb male broiler chickens randomly allocated to 4 groups each with 3 replicates. Group 1: untreated, unchallenged negative control group (NC); group 2: untreated, challenged positive control group (PC); group 3: negative control supplemented with salinomycin 66 mg/kg, challenged group (Sal); and group 4: negative control supplemented with probiotics, challenged (Prob mix). On d 15, all birds (except group 1) were challenged with approximately 75,000, 25,000, and 75,000 of Eimeria acervulina, Eimeria maxima, and Eimeria tenella oocytes, respectively, that were mixed into the feed. Feed conversion ratio and mortality were recorded throughout the experiment. On d 21 and 42, intestinal lesions and litter conditions were scored. On d 7, 14, 21, 28, 35, and 42, oocyst counts were determined from 10 freshly collected fecal samples per pen. The results showed that mortality, litter, and lesion scores at d 21 and 42, and oocyst shedding at d 21 did not differ significantly between the Prob mix and the Sal groups. However on d 28, oocyst shedding was significantly lower in the Sal group than in the PC group but insignificantly lower than the Prob mix group. Body weights of the Prob mix group at d 42 were significantly lower than the Sal group; however, the feed conversion ratio values were similar between the 2 groups. The results of this study showed that probiotics supplementation could be considered as a potential strategy to control coccidiosis in broiler chickens. ©2014 Poultry Science Association Inc.

  11. The response of ducks to V4 Newcastle disease virus and its transmission to contact ducks and domestic chickens

    Directory of Open Access Journals (Sweden)

    Majid Bouzari

    2014-06-01

    Full Text Available Experimental infection of Muscovy ducks with V4 strain of Newcastle disease virus was undertaken to determine the response of the ducks to the virus and the possibility of virus transmission to ducks and chickens in village like conditions. Twelve ducks were randomly and equally divided into three groups of control, inoculated and in-contact. Additionally, the chickens were placed into two groups of four animals each, namely in-contact and control. The inoculated and in-contact ducks and in-contact chickens were kept together. The eye drop route was used for inoculation and hemagglutination inhibition (HI antibodies were measured for assessment of antibody response and cloacal and pharyngeal swabs were used for detection of the virus. The primary antibody response of inoculated ducks was very high and rapid (geometric mean titers [Log base 2] of up to 5.75 ± 0.50. The in-contact ducks showed antibody response with the same pattern but lower titers than the inoculated ducks (geometric mean titers [Log base 2] of up to 3.25 ± 1.70. The in-contact chickens showed a slight increase of HI antibody (geometric mean titers [Log base 2] of up to 2.25 ± 1.25 while the control chickens did not show any increase. The antibody response indicated the transmission of the virus to contact ducks and chickens. A single isolation of virus confirmed the ability of ducks to excrete the virus. It was concluded that the V4 strain of Newcastle disease virus was highly antigenic for ducks, and ducks can transmit it to other ducks and also in-contact chickens.

  12. Effect of heat killed Mycobacterium phlei on body weight gain and management of caecal coccidiosis in broiler chickens.

    Science.gov (United States)

    Bera, A K; Bhattacharya, D; Pan, D; Manna, B; Bandyopadhyay, S; Das, S K

    2010-10-01

    The objective of this study was to evaluate the immunotherapeutic potential of heat killed Mycobacterium phlei in broiler chicken against experimentally produced Eimeria tenella infection. The selected dose of E. tenella oocyst (5x10(3) sporulated oocysts per bird) was capable of producing a mild form of caecal coccidiosis as observed by significant difference in body weight gain, clinical findings and caecal lesion score. Heat killed M. phlei was fed orally at 10 mg per bird with sterile PBS vehicle at alternate day for four doses. Our study reveals that per day body weight gain was significantly (pcoccidiosis in broiler chicken. 2010 Elsevier Ltd. All rights reserved.

  13. Chicken IL-17F: Identification and comparative expression analysis in Eimeria-Infected chickens

    Science.gov (United States)

    Interleukin-17F (IL-17F), belonging to the IL-17 family, is a proinflammatory cytokine and plays an important role in gut homeostasis. A full-length chicken IL-17F (chIL-17F) cDNA with a 510-bp coding region was first identified from ConA-activated splenic lymphocytes of chickens. The chIL-17F share...

  14. Growth hormone (GH)-releasing activity of chicken GH-releasing hormone (GHRH) in chickens.

    Science.gov (United States)

    Harvey, S; Gineste, C; Gaylinn, B D

    2014-08-01

    Two peptides with sequence similarities to growth hormone releasing hormone (GHRH) have been identified by analysis of the chicken genome. One of these peptides, chicken (c) GHRH-LP (like peptide) was previously found to poorly bind to chicken pituitary membranes or to cloned and expressed chicken GHRH receptors and had little, if any, growth hormone (GH)-releasing activity in vivo or in vitro. In contrast, a second more recently discovered peptide, cGHRH, does bind to cloned and expressed cGHRH receptors and increases cAMP activity in transfected cells. The possibility that this peptide may have in vivo GH-releasing activity was therefore assessed. The intravenous (i.v.) administration of cGHRH to immature chickens, at doses of 3-100 μg/kg, significantly increased circulating GH concentrations within 10 min of injection and the plasma GH levels remained elevated for at least 30 min after the injection of maximally effective doses. The plasma GH responses to cGHRH were comparable with those induced by human (h) or porcine (p) GHRH preparations and to that induced by thyrotropin releasing hormone (TRH). In marked contrast, the i.v. injection of cGHRH-LP had no significant effect on circulating GH concentrations in immature chicks. GH release was also increased from slaughterhouse chicken pituitary glands perifused for 5 min with cGHRH at doses of 0.1 μg/ml or 1.0 μg/ml, comparable with GH responses to hGHRH1-44. In contrast, the perifusion of chicken pituitary glands with cGHRH-LP had no significant effect on GH release. In summary, these results demonstrate that cGHRH has GH-releasing activity in chickens and support the possibility that it is the endogenous ligand of the cGHRH receptor. Copyright © 2014 Elsevier Inc. All rights reserved.

  15. Influence of immunomodulators of natural origin on cellular immunity indices in blood of broiler chicken under stress

    Directory of Open Access Journals (Sweden)

    S. Grabovskyi

    2015-03-01

    Full Text Available The paper deals with researching of T- and B-lymphocytes relative quantity and functional activity in broiler chicken blood after using of animal origin immunomodulators in conditions of pre-slaughter stress. The authors determined the relative amount of T- and B-lymphocytes and their individual populations in the reaction of spontaneous rоsetting with the sheep erythrocytes in blood. Besides, the differentiated count of rоsetting lymphocytes with the various degree of functional activity was conducted. The spleen extract (70% alcohol solution in volume of 1.4 ml per chicken was added to the diet of broiler chicken of experimental groups by aerosol method. This extract was obtained with/ without ultrasound application. 70% alcohol solution in the same volume and using the same method was added to the diet of broiler chicken of the control group five days before slaughter. The authors have not established probable increase of T-lymphocytes general quantity in broiler chicken blood in both experimental groups. It is shown that pre-slaughter stress in broiler chicken caused by weaning has immuno-suppressive effect on T- and B-lymphocytes in blood, which is accompanied by their quantity and functional activity decrease. T- and B-lymphocytes amount and functional activity of T- and B-cell immunity was stimulated after adding immunomodulators of natural origin to broiler chicken diet. Spleen extract polyamines as immunomodulators and antistressors most effectively influenced on some of cell immunity indices before slaughter – it is necessary to note the increase in T-helper lymphocytes in the broiler chickens blood caused by lymphocytes with medium (6–10 – by 18% (Р < 0.05 and high density receptors (М – by 35% (Р < 0.05 compared to the control. It is shown that decrease of T-lymphocytes quantity in broiler chicken blood is caused by lymphocytes with law (3–5 – by 22% (Р < 0.01 and high (M – by 11% (Р < 0.05 density receptors with

  16. Comparative analysis of acetic and citric acid on internal milieu of broiler chickens

    Directory of Open Access Journals (Sweden)

    Marcela Capcarova

    2014-02-01

    Full Text Available Normal 0 21 false false false CS JA X-NONE The aim of the present study was to analyse the effect of two organic acids (acetic and citric acid inclusion on serum parameters and the level of antioxidant status of broiler chickens. Some organic acidifiers reduce the growth of many intestinal bacteria, reduce intestinal colonisation and reduce infectious processes, decrease inflammatory processes at the intestinal mucosa, increase villus height and function of secretion, digestion and absorption of nutrients. Broiler chickens hybrid Ross 308 (n=180 were divided into 3 groups: one control (C and two experimental groups (E1, E2. Experimental animals received acetic and citric acid per os in water in single dose 0.25% for 42 days. After 42 days of feeding blood samples were collected (n=10 in each group. Significant decrease of serum triglycerides in citric acid group when compared with the control group was recorded. Acetic acid administration resulted in increased sodium level. Significant increase of albumin content in both experimental groups and increase of bilirubin content in citric group was recorded. Acids administration had no significant effect on other serum and antioxidant parameters. Acetic and citric acid had no harmful influenced on internal milieu of broiler chickens. The research on the field of organic acid will be worthy of further investigation.

  17. Biomechanical simulations of the scoliotic deformation process in the pinealectomized chicken: a preliminary study

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    Villemure Isabelle

    2007-11-01

    Full Text Available Abstract Background The basic mechanisms whereby mechanical factors modulate the metabolism of the growing spine remain poorly understood, especially the role of growth adaptation in spinal disorders like in adolescent idiopathic scoliosis (AIS. This paper presents a finite element model (FEM that was developed to simulate early stages of scoliotic deformities progression using a pinealectomized chicken as animal model. Methods The FEM includes basic growth and growth modulation created by the muscle force imbalance. The experimental data were used to adapt a FEM previously developed to simulate the scoliosis deformation process in human. The simulations of the spine deformation process are compared with the results of an experimental study including a group of pinealectomized chickens. Results The comparison of the simulation results of the spine deformation process (Cobb angle of 37° is in agreement with experimental scoliotic deformities of two representative cases (Cobb angle of 41° and 30°. For the vertebral wedging, a good agreement is also observed between the calculated (28° and the observed (25° – 30° values. Conclusion The proposed biomechanical model presents a novel approach to realistically simulate the scoliotic deformation process in pinealectomized chickens and investigate different parameters influencing the progression of scoliosis.

  18. Effect of feeding Thymolina® powder on the carcass characteristics and morphology of small intestine in ross 308 broiler chickens

    Directory of Open Access Journals (Sweden)

    Seyyedmousa Hosseini

    2017-02-01

    Full Text Available In the present experiment, 320 one day old Ross 308 broiler chickens were used completely randomized design with 4 treatments, 4 replicates, and each replicate contained 20 broiler chickens. Experimental treatments include control, 0.5, 1, and 2% of Thymolina powder in chickens’ diet. Thymolina® is an anti-bacterial powder drug which is made by composing 4 medicinal plants. A significant difference observed between treatments in each parameter of the Intestinal morphology (villus height, villus width, crypt depth and epithelial thickness. Goblet cells number was not affected. Our findings indicated that using Thymolina® in the diet of broiler chickens causes improvements in carcass characteristics. Therefore, it may improve the carcass characteristics and morphology of small intestine in broiler chickens.

  19. Analysis of Phosphorus Flows through Minnesota's Twin Cities Urban Food-Shed: Three Scenarios for Improving Nutrient Efficiency

    Science.gov (United States)

    Peterson, H. M.; Baker, L. A.

    2012-12-01

    Phosphorus (P) is a non-renewable resource, essential for agriculture and human food production. Although it is being depleted globally, urban P use is inefficient and contributes to water resources degradation, particularly accelerated eutrophication of receiving waters. A paradox in the P cycle is that although P enters the system through fertilizer application to agricultural land or livestock manure production in rural areas, the resulting food produced is consumed within urban households. Dietary food consumption is the largest P input to, and output from, Twin Cities Metropolitan Area (TCMA), Minnesota, households. This 7-county area has a population of 2.9 million (2010), which is over half of the State's population. Human food accounts for 41% of the P input to and 46% of the P output from the TCMA; only about 1% of the P in food waste is recycled. Expanding on previous work by the Twin Cities Household Ecosystem Project (TCHEP), this P flow analysis aims to quantify nutrient inputs required throughout the agricultural system to produce the amount of food consumed by TCMA households, while examining P use efficiency by summarizing the extent of leakage (waste), storage, and reuse throughout these systems. Food corresponding to a minimum of 80% of the total dietary P-input for TCMA households can be produced entirely within Minnesota's agricultural system, hence our "food-shed" is more-or-less directly connected to urban consumers. The top food products which contribute the largest input of dietary P are milk, cheese, wheat flour, beef, chicken, caloric sweeteners and pork. Mapping out an agricultural footprint which can support this urban ecosystem enables P use to be conceptualized through a circular economy model, in this case with Minnesota as the food-shed boundary. Using state-level data, augmented with intensive interview data collected from local livestock and food production experts, a detailed P balance was developed for each major animal and

  20. Comparison of non-volatile umami components in chicken soup and chicken enzymatic hydrolysate.

    Science.gov (United States)

    Kong, Yan; Yang, Xiao; Ding, Qi; Zhang, Yu-Yu; Sun, Bao-Guo; Chen, Hai-Tao; Sun, Ying

    2017-12-01

    Umami taste is an important part to the taste of chicken. To isolate and identify non-volatile umami compounds, fractions from chicken soup and hydrolysate were prepared and analyzed. Amino acids were analyzed by amino acid analyzer. Organic acids and nucleotides were determined by ultra-performance liquid chromatography. Separation procedures utilizing ultrafiltration, Sephadex G-15 and reversed-phase high-performance liquid chromatography were used to isolate umami taste peptides. Combined with sensory evaluation and LC-Q-TOF-MS, the amino acid sequences of 12 oligopeptides were determined. The amount of taste compounds was higher in chicken enzymatic hydrolysate than that of chicken soup. Eight oligopeptides from chicken enzymatic hydrolysate were identified, including Ala-Asp, Ala-Met, His-Ser, Val-Glu, Ala-Glu, Asp-Ala-Gly, Glu-Asp and Ala-Glu-Ala. Four oligopeptides from chicken soup were identified, including Val-Thr, Ala-His, Ala-Phe and Thr-Glu. Copyright © 2017 Elsevier Ltd. All rights reserved.

  1. Phenotypic and Genotypic Detection of Campylobacter jejuni at Local Chicken and Chicken Meat

    Directory of Open Access Journals (Sweden)

    A Rosyidi

    2010-05-01

    Full Text Available The Objective of this study was to identify the existence of Campylobacter jejuni based on phenotypic and genotypic characteristic in local chicken and chicken meats. Samples of local chicken intestine and meat were tested for the bacterial existence. Phenotypic examination was carried out by means of cultivation followed by gram staining and biochemical tests. Genotypic examination was conducted by polymerase chain reaction (PCR using genus specific16S rRNA gene at 816 bp and membrane-associated protein A (mapA gene at 589 bp as Campylobacter jejuni species-specific gene. The result of phenotypic detection revealed the existence of Campylobacter spp as gram negative, curved rod shape, oxidase positive, urease negative and motile. Genotypic examination also indicated the existence of bacteria using both primers. However, no Campylobacter jejuni detected from meat of the chickens. The results suggest that the method of PCR using a primer detecting species-specific gene of Campylobacter jejuni gives a rapid and accurate detection of the bacteria as compared to that using phenotypic and biochemical test. Identification of Campylobacter spp from chicken meats should be improved with enrichment method and sample collection. (Animal Production 12(2: 128-134 (2010Key Words: Campylobacter jejuni, mapA gene, local chicken

  2. Particle shedding and migration from silicone genitourinary prosthetic devices

    Energy Technology Data Exchange (ETDEWEB)

    Barrett, D.M.; O' Sullivan, D.C.; Malizia, A.A.; Reiman, H.M.; Abell-Aleff, P.C. (Department of Urology, Mayo Clinic, Rochester, MN (USA))

    1991-08-01

    Of 26 patients undergoing revision of genitourinary prostheses the surrounding reactive fibrous capsule was biopsied in 25 and the draining lymph nodes also were biopsied in 4. The prostheses included 16 inflatable and 14 flexible penile devices, and 10 artificial urinary sphincters. Tissue was examined by light and transmission electron microscopy. X-ray microanalysis was done on intracellular and extracellular foreign material from each specimen. Silicone was found in 18 of the 25 periprosthetic specimens and in all 4 lymph nodes. Foreign body granulomas were identified in 14 of these 29 specimens. Examination of new and explanted versions of each prosthesis by scanning electron microscopy revealed free particles of silicone or silicates on the surface of most devices. Pitting and microfissuring were seen on a few of the new devices and on nearly all of the used ones. Thus, genitourinary prostheses shed silicone particles that can be found in the fibrous capsule and draining lymph nodes.

  3. Newcastle Disease Virus infection study on duck and chicken in Subang district

    Directory of Open Access Journals (Sweden)

    Aprizal Panus

    2015-06-01

    Full Text Available The objectives of this research were to study Newcastle Disease Virus (NDV infection in Subang area and to examine the diversity of the circulating NDV. Swabs of cloacal and oropharynx, and serum were sampled from total of 393 chickens and 149 ducks in backyard farms and live bird markets located in 10 subdistricts. Screening of NDV in pool of 5-7 samples by real-time Reverse-Transcription Polymerase Chain Reaction (rRT-PCR matrix (M showed 19/67 (28.3% cloacal and 8/67 (11.9% pharyngeal pools of chicken samples; 18/67 (26.9% of the pools excreted virus via cloaca and oropharynx, while the duck pools of 8/30 (26.7% shed virus from cloaca. Virus isolation attempted on individual sample from positive pools yielded 18 isolates which the majority of the isolates showed homogeneous antigenic character, only some of these showed variations up to 2 Log2 with Lasota and 4 Log2 with Komarov antisera. Majority of isolates had a higher affinity to Komarov indicating their propencity to virulent strains. Pathogenicity examination using elution test showed 3 isolates virus were grouped to mesogenic strains and 15 isolates to velogenic strain, in agreement with rRT-PCR fusion results. HI test on 408 sera showed that NDV antibody was detected in 48 (12% birds with titres ranging from 1 to 8 Log2; only about 13% of vaccinated chickens demonstrated protective antibody titre (≥3 Log2. Newcastle disease is still endemic in Subang with relatively low antigenic variation among circulating strains.

  4. First week nutrition for broiler chickens

    NARCIS (Netherlands)

    Lamot, David

    2017-01-01

    During the first week of life, broiler chickens undergo various developmental changes that are already initiated during incubation. Ongoing development of organs such as the gastro- intestinal tract and the immune system may affect the nutritional requirements during this age period. Despite the

  5. Alternative anticoccidial treatment of broiler chickens

    NARCIS (Netherlands)

    Elmusharaf, M.A.

    2007-01-01

    This thesis describes the effects of mannanoligosaccharides (MOS) and electromagnetic fields (EMF) in broiler chickens infected with Eimeria parasites. The question addressed was whether ingestion of MOS or exposure to EMF would counteract the coccidiosis-induced depression of growth performance and

  6. Genetic characterization of native southern African chicken ...

    African Journals Online (AJOL)

    Unknown

    for the genetic conservation of poultry resources (Scherf, 1995). Similar projects have since been undertaken for all the major livestock species (Mason & Crawford, 1993). To date, native South African chicken lines have received very little scientific attention, and research projects have been directed primarily towards ...

  7. Generation of antiviral transgenic chicken using spermatogonial ...

    African Journals Online (AJOL)

    This study was conducted in order to generate anti-viral transgenic chickens through transfected spermatogonial stem cell with fusion gene EGFP-MMx. After injecting fusion gene EGFP-MMx into testes, tissues frozen section, polymerase chain reaction (PCR) and dot blot of testes was performed at 30, 40, 50, 60, 70 and 80 ...

  8. presence of cryptococcus species in domestic chicken

    African Journals Online (AJOL)

    2009-05-25

    May 25, 2009 ... E.K. Kemoi, BSc, MSc, P. O. Box 6421, Nairobi, P. Okemo, BSc, MSc, PhD, Department of Plant and Microbial Sciences, kenyatta University, P. O. Box 43844, ... diseases from domestic Chickens for example avian flu and salmonelosis. .... dopachrome intermediates, to melanin polymers. ii. Urease test.

  9. Production Performance of Indigenous Chicken under Semi ...

    African Journals Online (AJOL)

    A study to evaluate four indigenous chicken – namely: Horasi, Kuchi, Naked neck and Frizzled in order to obtain grand-parent and parent stocks was carried out at Tanzania Livestock Research Institute, Mpwapwa district of Dodoma, Tanzania. The perfomance of the ecotypes were compared so as to come out with the best ...

  10. Poultry coccidial infection in local chickens from

    African Journals Online (AJOL)

    ta 7 (Stata Corporation, 2001) statistical program was employed for the data analysis. The prevalence of ... Coccidial infection in this system is not known to farmers and also over- looked by public and private ... density of chickens kept in the study area, season of the year and agro-ecology. Compared to the intensive ...

  11. Occurrence of Plasmodium gallenaecium Parasites in Chickens ...

    African Journals Online (AJOL)

    A total of forty six Local Chickens (Gallus gallus) were obtained from Wudil Market in Wudil Local Government Area in January 2009. The birds were screened for malaria parasite by making thick and thin blood films on slides. The slides were examined for the presence of plasmodium parasite (parasitaemia Value). Results ...

  12. Dispersive micro solid phase extraction of amantadine, rimantadine and memantine in chicken muscle with magnetic cation exchange polymer.

    Science.gov (United States)

    Chen, Dawei; Miao, Hong; Zhao, Yunfeng; Wu, Yongning

    2017-04-15

    This study demonstrated a novel dispersive micro solid phase extraction (DMSPE) method for extraction of adamantane drugs (amantadine, rimantadine and memantine) in chicken muscle. The adamantane drugs were extracted from chicken muscle using 1% acidic acetonitrile as extraction solvent. The cleanup of fatty matrices from analytes was achieved by the DMSPE technique using magnetic cation exchange polymer as adsorbent. In this procedure, the experimental parameters and conditions were optimized in detail for the improvement of extraction efficiency. The method showed low limit of detection of 0.03μg/kg and recoveries of the analytes ranged from 87.2% to 109.3% for adamantane drugs. The proposed DMSPE method proved to be simple, effective and suitable for the treatment of adamantane drugs in chicken muscle with a relatively shorter extraction time. Copyright © 2017. Published by Elsevier B.V.

  13. Comparative Study of Human Liver Ferritin and Chicken Liver by Moessbauer Spectroscopy. Preliminary Results

    Energy Technology Data Exchange (ETDEWEB)

    Oshtrakh, M. I. [Ural State Technical University - UPI, Division of Applied Biophysics, Faculty of Physical Techniques and Devices for Quality Control (Russian Federation); Milder, O. B.; Semionkin, V. A. [Ural State Technical University - UPI, Faculty of Experimental Physics (Russian Federation); Prokopenko, P. G. [Russian State Medical University, Faculty of Biochemistry (Russian Federation); Malakheeva, L. I. [Simbio Holding, Science Consultation Department (Russian Federation)

    2004-12-15

    A comparative study of normal human liver ferritin and livers from normal chicken and chicken with Marek disease was made by Moessbauer spectroscopy. Small differences of quadrupole splitting and isomer shift were found for human liver ferritin and chicken liver. Moessbauer parameters for liver from normal chicken and chicken with Marek disease were the same.

  14. Shear shedding of drops and the use of superhydrophobic surfaces in microgravity: PFC and ground based results

    Science.gov (United States)

    Milne, Andrew; Amirfazli, Alidad

    In free fall, the absence of gravity poses many challenges for fluid handling systems. One such example of this is condensers. On earth, the condensed liquid is removed from the tilted condenser plate by gravity forced shedding. In microgravity, proposed solutions include the use of surfaces with gradients in wettability [1], the use of electrowetting [2], and shearing airflow [3]. In this talk, shear shedding results for a variety of surface (hydrophilic to superhydrophobic (extremely water repelling)) will be presented. Surface science and aerodynamics are used to reveal fundamental parameters controlling incipient motion for drops exposed to shearing airflow. It is found that wetting parameters such as contact angle and surface tension are very influential in determining the minimum required air velocity for drop shedding. Based on experimental results for drops of water and hexadecane (0.5-100 l) on PMMA, Teflon, and a superhydrophobic aluminum surface, an exponential function is proposed that relates the critical air velocity for shedding to the ratio of drop base length to projected area. The results for the water systems can be collapsed to a self similar curve by normalization, which also explains results from other researchers. Since shedding from superhydrophobic surfaces (SHS) is seen to be easier compared to other surfaces, the behaviour of SHS is also probed in this talk. SHS have space-based applications to shedding, self cleaning, anti-icing (spacecraft launch/re-entry), anti-fouling, fluid actuation, and decreased fluid friction. The mechanism for SHS is understood to be the existence of an air layer between large portions of the drop and solid. The first concrete visual evidence of this was gained performing a parabolic flight experiment with the ESA. Results of this experi-ment will be discussed, showing the extreme water repelling potential of SHS in microgravity, and demonstrating how the wetting behaviours seen (partial penetration, transition

  15. Association of AMPK subunit gene polymorphisms with growth, feed intake, and feed efficiency in meat-type chickens.

    Science.gov (United States)

    Jin, Sihua; Moujahid, El Mostafa El; Duan, Zhongyi; Zheng, Jiawei; Qu, Lujiang; Xu, Guiyun; Yang, Ning; Chen, Sirui

    2016-07-01

    Investigations on regulatory genes of feed intake will provide a rational scientific basis to improve future selection indices for more efficient chickens. In the present study, we investigated the association of 13 previously reported SNPs in the chicken adenosine monophosphate activated protein kinase (AMPK) subunits PRKAB1, PRKAG2, and PRKAG3 genes with body weight (BW), body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR) in two distinct yellow meat-type strains. Six SNPs with a very low minor allele frequency were removed by genotype quality control and data filtering. The experimental population comprised 796 pedigreed males from two strains with different genetic backgrounds, 335 chickens from N202 and 461 chickens from N301. BW at 49 (BW49) and 70 days of age (BW70) and FI (from 49 to 70 days of age) were determined individually. BWG and FCR were computed based on BW and FI in the interval between 49 to 70 days. The results indicated that PRKAB1 SNPs rs14094358 and rs14094362 were significantly associated with BW70, BWG, and FI in the N202 strain, and rs14094361 and rs14094363 were significantly associated with FI and FCR in the N301 strain (P feed intake, and feed efficiency that may be applied in meat-type chicken breeding programs. © 2016 Poultry Science Association Inc.

  16. Pork and Chicken Meals Similarly Impact on Cognitive Function and Strength in Community-Living Older Adults: A Pilot Study.

    Science.gov (United States)

    Charlton, Karen; Walton, Karen; Batterham, Marijka; Brock, Erin; Langford, Kelly; McMahon, Anne; Roodenrys, Steven; Koh, Freda; Host, Alison; Crowe, Ruth; Thornhill, Kayla

    2016-01-01

    A pilot quasi-experimental study investigated whether provision of pork, a rich source of thiamin, as the main protein source in meals four times/week for 12 weeks resulted in improved muscle mass, body strength, and cognitive function in community-living older adults compared to similar meals containing chicken. Retirement villages were randomized to receive pre-prepared frozen meals containing either pork or chicken. Dietary intake was assessed by three-day food records and cognitive domains assessed using validated tests. Hand grip strength was measured and lower extremity performance assessed by the sit-to-stand test, get-up-and-go test and six-minute walk test. Forty-eight volunteers participated (78.2 ± 6.2 y). In linear mixed models, controlling for baseline physical activity and dietary protein and energy intake, no differences were found between pork (n = 19) and chicken (n = 12) groups. The chicken group had improved Rey Auditory Verbal Learning test scores (verbal learning and memory) at six weeks (p pork meals a week did not result in improvements in cognitive function, nor measures of strength or physical function, compared to those receiving chicken meals in healthy older adults. This suggests that merely changing the type of dietary protein provided by meat does not impact physical or cognitive function.

  17. Pathologic lesions caused by coinfection of Mycoplasma gallisepticum and H3N8 low pathogenic avian influenza virus in chickens.

    Science.gov (United States)

    Stipkovits, L; Glavits, R; Palfi, V; Beres, A; Egyed, L; Denes, B; Somogyi, M; Szathmary, S

    2012-03-01

    Chickens were infected under experimental conditions with Mycoplasma gallisepticum and low pathogenic avian influenza (LPAI) strain A/mallard/Hungary/19616/07 (H3N8). Two groups of chickens were aerosol challenged with M. gallisepticum strain 1226. Seven days later, one of these groups and one mycoplasma-free group was challenged with LPAI H3N8 virus; one group without challenge remained as negative control. Eight days later, the birds were euthanized and examined for gross pathologic and histologic lesions. The body weight was measured, and the presence of antimycoplasma and antiviral antibodies was tested before the mycoplasma challenge, before the virus challenge, and at the end of the study to confirm both infections. Chickens in the mycoplasma-infected group developed antibodies against M. gallisepticum but not against the influenza virus. Chickens of the group infected with the influenza virus became serologically positive only against the virus, while the birds in the coinfected group developed antibodies against both agents. The LPAI H3N8 virus strain did not cause decrease in body weight and clinical signs, and macroscopic pathological lesions were not present in the chickens. The M. gallisepticum infection caused respiratory signs, airsacculitis, and peritonitis characteristic of mycoplasma infection. However, the clinical signs and pathologic lesions and the reduction in weight gain were much more significant in the group challenged with both M. gallisepticum and LPAI H3N8 virus than in the group challenged with M. gallisepticum alone.

  18. Physical and Microbiological Qualities of Kampong-Broiler Crossbred Chickens Meat Raised in Different Stocking Densities

    Directory of Open Access Journals (Sweden)

    C. A. Patria

    2016-12-01

    Full Text Available The crossbreeding between broiler and kampong chickens has been performed to develop a kampong-broiler strain chicken. The chicken stocking condition needs more attention as a part of animal welfare. This study was performed to identify the relationship between the stocking density and the stress based on Temperature Humidity Index (THI and the effect of stocking density on meat quality, i.e., physical, microbiological, and organoleptic. Ninety DOCs of Kampong-Broiler (KB were assigned into a completely randomized design with 3 treatments of stocking density  i.e., 8, 10, and 12 birds m-2. Each treatment was replicated 3 times. The experimental chickens were housed in 9 blocks of housing each with 1 x 1 m2 size. Data on physical and microbiology of meat qualities were analyzed with analysis of variance and continued with Duncan’s multiple range test. The organoleptic data were analyzed by using Kruskal-Wallis test. The result showed that the stocking density did not significantly affect the physical and hedonic quality of KB chicken’s breast. The stocking densities significantly affected (P<0.05 the microbiological variables of breast meat. The average value of THI during maintenance reached 28.98±1.25–29.33±1.32oC. The higher the animal density the higher the THI value that correlated to the stress condition. However, high stocking density did not affect the physical and hedonic quality of breast meat,  thus it can be accepted by the consumers. The higher the stocking density the higher the total plate count, Escherichia coli, and Staphylococcus aureus, without the presence of Salmonella sp. The meat quality of KB chickens raised in the stocking density of 10 birds m-2 meets the requirement of SNI 01-3924-2009.

  19. Effect of organic acids on Salmonella colonization and shedding in weaned piglets in a seeder model.

    Science.gov (United States)

    Michiels, Joris; Missotten, Joris; Rasschaert, Geertrui; Dierick, Noël; Heyndrickx, Marc; De Smet, Stefaan

    2012-11-01

    Piglets (n = 128) weaned at 21 days of age were used in a 35-day seeder model to evaluate the effects of dietary additives differing in active ingredients, chemical, and physical formulation, and dose on Salmonella colonization and shedding and intestinal microbial populations. Treatments were a negative control (basal diet), the positive control (challenged, basal diet), and six treatments similar to the positive control but supplemented with the following active ingredients (dose excluding essential oils or natural extracts): triglycerides with butyric acid (1.30 g kg(-1)); formic and citric acids and essential oils (2.44 g kg(-1)); coated formic, coated sorbic, and benzoic acids (2.70 g kg(-1)); salts of formic, sorbic, acetic, and propionic acids, their free acids, and natural extracts (2.92 g kg(-1)); triglycerides with caproic and caprylic acids and coated oregano oil (1.80 g kg(-1)); and caproic, caprylic, lauric, and lactic acids (1.91 g kg(-1)). On day 6, half the piglets (seeder pigs) in each group were orally challenged with a Salmonella Typhimurium nalidixic acid-resistant strain (4 × 10(9) and 1.2 × 10(9) log CFU per pig in replicate experiments 1 and 2, respectively). Two days later, they were transferred to pens with an equal number of contact pigs. Salmonella shedding was determined 2 days after challenge exposure and then on a weekly basis. On day 34 or 35, piglets were euthanized to sample tonsils, ileocecal lymph nodes, and ileal and cecal digesta contents. The two additives, both containing short-chain fatty acids and one of them also containing benzoic acid and the other one also containing essential oils, and supplemented at more than 2.70 g kg(-1), showed evidence of reducing Salmonella fecal shedding and numbers of coliforms and Salmonella in cecal digesta. However, colonization of tonsils and ileocecal lymph nodes by Salmonella was not affected. Supplementing butyric acid and medium-chain fatty acids at the applied dose failed to inhibit

  20. Numerical study of wingtip shed vorticity reduction by wing Boundary Layer Control

    Science.gov (United States)

    Posada, Jose Alejandro

    Wingtip vortex reductions have been obtained by Boundary Layer Control application to an AR=1.5 rectangular wing using a NACA 0012 airfoil. If wingtip shed vorticity could be reduced significantly, then so would induced drag resulting in improved cruise fuel economy. Power savings would be even more impressive at low flight speed or in climb. A two dimensional wing produces lift without wingtip vorticity. Its bound vorticity, Gamma, equals the contour integral of the boundary layer vorticity gamma or Gamma = ∮gamma · dl. Where the upper and lower boundary layers meet at the cusped TE, their local static pressure pu=pl then the boundary layer outer edge inviscid velocity Vupper=Vlower and gammalower=-gamma upper. This explains the 2-D wing self cancellation of the upper and lower surface boundary layer vorticity when they meet upon shedding at the trailing edge. In finite wings, the presence of spanwise pressure gradients near the wing tips misaligns gammalower and gammaupper at the wingtip TE preventing the upper and lower surface boundary layers from completely canceling each other. To prevent them from generating wing tip vortices, the local boundary layers need to be captured in suction slots. Once vorticity is captured, it can be eliminated by viscous mixing prior to venting over board. The objective of this dissertation was to use a commercial Computational Fluid Dynamics code (Fluent) to search for the best configuration to locate BLC suction slots to capture non-parallel boundary layer vorticity prior to shedding near the wingtips. The configuration selected for running the simulations was tested by trying to duplicate a 3D wing for which sufficient experimental and computational models by others are available. The practical case selected was done by Chow et al in the 32 x 48 in. low speed wind tunnel at the Fluid Mechanics Laboratory of NASA Ames Research Center, and computationally analyzed by Dacles-Mariani et al, and Khim and Rhee. The present

  1. The evolution of chicken stem cell culture methods.

    Science.gov (United States)

    Farzaneh, M; Attari, F; Mozdziak, P E; Khoshnam, S E

    2017-12-01

    1. The avian embryo is an excellent model for studying embryology and the production of pharmaceutical proteins in transgenic chickens. Furthermore, chicken stem cells have the potential for proliferation and differentiation and emerged as an attractive tool for various cell-based technologies. 2. The objective of these studies is the derivation and culture of these stem cells is the production of transgenic birds for recombinant biomaterials and vaccine manufacture, drug and cytotoxicity testing, as well as to gain insight into basic science, including cell tracking. 3. Despite similarities among the established chicken stem cell lines, fundamental differences have been reported between their culture conditions and applications. Recent conventional protocols used for expansion and culture of chicken stem cells mostly depend on feeder cells, serum-containing media and static culture. 4. Utilising chicken stem cells for generation of cell-based transgenic birds and a variety of vaccines requires large-scale cell production. However, scaling up the conventional adherent chicken stem cells is challenging and labour intensive. Development of a suspension cell culture process for chicken embryonic stem cells (cESCs), chicken primordial germ cells (PGCs) and chicken induced pluripotent stem cells (ciPSCs) will be an important advance for increasing the growth kinetics of these cells. 6. This review describes various approaches and suggestions to achieve optimal cell growth for defined chicken stem cells cultures and use in future manufacturing applications.

  2. Parallel Evolution of Polydactyly Traits in Chinese and European Chickens.

    Science.gov (United States)

    Zhang, Zebin; Nie, Changsheng; Jia, Yaxiong; Jiang, Runshen; Xia, Haijian; Lv, Xueze; Chen, Yu; Li, Junying; Li, Xianyao; Ning, Zhonghua; Xu, Guiyun; Chen, Jilan; Yang, Ning; Qu, Lujiang

    2016-01-01

    Polydactyly is one of the most common hereditary congenital limb malformations in chickens and other vertebrates. The zone of polarizing activity regulatory sequence (ZRS) is critical for the development of polydactyly. The causative mutation of polydactyly in the Silkie chicken has been mapped to the ZRS; however, the causative mutations of other chicken breeds are yet to be established. To understand whether the same mutation decides the polydactyly phenotype in other chicken breeds, we detected the single-nucleotide polymorphism in 26 different chicken breeds, specifically, 24 Chinese indigenous breeds and 2 European breeds. The mutation was found to have fully penetrated chickens with polydactyly in China, indicating that it is causative for polydactyly in Chinese indigenous chickens. In comparison, the mutation showed no association with polydactyly in Houdan chickens, which originate from France, Europe. Based on the different morphology of polydactyly in Chinese and European breeds, we assumed that the trait might be attributable to different genetic foundations. Therefore, we subsequently performed genome-wide association analysis (GWAS) to locate the region associated with polydactyly. As a result, a ~0.39 Mb genomic region on GGA2p was identified. The region contains six candidate genes, with the causative mutation found in Chinese indigenous breeds also being located in this region. Our results demonstrate that polydactyly in chickens from China and Europe is caused by two independent mutation events that are closely located in the chicken genome.

  3. Mitochondrial Remodeling in Chicken Induced Pluripotent Stem-Like Cells.

    Science.gov (United States)

    Choi, Hyun Woo; Kim, Jong Soo; Choi, Sol; Ju Hong, Yean; Byun, Sung June; Seo, Han Geuk; Do, Jeong Tae

    2016-03-15

    Chicken pluripotent stem cells (PSCs), such as embryonic stem cells and blastoderm cells, have been used to study development and differentiation in chicken. However, chicken PSCs are not widely used because they are hard to maintain in long-term culture. Recent reports suggest that chicken somatic cells can be reprogrammed to pluripotent state by defined factors to form induced pluripotent stem cells (iPSCs). These chicken iPSCs showed pluripotent differentiation potential and could be maintained in long-term culture. However, intracytoplasmic remodeling during reprogramming of chicken cells remains largely unknown. In this study, we generated chicken iPS-like cells (ciPSLCs) from chicken embryonic fibroblasts using a retroviral expression system encoding human reprogramming factors. These ciPSLCs could be maintained for more than 10 passages and expressed the endogenous chicken pluripotency markers, cNonog and cSox2. Moreover, the ciPSLCs showed higher nucleus to cytoplasm ratio and contained globular mitochondria with immature cristae. This morphology was similar to that of mammalian PSCs, but different from that of avian somatic cells, which showed lower nucleus to cytoplasm ratio and mature mitochondria. These results suggest that intracytoplasmic organelles in differentiated somatic cells could be successfully remodeled into the pluripotent state during reprogramming in chicken.

  4. Chickens Are a Lot Smarter than I Originally Thought”: Changes in Student Attitudes to Chickens Following a Chicken Training Class

    Science.gov (United States)

    Hazel, Susan J.; O’Dwyer, Lisel; Ryan, Terry

    2015-01-01

    Simple Summary Our attitudes to animals are linked to our beliefs about their cognitive abilities, such as intelligence and capacity to experience emotional states. In this study, undergraduate students were surveyed on their attitudes to chickens pre- and post- a practical class in which they learnt to clicker train chickens. Students were more likely to agree that chickens are intelligent and easy to teach tricks to, and that chickens feel emotions such as boredom, frustration and happiness, following the practical class. Similar workshops may be an effective method to improve animal training skills, and promote more positive attitudes to specific animal species. Abstract A practical class using clicker training of chickens to apply knowledge of how animals learn and practice skills in animal training was added to an undergraduate course. Since attitudes to animals are related to their perceived intelligence, surveys of student attitudes were completed pre- and post- the practical class, to determine if (1) the practical class changed students’ attitudes to chickens and their ability to experience affective states, and (2) any changes were related to previous contact with chickens, training experience or gender. In the post- versus pre-surveys, students agreed more that chickens are easy to teach tricks to, are intelligent, and have individual personalities and disagreed more that they are difficult to train and are slow learners. Following the class, they were more likely to believe chickens experience boredom, frustration and happiness. Females rated the intelligence and ability to experience affective states in chickens more highly than males, although there were shifts in attitude in both genders. This study demonstrated shifts in attitudes following a practical class teaching clicker training in chickens. Similar practical classes may provide an effective method of teaching animal training skills and promoting more positive attitudes to animals. PMID

  5. Multi-frequency response of a cylinder subjected to vortex shedding and support motions

    Energy Technology Data Exchange (ETDEWEB)

    Vikestad, Kyrre

    1998-12-31

    This thesis deals with an experimental investigation of vortex induced vibrations of a circular cylinder. The purpose of the experiment was to identify the influence from a controlled disturbance of the cylinder motions on the response caused by vortex shedding. The cylinder investigated is 2 m long and the diameter is 10 cm. The cylinder is elastically mounted in an apparatus using springs, where the foundation of one of the springs can have a harmonic motion. The apparatus is placed on a carriage in a 25 m long towing tank. Towing velocities are varied between 0.140 m/s and 0.655 m/s corresponding to reduced velocity range from 2.8 to 13.2. The still water natural frequency is 0.497 Hz, and the natural frequency in air is 0.634 Hz. The cylinder is only able to oscillate in the cross-flow direction. The support motion frequency was varied between 0.26 Hz and 1.01 Hz, and the force motion amplitude was varied using 2, 4 and 6 cm support amplitudes. Three sets of experiments were carried out: (1) Still water oscillations due to harmonic support motion excitation, support amplitude and frequencies varied, (2) Towing tests with no support motion, the velocity is varied, (3) Combined excitation: Towing tests with support motion. All possible combinations of experiments (1) and (2) are carried out. The two first experiments provide reference values for the combined excitation experiments and for verification purposes. The results reveal the ability of the external disturbance to influence the vortex shedding process both regarding frequency and the resulting response amplitudes. Results for added mass, in-line drag and damping are also obtained. The work may be of use in deep water floating petroleum production. 81 refs., 73 figs., 6 tabs.

  6. Tissue integrity is essential for ectopic implantation of human endometrium in the chicken chorioallantoic membrane.

    Science.gov (United States)

    Nap, Annemiek W; Groothuis, Patrick G; Demir, Ayse Y; Maas, Jacques W M; Dunselman, Gerard A J; de Goeij, Anton F P M; Evers, Johannes L H

    2003-01-01

    Not all women with patent tubes develop clinically manifest endometriosis. Quality and quantity of endometrium in retrograde menstruation may be the determining factor in the development of the disease. We hypothesize that retrograde shedding of endometrial fragments with preserved integrity facilitates implantation of endometrium in ectopic locations, resulting in endometriotic lesion development. We evaluate the impact of tissue integrity on the success of endometriosis-like lesion development in the chicken embryo chorioallantoic membrane (CAM) model. Menstrual and non-menstrual (cyclic) endometrium were collected by biopsy, and either minced or enzymatically dispersed. Spontaneously shed menstrual effluent was collected by a menstrual cup, and cells and tissue were isolated. We evaluated whether infiltration or lesion formation in the CAM occurred after transplantation of endometrium onto the CAM. Transplantation of biopsied menstrual and cyclic endometrium fragments, and of endometrium fragments >1 mm(3) isolated from menstrual effluent, resulted in lesion formation. Transplantation of endometrial cells isolated from menstrual effluent did not lead to lesion formation. After transplantation of digested biopsied cyclic endometrium, infiltration in the CAM but no lesions were observed. In the CAM assay, integrity of tissue architecture determines success of implantation of human endometrium in ectopic locations.

  7. Dietary Administration of Olive Mill Wastewater Extract Reduces Campylobacter spp. Prevalence in Broiler Chickens

    Directory of Open Access Journals (Sweden)

    Raffaella Branciari

    2016-08-01

    Full Text Available Food wastes are sources of compounds that can be used as natural additives in the food and feed industry. The olive oil industry produces two main wastes: aqueous waste (olive mill wastewater and solid waste (pomace or olive cake. These by-products are rich in phenols, which are antioxidant and antimicrobial compounds able to inhibit or delay the growth of several bacteria in vitro. The dietary effect of both olive mill wastewater polyphenolic extract (OMWPE and dehydrated olive cake (DOC on the prevalence of Campylobacter spp. in broiler chickens was investigated. A commercial basal diet was supplemented with either OMWPE- or DOC-enriched maize at two dosages (low: 16%; high: 33%. The prevalence of Campylobacter spp. shedding was evaluated at 21, 35, and 49 days of age. The prevalence of Campylobacter spp. differed among groups only at 49 days of age. Both OMWPE groups showed a lower (p < 0.05 prevalence compared to the control group. The odds ratio evaluation showed that the higher dose of OMWPE reduced the possibility of shedding 11-fold compared to the control group (p < 0.001. These results highlight the potential use of olive by-products against Campylobacter spp. in poultry.

  8. Eddy Generation and Shedding in a Tidally Energetic Channel

    Science.gov (United States)

    McIlvenny, J.; Gillibrand, P. A.; Walters, R. A.

    2016-02-01

    The Pentland Firth in northern Scotland, and its subsidiary channel the Inner Sound, are currently under scrutiny as the first tidal energy array in the world is installed during 2016. The tidal flows in the channel and sound have been intensively observed and modelled in recent years, and the turbulent nature of the flow, with features of eddy generation and shedding, is becoming increasingly well known. Turbulence and eddies pose potential risks to the turbine infrastructure through enhanced stress on the blades, while understanding environmental effects of energy extraction also requires accurate simulation of the hydrodynamics of the flow. Here, we apply a mixed finite element/finite volume hydrodynamic model to the northern Scottish shelf, with a particular focus on flows through the Pentland Firth and the Inner Sound. We use an unstructured grid model, which allows the open boundaries to be far removed from the region of interest, while still allowing a grid spacing of 40m in the Inner Sound. The model employs semi-implicit techniques to solve the momentum and free surface equations, and semi-Lagrangian methods to solve the material derivative in the momentum equation, making it fast, robust and accurate and suitable for simulating flows in irregular coastal ocean environments. The model is well suited to address questions relating to tidal energy potential. We present numerical simulations of tidal currents in The Pentland Firth and Inner Sound. Observed velocities in the Inner Sound, measured by moored ADCP deployments, reach speeds of up to 5 m s-1 and the model successfully reproduces these strong currents. In the simulations, eddies are formed by interactions between the strong flow and the northern and southern headlands on the island of Stroma; some of these eddies are trapped and remain locked in position, whereas others are shed and transported away from the generation zone. We track the development and advection of eddies in relation to the site of

  9. Direct effects of Moringa oleifera Lam (Moringaceae) acetone leaf extract on broiler chickens naturally infected with Eimeria species.

    Science.gov (United States)

    Ola-Fadunsin, Shola David; Ademola, Isaiah Oluwafemi

    2013-08-01

    Avian coccidiosis is one of the most important diseases of poultry and it is responsible for a large number of all broiler mortalities worldwide. The control of this disease relies mainly on the use of anticoccidial drugs. However, herbal preparations could be an alternative for the treatment against coccidiosis in chickens. The direct effects of Moringa oleifera acetone extracts on broiler chickens naturally infected with mixed Eimeria species was investigated to determine the relative efficacy of the extracts against coccidiosis in birds. The investigations were carried out in seven groups (ten chickens per group). The birds were given various doses (1.0, 2.0, 3.0, 4.0 and 5.0 g/kg body weight) of acetone extract of leaves of M. toltrazuril (positive control) and untreated (negative control). The extract was evaluated for anticoccidial activity by means of inhibition of oocyst output in faeces, faecal score, weight gain and mortality. Haematological indices were evaluated by standard methods. The group treated with 1.0 g/ kg body weight Moringa oleifera extract produced the least inhibitory effect on oocyst shed in the faeces (96.4%), while the groups treated with 2.0 g/kg, 3.0 g/kg, 4.0 g/kg and 5.0 g/kg body weight of the extract produced 97.4, 98.7, 99.1 and 99.8%, respectively. Body weight gains of infected chickens treated with the extract significantly improved (p Moringa oleifera leaves could find application in the treatment of avian coccidiosis in veterinary practice.

  10. Men's Sheds and the experience of depression in older Australian men.

    Science.gov (United States)

    Culph, Jennifer S; Wilson, Nathan J; Cordier, Reinie; Stancliffe, Roger J

    2015-10-01

    Men's Sheds are community spaces where, usually, older men can socialise as they participate in a range of woodwork and other activities. There is currently little research evidence supporting the anecdotally reported mental health and wellbeing benefits of Men's Sheds. This research project investigated how older men with self-reported symptoms of depression experience their participation in Men's Sheds. This study included in-depth interviews and administration of the Beck Depression Inventory-II with 12 men from 3 Men's Sheds, triangulated with observation of the different shed environments. Interviews explored how participation in the Men's Shed, living in a regional area, and retirement intersected with experiences of depression. Participants had either self-reported symptoms of depression or a diagnosis of depression. The findings from this study support the notion that participation at Men's Sheds decreases self-reported symptoms of depression. Beck Depression Inventory-II scores showed that most participants were currently experiencing minimal depression. The Men's Sheds environment promoted a sense of purpose through relationships and in the sharing of skills, new routines, motivation, and enjoyment for its members. The shed encouraged increased physical activity and use of cognitive skills. Finally, participants reported feelings of pride and achievement which had an impact on their sense of self-worth. Men's Sheds provide an opportunity to promote health and wellbeing among retired men. The shed's activity and social focus offers a way to help men rediscover purpose and self. Further research is required to measure symptoms of depression before and after participation in Men's Sheds. © 2015 Occupational Therapy Australia.

  11. The risk of salmonellae shedding by dogs fed Salmonella-contaminated commercial raw food diets

    OpenAIRE

    Finley, Rita; Ribble, Carl; Aramini, Jeff; Vandermeer, Meredith; Popa, Maria; Litman, Marcus; Reid-Smith, Richard

    2007-01-01

    Twenty-eight research dogs were enrolled to determine the prevalence of salmonellae shedding after consumption of 1 Salmonella-contaminated commercial raw food diet meal. Sixteen dogs were exposed to Salmonella-contaminated commercial raw food diets and 12 to Salmonella-free commercial raw food diets. Seven of the exposed dogs shed salmonellae 1–7 days after consumption of Salmonella-contaminated raw food diets. None of the dogs fed Salmonella-free diets shed salmonellae. No clinical signs we...

  12. [Efficient packaging retrovirus and construction of transgenic chicken technical platform].

    Science.gov (United States)

    Man, Chaolai; Zhang, Qing; Chen, Yan; Zhu, Dahai

    2007-10-01

    Transgenic chicken and oviduct bioreactor are growing to be one of the hotspot of scientific study in the field of biology. The most successful method of producing transgenic chicken is pseudotyped retrovirus vector system, but no one has reported the production of transgenic chicken by retrovirus system recently in our country. In order to accelerate our study in this field, we introduced the relevant technical methods such as packaging retrovirus and vesicular stomatitis virus G glycoprotein (VSV-G) pseudotyped retrovirus, optimizing the conditions of packaging retrovirus, concentrating VSV-G pseudotyped retrovirus, helper virus assays, and microinjection of retrovirus. Furthermore, we successfully conducted in vivo study for detecting the marker gene EGFP of chicken embryo as well as in vitro study for detecting that gene of chicken embryo myoblast (CFM), thus we have provided an applied technical platform for studies of transgenic chicken in the future.

  13. CONTENT OF NUTRIENTS AND NUTRICINES - CARNOSINE IN DARK CHICKEN MEAT

    Directory of Open Access Journals (Sweden)

    Gordana Kralik

    2010-06-01

    Full Text Available The aim of this study was to determine content of nutrients and carnosine concentration in thighs (dark meat of chickens of the Ross 308 provenance with respect to chicken gender. Amount of carnosine is determined by the HPLC device. Thigh muscle tissue of female and male chickens contains 339.28±68.17 μg/g and 319.29±65.47 μg/g of carnosine (P>0.05, respectively. Live end weights of chickens are also shown, with average male chickens weights of 2377 g and female chickens 2104 g (P0.05 are also shown. The obtained research results are explained in the context of other relevant studies on a similar topic.

  14. Results of an international phosphorus digestibility ring test with broiler chickens

    DEFF Research Database (Denmark)

    Rodehutscord, Markus; Adeola, O; Angel, R

    2016-01-01

    The objective of this ring test was to investigate the prececal phosphorus (P) digestibility of soybean meal (SBM) in broiler chickens using the trial protocol proposed by the World's Poultry Science Association. It was hypothesized that prececal P digestibility of SBM determined in the collabora......The objective of this ring test was to investigate the prececal phosphorus (P) digestibility of soybean meal (SBM) in broiler chickens using the trial protocol proposed by the World's Poultry Science Association. It was hypothesized that prececal P digestibility of SBM determined...... among stations. These factors were probably related to the feeding and housing conditions (floor pens or cages) of the birds in the pre-experimental phase. Therefore, we suggest that the World's Poultry Science Association protocol for the determination of digestible P be should extended...

  15. Far-infrared and 3D imaging for doneness assessment in chicken breast

    Science.gov (United States)

    Tao, Yang; Ibarra, Juan G.

    2001-03-01

    Sensor fusion of infrared imaging and range imaging was proposed to estimate internal temperature on just cooked chicken breasts. An infrared camera operating at 8-12 microns registered surface temperature of cooked meat samples, while a single line structured light system located the thickest region of the meat target. In this region of interest, a combined time series/neural network method is applied to correlate the internal and external temperatures during the cool-down process. Experimental verification in a pilot plant oven is presented. To ensure food safety, a mandatory regulation requires all poultry processors in the U.S.A to verify that all ready-to-eat products reach a minimum endpoint temperature (71¦C for chicken breast), but no current assay can do a non-invasively inspection of all the samples. The proposed system has the potential for on-line inspection of ready-to-eat meat for food quality and safety.

  16. Studies of generation of B-cell diversity in mouse, man, and chicken

    Energy Technology Data Exchange (ETDEWEB)

    Cooper, M.D.; Kearney, J.F.; Lydyard, P.M.; Grossi, C.E.; Lawton, A.R.

    1977-01-01

    We have compared the development of B cells in chickens, mice, and humans, attempting wherever possible to use the differences among them to experimental advantage. Because expression of immunoglobulins at the cell surface occurs earlier in the life history of B cells in chickens, we used them to study generation of diversity of antigen-binding cells (ABC). Studies in mammals have focused on the parallel problem of expression of different immunoglobulin classes. Our studies suggest that clonal diversity is generated sequentially in a programmed manner and first among B cells that express only IgM, and Ig class heterogeneity is developed secondarily by an antigen-independent switch in expression of heavy-chain genes by members of each B-cell clone.

  17. The Men's Shed: providing biopsychosocial and spiritual support.

    Science.gov (United States)

    Moylan, Matthew M; Carey, Lindsay B; Blackburn, Ric; Hayes, Rick; Robinson, Priscilla

    2015-02-01

    Community Men's Sheds (CMS) have been a unique approach within Australia for addressing and promoting men's health and well-being issues by providing biopsychosocial support. Given the decline of traditional religious influence, and the contemporary understanding of 'spirituality', it can be argued that CMS may also develop and demonstrate characteristics of a communal spirituality. This research aimed to explore the individual and community contribution of CMS in terms of men's health and well-being and subsequently whether CMS programmes satisfied the contemporary and consensus understanding of spirituality. A qualitative case study was undertaken combining both participant observation over a 6-month period and semi-structured in-depth interviews with 21 men of varying ages and occupations attending a Melbourne suburban CMS (Victoria, Australia). Thematic analysis indicated that the CMS provided a number of health and well-being benefits at individual, family, community and public health levels. These included increased self-esteem and empowerment, respite from families, a sense of belonging in the community and the opportunity to exchange ideas relating to personal, family, communal and public health issues. It is concluded that CMS, through the provision of an appropriate spatial context and organizational activities, encourage intra-personal and inter-personal reflection and interaction that subsequently results in men meaningfully, purposefully and significantly connecting with the moment, to self, to others and to their environment-and thus, CMS not only provides biopsychosocial support but can also deliver spiritual support.

  18. CFTR Modulators: Shedding Light on Precision Medicine for Cystic Fibrosis

    Science.gov (United States)

    Lopes-Pacheco, Miquéias

    2016-01-01

    Cystic fibrosis (CF) is the most common life-threatening monogenic disease afflicting Caucasian people. It affects the respiratory, gastrointestinal, glandular and reproductive systems. The major cause of morbidity and mortality in CF is the respiratory disorder caused by a vicious cycle of obstruction of the airways, inflammation and infection that leads to epithelial damage, tissue remodeling and end-stage lung disease. Over the past decades, life expectancy of CF patients has increased due to early diagnosis and improved treatments; however, these patients still present limited quality of life. Many attempts have been made to rescue CF transmembrane conductance regulator (CFTR) expression, function and stability, thereby overcoming the molecular basis of CF. Gene and protein variances caused by CFTR mutants lead to different CF phenotypes, which then require different treatments to quell the patients’ debilitating symptoms. In order to seek better approaches to treat CF patients and maximize therapeutic effects, CFTR mutants have been stratified into six groups (although several of these mutations present pleiotropic defects). The research with CFTR modulators (read-through agents, correctors, potentiators, stabilizers and amplifiers) has achieved remarkable progress, and these drugs are translating into pharmaceuticals and personalized treatments for CF patients. This review summarizes the main molecular and clinical features of CF, emphasizes the latest clinical trials using CFTR modulators, sheds light on the molecular mechanisms underlying these new and emerging treatments, and discusses the major breakthroughs and challenges to treating all CF patients. PMID:27656143

  19. Correlates of HIV-1 genital shedding in Tanzanian women.

    Directory of Open Access Journals (Sweden)

    Clare Tanton

    2011-03-01

    Full Text Available Understanding the correlates of HIV shedding is important to inform strategies to reduce HIV infectiousness. We examined correlates of genital HIV-1 RNA in women who were seropositive for both herpes simplex virus (HSV-2 and HIV-1 and who were enrolled in a randomised controlled trial of HSV suppressive therapy (aciclovir 400 mg b.i.d vs. placebo in Tanzania.Samples, including a cervico-vaginal lavage, were collected and tested for genital HIV-1 and HSV and reproductive tract infections (RTIs at randomisation and 6, 12 and 24 months follow-up. Data from all women at randomisation and women in the placebo arm during follow-up were analysed using generalised estimating equations to determine the correlates of cervico-vaginal HIV-1 RNA detection and load.Cervico-vaginal HIV-1 RNA was detected at 52.0% of 971 visits among 482 women, and was independently associated with plasma viral load, presence of genital ulcers, pregnancy, bloody cervical or vaginal discharge, abnormal vaginal discharge, cervical ectopy, Neisseria gonorrhoeae, Chlamydia trachomatis, Trichomonas vaginalis, an intermediate bacterial vaginosis score and HSV DNA detection. Similar factors were associated with genital HIV-1 RNA load.RTIs were associated with increased presence and quantity of genital HIV-1 RNA in this population. These results highlight the importance of integrating effective RTI treatment into HIV care services.

  20. Ebola Virus Shedding and Transmission: Review of Current Evidence.

    Science.gov (United States)

    Vetter, Pauline; Fischer, William A; Schibler, Manuel; Jacobs, Michael; Bausch, Daniel G; Kaiser, Laurent

    2016-10-15

     The magnitude of the 2013-2016 Ebola virus disease outbreak in West Africa was unprecedented, with >28 500 reported cases and >11 000 deaths. Understanding the key elements of Ebola virus transmission is necessary to implement adequate infection prevention and control measures to protect healthcare workers and halt transmission in the community.  We performed an extensive PubMed literature review encompassing the period from discovery of Ebola virus, in 1976, until 1 June 2016 to evaluate the evidence on modes of Ebola virus shedding and transmission.  Ebola virus has been isolated by cell culture from blood, saliva, urine, aqueous humor, semen, and breast milk from infected or convalescent patients. Ebola virus RNA has been noted in the following body fluids days or months after onset of illness: saliva (22 days), conjunctiva/tears (28 days), stool (29 days), vaginal fluid (33 days), sweat (44 days), urine (64 days), amniotic fluid (38 days), aqueous humor (101 days), cerebrospinal fluid (9 months), breast milk (16 months [preliminary data]), and semen (18 months). Nevertheless, the only documented cases of secondary transmission from recovered patients have been through sexual transmission. We did not find strong evidence supporting respiratory or fomite-associated transmission. © The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail journals.permissions@oup.com.

  1. Demand Response an Alternative Solution to Prevent Load Shedding Triggering

    Directory of Open Access Journals (Sweden)

    K. Mollah

    2014-12-01

    Full Text Available This paper investigates an alternative solution to prevent Load Shedding (LS triggering during underfrequency and proposes a new technique to restore the frequency during emergency events. Demand response (DR is considered as one of the most promising Smart Grid concepts that can be used to support the peak demand, whereas, LS is an existing last resort method during emergency grid situations. Both schemes aim to balance the load and generation in real-time and restore the frequency very quickly. This paper incorporates integrating Incentive based Demand Response (IDR with spinning reserve for smaller underfrequency events to manage the system peak demand. It also introduces a new frequency band for an Emergency Demand Response (EDR as an alternative inexpensive solution that can replace costly spinning reserves and help to prevent LS. An energy index factor is used to identify the consumption pattern of consumers to enable them to participate in IDR. An illustrative example of the performance of the proposed scheme on a modified 15 bus test system is shown. Simulation results on different scenarios confirm that the proposed method is effective to improve the frequency restoration process along with enabling participation of new services.

  2. Coxiella burnetii Shedding by Farmed Red Deer (Cervus elaphus).

    Science.gov (United States)

    González-Barrio, D; Almería, S; Caro, M R; Salinas, J; Ortiz, J A; Gortázar, C; Ruiz-Fons, F

    2015-10-01

    Wildlife and notably deer species--due to the increasing relevance of deer farming worldwide--may contribute to the maintenance of Coxiella burnetii, the causal agent of Q fever. Currently, there are no precedents linking exposure to deer species with human Q fever cases. However, a human case of Q fever was recently diagnosed in a red deer (Cervus elaphus) farm, which led us to investigate whether deer could be a source for environmental contamination with C. burnetii and ascertain the implication of C. burnetii in reproductive failure in the farm. Blood serum and vaginal swabs were collected from hinds either experiencing or not reproductive failure and tested to detect the presence of antibodies and DNA, respectively, of C. burnetii, Chlamydia abortus, Neospora caninum and Toxoplasma gondii. Serology and PCR results suggest C. burnetii was the primary cause of the reproductive failure. We identified vaginal shedding of C. burnetii in hinds, confirming red deer as a source of Q fever zoonotic infection. © 2013 Blackwell Verlag GmbH.

  3. Increased EBV Shedding in Astronaut Saliva During Spaceflight

    Science.gov (United States)

    Pierson, D. L.; Stowe, R. P.; Phillips, T.; Lugg, D. J.; Mehta, S. K.

    2003-01-01

    Shedding of Epstein-Barr virus (EBV) by astronauts before, during, and after space shuttle missions was quantified. Of 1398 saliva specimens from 32 astronauts, 314 (23%) were positive for EBV DNA by PCR analysis. Of the saliva specimens collected before flight, 29% were positive for EBV DNA and of those collected during or after flight, 16% were EBV-positive. The number of EBV DNA copies from samples taken during the flight was 417+/-31, significantly higher (P EBV DNA with a frequency of 3.7% and a copy number of 40+/-2 per ml saliva. Ten days before flight and on landing day, antibody titers to EBV viral capsid antigen (VCA) were significantly (P < 0.05) higher than baseline levels. On landing day, urinary level of cortiso1 and catecholamines, and plasma levels of substance P and other neuropeptides, were increased over their preflight value. Results suggested that stress associated with spaceflight decreases cellular immunity and thereby leads to increased viral reactivation.

  4. Cryogenic transmission electron microscopy nanostructural study of shed microparticles.

    Directory of Open Access Journals (Sweden)

    Liron Issman

    Full Text Available Microparticles (MPs are sub-micron membrane vesicles (100-1000 nm shed from normal and pathologic cells due to stimulation or apoptosis. MPs can be found in the peripheral blood circulation of healthy individuals, whereas elevated concentrations are found in pregnancy and in a variety of diseases. Also, MPs participate in physiological processes, e.g., coagulation, inflammation, and angiogenesis. Since their clinical properties are important, we have developed a new methodology based on nano-imaging that provides significant new data on MPs nanostructure, their composition and function. We are among the first to characterize by direct-imaging cryogenic transmitting electron microscopy (cryo-TEM the near-to-native nanostructure of MP systems isolated from different cell types and stimulation procedures. We found that there are no major differences between the MP systems we have studied, as most particles were spherical, with diameters from 200 to 400 nm. However, each MP population is very heterogeneous, showing diverse morphologies. We investigated by cryo-TEM the effects of standard techniques used to isolate and store MPs, and found that either high-g centrifugation of MPs for isolation purposes, or slow freezing to -80 °C for storage introduce morphological artifacts, which can influence MP nanostructure, and thus affect the efficiency of these particles as future diagnostic tools.

  5. Shedding & shaving: disclosure of proteomic expressions on a bacterial face.

    Science.gov (United States)

    Tjalsma, Harold; Lambooy, Lambert; Hermans, Peter W; Swinkels, Dorine W

    2008-04-01

    Bacterial surface proteins are critically important in determining the success of bacterial strains in their competition for survival, which makes comprehensive knowledge of the microbial 'face' of high relevance to understand bacterial physiology. Therefore, the aim of this study was to inventorize the proteomic composition of a bacterial surface by gel-free approaches using Bacillus subtilis as a model organism. To this purpose, intact bacteria were incubated with trypsin to cleave surface proteins, after which these 'shaved' proteins were identified by LC-MS/MS analysis of tryptic peptides that were released into the incubation buffer. In parallel, proteins that were released from bacterial cells without trypsin treatment were inventorized and defined as 'shed' proteins. The results showed that peptides of 41 proteins, comprising transmembrane proteins, secretory and lipoproteins, known 'anchorless' surface proteins and ribosomal proteins, were specifically released by shaving. Some of these proteins were also cleaved by trypsin-beads, which are unable to penetrate the bacterial cell wall, indicating a genuine surface-exposed localization. Together this shows that these combined gel-free approaches can reveal novel proteomic decorations on a bacterial face and may provide leads for future studies on protein sorting in B. subtilis and other Gram-positive bacteria.

  6. Thinking chickens: a review of cognition, emotion, and behavior in the domestic chicken.

    Science.gov (United States)

    Marino, Lori

    2017-03-01

    Domestic chickens are members of an order, Aves, which has been the focus of a revolution in our understanding of neuroanatomical, cognitive, and social complexity. At least some birds are now known to be on par with many mammals in terms of their level of intelligence, emotional sophistication, and social interaction. Yet, views of chickens have largely remained unrevised by this new evidence. In this paper, I examine the peer-reviewed scientific data on the leading edge of cognition, emotions, personality, and sociality in chickens, exploring such areas as self-awareness, cognitive bias, social learning and self-control, and comparing their abilities in these areas with other birds and other vertebrates, particularly mammals. My overall conclusion is that chickens are just as cognitively, emotionally and socially complex as most other birds and mammals in many areas, and that there is a need for further noninvasive comparative behavioral research with chickens as well as a re-framing of current views about their intelligence.

  7. Community-based Men's Sheds: promoting male health, wellbeing and social inclusion in an international context.

    Science.gov (United States)

    Cordier, Reinie; Wilson, Nathan J

    2014-09-01

    Males experience greater mortality and morbidity than females in most Western countries. The Australian and Irish National Male Health Policies aim to develop a framework to address this gendered health disparity. Men's Sheds have a distinct community development philosophy and are thus identified in both policies as an ideal location to address social isolation and positively impact the health and wellbeing of males who attend. The aim of this international cross-sectional survey was to gather information about Men's Sheds, the people who attend Men's Sheds, the activities at Men's Sheds, and the social and health dimensions of Men's Sheds. Results demonstrate that Men's Sheds are contributing a dual health and social role for a range of male subgroups. In particular, Men's Sheds have an outward social focus, supporting the social and mental health needs of men; health promotion and health literacy are key features of Men's Sheds. Men's Sheds have an important role to play in addressing the gendered health disparity that males face. They serve as an exemplar to health promotion professionals of a community development context where the aims of male health policy can be actualized as one part of a wider suite of global initiatives to reduce the gendered health disparity. © The Author (2013). Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  8. Effect of Different Selenium Supplementation Levels on Oxidative Stress, Cytokines, and Immunotoxicity in Chicken Thymus.

    Science.gov (United States)

    Wang, Yachao; Jiang, Li; Li, Yuanfeng; Luo, Xuegang; He, Jian

    2016-08-01

    This study assessed the effects of different selenium (Se) supplementation levels on oxidative stress, cytokines, and immunotoxicity in chicken thymus. A total of 180 laying hens (1 day old; Mianyang, China) were randomly divided into 4 groups (n = 45). The chickens were maintained either on a basic diet (control group) containing 0.2 mg/kg Se, a low-supplemented diet containing 5 mg/kg Se, a medium-supplemented diet containing 10 mg/kg Se, or a high-supplemented diet containing 15 mg/kg Se for 15, 30, and 45 days, respectively. Over the entire experimental period, serum and thymus samples were collected and used for the detection of the experimental index. The results indicated that the antioxidative enzyme activities and messenger RNA (mRNA) levels of antioxidative enzymes, IFN-γ and IL-2 in the thymus, and the content of IFN-γ and IL-2 in the serum of excessive-Se-treated chickens at all time points (except for the 5 mg/kg Se supplement group at 15 days) were significantly decreased (P supplement group at 15 and 30 days compared to the corresponding control groups. In histopathological examination, the thymus tissue from excessive-Se-treated chickens revealed different degrees of cortex drop, incrassation of the medulla, and degeneration of the reticular cells. These results suggested that the excessive Se could result in a decrease in immunity, an increase in oxidative damage, and a series of clinical pathology changes, such as cortex drop, incrassation of the medulla, and degeneration of the reticular cells.

  9. Isolation of Pasteurella multocida from broiler chickens

    Directory of Open Access Journals (Sweden)

    Sri Poernomo

    1996-06-01

    Full Text Available Pasteurella multocida, the etiological agent of fowl cholera, was isolated from five, 32 days oldbroilerchickens in the late of 1992. The chickens were from a farm located in Bogor area, raised in cages and each flock consisted of 1,550 broilers . Therewere 230 birds, aging from 28-31 days old, died with clinical signs of lameness and difficulty in breathing. Serological test of the isolate revealed serotype Aof Carter classification . To prove its virulences, the isolate was then inoculated into 3 mice subcutaneously. The mice died less then 24 hours postinoculation and P. multocida can be reisolated . The sensitivity test to antibiotics and sulfa preparations showed that the isolate was sensitive to ampicillin, doxycyclin, erythromycin, gentamycin, sulfamethoxazol-trimethoprim and baytril, but resistance to tetracyclin, kanamycin and oxytetracyclin. This is the first report of P. multocida isolation in broiler chickens in Indonesia, and it is intended to add information on bacterial diseases in poultry in Indonesia.

  10. [Psoas abscess as a chicken pox complication].

    Science.gov (United States)

    Larcamon, Jorge E; Juanco, Gabriela; Alvarez, Lionel A; Pebe, Florián V

    2010-06-01

    Chicken pox is the most frequent exantematic illness; usually its course is self-limited and benign. Several bacterial complications are described due to the disruption of the skin as a defensive barrier because of the characteristics of the injuries and the associated inmunodepression. Psoas abscess is a rare illness and it's difficult to diagnose, with a general unspecified clinical presentation. We present the case of a 5-year-old girl, on her fifth day of chicken pox, who consults about a febrile convulsion, from which she recovers without any neurological symptoms, referring to functional impotence of her inferior left limb and pain in the lumbar and gluteal zone, which irradiates to the homolateral hip, making deambulation impossible. The definitive diagnosis was made with a CAT at hospital admission. The germ isolated was community-acquired methricillin-resistant Staphilococcus aureus. Treatment consisted in surgical drainage and endovenous antibiotics.

  11. Microbial Phytase and Phosphorus Utilization by Broiler Chickens

    Directory of Open Access Journals (Sweden)

    Martin Kliment

    2012-05-01

    Full Text Available The aim of study was to investigate the mathematical and statistical assesment of the micorbial 6-phytase efficacy on phosphorus utilization at broiler chickens Cobb 500. Broiler chickens fed commercial feed mixtures based on soyabean-maize meal. Each feed mixture was fed ad libitum to chickens in boxes in commercial poultry farm. The trial consited of three groups of broiler chickens, one control group (CG and two trial groups, in which were broiler chickens fed by feed mixtures with decreased phosphorus content (TG1 and with microbial 6-phytase (TG2. A body weight of chickens at the end of the trial (42 day was 1900.0 g compared with 1883,0 g (TG1 and 1827.0 g (CG with not statistically significant differences (P≥0.05. Phosphorus, calcium and magnesium content in blood serum of broiler chickens in every group was not staticstically significant (P≥0.05. Phosphorus content in broiler chickens excreta was most higher in in control group (4.2556 g/kg in comparison with trial group (2.0911 g/kg were was microbial 6-phytase added and in trial group (3.1851 g/kg were was phosphorus content in feed mixtures decreased. In addition we concluded that microbial 6-phytase. Phytase addition into feed mixtures has not negative effect on broiler chickens growth ability and health, and helped to better utilization of phytate phosphorus from feed mixtures in relation to excreted phosphorus.

  12. Tissue-Specific Expression of the Chicken Calpain2 Gene

    Directory of Open Access Journals (Sweden)

    Zeng-Rong Zhang

    2010-01-01

    Full Text Available We quantified chicken calpain 2 (CAPN2 expression in two Chinese chicken breeds (mountainous black-bone chicken breed [MB] and a commercial meat type chicken breed [S01] to discern the tissue and ontogenic expression pattern and its effect on muscle metabolism. Real-time quantitative PCR assay was developed for accurate measurement of the CAPN2 mRNA expression in various tissues from chickens of different ages (0, 2, 4, 6, 8, 10, and 12 weeks. Results showed that the breast muscle and leg muscle tissues had the highest expression of CAPN2 compared to the other tissues from the same individual (P<.05. Overall, the CAPN2 mRNA level exhibited a “rise” developmental change in all tissues. The S01 chicken had a higher expression of the CAPN2 mRNA in all tissues than the MB chicken. Our results suggest that chicken CAPN2 expression may be related to chicken breeds and tissues.

  13. Meat-type chickens have a higher efficiency of mitochondrial oxidative phosphorylation than laying-type chickens.

    Science.gov (United States)

    Toyomizu, Masaaki; Kikusato, Motoi; Kawabata, Yusuke; Azad, Md Abul Kalam; Inui, Eriko; Amo, Taku

    2011-05-01

    Meat-type chickens show high feed efficiency and have a very rapid growth rate compared with laying-type chickens. To clarify whether the type-specific difference in feed conversion efficiency is involved in mitochondrial bioenergetics, modular kinetic analysis was applied to oxidative phosphorylation in skeletal muscle mitochondria of both type chickens. Mitochondria from skeletal muscle of meat-type chickens showed greater substrate oxidation and phosphorylating activities, and less proton leak than those of the laying-type, resulting in a higher efficiency of oxidative phosphorylation. Gene expression and protein content of uncoupling protein (avUCP) but not adenine nucleotide translocase (avANT) gene expression were lower in skeletal muscle mitochondria of meat-type chickens than the laying-type. The current results regarding a higher efficiency of oxidative phosphorylation and UCP content may partially support the high feed efficiency of meat-type chickens. Copyright © 2011 Elsevier Inc. All rights reserved.

  14. Effect of Prunus armeniaca seed extract on health, survivability, antioxidant, blood biochemical and immune status of broiler chickens at high altitude cold desert

    Directory of Open Access Journals (Sweden)

    Sahil Kalia

    2017-11-01

    Full Text Available Extreme climatic conditions and hypobaric hypoxia at high altitude hinders the growth and productivity of chickens. The present study was carried out to examine the effect of aqueous extract of Prunus armeniaca seeds on health, survivability, antioxidants, plasma biochemical parameters, and immune status of broiler chickens at high altitude. Phytochemical analysis of extract revealed the presence of high phenolics, flavonoids, and carotenoids contents. Before the in vivo study, in vitro efficacy evaluation indicated a significant protective effect of the extract in chicken peripheral blood lymphocytes. For in vivo study, experimental groups include control (fed the basal diet, and treatment T1, T2, T3, T4, T5, and T6 which received an aqueous extract of P. armeniaca in drinking water at concentrations of 100, 150, 200, 300, 400, and 800 mg/kg body weight of chicken respectively, along with basal diet for 42 days. Body weight was significantly increased in all treatment groups as compared to control group and the highest body weight was recorded in T3 group. Higher profit was gained in treatment groups due to lesser mortality in chickens. Moreover, chicken in the treatment groups had significantly higher total antioxidant capacity, free radical scavenging activity, interleukin-2, total protein, albumin, globulin level and lower malondialdehyde, interleukin-6, glucose, cholesterol, triglyceride, ALT and AST level as compared to control group. Results suggest that, P. armeniaca extract at 200 mg/kg body weight of chicken, exhibited the beneficial effect on growth performance and survivability rate of broilers and therefore, could be useful as phytogenic feed additive for broiler chickens at high altitude cold desert.

  15. Lagrangian Visualization and Real-Time Identification of the Vortex Shedding Time in the Wake of a Circular Cylinder

    Science.gov (United States)

    Rockwood, Matthew P.

    The flow around a circular cylinder, a canonical bluff body, has been extensively studied in the literature to determine the mechanisms that cause the formation of vortices in the cylinder wake. Understanding of these mechanisms has led to myriad attempts to control the vortices either to mitigate the oscillating forces they cause, or to augment them in order to enhance mixing in the near-wake. While these flow control techniques have been effective at low Reynolds numbers, they generally lose effectiveness or require excessive power at Reynolds numbers commonly experienced in practical applications. For this reason, new methods for identifying the locations of vortices and their shedding time could increase the effectiveness of the control techniques. In the current work, two-dimensional, two-component velocity data was collected in the wake of a circular cylinder using a planar digital particle image velocimetry (DPIV) measurement system at Reynolds numbers of 9,000 and 19,000. This experimental data, as well as two-dimensional simulation data at a Reynolds number of 150, and three-dimensional simulation data at a Reynolds number of 400, is used to calculate the finite-time Lyapunov exponent (FTLE) field. The locations of Lagrangian saddles, identified as non-parallel intersections of positive and negative time FTLE ridges, are shown to indicate the timing of von Karman vortex shedding in the wake of a circular cylinder. The Lagrangian saddle found upstream of a forming and subsequently shedding vortex is shown to clearly accelerate away from the cylinder surface as the vortex begins to shed. This provides a novel, objective method to determine the timing of vortex shedding. The saddles are impossible to track in real-time, however, since future flow field data is needed for the computation of the FTLE fields. In order to detect the Lagrangian saddle acceleration without direct access to the FTLE, the saddle dynamics are connected to measurable surface quantities

  16. Organsweight and performance characteristics of broiler chickens ...

    African Journals Online (AJOL)

    Key Words: Broiler chickens, burning, flames and fumes, organ weights and performance, simulated crude petroleum. La performance des poulets de chair exposé aux flammes et aux fumées de la combustion du pétrole brut à des distances variables au cours d'une période quotidienne de 16 heures a été évaluée pendant ...

  17. First week nutrition for broiler chickens

    OpenAIRE

    Lamot, David

    2017-01-01

    During the first week of life, broiler chickens undergo various developmental changes that are already initiated during incubation. Ongoing development of organs such as the gastro- intestinal tract and the immune system may affect the nutritional requirements during this age period. Despite the residual yolk that is available at hatch and that may provide nutritional support during the first days after hatch, the growth performance may be affected by the time in between hatch and first feed ...

  18. Taxonomy Icon Data: chicken [Taxonomy Icon

    Lifescience Database Archive (English)

    Full Text Available chicken Gallus gallus Chordata/Vertebrata/Aves Gallus_gallus_L.png Gallus_gallus_NL.png Gallus..._gallus_S.png Gallus_gallus_NS.png http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Gallus+gallus...&t=L http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Gallus+gallus&t=NL http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Gallus...+gallus&t=S http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Gallus+gallus&t=NS ...

  19. Detection of Salmonella typhimurium in retail chicken meat and chicken giblets.

    Science.gov (United States)

    El-Aziz, Doaa M Abd

    2013-09-01

    To detect Salmonella typhimurium (S. typhimurium), one of the most frequently isolated serovars from food borne outbreaks throughout the world, in retail raw chicken meat and giblets. One hundred samples of retail raw chicken meat and giblets (Liver, heart and gizzard) which were collected from Assiut city markets for detection of the organism and by using Duplex PCR amplification of DNA using rfbJ and fliC genes. S. typhimurium was detected at rate of 44%, 40% and 48% in chicken meat, liver and heart, respectively, but not detected in gizzard. The results showed high incidence of S. typhimurium in the examined samples and greater emphasis should be applied on prevention and control of contamination during processing for reducing food-borne risks to consumers.

  20. Effects of Different Levels of Full Fat Safflower Seed on Performance of 21-42 Days Old Broiler Chickens

    Directory of Open Access Journals (Sweden)

    M Malekian

    2011-12-01

    Full Text Available This study was conducted to evaluate the effects of different dietary levels of full fat safflower seed (0, 5, 10, 15 and 20% of diet on performance, carcass characteristics and selected blood metabolites of broiler chickens from Arbor Acres Plus strain. The experiment was designed with 350 commercial one-day-old male broiler chickens using completely randomized design with 5 dietary treatments and 5 replications. Prior to the study, a commercial starter diet was fed to broiler chickens for 3 weeks. On day 21 of age 14 birds were allocated to each experimental unit (1.5×1.5 m floor pen. Experimental diets for the five treatments were prepared to be iso-caloric and iso-nitrogenous. Broiler chickens were provided with feed and water ad libitum. Data on weight gain, feed consumption and feed efficiency were recorded weekly basis. At the end of the experiment (42 days of age one bird from each replication was selected randomly, blood sample was collected and the birds were slaughtered to determine carcass parameters. Inclusion of full fat safflower seed in experimental diets, did not significantly affect weight gain, feed consumption and feed efficiency. Breast yield, thighs, empty gastrointestinal tract, liver, gizzard and abdominal fat pad percentages to live weight were not affected by dietary treatments. Serum triglyceride was numerically decreased as the full fat safflower seed was increased in the diets. 20% full fat safflower seed diet significantly decreased total serum cholesterol in compare to control group but other levels had no significant difference with control group. In conclusion, feeding different levels of full fat safflower seed did not show any negative effect on performance, carcass characteristics and blood metabolites of broiler chickens.

  1. Transmission of Campylobacter coli in chicken embryos

    Directory of Open Access Journals (Sweden)

    Daise Aparecida Rossi

    2012-06-01

    Full Text Available Campylobacter coli is an important species involved in human cases of enteritis, and chickens are carriers of the pathogen mainly in developing country. The current study aimed to evaluate the transmission of C. coli and its pathogenic effects in chicken embryos. Breeder hens were inoculated intra-esophageally with C. coli isolated from chickens, and their eggs and embryos were analyzed for the presence of bacteria using real-time PCR and plate culture. The viability of embryos was verified. In parallel, SPF eggs were inoculated with C. coli in the air sac; after incubation, the embryos were submitted to the same analysis as the embryos from breeder hens. In embryos and fertile eggs from breeder hens, the bacterium was only identified by molecular methods; in the SPF eggs, however, the bacterium was detected by both techniques. The results showed no relationship between embryo mortality and positivity for C. coli in the embryos from breeder hens. However, the presence of bacteria is a cause of precocious mortality for SPF embryos. This study revealed that although the vertical transmission is a possible event, the bacteria can not grow in embryonic field samples.

  2. Chicken domestication: from archeology to genomics.

    Science.gov (United States)

    Tixier-Boichard, Michèle; Bed'hom, Bertrand; Rognon, Xavier

    2011-03-01

    Current knowledge on chicken domestication is reviewed on the basis of archaeological, historical and molecular data. Several domestication centres have been identified in South and South-East Asia. Gallus gallus is the major ancestor species, but Gallus sonneratii has also contributed to the genetic make-up of the domestic chicken. Genetic diversity is now distributed among traditional populations, standardized breeds and highly selected lines. Knowing the genome sequence has accelerated the identification of causal mutations determining major morphological differences between wild Gallus and domestic breeds. Comparative genome resequencing between Gallus and domestic chickens has identified 21 selective sweeps, one involving a non-synonymous mutation in the TSHR gene, which functional consequences remain to be explored. The resequencing approach could also identify candidate genes responsible of quantitative traits loci (QTL) effects in selected lines. Genomics is opening new ways to understand major switches that took place during domestication and subsequent selection. Copyright © 2011 Académie des sciences. Published by Elsevier SAS. All rights reserved.

  3. Optical diffusion property of chicken tissue

    Science.gov (United States)

    Schneider, Patricia S.; Flamholz, Alex; Wong, Peter K.; Lieberman, David H.; Cheung, Tak D.; Itoka, Harriet; Minott, Troy; Quizhpi, Janie; Rodriguez, Jacquelin

    2004-11-01

    Chicken tissue acts as a turbid medium in optical wavelength. Optical characterization data of fresh chicken dark and white meat were studied using the theory of light diffusion. The gaussian-like transmission profile was used to determine the transport mean free path and absorption. The refractive index, a fundamental parameter, was extracted via transmission correlation function analysis without using index-matching fluid. The variation in refractive index also produced various small shifts in the oscillatory feature of the intensity spatial correlation function at distance shorter than the transport mean free path. The optical system was calibrated with porous silicate slabs containing different water contents and also with a solid alumina slab. The result suggested that the selective scattering/absorption of myoglobin and mitochondria in the dark tissues is consistent with the transmission data. The refractive index was similar for dark and white tissues at the He-Ne wavelength and suggested that the index could serve as a marker for quality control. Application to chicken lunchmeat samples revealed that higher protein and lower carbohydrate would shift the correlation toward smaller distance. The pure fat refractive index was different from that of the meat tissue. Application of refractive index as a fat marker is also discussed

  4. Bacteriological profile of raw, frozen chicken nuggets.

    Science.gov (United States)

    Eglezos, Sofroni; Dykes, Gary A; Huang, Bixing; Fegan, Narelle; Stuttard, Ed

    2008-03-01

    The bacteriological profile of raw, frozen chicken nuggets manufactured at a chicken processing facility in Queensland, Australia, was determined. Chicken nuggets are manufactured by grinding poultry, adding premixes to incorporate spices, forming the meat to the desired size and shape, applying a batter and breading, freezing, and packaging. A total of 300 frozen batches were analyzed for aerobic plate count, Escherichia coli, and Salmonella over a period of 4 years. The mean of the aerobic plate count was 5.4 log CFU/g, and counts at the 90th, 95th, and 99th percentiles were 5.7, 5.9, and 6.5 log CFU/g, respectively. The maximum number of bacteria detected was 6.6 log CFU/g. E. coli prevalence was 47%, and of the positive samples, the mean was 1.9 log CFU/g; counts at the 90th, 95th, and 99th percentiles were 2.3, 2.4, and 2.8 log CFU/g, respectively. The maximum number of E. coli was 2.9 log CFU/g. The Salmonella prevalence was 8.7%, and 57.7% of these isolates were typed as Salmonella subspecies II 4,12,[27]:b:[e,n,x] (Sofia), a low-virulence serotype well adapted to Australian poultry flocks. There was a significant relationship (P nuggets.

  5. Oxidative stability of chicken meat after propolis extract application in their diets

    Directory of Open Access Journals (Sweden)

    Marek Bobko

    2015-05-01

    Full Text Available In the experiment, the effect of the addition of propolis extract in a feed mixture for chicken broilers Hubbard JV on oxidative stability of breast and thigh muscles during refrigerated storage was investigated. In the experiment were included 90 pieces of one day-old chicks, which were divided into 3 groups (control, E1 and E2. Chickens were fed by ad libitum system until the age of 42 days. These feed mixtures were made without antibiotics preparation and coccidiostats.  Propolis extract in an amount of 150 mg.kg-1 (E1 and 450 mg.kg-1 (E2 was added into feed mixtures for experimental groups. During whole period of refrigerated storage were higher values of MDA determined in control group compare to experimental groups. The higher average MDA value determined in breast muscels of broiler chicken hybrid combination Hubbard JV was in samples of control group (0.157 mg.kg-1 compared to experimental groups E1 (0.140 mg.kg-1 and E2 (0.130 mg.kg-1 after 6-month of refrigerated storage. Significantly higher values of MDA were determined in control group compare to second experimental group from fourth month to the end of storage. The significantly lower value of MDA was determinated in first experimental group compare to control only at 6 month of storage. Trend of thigh muscle oxidation stability of chicken hybrid combination Hubbard JV was during 6 months of refrigerated storage similar than in breast muscle. The higher average MDA value determined in thigh muscels was in samples of control group (0.170 mg.kg-1 compared to experimental groups E1 (0.150 mg.kg-1 and E2 (0.139 mg.kg-1 after 6-month of refrigerated storage. Significantly higher values of MDA were determined in control group compare to second experimental group from fourth month to the end of storage. Higher amount of MDA in thigh muscle compare to breast muscle is due to by higher amount of fat occurred in thigh muscle. Normal 0 21 false false false SK X-NONE X-NONE

  6. OXIDATIVE STABILITY OF CHICKEN MEAT AFTER APPLICATION PHYTOGENIC ADDITIVES IN THEIR DIET

    Directory of Open Access Journals (Sweden)

    Marek Bobko

    2015-02-01

    Full Text Available The aim of the study was to evaluate the oxidative stability (TBARS method of breast and thigh muscle after application of feed mixtures enriched by phytogenic additives. The experiment started with 250 pieces one-day-old chicks of Cobb 500 hybrid combination. They were divided into one control (C and four experimental groups (1st EG, 2nd EG, 3rd EG, 4th EG. Each group included 50 chicks. In experimental groups, feed additives were applied as followed: 100 mg kg-1 Agolin Poultry (in the 1st EG, 500 mg kg-1 Agolin Tannin Plus (in the 2nd EG, 1000 mg kg-1 Biostrong 510 + FortiBac (in the 3rd EG and 1000 mg kg-1 Agolin Acid (in the 4th EG. We recorded positive influence on chicken meat oxidative stability in all experimental groups with application of plant feed additives. Experimental broiler chickens were fed during 42 days by ad libitum. Chicken meat samples of breast and thigh muscle were analyzed in the 1st, 3rd, 5th and 7th day of storage in cold conditions at 4 °C. Obtained results showed that applied phytogenic additives had positive influence on oxidative stability of breast and thigh muscles. At the end of cold store (in 7th day, we found higher malondialdehyde (MDA values and lower oxidative stability (P<0.05 of breast muscle in control group (0.157 mg kg-1 compared to experimental groups (from 0.124 mg kg-1 in the 3rd EG to 0.133 mg kg-1 in the 1st EG. In the thigh muscle, we found similar tendency of oxidative changes as in the breast muscle. At the end of cold store (in the 7th day, MDA average values of thigh muscle were higher (P<0.05 in control group (0.179 mg kg-1 compared to experimental groups (from 0.136 mg kg-1 in the 4th EG to 0.141 mg kg-1 in the 1st EG. Significant differences (P<0.05 between the control and experimental groups were found from the 5th day of storage in thigh muscle in contrast to breast muscle. Obtained results indicate positive influence of phytogenic additives applied in chicken nutrition, namely on

  7. Replication and shedding kinetics of infectious hematopoietic necrosis virus in juvenile rainbow trout

    Science.gov (United States)

    Wargo, Andrew R.; Scott, Robert J.; Kerr, Benjamin; Kurath, Gael

    2017-01-01

    Viral replication and shedding are key components of transmission and fitness, the kinetics of which are heavily dependent on virus, host, and environmental factors. To date, no studies have quantified the shedding kinetics of infectious hematopoietic necrosis virus (IHNV) in rainbow trout (Oncorhynchus mykiss), or how they are associated with replication, making it difficult to ascertain the transmission dynamics of this pathogen of high agricultural and conservation importance. Here, the replication and shedding kinetics of two M genogroup IHNV genotypes were examined in their naturally co-evolved rainbow trout host. Within host virus replication began rapidly, approaching maximum values by day 3 post-infection, after which viral load was maintained or gradually dropped through day 7. Host innate immune response measured as stimulation of Mx-1 gene expression generally followed within host viral loads. Shedding also began very quickly and peaked within 2 days, defining a generally uniform early peak period of shedding from 1 to 4 days after exposure to virus. This was followed by a post-peak period where shedding declined, such that the majority of fish were no longer shedding by day 12 post-infection. Despite similar kinetics, the average shedding rate over the course of infection was significantly lower in mixed compared to single genotype infections, suggesting a competition effect, however, this did not significantly impact the total amount of virus shed. The data also indicated that the duration of shedding, rather than peak amount of virus shed, was correlated with fish mortality. Generally, the majority of virus produced during infection appeared to be shed into the environment rather than maintained in the host, although there was more retention of within host virus during the post-peak period. Viral virulence was correlated with shedding, such that the more virulent of the two genotypes shed more total virus. This fundamental understanding of IHNV

  8. Acceleration of epithelial cell syndecan-1 shedding by anthrax hemolytic virulence factors

    Directory of Open Access Journals (Sweden)

    Chandhoke Vikas

    2006-02-01

    Full Text Available Abstract Background It has been recently reported that major pathogens Staphylococcus aureus and Pseudomonas aeruginosa accelerate a normal process of cell surface syndecan-1 (Synd1 ectodomain shedding as a mechanism of host damage due to the production of shedding-inducing virulence factors. We tested if acceleration of Synd1 shedding takes place in vitro upon treatment of epithelial cells with B. anthracis hemolysins, as well as in vivo during anthrax infection in mice. Results The isolated anthrax hemolytic proteins AnlB (sphingomyelinase and AnlO (cholesterol-binding pore-forming factor, as well as ClnA (B. cereus homolog of B. anthracis phosphatidyl choline-preferring phospholipase C cause accelerated shedding of Synd1 and E-cadherin from epithelial cells and compromise epithelial barrier integrity within a few hours. In comparison with hemolysins in a similar range of concentrations, anthrax lethal toxin (LT also accelerates shedding albeit at slower rate. Individual components of LT, lethal factor and protective antigen are inactive with regard to shedding. Inhibition experiments favor a hypothesis that activities of tested bacterial shedding inducers converge on the stimulation of cytoplasmic tyrosine kinases of the Syk family, ultimately leading to activation of cellular sheddase. Both LT and AnlO modulate ERK1/2 and p38 MAPK signaling pathways, while JNK pathway seems to be irrelevant to accelerated shedding. Accelerated shedding of Synd1 also takes place in DBA/2 mice challenged with Bacillus anthracis (Sterne spores. Elevated levels of shed ectodomain are readily detectable in circulation after 24 h. Conclusion The concerted acceleration of shedding by several virulence factors could represent a new pathogenic mechanism contributing to disruption of epithelial or endothelial integrity, hemorrhage, edema and abnormal cell signaling during anthrax infection.

  9. Systemic Immune Activation and HIV Shedding in the Female Genital Tract.

    Science.gov (United States)

    Spencer, LaShonda Y; Christiansen, Shawna; Wang, Chia-Hao H; Mack, Wendy J; Young, Mary; Strickler, Howard D; Anastos, Kathryn; Minkoff, Howard; Cohen, Mardge; Geenblatt, Ruth M; Karim, Roksana; Operskalski, Eva; Frederick, Toni; Homans, James D; Landay, Alan; Kovacs, Andrea

    2016-02-01

    Plasma HIV RNA is the most significant determinant of cervical HIV shedding. However, shedding is also associated with sexually transmitted infections (STIs) and cervical inflammation. The mechanism by which this occurs is poorly understood. There is evidence that systemic immune activation promotes viral entry, replication, and HIV disease progression. We hypothesized that systemic immune activation would be associated with an increase in HIV genital shedding. Clinical assessments, HIV RNA in plasma and genital secretions, and markers of immune activation (CD38(+)DR(+) and CD38(-)DR(-)) on CD4(+) and CD8(+) T cells in blood were evaluated in 226 HIV+ women enrolled in the Women's Interagency HIV Study. There were 569 genital evaluations of which 159 (28%) exhibited HIV RNA shedding, defined as HIV viral load >80 copies per milliliter. We tested associations between immune activation and shedding using generalized estimating equations with logit link function. In the univariate model, higher levels of CD4(+) and CD8(+) T-cell activation in blood were significantly associated with genital tract shedding. However, in the multivariate model adjusting for plasma HIV RNA, STIs, and genital tract infections, only higher levels of resting CD8(+) T cells (CD38(-)DR(-)) were significantly inversely associated with HIV shedding in the genital tract (odds ratios = 0.44, 95% confidence interval: 0.21 to 0.9, P = 0.02). The association of systemic immune activation with genital HIV shedding is multifactorial. Systemic T-cell activation is associated with genital tract shedding in univariate analysis but not when adjusting for plasma HIV RNA, STIs, and genital tract infections. In addition, women with high percentage of resting T cells are less likely to have HIV shedding compared with those with lower percentages. These findings suggest that a higher percentage of resting cells, as a result of maximal viral suppression with treatment, may decrease local genital activation, HIV

  10. The toxicology of ion-shedding zinc oxide nanoparticles.

    Science.gov (United States)

    Liu, Jia; Feng, Xiaoli; Wei, Limin; Chen, Liangjiao; Song, Bin; Shao, Longquan

    2016-01-01

    Zinc oxide nanoparticles (ZnO NPs) are nanomaterials that are widely used in many fields. ZnO NPs are ion-shedding particles, and zinc ions produce important and potent effects that differ from those of other metal or metal oxide NPs. Several studies have reported the toxicological effects of ZnO NPs administered via several different routes, including orally, dermally, by pulmonary absorption, intraperitoneally, and intravenously. Some potential routes for human exposure have produced various toxic effects in animal models. Moreover, several in vitro studies using a range of cell lines have reported the mechanisms underlying ZnO NP toxicity. Zinc ions play a very important role in ZnO NP toxicity, although the effects of the particulate form cannot be excluded. A crucial determinant of toxicity is the solubility of ZnO NPs, which is influenced by various factors, including the pH of the environment in tissues, cells, and organelles. In addition to the inflammatory responses and oxidative stress known to be induced by ZnO NPs, these NPs also exhibit some positive anti-inflammatory, anti-diabetic, and pro-coagulant effects at sub-toxic doses; these effects are probably induced by zinc ions, which are an essential element in cell homeostasis. It is highly likely that there are additional distinct mechanisms at sub-toxic doses and concentrations, which may be concealed or altered by the toxic effects observed at higher levels of ZnO NPs. Furthermore, many signaling pathway molecules associated with necrosis and apoptosis can be activated, leading to cell death. This review presents the status of ZnO NP toxicology and highlights areas requiring further investigation.

  11. A study on the frictional response of reptilian shed skin

    Energy Technology Data Exchange (ETDEWEB)

    Abdel-Aal, H A [Arts et Metier ParisTech, Rue Saint Dominique BP 508, 51006 Chalons-en-Champagne (France); Vargiolu, R; Zahouani, H [Laboratoire de Tribology et Dynamique des Systemes, UMR CNRS 5513, ENI Saint Etienne - Ecole Centrale de Lyon -36 Avenue Guy de Collongue, 69131 Ecully cedex. France (France); Mansori, M El, E-mail: Hisham.abdel-aal@ensam.eu [Ecole Nationale Superieure d' Arts et Metiers, 2, cours des Arts et Metiers - 13617 Aix en Provence cedex 1 (France)

    2011-08-19

    Deterministic surfaces are constructs of which profile, topography and textures are integral to the function of the system they enclose. They are designed to yield a predetermined tribological response. Developing such entities relies on controlling the structure of the rubbing interface so that, not only the surface is of optimized topography, but also is able to self-adjust its tribological behaviour according to the evolution of sliding conditions. In seeking inspirations for such designs, many engineers are turning toward the biological world to study the construction and behaviour of bio-analogues, and to probe the role surface topography assumes in conditioning of frictional response. That is how a bio-analogue can self-adjust its tribological response to adapt to habitat constraints. From a tribological point of view, Squamate Reptiles, offer diverse examples where surface texturing, submicron and nano-scale features, achieves frictional regulation. In this paper, we study the frictional response of shed skin obtained from a snake (Python regius). The study employed a specially designed tribo-acoustic probe capable of measuring the coefficient of friction and detecting the acoustical behavior of the skin in vivo. The results confirm the anisotropy of the frictional response of snakes. The coefficient of friction depends on the direction of sliding: the value in forward motion is lower than that in the backward direction. Diagonal and side winding motion induces a different value of the friction coefficient. We discuss the origin of such a phenomenon in relation to surface texturing and study the energy constraints, implied by anisotropic friction, on the motion of the reptile.

  12. Osteocyte lacunae features in different chicken bones

    Directory of Open Access Journals (Sweden)

    Domenis L., Squadrone S., Marchis D., Abete MC.

    2009-01-01

    Full Text Available Directive 2003/126/EC defines the method for the determination of constituents of animal origin for official control of feedingstuffs. One of the hardest problems for microscopist is the differentiation between mammalian and poultry bones on the basis of some characteristics as colour and borders of the fragments, shape and density of osteocyte lacunae. The shape of osteocyte lacuna in poultry and mammals is often described in different way, elliptic or roundish according with the Author(s. The aim of this study was to analyze the characteristics of lacunae in chicken bones of different type. For this purpose, smashed fragments and histological sections of the same bone were compared in order to evaluate the microscopic aspect of lacunae in different breaking and trimming planes. According to the observations carried out, it was possible to infer that chicken osteocyte has a biconvex lens shape; however the different arrangement and some size variation of the osteocytes in the several bone segments influence the microscopic features of corresponding lacunae. Chicken bone is made of a parallel-fibered tissue, without osteons. This structure probably determines the plane fracture of the bone and consequently the different aspect of lacunae (from spindle-shaped to elliptic-roundish we can see in chicken derived PAP (processed animal protein. For example, in the fragments obtained from smashed diaphysis, the prevalence of spindle-shaped lacunae is depending on the preferential breaking of the bone along longitudinal plane. Likewise, for the epiphysis, being made mostly by bone trabeculae with strange directions, the breaking happens along different planes, creating lacunae of various shape. Performing the official check of animal feedingstuffs, the presence of bone fragments with roundish or elliptic osteocyte lacunae induces the analyst to thinking that the meat and bone meal comes respectively from mammals and poultry or vice versa depending to

  13. The Use of Sheds for Thermal Management of the Permafrost Bases

    Directory of Open Access Journals (Sweden)

    Passek Vadim

    2016-01-01

    Full Text Available The article analyzes the use of various types of sheds as an effective measure for thermal management of the permafrost soils. It also analyzes the possible structural designs of sheds for railway and highway roadbed and the effectiveness of their thermal influence on frozen conditions.

  14. The Use of Sheds for Thermal Management of the Permafrost Bases

    OpenAIRE

    Passek Vadim; Tsernant Aleksandr

    2016-01-01

    The article analyzes the use of various types of sheds as an effective measure for thermal management of the permafrost soils. It also analyzes the possible structural designs of sheds for railway and highway roadbed and the effectiveness of their thermal influence on frozen conditions.

  15. Strongyle egg shedding consistency in horses on farms using selective therapy in Denmark

    DEFF Research Database (Denmark)

    Nielsen, Martin Krarup; Haaning, Niels; Olsen, Susanne Nautrup

    2006-01-01

    Knowledge of horses that shed the same number of strongyle eggs over time can lead to the optimization of parasite control strategies. This study evaluated shedding of strongyle eggs in 424 horses on 10 farms whan a selective anthelmintic treatment regime was used over a 3-year period....

  16. Low dose acetylsalicylic acid and shedding of microparticles in vivo in humans.

    Science.gov (United States)

    Lubsczyk, Barbara; Kollars, Marietta; Hron, Gregor; Kyrle, Paul A; Weltermann, Ansgar; Gartner, Verena

    2010-06-01

    Microparticles (MPs) have procoagulant properties as shown in vitro and in animal models. Their role in haemostatic system activation at the site of a vascular injury in vivo in humans has not been studied. In a prospective randomized crossover study, 13 healthy volunteers were given 100 mg acetylsalicylic acid or placebo daily for 7 days. Number and cellular origin, expression of tissue factor (TF) and phosphatidylserine on MPs, and platelet and coagulation activation markers [beta-thromboglobulin (beta-TG), prothrombin fragment f1.2 (f1.2)] were measured in venous blood and in blood from a vascular injury (shed blood) by flow cytometry and immunoassays, respectively. The number of MPs was significantly higher in shed blood than in venous blood. The majority of MPs were platelet derived. The expression of TF on MPs was low, but higher in shed blood than in venous blood. TF positive MPs were significantly higher in shed blood, which was due to an increase of MPs from platelets (PMPs). In shed blood, the number of TF expressing platelet-derived MPs correlated with beta-TG, but not with f1.2. Low dose acetylsalicylic acid did not affect shedding of PMPs, neither in venous blood nor in shed blood. The release of PMPs locally at the site of platelet plug formation in humans indicates a possible role of MPs for haemostatic system activation in vivo. Low dose acetylsalicylic acid might not be strong enough to suppress shedding of PMPs in the microcirculation.

  17. Control of a coupled map lattice model for vortex shedding in the ...

    Indian Academy of Sciences (India)

    vortex shedding, can be sensed in an experiment through standard hot-film velocity mea- surement .... In this section, we discuss certain features in the development of three coupled map lattice models where ..... vortex shedding behind circular cylinders, in ASME forum on unsteady flow separation, FED. 52, 1 (1987).

  18. Genetic relationship between wool shedding in ewe-lambs and ewes

    Science.gov (United States)

    Interest in reducing labor costs related to shearing has led to the development of breeds that naturally shed their wool annually. This goal has been achieved by introducing hair-sheep genetics. These developments are relatively recent and thus the genetic underpinnings of wool shedding (WS) are not...

  19. Prolonged Shedding of Human Coronavirus in Hematopoietic Cell Transplant Recipients: Risk Factors and Viral Genome Evolution.

    Science.gov (United States)

    Ogimi, Chikara; Greninger, Alexander L; Waghmare, Alpana A; Kuypers, Jane M; Shean, Ryan C; Xie, Hu; Leisenring, Wendy M; Stevens-Ayers, Terry L; Jerome, Keith R; Englund, Janet A; Boeckh, Michael

    2017-07-15

    Recent data suggest that human coronavirus (HCoV) pneumonia is associated with significant mortality in hematopoietic cell transplant (HCT) recipients. Investigation of risk factors for prolonged shedding and intrahost genome evolution may provide critical information for development of novel therapeutics. We retrospectively reviewed HCT recipients with HCoV detected in nasal samples by polymerase chain reaction (PCR). HCoV strains were identified using strain-specific PCR. Shedding duration was defined as time between first positive and first negative sample. Logistic regression analyses were performed to evaluate factors for prolonged shedding (≥21 days). Metagenomic next-generation sequencing (mNGS) was conducted when ≥4 samples with cycle threshold values of <28 were available. Seventeen of 44 patients had prolonged shedding. Among 31 available samples, 35% were OC43, 32% were NL63, 19% were HKU1, and 13% were 229E; median shedding duration was similar between strains (P = .79). Bivariable logistic regression analyses suggested that high viral load, receipt of high-dose steroids, and myeloablative conditioning were associated with prolonged shedding. mNGS among 5 subjects showed single-nucleotide polymorphisms from OC43 and NL63 starting 1 month following onset of shedding. High viral load, high-dose steroids, and myeloablative conditioning were associated with prolonged shedding of HCoV in HCT recipients. Genome changes were consistent with the expected molecular clock of HCoV.

  20. Chickens Are a Lot Smarter than I Originally Thought”: Changes in Student Attitudes to Chickens Following a Chicken Training Class

    Directory of Open Access Journals (Sweden)

    Susan J. Hazel

    2015-08-01

    Full Text Available A practical class using clicker training of chickens to apply knowledge of how animals learn and practice skills in animal training was added to an undergraduate course. Since attitudes to animals are related to their perceived intelligence, surveys of student attitudes were completed pre- and post- the practical class, to determine if (1 the practical class changed students’ attitudes to chickens and their ability to experience affective states, and (2 any changes were related to previous contact with chickens, training experience or gender. In the post- versus pre-surveys, students agreed more that chickens are easy to teach tricks to, are intelligent, and have individual personalities and disagreed more that they are difficult to train and are slow learners. Following the class, they were more likely to believe chickens experience boredom, frustration and happiness. Females rated the intelligence and ability to experience affective states in chickens more highly than males, although there were shifts in attitude in both genders. This study demonstrated shifts in attitudes following a practical class teaching clicker training in chickens. Similar practical classes may provide an effective method of teaching animal training skills and promoting more positive attitudes to animals.

  1. A hybrid method for optimal load shedding and improving voltage stability

    Directory of Open Access Journals (Sweden)

    V. Tamilselvan

    2016-03-01

    Full Text Available In this paper, a hybrid method is proposed for reducing the amount of load shedding and voltage collapse. The hybrid method is the combination of Genetic Algorithm (GA and Neural Network (NN. The GA is used by two stages, one is to frame the optimization model and other stage is to generate data set for developing the NN based intelligent load shedding model. The appropriate buses for load shedding are selected based on the sensitivity of minimum eigenvalue of load flow Jacobian with respect to the load shed. The proposed method is implemented in MATLAB working platform and the performance is tested with 6 bus and IEEE 14 bus bench mark system. The result of the proposed hybrid method is compared with the GA based optimization algorithm. The comparison shows that, the proposed method ensures voltage stability with minimum loading shedding.

  2. HPV seminal shedding among men seeking fertility evaluation in Abidjan, Ivory Coast.

    Science.gov (United States)

    Didelot-Rousseau, Marie-Noelle; Diafouka, François; Yayo, Eric; Kouadio, Luc-Philippe; Monnet, Dagui; Segondy, Michel

    2007-06-01

    Little is known about the semen shedding of human papillomaviruses (HPV) in African men. To detect and identify HPV types in semen samples from men seeking fertility evaluation in Abidjan, Ivory Cost. Sixty-three semen samples were tested by PCR using consensus primers and HPV types were determined by PCR product sequencing or by line probe assay (LiPA) when sequencing was inconclusive. A total of 19 HPV isolates belonging to 11 HPV types were identified in semen samples from 18 (28.6%) men. Ten (55.5%) of the HPV-positive men shed oncogenic HPV types. An association of borderline significance (P=0.06) was observed between HPV semen shedding and a lower sperm count. HPV shedding in semen is common in African men. The relationship between HPV semen shedding and sperm quality merits to be further investigated.

  3. The risk of salmonellae shedding by dogs fed Salmonella-contaminated commercial raw food diets.

    Science.gov (United States)

    Finley, Rita; Ribble, Carl; Aramini, Jeff; Vandermeer, Meredith; Popa, Maria; Litman, Marcus; Reid-Smith, Richard

    2007-01-01

    Twenty-eight research dogs were enrolled to determine the prevalence of salmonellae shedding after consumption of 1 Salmonella-contaminated commercial raw food diet meal. Sixteen dogs were exposed to Salmonella-contaminated commercial raw food diets and 12 to Salmonella-free commercial raw food diets. Seven of the exposed dogs shed salmonellae 1-7 days after consumption of Salmonella-contaminated raw food diets. None of the dogs fed Salmonella-free diets shed salmonellae. No clinical signs were observed in either group. Five of the 7 dogs shed the same serotypes as those recovered from food samples used for feeding. Results showed the same serotypes and antimicrobial resistance pattern in 2 of the 7 shedders. Dogs fed Salmonella-contaminated raw food diets can shed salmonellae and may, therefore, be a source of environmental contamination potentially leading to human or animal illness.

  4. Effects of the ELF-MFs on the development of spleens of preincubated chicken embryos.

    Science.gov (United States)

    Lahijani, Maryam Shams; Tehrani, Daryush Minaei; Varzideh, Fahimeh

    2013-09-01

    Effects of extremely low-frequency magnetic fields (ELF-MFs) on the histopathology, histomorphometry, ultrastructural changes (transmission electron microscope, TEM), apoptosis and alkaline phosphatase (ALP) activities in the spleens of preincubated white leghorn chicken embryo were investigated. Ninety fertilized eggs were divided into six groups as control (n = 15), sham (n = 15) and four experimental groups (1-4, n = 15). Eggs of experimental groups were exposed to 1.33, 2.66, 5.52 and 7.32 mTs flux intensities established in our previous published experiments and the last intensity was used for studying apoptosis and ultrastructures (TEM) of the spleens of 19-day-old chicken embryos. Eggs of control groups remained intact. Sham groups were placed inside the coil for 24 h before incubation with no exposures, then they were incubated in the same incubator (37°C, 60% humidity) for 19 days. Spleens of chicken embryos were removed, fixed in formalin (10%), and stained with H&E for histopathological and histomorphometrical surveys; TUNEL assay indicated possible change in apoptosis and TEM and biochemical studies were also carried out. Significant decreases in the sizes of the spleens of embryos of experimental groups, hyperemia, damages in spleen parenchyma, decreases in the numbers of splenic nodules, increases in the number of polymorphonuclear cells and sinusoidal spaces of spleens, significant increase in the level of ALP activities, significant increases in the numbers of apoptotic cells, deformed nuclei and swollen mitochondria were observed in experimental groups comparing with those in control and sham groups. ELF-MF created changes which could impair the immune functions.

  5. Analytical simulation of the far-field jet noise and the unsteady jet flow-field by a model of periodic shedding of vortex ring from the jet exit

    Science.gov (United States)

    Liu, C. H.

    1975-01-01

    The construction of a theoretical flow field due to shedding of vortex rings, the identification of the controlling parameters, and the determination of whether the theoretical model successfully simulated the unsteady pressure field near jet (and consequently the far field noise) was studied. The basic parameters contained in the analytic solutions were the epoch at which a vortex ring was shed near the jet exit and the eddy viscosity coefficient. These parameters were identified from the experimental data for the real-time pressure and from the spread of the mixing layer of the jet. Results of the theoretical analysis show good qualitative agreement with the experimental data.

  6. Men's Sheds: enabling environments for Australian men living with and without long-term disabilities.

    Science.gov (United States)

    Hansji, Neeraj L; Wilson, Nathan J; Cordier, Reinie

    2015-05-01

    The health of Australian men has recently received greater attention. Men's Sheds are named in national policy as an exemplar community-based organisation for the betterment of men's psychosocial health; yet, the evidence base to support this is limited. This study investigates the comparative experience of men with long-term disabilities and men without long-term disabilities who go to a Men's Shed and to what extent this provides these men with an enabling, as opposed to disabling, environment. Data were collected from 12 individual interviews with men with long-term disabilities (5) and men without long-term disabilities (6), including 1 interview with the male Men's Shed Coordinator (MSC); participant observation within the shed; and a document received from the female MSC regarding the funding the Shed receives. Interviews explored the men's experiences at the Shed and their sense of belonging and social inclusion. Participants had any type of long-term disability and had been attending the shed for a minimum of 1 month. Data were collected between May and September 2013 and were analysed using the constant comparative method of grounded theory. The core theme that emerged was an enabling community space. The four sub-themes were: a community and social hub; an equalising space; a safe and supportive male environment; and meaningful male activities. The current literature exemplifies Men's Sheds to be important community-based organisations beneficial to men's health and well-being. For men living with long-term disabilities, this study illuminates that Men's Sheds offer an environment of equality, facilitating a collegial and egalitarian culture. Men can partake in enabling activities and enjoy the company of other men enhancing their sense of belonging and social inclusion as well as interact with other community groups that occupy the same space as the Men's Shed. © 2014 John Wiley & Sons Ltd.

  7. Review of cytomegalovirus shedding in bodily fluids and relevance to congenital cytomegalovirus infection

    Science.gov (United States)

    Cannon, Michael J.; Hyde, Terri B.; Schmid, D. Scott

    2015-01-01

    SUMMARY Congenital cytomegalovirus (CMV) infections are a leading cause of sensorineural hearing loss (SNHL) and neurological impairment. Congenital transmission of CMV can occur with maternal primary infection, reactivation, or reinfection during pregnancy. We reviewed studies of CMV shedding in bodily fluids (defined as CMV detected by culture or CMV DNA detected by polymerase chain reaction). Following diagnosis at birth, children with congenital CMV infection exhibited the highest prevalences of CMV shedding (median = 80%, number of sample population prevalences [N] = 6) and duration of shedding, with a steep decline by age five. Healthy children attending day care shed more frequently (median = 23%, N = 24) than healthy children not attending day care (median = 12%, N = 11). Peak shedding prevalences in children occurred at 1–2 years of age, confirming that young children are the key transmission risk for pregnant women. CMV shedding among children was more prevalent in urine specimens than in oral secretions (median prevalence difference = 11.5%, N = 12). Adults with risk factors such as STD clinic attendance had higher shedding prevalences (median = 22%, N = 20) than adults without risk factors (median = 7%, N = 44). In adults with risk factors, CMV was shed more frequently in urine; in adults without risk factors genital shedding was most common. The prevalence of CMV shedding in nine sample populations of pregnant women increased with advancing gestation. In seven sample populations of children with congenital CMV infection, higher viral load at birth was consistently associated with an elevated risk of SNHL. Higher CMV viral load at birth also consistently correlated with the presence of symptoms of congenital CMV at birth. Published 2011. This article is a US Government work and is in the public domain in the USA. PMID:21674676

  8. Patterns of human herpesvirus-8 oral shedding among diverse cohorts of human herpesvirus-8 seropositive persons.

    Science.gov (United States)

    Bender Ignacio, Rachel A; Goldman, Jason D; Magaret, Amalia S; Selke, Stacy; Huang, Meei-Li; Gantt, Soren; Johnston, Christine; Phipps, Warren T; Schiffer, Joshua T; Zuckerman, Richard A; McClelland, R Scott; Celum, Connie; Corey, Larry; Wald, Anna; Casper, Corey

    2016-01-01

    Human herpesvirus-8 (HHV-8), the etiologic agent of Kaposi sarcoma (KS), establishes lifelong latent infection with periodic lytic replication ("shedding") at mucosal sites, especially the oropharynx. Patterns of HHV-8 shedding are not well understood, and require elucidation to better predict risk of HHV-8 related malignancies in those infected. We sought to characterize patterns of HHV-8 oropharyngeal shedding among diverse cohorts that enrolled HHV-8 seropositive persons. We quantified HHV-8 oral shedding using PCR among HHV-8 seropositive persons who collected at least 14 days of oral swabs in 22 studies on 3 continents. We excluded persons taking antivirals during sampling or any prior use of antiretrovirals in those who were HIV-infected. 248 participants were enrolled from the US, Peru, Cameroon, Uganda, and Kenya; 61 % were men, 58 % were HIV seropositive, and 16 % had KS. Overall, 3,123 of 10,557 samples (29.6 %) had HHV-8 detected. Quantity of virus shed was highly correlated with shedding rate, (ρ = 0.72, p < 0.0001). HHV-8 was detected in ≥1 sample in 55 % of participants with a median of 7 % of days in the US and Kenya, 0 % in Uganda and Peru, and 18 % in Cameroon. Median episode duration was three days, and episodes with high median quantity lasted longer (42 vs 3 days, p < 0.0001). In persons with multiple observations over time, 66 % of shedding rate variance was attributable to differences between individuals. In HHV-8 infected individuals from diverse settings, oral mucosal shedding rate, quantity, and duration were correlated; individual shedding was highly variable. Studies are needed to determine factors accounting for between-person variation and the relationship of HHV-8 shedding to development of associated diseases.

  9. Sub-harmonic frequency lock-in and vortex shedding synchronization due to regular and irregular surface waves.

    Science.gov (United States)

    Gunnoo, Hans; Abcha, Nizar; Bennis, Anne-claire; Levacher, Daniel

    2017-04-01

    The influence of both regular and irregular surface waves on a turbulent Von Karman vortex street has been investigated experimentally with the help of the phase modulation of the signals. The experiments have been performed in a hydrodynamic flume, where the Von Karman Street created behind a vertical cylinder is created by a steady current. The surface waves propagating upstream are excited by a computer controlled wave maker. It is found that the regular surface wave can give rise to different regimes of vortex shedding in the Von Karman Street: Sub-harmonic frequency lock-in arise if the frequency of the wave is approximately two times that of the vortex shedding frequency. We also observed another regime called harmonic frequency lock-in when the shedding frequency coincides with the frequency of the surface wave. Phase synchronization can also be obtained with irregular surface waves. In this case, the peak frequency of the applied surface wave spectrum is twice that of the vortex shedding frequency. The relationship between the vortex shedding frequency and the amplitude of the surface waves has been studied. It was found that an increase in the amplitude of the applied waves causes the shedding frequency to decrease and tends to half of the frequency of the applied wave. For a more detailed study of this effect, Hilbert transformation is applied. Using this transformation, the continuous phases of the surface waves fw and that of the Von Karman vortex street fk are calculated. The relation between the phases combination F= 2fk- fwand the surface wave amplitude is studied. It was found that the time-evolution of F has a step-like shape. The time interval of F having a slope around 0, corresponds to synchronization-like effect. This explains the changes obtained in the spectrum of the turbulent vortex shedding with an increase in the amplitude of the irregular surface waves. We then decided to compare the evolution of the scouring and the sandy patterns

  10. Segregation of QTL for production traits in commercial meat-type chickens.

    Science.gov (United States)

    De Koning, D J; Haley, C S; Windsor, D; Hocking, P M; Griffin, H; Morris, A; Vincent, J; Burt, D W

    2004-06-01

    This study investigated whether quantitative trait loci (QTL) identified in experimental crosses of chickens provide a short cut to the identification of QTL in commercial populations. A commercial population of broilers was targeted for chromosomal regions in which QTL for traits associated with meat production have previously been detected in extreme crosses. A three-generation design, consisting of 15 grandsires, 608 half-sib hens and over 15 000 third-generation offspring, was implemented within the existing breeding scheme of a broiler breeding company. The first two generations were typed for 52 microsatellite markers spanning regions of nine chicken chromosomes and covering a total of 730 cM, approximately one-fifth of the chicken genome. Using half-sib analyses with a multiple QTL model, linkage was studied between these regions and 17 growth and carcass traits. Out of 153 trait x region comparisons, 53 QTL exceeded the threshold for genome-wide significance while an additional 23 QTL were significant at the nominal 1% level. Many of the QTL affect the carcass proportions and feed intake, for which there are few published studies. Given intensive selection for efficient growth in broilers for more than 50 generations it is surprising that many QTL affecting these traits are still segregating. Future fine-mapping efforts could elucidate whether ancestral mutations are still segregating as a result of pleiotropic effects on fitness traits or whether this variation is due to new mutations.

  11. Effects of high dietary fluorine on erythrocytes and erythrocyte immune adherence function in broiler chickens.

    Science.gov (United States)

    Deng, Yubing; Cui, Hengmin; Peng, Xi; Fang, Jing; Zuo, Zhicai; Deng, Junliang; Luo, Qin

    2013-11-01

    Fluoride can exert toxic effects on soft tissues, giving rise to a broad array of symptoms and pathological changes. The aim of this study was to investigate on erythrocytes and erythrocyte immune adherence function in broiler chickens fed with high fluorine (F) diets by measuring the total erythrocyte count (TEC), the contents of hemoglobin (Hb), packed cell volumn (PCV), erythrocyte osmotic fragility (EOF), erythrocyte C3b receptor rosette rate (E-C3bRR), and erythrocyte immune complex rosette rate (E-ICRR). A total of 280 1-day-old healthy avian broiler chickens were randomly allotted into four equal groups of 70 birds each and fed with a corn-soybean basal diet containing 22.6 mg F/kg (control group) or same basal diets supplemented with 400, 800, and 1,200 mg F/kg (high F groups I, II, and III) in the form of sodium fluoride for 42 days. Blood samples were collected for the abovementioned parameters analysis at 14, 28, and 42 days of age during the experiment. The experimental results indicated that TEC, Hb, and PCV were significantly lower (p erythrocyte membrane, the transport capacity of oxygen and carbon dioxide, and erythrocyte immune adherence function in broiler chickens.

  12. Messenger RNA levels and transcription rates of hepatic lipogenesis genes in genetically lean and fat chickens

    Directory of Open Access Journals (Sweden)

    Douaire Madeleine

    2000-09-01

    Full Text Available Abstract Levels of body fat content in commercial meat chickens have prompted research in order to control the development of this trait. Based on experimentally selected divergent lean and fat lines, many studies have shown that liver metabolism has a major role in the fatness variability. In order to identify which genes are involved in this variability, we investigated the expression of several genes implicated in the hepatic lipid metabolism. The studied genes code for enzymes of fatty acid synthesis [ATP citrate-lyase (ACL, acetyl-CoA carboxylase (ACC, fatty acid synthase (FAS, malic enzyme (ME, stearoyl-CoA desaturase (SCD1], for an apolipoprotein [apolipoprotein A1 (APOA1], and for the CCAAT/enhancer binding protein α (C/EBPα, which is a transcription factor implied in the regulation of several genes of lipid metabolism. The results show that the fat-line chickens display significantly higher hepatic transcription rates and mRNA levels than the lean-line chickens for the ACL, ME and APOA1 genes. This suggests that these genes could be responsible for the phenotypic fatness variability.

  13. Kinetics of Texture and Colour Changes in Chicken Sausage during Superheated Steam Cooking

    Directory of Open Access Journals (Sweden)

    Abdulhameed Asmaa A.

    2016-07-01

    Full Text Available The aim of this study was to develop a kinetic model to describe the texture and colour changes of chicken sausage during superheated steam cooking. Chicken sausages were cooked at temperature ranging from 150-200°C with treatment times ranging from 2-6 mins. The texture profile was evaluated in terms of hardness, cohesiveness, gumminess, and chewiness, while the colour parameters were estimated in terms of lightness (L*, redness (a*, yellowness (b*, and total colour difference (∆E. Experimental data showed a gradual reduction in texture parameters as cooking times and temperatures increased. The L* value of the colour showed a linear reduction with cooking condition, while the a*, b*, and ∆E values showed a contrary effects. The decrease in texture parameters and L*-value of colour parameter followed the first-order kinetic model. While, zero-order kinetic model was adapted to fit the a* and b*. The modified first order kinetic showed a good fit for total ∆E. Significant correlations between colour and texture parameters were observed, which showed that a* alone could be used to predict the texture of chicken sausage.

  14. Performance of broiler chickens fed South African sorghum-based ...

    African Journals Online (AJOL)

    Two experiments were conducted to determine the influence of sorghum variety and xylanase on performance of broiler chickens. In Experiment 1A, a total of 240 day-old Ross broiler chickens were assigned to a 2 (sex) × 3 (sorghum variety) × 2 (with or without xylanase) factorial arrangement in a completely randomized ...

  15. Diversity and prevalence of Arcobacter spp. in broiler chickens

    DEFF Research Database (Denmark)

    Atabay, H.I.; Corry, J.E.L.; On, Stephen L.W.

    1998-01-01

    Ninety-nine strains of Arcobacter spp., isolated from 10 chicken carcasses purchased from a supermarket and 15 chicken carcasses collected from a poultry abattoir, were speciated using a variety of phenotypic identification methods. All were tested using API Campy test strips and the 16-test...

  16. Morphological features of indigenous chicken ecotype populations of Kenya

    NARCIS (Netherlands)

    Ngeno, K.; Waaij, van der E.H.; Kahi, A.K.; Arendonk, van J.A.M.

    2014-01-01

    This study characterized indigenous chicken (IC) ecotypes morphologically. Five IC ecotypes studied were Kakamega (KK), Siaya (BN), West Pokot (WP), Narok (NR) and Bomet (BM). Data on morphological features were collected from 1 580 chickens and 151 for zoometric measurements. Descriptive

  17. Sinai and Norfa chicken diversity revealed by microsatellite markers ...

    African Journals Online (AJOL)

    Sinai and Norfa chicken diversity revealed by microsatellite markers. M Soltan, S Farrag, A Enab, E Abou-Elewa, S El-Safty, A Abushady. Abstract. The present study aimed to outline the population differentiation of Sinai and Norfa chicken, native to Egypt, with microsatellite markers. Twenty microsatellite loci recommended ...

  18. Acceptability of chicken powder in home prepared complementary ...

    African Journals Online (AJOL)

    The chicken powder was incorporated into a breakfast meal (“Tom Brown”) and lunch/supper meal (rice and gravy) on weight basis according to predetermined proportions of the raw ingredients. Each meal consisted of a control sample (not containing chicken powder) and 3 test samples containing different amounts of ...

  19. Effect of chicken genotype on growth performance and feed ...

    African Journals Online (AJOL)

    This experiment was conducted to assess the effect of chicken genotype on the growth performance, feed intake and feed efficiency of the progenies resulting from pure, straight and reciprocal cross of Giriraja (Gr) and Alpha chickens. Data obtained on body weight, body length, breast girth, keel length, feed intake and feed ...

  20. Cross Reactivities of Rabbit Anti-Chicken Horse Radish Peroxidase ...

    African Journals Online (AJOL)

    Dr Olaleye

    ABSTRACT. The cross reactivities of rabbit anti chicken horse radish peroxidase (conjugate) was tested with sera of Chicken, Ducks, Geese, Guinea fowl, Hawks, Pigeons and Turkeys in indirect enzyme linked immunosorbent assay (ELISA) technique. Sera from mammalian species (Bat, Equine and swine) were used as.

  1. Prevalence of Eimeria species in local breed chickens in Gombe ...

    African Journals Online (AJOL)

    Eimeria species are protozoan parasites causing coccidiosis in exotic and local breeds of chickens. Coccidiosis is the most important protozoan disease to the world poultry industry and domestic chickens are considered susceptible to seven species of Eimeria. A survey was carried out between March and May 2010 in ...

  2. Detecting gallbladders in chicken livers using spectral analysis

    DEFF Research Database (Denmark)

    Jørgensen, Anders; Mølvig Jensen, Eigil; Moeslund, Thomas B.

    2015-01-01

    This paper presents a method for detecting gallbladders attached to chicken livers using spectral imaging. Gallbladders can contaminate good livers, making them unfit for human consumption. A data set consisting of chicken livers with and without gallbladders, has been captured using 33 wavelengt...

  3. Modelling responses of broiler chickens to dietary balanced protein

    NARCIS (Netherlands)

    Eits, R.M.

    2004-01-01

    Protein is an important nutrient for growing broiler chickens, as it affects broiler performance, feed cost as well as nitrogen excretion. The objective of this dissertation was to develop a growth model for broiler chickens that could be easily used by practical nutritionists. The model should

  4. Immunological differences between layer- and broiler-type chickens

    NARCIS (Netherlands)

    Koenen, M.E.; Boonstra-Blom, A.G.; Jeurissen, S.H.M.

    2002-01-01

    In commercial poultry husbandry, alternatives for the use of antibiotics and vaccines are under investigation, which preferably have to be applicable for both layer- and broiler-type chickens. There are indications that the defense mechanisms vary between layer- and broiler-type chickens. Therefore,

  5. Regional differences in recombination hotspots between two chicken populations

    NARCIS (Netherlands)

    Elferink, M.G.; As, van P.; Veenendaal, A.; Crooijmans, R.P.M.A.; Groenen, M.A.M.

    2010-01-01

    Background Although several genetic linkage maps of the chicken genome have been published, the resolution of these maps is limited and does not allow the precise identification of recombination hotspots. The availability of more than 3.2 million SNPs in the chicken genome and the recent advances in

  6. Cross reactivities of rabbit anti-chicken horse radish peroxidase ...

    African Journals Online (AJOL)

    The cross reactivities of rabbit anti chicken horse radish peroxidase (conjugate) was tested with sera of Chicken, Ducks, Geese, Guinea fowl, Hawks, Pigeons and Turkeys in indirect enzyme linked immunosorbent assay (ELISA) technique. Sera from mammalian species (Bat, Equine and swine) were used as negative ...

  7. Assessing the expression of chicken anemia virus proteins in plants

    NARCIS (Netherlands)

    Lacorte, C.C.; Lohuis, H.; Goldbach, R.W.; Prins, M.W.

    2007-01-01

    Chicken anemia virus (CAV) is an important pathogen of chicken worldwide, causing severe anemia and immunodeficiency. Its small single-stranded DNA genome (2.3 kb) encodes three proteins: VP1, the only structural protein, VP2, a protein phosphatase, and VP3, also known as apoptin, which induces

  8. Glucuronidase activity of Escherichia coli isolated from chicken carcasses

    OpenAIRE

    Perin,Luana Martins; Yamazi,Anderson Keizo; Moraes,Paula Mendonça; Cossi,Marcus Vinícius Coutinho; Pinto,Paulo Sérgio de Arruda; Nero,Luís Augusto

    2010-01-01

    To identify Escherichia coli through the production of β-D-glucuronidase (GUD), 622 suspect cultures were isolated from chicken carcasses and plated in PetrifilmTM EC. Of these cultures, only 44 (7.1%) failed to produce GUD. This result indicates the usefulness of GUD production for estimating E. coli populations in chicken.

  9. Genetic variation of indigenous chicken breeds in China and a ...

    African Journals Online (AJOL)

    Polymorphic bands, breed-specific bands and genetic similarity coefficients of 13 chicken breeds were derived from the AFLP data. A total of 280 polymorphic bands was generated from which nine specific bands were observed for the Shouguang and the Dongxiang Dark chicken. One specific band was observed in the ...

  10. Genetic diversity of four protected indigenous chicken breeds in ...

    African Journals Online (AJOL)

    The genetic diversity of four protected indigenous chicken breeds was evaluated with 25 microsatellite markers. Polymorphism information content (PIC), heterozygosity with the estimator of genetic differentiation FST and Nei's genetic distance were evaluated. The results showed that these four protected local chicken ...

  11. Techniques for collecting blood from the domestic chicken.

    Science.gov (United States)

    Kelly, Lisa M; Alworth, Leanne C

    2013-10-01

    As the use of chickens in biomedical research is increasing, demand is growing for technical skills involving poultry, particularly techniques such as venipuncture. Phlebotomy (blood collection) is an important diagnostic tool for determining causes of morbidity and mortality and for collection of other research-relevant data. This column describes four standard methods of blood collection from the domestic chicken.

  12. Marketing functions and determinants of profit among frozen chicken ...

    African Journals Online (AJOL)

    This study attempted to estimate the cost of performing some functions in frozen chicken marketing and determined the major factors affecting the profit level of the marketers. Using data collected from 10 wholesalers and 29 retailers in Ibadan metropolis, the transportation costs per kilogram of frozen chicken were N1.20 ...

  13. Response of finishing broiler chickens to supplemental Neem ...

    African Journals Online (AJOL)

    An eight weeks feeding trial was conducted to investigate the effects of feeding diets containing Neem Leaf Meal (NLM), Garlic Meal (GM) and their combinations (NLM +GM) on oocyst count, bacteria count and gut morphology of finishing broiler chickens. A total of 180 day-old Cobb broiler chickens were divided into twelve ...

  14. Sero-prevalence of infectious bursal disease in backyard chickens ...

    African Journals Online (AJOL)

    There was a significant difference (P < 0.05) in the sero-prevalence of IBDV among/between the different age groups, sex and origin of chickens. The result of this study indicates that IBD is prevalent in the study area. The prevalence of IBDV antibody in unvaccinated backyard chickens might be due to field exposure of ...

  15. Investigating eggs hatchability in indigenous chicken system with ...

    African Journals Online (AJOL)

    ... animal behaviour (indigenous chicken hens genetic potential) and environment (regions) all have some influence on the performance of indigenous chicken flocks. This study also provides empirical evidence that farmer participatory research is a development concept that has great potential in supporting innovation and ...

  16. Supplier-retailer relational satisfaction in the chicken industry ...

    African Journals Online (AJOL)

    The purpose of this study is to determine the factors that influence the relational satisfaction between chicken retailers and chicken suppliers in Terengganu. In this study, relational satisfaction as the dependent variable and six independent variables, namely trust, commitment, service quality, personal, organization and the ...

  17. Study on Gastrointestinal Helminthes of Backyard Local Chickens in ...

    African Journals Online (AJOL)

    A study was conducted to determine the prevalence of gastrointestinal helminthes in chickens raised under traditional management system in three selected agro ecological areas of East Shoa namely Akaki, Ada'a and Adama. The study showed that 517 (86.17%) of the examined chickens (n= 600) were found to be ...

  18. Sinai and Norfa chicken diversity revealed by microsatellite markers

    African Journals Online (AJOL)

    Sami

    2017-12-22

    Dec 22, 2017 ... variability, population structure, and genetic relationships within two local chicken strains (i.e., Sinai and. Norfa chicken) in Menoufia governorate, Egypt. Used markers were chosen from a set of 30 microsatellites nominated by the International Society of Animal Genetics (ISAG)-FAO by the FAO's MoDAD ...

  19. On-farm Phenotypic Characterization of Indigenous Chicken and ...

    African Journals Online (AJOL)

    The red, Gebsima and white plumage color were dominated in the study area. The local chickens possessed yellow shanks, white skin, single combs and white and red earlobe. The mean body weight of indigenous male and female chickens was 1.42±0.02 kg and 1.18±0.01 kg, respectively. The effective population size ...

  20. Population structure and genetic diversity of Sudanese native chickens

    African Journals Online (AJOL)

    The objectives of this study were to analyze genetic diversity and population structure of Sudanese native chicken breeds involved in a conservation program. Five Sudanese native chicken breeds were compared with populations studied previously, which included six purebred lines, six African populations and one ...