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Sample records for actinomyces

  1. Comparative histopathology of lesions produced by Actinomyces israelii, Actinomyces naeslundii, and Actinomyces viscosus in mice.

    Behbehani, M J; Heeley, J D; Jordan, H. V.

    1983-01-01

    The histopathologic features of experimental actinomycotic lesions produced in mice by Actinomyces israelii, Actinomyces naeslundii, and Actinomyces viscosus were examined. In lesions caused by A israelii the outer edge of the bacterial granule exhibited an eosinophilic fringe with no evidence of penetration of polymorphonuclear leukocytes (PMNs) into the bacterial granule. Chronic lesions after 6 weeks contained lobulated advancing fronts as well as areas of resolution showing heavy penetrat...

  2. Actinomyces naeslundii: An Uncommon Cause of Endocarditis

    Cortes, Christopher D.; Carl Urban; Glenn Turett

    2015-01-01

    Actinomyces rarely causes endocarditis with 25 well-described cases reported in the literature in the past 75 years. We present a case of prosthetic valve endocarditis (PVE) caused by Actinomyces naeslundii. To our knowledge, this is the first report in the literature of endocarditis due to this organism and the second report of PVE caused by Actinomyces.

  3. Actinomyces naeslundii: An Uncommon Cause of Endocarditis

    Christopher D. Cortes

    2015-01-01

    Full Text Available Actinomyces rarely causes endocarditis with 25 well-described cases reported in the literature in the past 75 years. We present a case of prosthetic valve endocarditis (PVE caused by Actinomyces naeslundii. To our knowledge, this is the first report in the literature of endocarditis due to this organism and the second report of PVE caused by Actinomyces.

  4. Actinomyces naeslundii: An Uncommon Cause of Endocarditis.

    Cortes, Christopher D; Urban, Carl; Turett, Glenn

    2015-01-01

    Actinomyces rarely causes endocarditis with 25 well-described cases reported in the literature in the past 75 years. We present a case of prosthetic valve endocarditis (PVE) caused by Actinomyces naeslundii. To our knowledge, this is the first report in the literature of endocarditis due to this organism and the second report of PVE caused by Actinomyces. PMID:26697243

  5. Cellular coaggregation of oral Streptococcus milleri with actinomyces.

    Eifuku, H; Yakushiji, T; Mizuno, J.; Kudo, N.; M. Inoue

    1990-01-01

    Oral isolates of Streptococcus milleri were examined for their ability to coaggregate with actinomyces. Of the 68 S. milleri strains tested, including 3 reference strains, 40 strains coaggregated with Actinomyces naeslundii WVU45 (actinomyces coaggregation group B) and 36 strains coaggregated with Actinomyces viscosus T14V (actinomyces coaggregation group A). All S. milleri strains of serotypes b (4 strains), e (2 strains), and f (24 strains) coaggregated with both of the actinomyces. The coa...

  6. Evidence for recombination between a sialidase (nanH) of Actinomyces naeslundii and Actinomyces oris, previously named ‘Actinomyces naeslundii genospecies 1 and 2’

    Do, Thuy; Henssge, Uta; Gilbert, Steven C.; Clark, Douglas; Beighton, David

    2008-01-01

    Actinomyces spp., predominant members of human oral biofilms, may use extracellular sialidase to promote adhesion, deglycosylate immunoglobulins and liberation of nutrients. Partial nanH gene sequences (1077 bp) from Actinomyces oris (n =74), Actinomyces naeslundii (n =30), Actinomyces viscosus (n =1) and Actinomyces johnsonii (n =2) which included the active-site region and the bacterial neuraminidase repeats (BNRs) were compared. The sequences were aligned and each species formed a distinct...

  7. Extensive Actinomyces naeslundii infection in a child.

    Dobson, S R; Edwards, M S

    1987-01-01

    A case of extensive Actinomyces naeslundii infection in a globally retarded patient is reported. To our knowledge, this uncommon Actinomyces species has not previously been described as a cause of widespread disease. Mental retardation and thoracic scoliosis were identified as features predisposing to infection.

  8. Coaggregation of Prevotella intermedia with oral Actinomyces species.

    Nesbitt, W E; Fukushima, H.; Leung, K P; Clark, W B

    1993-01-01

    Five strains of Prevotella intermedia were examined for their ability to coaggregate with various gram-positive and gram-negative species of oral bacteria. Two of the P. intermedia strains coaggregated with selected Actinomyces species, P. intermedia 27 with Actinomyces viscosus T14V and Actinomyces naeslundii ATCC 12104, PK606, PK984, and PK947, and P. intermedia 113 with Actinomyces odontolyticus WVU 1546 and Actinomyces israelii WVU 838. Exposure of both Prevotella strains but not the Acti...

  9. [Cervical actinomycosis due to Actinomyces naeslundii].

    Kimura, Hiroshi

    2011-07-01

    Actinomyces naeslundii, an oral biofilm bacterium of, can be cured using intravenous piperacillin, clindamycin, and surgery. We report a case of cervical actinomycosis due to Actinomyces naeslundii. A 56-year-old man seen for right cervical swelling had undergone dental work. Computed tomography indicated an abscess, from which we aspirated pus using a needle. Although no sulfur granules were found, pus yielded Actinomyces naeslundii. This case is, to our knowledge, the first reported in Japan of cervical actinomycosis due to A. naeslundii. PMID:21838058

  10. Binding of Actinomyces naeslundii to glycosphingolipids.

    Brennan, M J; Joralmon, R A; Cisar, J O; Sandberg, A L

    1987-01-01

    The type 2 fimbrial lectin of Actinomyces naeslundii WVU45 mediated the binding of this bacterium to glycosphingolipids chromatographed on thin-layer silica gel plates. Radioiodinated bacteria attached to GM1, GD1b, and globoside. After chromatograms were treated with sialidase, the bacteria also bound to GD1a and GT1b. The actinomyces lectin apparently recognized the Gal beta 3GalNAc termini of these gangliosides and the GalNAc beta 3Gal terminus of globoside, suggesting that glycolipids con...

  11. Actinomyces turicensis Bacteremia Secondary to Pyometra.

    Hagiya, Hideharu; Ogawa, Hiroko; Takahashi, Yusuke; Kimura, Kosuke; Hasegawa, Kan; Otsuka, Fumio

    2015-01-01

    We herein present a rare case of Actinomyces turicensis bacteremia that was caused by pyometra. The patient was successfully treated with transvaginal drainage and antibiotic therapy. A literature review in MEDLINE showed that there have been only 8 previously reported cases of A. turicensis bacteremia. This infection frequently occurs in patients with visceral abscesses, and blood culture examinations usually reveal a polymicrobial pattern. However, the prognosis of such patients has been reported to generally be benign. Due to difficulties in performing bacterial identification and the wide-spectrum clinical pictures associated with this bacteremia, no comprehensive understanding of the clinical features of each Actinomyces species has yet been established. PMID:26521910

  12. Sialidase-Enhanced Lectin-Like Mechanism for Actinomyces viscosus and Actinomyces naeslundii Hemagglutination

    Ellen, R P; Fillery, E D; Chan, K.H.; Grove, D A

    1980-01-01

    Laboratory strains representing six numerical taxonomy clusters and fresh isolates of human Actinomyces viscosus and Actinomyces naeslundii were studied by standard flocculation slide tests for the ability to hemagglutinate erythrocytes (RBC) from various animal species. Human AB and horse RBC were agglutinated more frequently and rapidly than others; guinea pig RBC were agglutinated by only a few strains. Human AB RBC were selected for studies of hemagglutination mechanisms. Treatment of RBC...

  13. Actinomyces bowdenii ulcerative keratitis in a dog.

    Sherman, Amanda; Daniels, Joshua B; Wilkie, David A; Lutz, Elizabeth

    2013-09-01

    A 5-year-old spayed female diabetic mixed-breed dog underwent phacoemulsification and intraocular lens implantation to correct bilateral hypermature cataracts. Two months postsurgery, the patient presented with ulcerative keratitis and multifocal stromal abscessation OD, which was controlled, but never resolved, with topical fluoroquinolone therapy. The patient re-presented 2 months later with a new, raised, white gritty corneal opacity associated with hyperemia, chemosis, and blepharospasm OD. Cytology of the right cornea revealed filamentous bacteria, suggestive of Actinomyces spp. Actinomyces bowdenii was subsequently isolated in pure culture and identified via 16s rDNA sequencing. Actinomyces bowdenii has never before been described as a cause of ocular infection. An immunosuppressed corneal environment likely contributed to this opportunistic Actinomycosis. The infection was not controlled with fluoroquinolone therapy, and the isolate, in vitro, was resistant to three fluoroquinolones (ciprofloxacin, ofloxacin, and levofloxacin), which also has not been previously reported for this species of Actinomyces. A superficial keratectomy with conjunctival graft was employed to successfully manage the infection. PMID:23121462

  14. Intergeneric bacterial coaggregations involving mutans streptococci and oral actinomyces.

    Crowley, P J; Fischlschweiger, W; Coleman, S E; Bleiweis, A S

    1987-01-01

    Mutans streptococci (MS) representing eight different serotypes were tested for their ability to coaggregate in vitro with oral actinomyces and other streptococcal species. Of the mutans streptococci tested, only strains of S. cricetus (formerly S. mutans serotype a) displayed pronounced coaggregations and only with certain strains of actinomyces. S. cricetus coaggregated, by lactose nonreversible mechanisms, with serotype 4 Actinomyces naeslundii WVU963 and WVU924 and with serotype 2 Actinom...

  15. Isolation of Actinomyces bacteriophage from human dental plaque.

    Tylenda, C A; Calvert, C.; Kolenbrander, P. E.; Tylenda, A

    1985-01-01

    Human dental plaque samples were screened for the presence of bacteriophage for Actinomyces viscosus and Streptococcus sanguis. None of the 336 samples yielded phage for S. sanguis, but 10 contained virulent actinomyces phage. A high host cell specificity was observed in that one phage isolate infected only A. viscosus T14V, eight phage isolates infected only A. viscosus MG-1, and one infected both strains. None was capable of productively infecting various other actinomyces strains that repr...

  16. Pyometra Perforation Caused by Actinomyces without Intrauterine Device Involvement

    Hideharu Hagiya

    2013-01-01

    An 86-year-old woman with diabetes mellitus and severe decubitus at the sacral and calcaneal regions stemming from poor daily activity was diagnosed with pyometra perforation caused by Actinomyces. No foreign materials, including an IUD, were found inside the uterus. Pyometra is usually caused by Enterobacteriaceae or anaerobes derived from the gastrointestinal tract. The virulence of Actinomyces is rather low, and, in almost all the reported cases of Actinomyces-related pyometra, an intraut...

  17. Pyometra Perforation Caused by Actinomyces without Intrauterine Device Involvement

    Hideharu Hagiya

    2013-01-01

    Full Text Available An 86-year-old woman with diabetes mellitus and severe decubitus at the sacral and calcaneal regions stemming from poor daily activity was diagnosed with pyometra perforation caused by Actinomyces. No foreign materials, including an IUD, were found inside the uterus. Pyometra is usually caused by Enterobacteriaceae or anaerobes derived from the gastrointestinal tract. The virulence of Actinomyces is rather low, and, in almost all the reported cases of Actinomyces-related pyometra, an intrauterine device (IUD was involved. Although rare, Actinomyces may be ascribed as a virulent pathogen that causes pyometra in the absence of foreign materials.

  18. Application of MLST and pilus gene sequence comparisons to investigate the population structures of Actinomyces naeslundii and Actinomyces oris

    U. Henssge; T. Do; S.C. Gilbert; S. Cox; D. Clark; C. Wickström; A.J.M. Ligtenberg; D.R. Radford; D. Beighton

    2011-01-01

    Actinomyces naeslundii and Actinomyces oris are members of the oral biofilm. Their identification using 16S rRNA sequencing is problematic and better achieved by comparison of metG partial sequences. A. oris is more abundant and more frequently isolated than A. naeslundii. We used a multi-locus sequ

  19. New Actinomyces and Streptococcus coaggregation groups among human oral isolates from the same site.

    Kolenbrander, P. E.; Inouye, Y.; Holdeman, L V

    1983-01-01

    The coaggregation properties of recent human oral streptococcal and actinomyces isolates from the same site were determined and compared with the coaggregation properties of well-characterized stock strains of these two kinds of bacteria. Streptococcus sanguis, Actinomyces viscosus, Actinomyces naeslundii, and phenotypically similar strains of actinomyces were isolated from subgingival samples from periodontally healthy older individuals, from persons participating in an experimental gingivit...

  20. Adhesion of actinomyces isolates to experimental pellicles.

    Steinberg, D; Kopec, L K; Bowen, W H

    1993-06-01

    The ability of oral bacteria to adhere to surfaces is associated with their pathogenicity. Actinomyces can adhere to pellicle and cells through extracellular fimbriae. Research on adhesion of actinomyces has been conducted with use of hydroxyapatite (HA) coated with mammalian-derived salivary constituents, whereas the bacterial-derived components of the acquired pellicle have been largely ignored. The influence of the cell-free bacterial enzyme, glucosyltransferase (GTF), on adhesion of human and rodent isolates of Actinomyces viscosus was examined. Cell-free GTF was adsorbed onto parotid saliva-coated hydroxyapatite (sHA). Next, A. viscosus was exposed to the pellicle following the synthesis of glucan formed in situ by GTF. Glucans formed on the pellicle served as binding sites for adhesion of a rodent strain of A. viscosus. Conversely, the presence of in situ glucans on sHA reduced the adhesion of human isolates of A. viscosus compared with their adhesion to sHA. Adhesion of the rodent strains may be facilitated through a dextran-binding protein, since the rodent strains aggregated in the presence of dextrans and mutan. The human isolates were not aggregated by dextran or mutan. Pellicle harboring A. viscosus rodent strains interfered with the subsequent adhesion of Streptococcus mutans to the bacterial-coated pellicle. In contrast, the adhesion of S. mutans to pellicle was not decreased when the pellicle was pre-exposed to a human isolate of A. viscosus. The experimental data suggest that human and the rodent isolates of A. viscosus have distinct glucan adhesion properties.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:8496474

  1. Emended description of Actinomyces naeslundii and descriptions of Actinomyces oris sp. nov. and Actinomyces johnsonii sp. nov., previously identified as Actinomyces naeslundii genospecies 1, 2 and WVA 963

    Henssge, Uta; Do, Thuy; Radford, David R.; Gilbert, Steven C.; Clark, Douglas; Beighton, David

    2009-01-01

    Actinomyces naeslundii is an important early colonizer in the oral biofilm and consists of three genospecies (1, 2 and WVA 963) which cannot be readily differentiated using conventional phenotypic testing or on the basis of 16S rRNA gene sequencing. We have investigated a representative collection of type and reference strains and clinical and oral isolates (n=115) and determined the partial gene sequences of six housekeeping genes (atpA, rpoB, pgi, metG, gltA and gyrA). These sequences ident...

  2. Prevalence of Actinomyces spp. in patients with chronic periodontitis.

    Vielkind, Paul; Jentsch, Holger; Eschrich, Klaus; Rodloff, Arne C; Stingu, Catalina-Suzana

    2015-10-01

    This study investigated the prevalence of Actinomyces spp. in shallow, deep and very deep pockets of patients with chronic periodontitis compared to healthy controls and correlated the results with clinical status. Twenty patients with chronic periodontitis and 15 healthy subjects were enrolled in this study. Clinical indices were recorded in a six-point measurement per tooth. From each patient samples of supra and subgingival plaque were taken separately from teeth with shallow, deep and very deep pockets. Samples of supragingival plaque and sulcular microflora were collected from the healthy subjects. All the samples were cultivated on different media at 37̊C in an anaerobic atmosphere for 7 days. All the suspect colonies were identified using a rapid ID 32 A system (bioMèrieux) and MALDI-TOF-MS analysis using an Autoflex II Instrument (Bruker Daltonics) together with in house developed identification software and a reference spectra database. A total of 977 strains were identified as Actinomyces. Actinomyces naeslundii/oris/johnsonii (430 isolates) was the most prevalent species and was found in all patients and in almost all of the healthy subjects. Significant differences (p=0.003) between the groups were found for Actinomyces odontolyticus/meyeri and Actinomyces israelii which were associated with periodontitis patients. Actinomyces dentalis was found in higher percentage (p=0.015) in the periodontitis group. Actinomyces gerencseriae and Actinomyces massiliensis were significantly more often found supragingivally than subgingivally (p=0.004, p=0.022, respectively) in the periodontitis group. Whether some Actinomyces species, definitely important plaque formers, are actively involved in the pathogenicity of chronic periodontitis needs further investigation. PMID:26324012

  3. Actinomyces israelii May Produce Vulvar Lesions Suspicious for Malignancy

    2006-01-01

    Full Text Available Background. We present a case of Actinomyces israelii causing vulvar mass suspicious for malignancy in a postmenopausal woman. Case. A 60 year-old woman presented due to a firm, nonmobile, 10 cm vulvar mass, which had been rapidly enlarging for 5 months. The mass was painful, with localized pruritus and sinus tracts oozing of serosanguinous fluid. Biopsy and cultures revealed a ruptured epidermal inclusion cyst containing granulation tissue and Actinomyces israelii. Conclusion. Actinomyces israelii may produce vulvar lesions that are suspicious for malignancy. Thus, biopsies and cultures are both mandatory while evaluating vulvar masses suspicious for malignancy.

  4. Ventriculoperitoneal Shunt Infection Caused by Actinomyces neuii subsp. neuii▿

    Watkins, Richard R.; Anthony, Kathy; Schroder, Suzanne; Hall, Gerri S.

    2008-01-01

    Actinomyces neuii subsp. neuii is a rare isolate in clinical specimens. The organism was previously designated CDC coryneform group 1 and was renamed in 1994. A case of a ventriculoperitoneal shunt infection caused by this organism is described.

  5. ACTINOMYCES NAESLUNDII IN PATIENTS WITH HEMATOLOGICAL MALIGNANCIES

    S. H. Rasa J. V Yusefi

    2006-09-01

    Full Text Available Mycotic infections have been commonly encountered in patients with hematological malignancies. The current study seeks the prevalence of actinomycete infection in patients suffering from blood cells malignancies. A hundred and fifty patients with some kinds of blood cells dyscrasia who underwent the bone marrow aspiration were recruited. In addition to the diagnostic work up, samples were examined for the presence of actinomycete infections. Twenty one samples were positive for actinomycete infections. All of them were infected by Actinomyces naeslundii. All the positive patients were categorized in malignant groups, acute myelocytic leukemia, chronic myelocytic leukemia, and lymphoma and myelodysplastic syndrome. High incidence of actinomycete infections in the present study population was interesting. These results can also be suggestive of a pre-malignancy role for the actinomycosis.

  6. Cell-associated levan of Actinomyces viscosus.

    Warner, T N; Miller, C H

    1978-01-01

    Actinomyces viscosus ATCC 15987 was examined for the presence of cell-associated levan by absorption of myeloma proteins with antilevan activity and direct immunofluorescence. Levan was not detectable on the surface of glucose-grown A. viscosus, but after a brief incubation of these cells with 5% sucrose, they were encapsulated with tenaciously adhering levan. The levan layer constituted between 0.02 and 0.03% of the cell dry weight. In contrast, sucrose-grown A. viscosus cells possessed a low level of cell-associated levan, which was only moderately increased by incubation in sucrose and which partially existed as a loose slime rather than a tenacious capsule. Images PMID:344220

  7. Bacteroides gingivalis vesicles bind to and aggregate Actinomyces viscosus.

    Ellen, R P; Grove, D A

    1989-01-01

    Isolated Bacteroides gingivalis 2561 vesicles aggregated suspensions of Actinomyces viscosus and Actinomyces naeslundii of all taxonomy clusters. Vesicles bound near A. viscosus cell walls and among its surface fibrils. Tritiated vesicles bound slightly better to saliva-coated hydroxyapatite (SHA) than to SHA coated with A. viscosus; saturation was approached at the concentrations that were tested. Pretreatment of A. viscosus-coated SHA with vesicles impaired the subsequent adherence of B. gi...

  8. Actinomyces viscosus fibril antigens detected by immunogold electron microscopy.

    Ellen, R P; Buivids, I A; Simardone, J R

    1989-01-01

    Strains representing taxonomic clusters of Actinomyces viscosus and Actinomyces naeslundii were studied by indirect immunogold electron microscopy with either monospecific anti-type 1 and anti-type 2 rabbit antibodies or species-specific monoclonal antibodies. The monoclonal and anti-type 2 antibodies localized on long fibrils, whereas the anti-type 1 antibodies mostly localized close to the cell body or on shorter appendages.

  9. A Pathological Analysis of Canaliculitis Concretions: More Than Just Actinomyces

    Balaji Perumal; John Andrew Carlson; Dale Robert Meyer

    2016-01-01

    Purpose. Canaliculitis is classically associated with Actinomyces species, which are filamentous bacteria; the purpose of this study was to evaluate the extent to which nonfilamentous bacteria colonize canalicular concretions by using graded histopathological analysis. Methods. This is a series of 16 cases. The percentage of Gram-positive/Gomori’s methenamine silver-positive filamentous bacteria (Actinomyces) versus the total bacteria identified was graded, and the types of bacteria seen were...

  10. Structural preferences of beta-galactoside-reactive lectins on Actinomyces viscosus T14V and Actinomyces naeslundii WVU45.

    McIntire, F. C.; Crosby, L. K.; Barlow, J J; Matta, K L

    1983-01-01

    Specificities of lectins on Actinomyces viscosus T14V and Actinomyces naeslundii WVU45 were compared by measuring the abilities of D-galactose, N-acetyl-D-galactosamine, 14 beta-D-galacto-oligosaccharides, and 2 beta-D-fuco-oligosaccharides to inhibit coaggregation between Streptococcus sanguis 34 and each actinomycete. Inhibition profiles were similar, but WVU45 was significantly more sensitive to several inhibitors. D-Galactose-beta(1 leads to 3)-N-acetyl-D-galactosamine glycosides were mos...

  11. Assignment of Actinomyces viscosus and Actinomyces naeslundii strains to numerical taxonomy clusters by immunofluorescence based on antifibril antisera.

    Ellen, R P; Grove, D A

    1985-01-01

    A previous observation, using a few representative laboratory strains, that rabbit antisera raised against isolated surface fibrils might be useful in identifying Actinomyces viscosus and Actinomyces naeslundii isolates to their correct numerical taxonomy clusters was reexamined with a large culture collection, including clinical isolates from three different laboratories. Strains were first identified by a slower standard procedure, including agglutination with anti-whole-cell antisera, cata...

  12. Development of a selective medium for detection and enumeration of Actinomyces viscosus and Actinomyces naeslundii in dental plaque.

    Zylber, L J; Jordan, H. V.

    1982-01-01

    A selective medium (CFAT) was developed for the detection and enumeration of Actinomyces viscosus and Actinomyces naeslundii in dental plaque. Neutral acriflavin and potassium tellurite were used in combination with the known selective agents cadmium and fluoride to eliminate most of the competing plaque flora. Composition of CFAT per liter was as follows: Trypticase soy broth (BBL Microbiology Systems), 30 g; glucose, 5 g; agar, 15 g' cadmium sulfate, 13 mg; sodium fluoride, 85 mg; neutral a...

  13. Application of MLST and Pilus gene sequence comparisons to investigate the population structures of Actinomyces naeslundii and Actinomyces oris

    Uta Henssge; Thuy Do; Gilbert, Steven C.; Steven Cox; Douglas Clark; Claes Wickström; Ligtenberg, A.J.M.; Radford, David R.; David Beighton

    2011-01-01

    Actinomyces naeslundii and Actinomyces oris are members of the oral biofilm. Their identification using 16S rRNA sequencing is problematic and better achieved by comparison of metG partial sequences. A. oris is more abundant and more frequently isolated than A. naeslundii. We used a multi-locus sequence typing approach to investigate the genotypic diversity of these species and assigned A. naeslundii (n = 37) and A. oris (n = 68) isolates to 32 and 68 sequence types (ST), respectively. Neighb...

  14. Chemical and immunological comparison of surface fibrils of strains representing six taxonomic groups of Actinomyces viscosus and Actinomyces naeslundii.

    Masuda, N.; Ellen, R P; Fillery, E D; Grove, D A

    1983-01-01

    Human isolates of Actinomyces viscosus and Actinomyces naeslundii have been divided into six clusters in a numerical taxonomy study. Surface fibrils of strains representing these clusters were isolated and purified. Chemical analyses revealed that the major component of all fibrils was protein and that although differences in percentages of specific amino acid residues were found, the relative proportions of basic, acidic, polar uncharged, and nonpolar amino acids were rather similar among cl...

  15. Effect of saliva on coaggregation of oral Actinomyces and Streptococcus species.

    Kolenbrander, P. E.; Phucas, C S

    1984-01-01

    Human oral actinomyces and streptococci that exhibit specific coaggregation patterns when the cells are suspended in buffer were tested for their ability to coaggregate in saliva. Of 53 paired combinations of actinomyces (Actinomyces viscosus, A. naeslundii, or Actinomyces sp. WVa 963) and streptococci (Streptococcus sanguis or S. morbillorum) that exhibited coaggregation in buffer, all but 4 pairs also coaggregated when suspended in saliva. Twenty-four pairs exhibited lactose-inhibited coagg...

  16. Actinomyces naeslundii in initial dental biofilm formation.

    Dige, I; Raarup, M K; Nyengaard, J R; Kilian, M; Nyvad, B

    2009-07-01

    The combined use of confocal laser scanning microscopy (CLSM) and fluorescent in situ hybridization (FISH) offers new opportunities for analysis of the spatial relationships and temporal changes of specific members of the microbiota of intact dental biofilms. The purpose of this study was to analyse the patterns of colonization and population dynamics of Actinomyces naeslundii compared to streptococci and other bacteria during the initial 48 h of biofilm formation in the oral cavity. Biofilms developed on standardized glass slabs mounted in intra-oral appliances worn by ten individuals for 6, 12, 24 and 48 h. The biofilms were subsequently labelled with probes against A. naeslundii (ACT476), streptococci (STR405) or all bacteria (EUB338), and were analysed by CLSM. Labelled bacteria were quantified by stereological tools. The results showed a notable increase in the number of streptococci and A. naeslundii over time, with a tendency towards a slower growth rate for A. naeslundii compared with streptococci. A. naeslundii was located mainly in the inner part of the multilayered biofilm, indicating that it is one of the species that attaches directly to the acquired pellicle. The participation of A. naeslundii in the initial stages of dental biofilm formation may have important ecological consequences. PMID:19406899

  17. Levan and levansucrase of Actinomyces viscosus.

    Pabst, M J

    1977-01-01

    A levansucrase was demonstrated in the growth medium and in association with the cell surface of Actinomyces viscosus. The amount of enzyme produced relative to cell density is not significantly affected by the growth conditions. Sugar alcohols inhibit growth of the cells. The levansucrase hydrolyzes sucrose to produce free glucose and levan; some free fructose is also formed. There is no requirement for cofactors. The Km for sucrose is 12 mM. A variety of heavy metal ions and two disaccharides, lactose and cellobiose, inhibit the enzyme. The levansucrase was purified to homogeneity and has a specific activity of 90 micronmol of glucose release per min per mg. The enzyme has a molecular weight of 220,000 and is composed of subunits of molecular weight 80,000. The levan product contains both beta(2 leads to 1) and beta(2 leads to 6) linkages. The enzyme remains tightly bound to the levan product, resulting in the formation of high-molecular-weight polymer on the order of 10(8) daltons. The possible role of the levan and levansucrase of A. viscosus in the pathogenesis of periodontal disease is discussed. Images PMID:14893

  18. Empiema por Actinomyces: el gran simulador Empyema due to Actinomyces: a diagnostic challenge

    Fernando J. Vázquez

    2006-02-01

    Full Text Available El derrame pleural aislado, como única manifestación de la actinomicosis es una situación muy rara y un desafío diagnóstico para el clínico, no sólo por su infrecuencia sino por la dificultad técnica para cultivar al gérmen. La típica apariencia microscópica de este bacilo Gram-positivo ramificado en los cultivos suele ser la clave del dianóstico. Se informa un caso de derrame pleural masivo izquierdo por Actinomyces israelii, sin afectación del parénquima pulmonar, de difícil diagnóstico, que mejoró clínica y radiológicamente en forma completa con el drenaje quirúrgico y tratamiento antibiótico prolongado.Isolated pleural effusion due to actinomycosis is rare and poses a diagnostic challenge to clinicians not only because it is uncommon and often forgotten, but also because culture of the causative microorganism is technically difficult. The classic al microscopic appearance of this Gram-positive bacillus on cultures often forms the basis of diagnosis. This is the report of a case of massive left sided pleural effusion due to Actinomyces israelii that improved clinically and radiologically after surgery and prolonged antibiotic treatment.

  19. Degradation of Levan by Actinomyces viscosus

    Miller, Chris H.; Somers, Penelope J. B.

    1978-01-01

    Actinomyces viscosus ATCC 15987 was examined for its ability to hydrolyze its own levan. Washed whole cells and an ammonium sulfate fraction from cell-free culture fluids were shown to possess levan hydrolase activity. Analyses of reaction mixtures by gel filtration and thin-layer chromatography demonstrated that the product of levan hydrolysis was free fructose. The cell-associated and extracellular enzyme preparations also hydrolyzed inulin and the levans synthesized by Aerobacter levanicum and Bacillus subtilis. Growth of A. viscosus in media supplemented with 0.1% A. viscosus levan resulted in a 33-fold increase and a 7-fold increase in the specific activities of the respective extracellular and cell-associated enzymes when compared with those from 55 mM glucose cultures. Growth in the presence of 29.2 mM sucrose resulted in a 28-fold increase and a 5-fold increase in the specific activities of the respective enzymes when compared with those from the glucose cultures. The extracellular enzyme exhibited high activity over a wide pH range, with 87 and 89% of its pH 6.0 optimum activity at pH 5.0 and 7.0, respectively. The cell-associated enzyme also exhibited optimum activity at pH 6.0, but this was decreased to 10 and 20% at pH 5.0 and 7.0, respectively. Analysis for the presence of extracellular levan during growth of A. viscosus in sucrose broths demonstrated that peak levan concentrations occurred during the mid-exponential to late-exponential phase of growth followed by a rapid decline in extracellular levan as a result of levan hydrolase activity. Images PMID:32137

  20. Empiema por Actinomyces: el gran simulador Empyema due to Actinomyces: a diagnostic challenge

    Fernando J. Vázquez; Corina Nemirovsky

    2006-01-01

    El derrame pleural aislado, como única manifestación de la actinomicosis es una situación muy rara y un desafío diagnóstico para el clínico, no sólo por su infrecuencia sino por la dificultad técnica para cultivar al gérmen. La típica apariencia microscópica de este bacilo Gram-positivo ramificado en los cultivos suele ser la clave del dianóstico. Se informa un caso de derrame pleural masivo izquierdo por Actinomyces israelii, sin afectación del parénquima pulmonar, de difícil diagnóstico, qu...

  1. Conservation of an Actinomyces viscosus T14V type 1 fimbrial subunit homolog among divergent groups of Actinomyces spp.

    Yeung, M K

    1992-01-01

    The type 1 fimbrial subunit gene of the human Actinomyces viscosus T14V was used as a DNA probe in Southern analyses to detect related DNA sequences in 16 of 30 strains of Actinomyces spp. under conditions of high stringency. The organisms with homology to the DNA probe included two human and six nonhuman A. viscosus, three human and three nonhuman A. naeslundii, and two A. bovis isolates. Homologous DNA sequences were not detected in strains of A. odontolyticus and A. israelii examined in th...

  2. Actinomyces pyogenes septic arthritis in a diabetic farmer.

    Lynch, M

    2012-02-03

    We report a case of septic arthritis and osteomyelitis of the left ankle due to Actinomyces pyogenes in a diabetic farmer. Few confirmed human cases of A. pyogenes infection have been reported, partly because of inadequate identification of this bacterium. Bacteriological characteristics of the organism, which resembles Arcanobacterium haemolyticum, are described with a review of previous case reports.

  3. Oral Actinomyces Species in Health and Disease: Identification, Occurence and Importance of Early Colonization

    Sarkonen, Nanna

    2007-01-01

    The genus Actinomyces consists of a heterogeneous group of gram-positive, mainly facultatively anaerobic or microaerobic rods showing various degrees of branching. In the oral cavity, streptococci and Actinomyces form a fundamental component of the indigenous microbiota, being among initial colonizers in polymicrobial biofilms. The significance of the genus Actinomyces is based on the capability of species to adhere to surfaces such as on teeth and to co-aggregate with other bacteria. Identif...

  4. Transformation of Actinomyces spp. by a gram-negative broad-host-range plasmid.

    Yeung, M K; Kozelsky, C S

    1994-01-01

    The gram-negative broad-host-range vector pJRD215 was transferred by electroporation into strains of Actinomyces viscosus or Actinomyces naeslundii at efficiencies which ranged from 10(2) to 10(7) transformants per microgram of plasmid DNA. The Actinomyces transformants expressed pJRD215-encoded resistance to kanamycin and streptomycin. Moreover, the transforming plasmid DNA had not undergone any deletions or rearrangements, nor had it integrated into the genomes of these strains.

  5. Simultaneous loss of bacteriophage receptor and coaggregation mediator activities in Actinomyces viscosus MG-1.

    Tylenda, C A; Enriquez, E.; Kolenbrander, P. E.; Delisle, A L

    1985-01-01

    Actinomyces bacteriophages were used as tools to study coaggregation between actinomyces and streptococci. Four bacteriophage isolates, phages AV-1, AV-2, AV-3, and 1281, bound to coaggregation group A Actinomyces viscosus and to group E A. naeslundii. No binding to groups B, C, D, or F was observed. Only A. viscosus MG-1 was capable of supporting a productive infection by these phages. Spontaneously occurring bacteriophage-resistant mutants of A. viscosus MG-1 were isolated and were shown to...

  6. Cariogenic Actinomyces Identified with a β-Glucosidase-Dependent Green Color Reaction to Gardenia jasminoides Extract

    Li CHEN; Ma, Lili; Park, No-Hee; Shi, Wenyuan

    2001-01-01

    The oral bacteria Actinomyces naeslundii and Actinomyces viscosus are known to contribute to the initiation and progression of human dental caries, especially root caries. We report that both A. naeslundii and A. viscosus react with a component in the Gardenia jasminoides extract to produce a distinct green product. This green color reaction was found to be dependent on the bacterial β-glucosidase. The reaction is specific for cariogenic actinomyces, and it can detect as few as 104 cells of A...

  7. Actinomyces endogenous endophthalmitis in a cat following multiple dental extractions.

    Westermeyer, Hans D; Ward, Daniel A; Whittemore, Jacqueline C; Lyons, Jeremiah A

    2013-11-01

    An 8-year-old, brachycephalic, mixed breed cat underwent full mouth tooth extractions for the treatment of tooth root abscessation. Subsequently, the cat developed anterior uveitis refractory to topical therapy that eventually necessitated enucleation. Actinomyces species were isolated from both the tooth root abscesses and the anterior chamber after enucleation. Histopathology of the enucleated eye revealed panophthalmitis with abundant intralesional bacteria morphologically consistent with Actinomyces. Between the time of tooth root extraction and enucleation (20 weeks), the cat was diagnosed with hyperthyroidism and treated with oral steroids for inflammatory bowel syndrome. We believe this report represents a rare case of endogenous endophthalmitis secondary to dental disease, possibly precipitated by concurrent immunosuppression. PMID:23281798

  8. Low-grade infection after a total knee arthroplasty caused by Actinomyces naeslundii.

    Hedke, J; Skripitz, R; Ellenrieder, M; Frickmann, H; Köller, T; Podbielski, A; Mittelmeier, W

    2012-08-01

    Here, we present a case of an 85-year-old woman with a low-grade-infection caused by Actinomyces naeslundii after total-knee arthroplasty (TKA) followed by septic loosening. Actinomyces naeslundii was cultured from a tissue sample from the knee joint capsule/synovial tissue obtained after the initial TKA. A review of the literature revealed two cases of periprosthetic infection and another three cases of arthritis due to Actinomyces naeslundii. So far, no standard treatment for periprosthetic infections caused by Actinomyces species has been established. PMID:22556326

  9. Infection of a Hip Prosthesis by Actinomyces naeslundii

    Wüst, Jürg; Steiger, Ulrich; Vuong, Hanh; Zbinden, Reinhard

    2000-01-01

    We present the case of a 77-year-old woman who developed an Actinomyces naeslundii infection of a hip prosthesis. The isolate grew well aerobically with 5% CO2. Possible diagnostic problems may arise in the microbiological laboratory because aerobic growth is not sufficiently accounted for in some of the traditional identification schemes and commercial test kits. Therefore, besides presenting an unusual pathogen in this setting, this report focuses on possible diagnostic problems in the micr...

  10. Genetic and Physiologic Characterization of Urease of Actinomyces naeslundii

    Morou-Bermudez, Evangelia; Burne, Robert A.

    1999-01-01

    Ammonia production from urea by ureolytic oral bacteria is believed to have a significant impact on oral health and the ecological balance of oral microbial populations. In this study we cloned and characterized the urease gene cluster of Actinomyces naeslundii, which is one of the pioneer organisms in the oral cavity and a significant constituent of supragingival and subgingival dental plaque in children and adults. An internal fragment of the ureC gene of A. naeslundii WVU45 was initially a...

  11. Analysis of Urease Expression in Actinomyces naeslundii WVU45

    Morou-Bermudez, Evangelia; Burne, Robert A.

    2000-01-01

    The hydrolysis of urea by ureases of oral bacteria in dental plaque can cause a considerable increase in plaque pH, which can inhibit the development of dental caries. There is also indirect evidence that urea metabolism may promote the formation of calculus and that ammonia release from urea could exacerbate periodontal diseases. Actinomyces naeslundii, an early colonizer of the oral cavity and a numerically significant plaque constituent, demonstrates comparatively low levels of urease acti...

  12. Phosphorylating enzymes involved in glucose fermentation of Actinomyces naeslundii.

    Takahashi, N.; Kalfas, S; Yamada, T.

    1995-01-01

    Enzymatic activities involved in glucose fermentation of Actinomyces naeslundii were studied with glucose-grown cells from batch cultures. Glucose could be phosphorylated to glucose 6-phosphate by a glucokinase that utilized polyphosphate and GTP instead of ATP as a phosphoryl donor. Glucose 6-phosphate was further metabolized to the end products lactate, formate, acetate, and succinate through the Embden-Meyerhof-Parnas pathway. The phosphoryl donor for phosphofructokinase was only PPi. Phos...

  13. Attachment of Actinomyces naeslundii to human buccal epithelial cells.

    Saunders, J M; MILLER, C. H.

    1980-01-01

    A standardized assay was used to measure the attachment of Actinomyces naeslundii ATCC 12104 to washed human buccal epithelial cells. Treatment of the A. naeslundii cells with hyaluronidases, wheat germ lipase, protease, trypsin, heat, or sonic oscillation significantly reduced their ability to attach to epithelial cells. Treatment of the epithelial cells with the above enzymes did not influence the attachment of A. naeslundii. Extraction of A. naeslundii with NaOH also significantly reduced ...

  14. Characterization of the Fructosyltransferase Gene of Actinomyces naeslundii WVU45

    Bergeron, Lori J.; Morou-Bermudez, Evangelia; Burne, Robert A.

    2000-01-01

    Oral actinomycetes produce fructosyltransferase (FTF) enzymes which convert sucrose into polymers of d-fructose, known as levans, and these polymers are thought to contribute to the persistence and virulence of the organisms. A gene encoding FTF was isolated from Actinomyces naeslundii WVU45; the deduced amino acid sequence showed significant similarity to known levansucrases of gram-negative environmental isolates but was less similar to FTFs from gram-positive bacteria. A transcriptional st...

  15. Actinomyces in chronic granulomatous disease: an emerging and unanticipated pathogen

    Reichenbach, J.; Lopatin, U; Mahlaoui, N.; Beovic, B; Siler, U; Zbinden, R.; Seger, R.A.; Galmiche, L; Brousse, N; Kayal, S.; Güngör, T; Blanche, S; Holland, S M

    2009-01-01

    BACKGROUND: Chronic granulomatous disease (CGD) is a rare inherited disease of the phagocyte NADPH oxidase system that causes defective production of toxic oxygen metabolites, impaired bacterial and fungal killing, and recurrent life-threatening infections, mostly by catalase-producing organisms. We report for the first time, to our knowledge, chronic infections with Actinomyces species in 10 patients with CGD. Actinomycosis is a chronic granulomatous condition that commonly manifests as cerv...

  16. Regulation of extracellular slime production by Actinomyces viscosus.

    Ooshima, T; Kuramitsu, H K

    1981-01-01

    Extracellular slime polysaccharides produced two Actinomyces viscosus strains, T14V and T14AV, were compared. In various media containing glucose, T14Av produced abundant extracellular viscous slime polysaccharide, whereas T14V produced lower levels. Furthermore, fractionation of these polysaccharides showed that the two extracellular polysaccharides differed in molecular size and net charge. Since there was a significant difference in the relative abilities of chemically defined medium and c...

  17. Influence of Growth Medium on Adsorption of Streptococcus mutans, Actinomyces viscosus, and Actinomyces naeslundii to Saliva-Treated Hydroxyapatite Surfaces

    Peros, W. J.; Gibbons, R. J.

    1981-01-01

    The influence of the growth medium on the ability of strains of Streptococcus mutans, Actinomyces viscosus and A. naeslundii to attach to saliva-treated hydroxyapatite (S-HA) surfaces was studied. Preliminary experiments indicated that cells of each species harvested in lag, log, and early stationary phases of growth adsorbed comparably to S-HA; thus, early stationary phase cells were used in all subsequent assays. Strains were grown in chemically defined medium (CDM), in CDM supplemented wit...

  18. Differences in the Adsorptive Behavior of Human Strains of Actinomyces viscosus and Actinomyces naeslundii to Saliva-Treated Hydroxyapatite Surfaces

    Qureshi, J V; Gibbons, R. J.

    1981-01-01

    Human strains of Actinomyces viscosus and A. naeslundii differ in the time of their appearance and in their patterns of colonization in the mouth. Strains of these organisms were found to differ in their abilities to adsorb to saliva-treated hydroxyapatite (S-HA) surfaces, thought to mimic the teeth, and these differences parallel their patterns of colonizing the dentition. Thus, strains of A. viscosus tended to adsorb in higher numbers to hydroxyapatite (HA) treated with saliva of older chil...

  19. Actinomyces naeslundii as an agent of pelvic actinomycosis in the presence of an intrauterine device.

    Bonnez, W; Lattimer, G; Mohanraj, N A; Johnson, T. H.

    1985-01-01

    Actinomyces naeslundii is a saprophyte, sometimes a pathogen, of the human oral cavity. Very few extra-oral infections related to this agent have been described. We report the first instance of A. naeslundii as an etiological agent of pelvic actinomycosis in a user of an intrauterine device, an infection so far exclusively attributed to Actinomyces israelii.

  20. Strains of Actinomyces naeslundii and Actinomyces viscosus Exhibit Structurally Variant Fimbrial Subunit Proteins and Bind to Different Peptide Motifs in Salivary Proteins

    Li, Tong; Johansson, Ingegerd; Hay, Donald I.; Strömberg, Nicklas

    1999-01-01

    Oral strains of Actinomyces spp. express type 1 fimbriae, which are composed of major FimP subunits, and bind preferentially to salivary acidic proline-rich proteins (APRPs) or to statherin. We have mapped genetic differences in the fimP subunit genes and the peptide recognition motifs within the host proteins associated with these differential binding specificities. The fimP genes were amplified by PCR from Actinomyces viscosus ATCC 19246, with preferential binding to statherin, and from Act...

  1. Actinomyces naeslundii: A rare cause of chronic purulent canaliculitis.

    Kavitha PRABHU

    2013-04-01

    Full Text Available Chronic canaliculitis is an uncommon disease with a protracted course. Its management is prolonged and difficult. An elderly lady was diagnosed to have left lower chronic purulent canaliculitis. Conservative treatment alone did not effect a complete cure. Canaliculotomy with removal of sulphur granules and canalicular curettage also had to be performed to achieve a permanent cure. Unlike many cases of canaliculitis, this patient presented numerous complications confined to the canaliculus. To the best of our knowledge, this is the first report of Actinomyces naeslundii (A. naeslundii causing chronic purulent canaliculitis and associated complications. A. naeslundii canaliculitis should be considered in the differential diagnosis of chronic conjunctivitis with epiphora.

  2. Actinomyces viscosus Isolation from Skin Lesions in Iran

    R Daie

    2009-06-01

    Full Text Available "nThis paper presents a case-report of cutaneous actinomycosis due to Actinomyces viscosus in a 22 year old man, hospital staff from Tehran with multiple fistulous tracts in his right hand and a history of skin injury due to thorn of plant. Diagnosis was based on the observation of gram positive coccoid, diphtheroid and long branching filaments in direct examination of pus from fistulous tracts and isolation of microorganism in thioglycolate and Brain Heart Infusion (BHI agar media in an­aerobic conditions and some physiologic tests. Treatment of lesion was down with doxycyclin and penicillin 3 months and healing was acquired.

  3. Application of MLST and pilus gene sequence comparisons to investigate the population structures of Actinomyces naeslundii and Actinomyces oris.

    Uta Henssge

    Full Text Available Actinomyces naeslundii and Actinomyces oris are members of the oral biofilm. Their identification using 16S rRNA sequencing is problematic and better achieved by comparison of metG partial sequences. A. oris is more abundant and more frequently isolated than A. naeslundii. We used a multi-locus sequence typing approach to investigate the genotypic diversity of these species and assigned A. naeslundii (n = 37 and A. oris (n = 68 isolates to 32 and 68 sequence types (ST, respectively. Neighbor-joining and ClonalFrame dendrograms derived from the concatenated partial sequences of 7 house-keeping genes identified at least 4 significant subclusters within A. oris and 3 within A. naeslundii. The strain collection we had investigated was an under-representation of the total population since at least 3 STs composed of single strains may represent discrete clusters of strains not well represented in the collection. The integrity of these sub-clusters was supported by the sequence analysis of fimP and fimA, genes coding for the type 1 and 2 fimbriae, respectively. An A. naeslundii subcluster was identified with both fimA and fimP genes and these strains were able to bind to MUC7 and statherin while all other A. naeslundii strains possessed only fimA and did not bind to statherin. An A. oris subcluster harboured a fimA gene similar to that of Actinomyces odontolyticus but no detectable fimP failed to bind significantly to either MUC7 or statherin. These data are evidence of extensive genotypic and phenotypic diversity within the species A. oris and A. naeslundii but the status of the subclusters identified here will require genome comparisons before their phylogenic position can be unequivocally established.

  4. Actinomyces hyovaginalis-associated lymphadenitis in a Nubian goat.

    Schumacher, Vanessa L; Hinckley, Lynn; Gilbert, Kelly; Risatti, Guillermo R; Londoño, Alfredo Sanchez; Smyth, Joan A

    2009-05-01

    A 6-year-old Nubian goat with a history of progressive weight loss and cough was presented for necropsy. The goat tested negative for antibodies to caseous lymphadenitis and caprine arthritis and encephalitis by hemagglutination inhibition assay and enzyme-linked immunosorbent assay, respectively. Postmortem examination revealed marked enlargement and, with histopathology, a fibrinopurulent necrotizing lymphadenitis of a tracheobronchial lymph node, with an appearance similar to that reported in cases of caseous lymphadenitis. An organism characterized by molecular methods as Actinomyces hyovaginalis was isolated together with Staphylococcus spp. and Streptococcus spp. from the lesion. No Corynebacterium pseudotuberculosis was recovered. To the authors' knowledge, this is the first isolation of A. hyovaginalis from a goat. Although the exact contribution of A. hyovaginalis to the lesion remains to be established, this case demonstrates that A. hyovaginalis should be considered in cases of caseous lymphadenitis-type lesions, especially when C. pseudotuberculosis has been excluded. PMID:19407095

  5. ACTINOMYCES NAESLUNDII, A PREVIOUSLY UNDOCUMENTED CAUSE OF INFECTIVE ENDOCARDITIS; WITH LITERARY REVIEW

    Loren Garrison Morgan

    2014-01-01

    Full Text Available Actinomycotic endocarditis is a rare disease with only 18 documented cases to date. Most of these cases are sub-acute or chronic infections and usually lack the stigmata of classic endocarditis. This article reviews the details of previously published reports of endocarditis due to various species of actinomyces, along with consensus opinion on diagnosis and treatment. We also present our unique case of Actinomyces naeslundii infective endocarditis, the first case ever attributed to this organism in medical literature.

  6. ACTINOMYCES NAESLUNDII ISOLATED FROM BONE MARROW BIOPSIES OBTAINED FROM PATIENTS WITH MALIGNANT LYMPHORETICULAR DISEASES

    I.Mobedi

    1981-08-01

    Full Text Available Different types of Actinomyces spp isolated from the oral cavity of human in healthy as well as in pathological state. Internally it is only found in association with pathological organs. Recently Actinomyces naeslundii has been isolated from blood culture of a leukemic patient. Present studies indicate the association of this microorganism with cells obtained from bone marrow by punction in more than 40 percent of patients of patients with malignant lymphoreticular disease.

  7. Antibody Response to Actinomyces Antigen and Dental Caries Experience: Implications for Caries Susceptibility

    Levine, Martin; Owen, Willis L; Avery, Kevin T

    2005-01-01

    Fluoridated dentifrices reduce dental caries in subjects who perform effective oral hygiene. Actinomyces naeslundii increases in teeth-adherent microbial biofilms (plaques) in these subjects, and a well-characterized serum immunoglobulin G (IgG) antibody response (Actinomyces antibody [A-Ab]) is also increased. Other studies suggest that a serum IgG antibody response to streptococcal d-alanyl poly(glycerophosphate) (S-Ab) may indicate caries experience associated strongly with gingival health...

  8. ACTINOMYCES NAESLUNDII ISOLATED FROM BONE MARROW BIOPSIES OBTAINED FROM PATIENTS WITH MALIGNANT LYMPHORETICULAR DISEASES

    Mobedi, I; J.Vandyoussefi; H.Rassa; HA.Fardin

    1981-01-01

    Different types of Actinomyces spp isolated from the oral cavity of human in healthy as well as in pathological state. Internally it is only found in association with pathological organs. Recently Actinomyces naeslundii has been isolated from blood culture of a leukemic patient. Present studies indicate the association of this microorganism with cells obtained from bone marrow by punction in more than 40 percent of patients of patients with malignant lymphoreticular disease.

  9. ACTINOMYCES NAESLUNDII, A PREVIOUSLY UNDOCUMENTED CAUSE OF INFECTIVE ENDOCARDITIS; WITH LITERARY REVIEW

    Loren Garrison Morgan; Ashley L. Davis; Paul Poommipanit; Yasir Ahmed

    2014-01-01

    Actinomycotic endocarditis is a rare disease with only 18 documented cases to date. Most of these cases are sub-acute or chronic infections and usually lack the stigmata of classic endocarditis. This article reviews the details of previously published reports of endocarditis due to various species of actinomyces, along with consensus opinion on diagnosis and treatment. We also present our unique case of Actinomyces naeslundii infective endocarditis, the first case ever attributed to this orga...

  10. Putative glycoprotein and glycolipid polymorphonuclear leukocyte receptors for the Actinomyces naeslundii WVU45 fimbrial lectin.

    Sandberg, A L; Ruhl, S; Joralmon, R A; Brennan, M J; Sutphin, M J; Cisar, J O

    1995-01-01

    Recognition of receptors on sialidase-treated polymorphonuclear leukocytes (PMNs) by the Gal/GalNAc lectin associated with the type 2 fimbriae of certain strains of actinomyces results in activation of the PMNs, phagocytosis, and destruction of the bacteria. In the present study, plant lectins were utilized as probes to identify putative PMN receptors for the actinomyces lectin. The Gal-reactive lectin from Ricinus communis (RCAI), the Gal/GalNAc-reactive lectins from R. communis (RCAII) and ...

  11. Lectin-dependent attachment of Actinomyces naeslundii to receptors on epithelial cells.

    Brennan, M J; Cisar, J O; Vatter, A. E.; Sandberg, A L

    1984-01-01

    The adherence of Actinomyces naeslundii WVU45 to monolayer cultures of human epithelial cell lines was mediated by the lactose-sensitive fimbriae (type 2) of strain WVU45. The attachment of Actinomyces viscosus T14V, which has both types 1 and 2 fimbriae, was approximately half that of A. naeslundii, and only minimal attachment of A. naeslundii and A. viscosus mutants lacking type 2 fimbriae was detected. The adherence of strain WVU45 was enhanced two- to threefold by neuraminidase treatment ...

  12. Type 2 fimbrial lectin-mediated phagocytosis of oral Actinomyces spp. by polymorphonuclear leukocytes.

    Sandberg, A L; Mudrick, L L; Cisar, J O; Brennan, M J; Mergenhagen, S. E.; Vatter, A. E.

    1986-01-01

    Phagocytosis of Actinomyces viscosus T14V and A. naeslundii WVU45 by human polymorphonuclear leukocytes in the absence of antibody or complement was mediated by the lectin associated with the type 2 fimbriae of these bacteria. This effect was markedly enhanced by exogenous sialidase, an enzyme also secreted by these actinomyces. Since sialidase treatment of the bacteria did not result in increased phagocytosis, this enzyme presumably acts by unmasking receptors for the fimbrial lectin on phag...

  13. Isolation and characterization of oral Actinomyces strain from patients with periodontal disease

    Eshraghi S; Salari MH; Kadkhoda Z.; Yaghmaei Sh.

    2001-01-01

    "nAbstract: Actinomyces species are normal residents of the mouth cavity, gastrointestinal tract and female genital tract. The genus consists of gram-positive bacteria, strictly anaerobic or microaerophilic. The bacteria are opportunists with a low virulence potential that cause actinomycosis only when the normal mucosal barriers are disrupted. The main purpose of this study was the isolation of Actinomyces strains and determining of their role in periodontal diseases. The present study ...

  14. Isolation and Expression of the Lysis Genes of Actinomyces naeslundii Phage Av-1

    Delisle, Allan L.; Barcak, Gerard J.; Guo, Ming

    2006-01-01

    Like most gram-positive oral bacteria, Actinomyces naeslundii is resistant to salivary lysozyme and to most other lytic enzymes. We are interested in studying the lysins of phages of this important oral bacterium as potential diagnostic and therapeutic agents. To identify the Actinomyces phage genes encoding these species-specific enzymes in Escherichia coli, we constructed a new cloning vector, pAD330, that can be used to enrich for and isolate phage holin genes, which are located adjacent t...

  15. Rapid identification of oral Actinomyces species cultivated from subgingival biofilm by MALDI-TOF-MS

    Catalina S. Stingu

    2015-01-01

    Full Text Available Background: Actinomyces are a common part of the residential flora of the human intestinal tract, genitourinary system and skin. Isolation and identification of Actinomyces by conventional methods is often difficult and time consuming. In recent years, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS has become a rapid and simple method to identify bacteria. Objective: The present study evaluated a new in-house algorithm using MALDI-TOF-MS for rapid identification of different species of oral Actinomyces cultivated from subgingival biofilm. Design: Eleven reference strains and 674 clinical strains were used in this study. All the strains were preliminarily identified using biochemical methods and then subjected to MALDI-TOF-MS analysis using both similarity-based analysis and classification methods (support vector machine [SVM]. The genotype of the reference strains and of 232 clinical strains was identified by sequence analysis of the 16S ribosomal RNA (rRNA. Results: The sequence analysis of the 16S rRNA gene of all references strains confirmed their previous identification. The MALDI-TOF-MS spectra obtained from the reference strains and the other clinical strains undoubtedly identified as Actinomyces by 16S rRNA sequencing were used to create the mass spectra reference database. Already a visual inspection of the mass spectra of different species reveals both similarities and differences. However, the differences between them are not large enough to allow a reliable differentiation by similarity analysis. Therefore, classification methods were applied as an alternative approach for differentiation and identification of Actinomyces at the species level. A cross-validation of the reference database representing 14 Actinomyces species yielded correct results for all species which were represented by more than two strains in the database. Conclusions: Our results suggest that a combination of MALDI

  16. Iron-dependent gene expression in Actinomyces oris

    Matthew P. Mulé

    2015-12-01

    Results: When A. oris was grown under iron-limiting conditions, the genes encoding iron/siderophore transporters fetA and sidD showed increased expression. One of these genes (sidD was mutated, and the sidD::Km strain exhibited a 50% reduction in growth in late log and stationary phase cells in media that contained iron. This growth defect was restored when the sidD gene was provided in a complemented strain. We were able to isolate the AmdR-encoding gene in seven clinical isolates of Actinomyces. When these protein sequences were aligned to the laboratory strain, there was a high degree of sequence similarity. Conclusions: The growth of the sidD::Km mutant in iron-replete medium mirrored the growth of the wild-type strain grown in iron-limiting medium, suggesting that the sidD::Km mutant was compromised in iron uptake. The known iron regulator AmdR is well conserved in clinical isolates of A. oris. This work provides additional insight into iron metabolism in this important oral microbe.

  17. Isolation and characterization of oral Actinomyces strain from patients with periodontal disease

    Eshraghi S.

    2001-09-01

    Full Text Available "nAbstract: Actinomyces species are normal residents of the mouth cavity, gastrointestinal tract and female genital tract. The genus consists of gram-positive bacteria, strictly anaerobic or microaerophilic. The bacteria are opportunists with a low virulence potential that cause actinomycosis only when the normal mucosal barriers are disrupted. The main purpose of this study was the isolation of Actinomyces strains and determining of their role in periodontal diseases. The present study was carried out on 100 patients with periodontal diseases referred to the Periodontic Department of Faculty of Dentistry. The sampling was done in 6 months with isolation of oral Actinomyces from microbial plaque and periodontal pocket. The samples were selected based on the following criteria: periodontal plaque with deep pocket (>3 mm, no antibiotic therapy for a period of at least two weeks, and lack of systemic diseases. One strain of Actinomyces viscosus and two strains of Actinomyces naeslundii were isolated from the patients with gingivitis and periodontitis. Of the 100 patients with gingivitis and periodontitis, aged between 18-57 years old, 46% were males and 54% were females. The peak incidence of the diseases (35% was in the third age group (31-40 and the lowest incidence (10% was in the first age group (<20. Forty patients (40% complained of gingival disease and its bleeding with lower incidence of (42.5% in female.

  18. Spontaneous Bacterial Peritonitis due to Actinomyces Mimicking a Perforation of the Proximal Jejunum.

    Eenhuis, Louise L; de Lange, Marleen E; Samson, Anda D; Busch, Olivier R C

    2016-01-01

    BACKGROUND Pelvic-abdominal actinomycosis is a rare chronic condition caused by an anaerobic, gram-negative rod-shaped commensal bacterium of the Actinomyces species. When Actinomyces becomes pathogenic, it frequently causes a chronic infection with granulomatous abscess formation with pus. Due to diversity in clinical and radiological presentation, actinomycosis can easily be mistaken for several other conditions. Peritonitis without preceding abscess formation caused by Actinomyces species has been described in only few cases before in literature. CASE REPORT We report a case of spontaneous pelvic-abdominal peritonitis with presence of pneumoperitoneum and absence of preceding abscesses due to acute actinomycosis mimicking a perforation of the proximal jejunum in a 42-year-old female with an intra-uterine contraceptive device in place. Explorative laparotomy revealed 2 liters of odorless pus but no etiological explanation for the peritonitis. The intra-uterine contraceptive device was removed. Cultivation showed growth of Actinomyces turicensis. The patient was successfully treated with penicillin. CONCLUSIONS In the case of primary bacterial peritonitis or lower abdominal pain without focus in a patient with an intra-uterine device in situ, Actinomyces should be considered as a pathogen. PMID:27561364

  19. Actinomyces naeslundii and Eikenella corrodens as rare causes of liver abscesses.

    Jaqua, Nathan Thomas; Smith, Adam J; Shin, Terry T; Jahanmir, Jay

    2013-01-01

    A 48-year-old man with an unremarkable medical history was admitted with vague conditions of fever, chills, myalgias and malaise. Physical examination was remarkable for only scleral icterus. Laboratory evaluation revealed elevated aminotransferases, alkaline phosphatase and bilirubin. Imaging demonstrated two masses in the right lobe of his liver, which were ultimately drained and cultures demonstrated Actinomyces and Eikenella. He continued to have fever on broad-spectrum antibiotics until catheter drainage of the abscesses was performed. He was eventually discharged in improved condition on amoxicillin-clavulanate. His aminotransferases, alkaline phosphatase and bilirubin continued to improve and he remained afebrile and asymptomatic. A repeat CT 2 months after discharge demonstrated resolution of the abscesses. Actinomyces and Eikenella are rare causes of liver abscesses and treatment requires drainage and an extended course of antibiotics. The polymicrobial character typical of liver abscesses makes antibiotic therapy challenging when cultures reveal rare organisms such as Actinomyces and Eikenella. PMID:23867879

  20. Sortase-Catalyzed Assembly of Distinct Heteromeric Fimbriae in Actinomyces naeslundii▿

    Mishra, Arunima; Das, Asis; Cisar, John O.; Ton-That, Hung

    2007-01-01

    Two types of adhesive fimbriae are expressed by Actinomyces; however, the architecture and the mechanism of assembly of these structures remain poorly understood. In this study we characterized two fimbrial gene clusters present in the genome of Actinomyces naeslundii strain MG-1. By using immunoelectron microscopy and biochemical analysis, we showed that the fimQ-fimP-srtC1-fimR gene cluster encodes a fimbrial structure (designated type 1) that contains a major subunit, FimP, forming the sha...

  1. Actinomyces and Nocardia infections in chronic granulomatous disease

    Shahindokht Bassiri-Jahromi

    2011-01-01

    Full Text Available Objective : Chronic granulomatous disease (CGD is an inherited disorder of the Nicotinamide adenine dinucleotide phosphate reduced oxidase complex characterized by recurrent bacterial and fungal infections. Disseminated infection by combination of opportunistic agents is being increasingly reported in CGD patients. We presented in the retrospective review of medical records, the etiology, presentation, clinical characteristics the infections detected, predisposing condition and outcome of nocardiosis and actinomycosis involved in a group of pediatric patients diagnosed with CGD. Materials and Methods: The clinical presentation of CGD-related infections was reviewed retrospectively from the medical records of all 12 patients with CGD. We studied respectively 12 patients between 2001 and 2008, and we analyzed two pediatric patients with CGD who acquired Nocardia and Actinomyces infections, and their clinical and microbiological characteristics were described. The material for investigations was collected from scrapings, crusts, pus from subcutaneous abscesses or exudation from sinus tracts, surgical debridement, and biopsy specimens. The microbiological diagnosis was determined by biochemical tests, histology, microscopy, and culture of clinical samples. Results: The medical records of 12 diagnosed CGD patients with suspected nocardiosis or actinomycosis were reviewed. One patient was diagnosed with actinomycosis and one patient with nocardiosis. Patients consisted of seven males and five females with ranging ages of 3 to 18 years. Nocardiosis and actinomycosis isolated in the two patients were confirmed by histology and culture methods. Neutrophil oxidative burst were absent (NBT=0 in both patients. The most common manifestations of CGD due to fungal infections, actinomycosis, and nocardiosis were osteomyelitis (42.8%, pulmonary infections (28.6%, lymphadenopathy (14.3%, and skin involvement (14.3% during their illness. Conclusion: Nocardiosis

  2. Effect of Biofilm Growth on Expression of Surface Proteins of Actinomyces naeslundii Genospecies 2

    Paddick, James S.; Brailsford, Susan R; Rao, Susmitha; Soares, Renata F.; Kidd, Edwina A. M.; Beighton, David; Homer, Karen A.

    2006-01-01

    The predominant surface proteins of biofilm and planktonic Actinomyces naeslundii, a primary colonizer of the tooth surface, were examined. Seventy-nine proteins (the products of 52 genes) were identified in biofilm cells, and 30 of these, including adhesins, chaperones, and stress-response proteins, were significantly up-regulated relative to planktonic cells.

  3. Successful treatment of mitral valve endocarditis in a dog associated with 'Actinomyces canis-like' infection.

    Balakrishnan, N; Alexander, K; Keene, B; Kolluru, S; Fauls, M L; Rawdon, I; Breitschwerdt, E B

    2016-09-01

    Infective endocarditis, an inflammation of the endocardial surface due to invasion by an infectious agent, is more common in middle sized to large breed dogs. We herein report a case of mitral valve endocarditis in a 9-year-old male-castrated Weimaraner caused by an Actinomyces canis-like bacterium, not previously reported in association with infection in dogs. PMID:27364088

  4. Sequence analyses of fimbriae subunit FimA proteins on Actinomyces naeslundii genospecies 1 and 2 and Actinomyces odontolyticus with variant carbohydrate binding specificities

    Persson Karina; Birve Anna; Öhman Ulla; Hallberg Kristina; Drobni Mirva; Johansson Ingegerd; Strömberg Nicklas

    2006-01-01

    Abstract Background Actinomyces naeslundii genospecies 1 and 2 express type-2 fimbriae (FimA subunit polymers) with variant Galβ binding specificities and Actinomyces odontolyticus a sialic acid specificity to colonize different oral surfaces. However, the fimbrial nature of the sialic acid binding property and sequence information about FimA proteins from multiple strains are lacking. Results Here we have sequenced fimA genes from strains of A.naeslundii genospecies 1 (n = 4) and genospecies...

  5. Demonstration of Actinomyces and Arachnia species in cervicovaginal smears by direct staining with species-specific fluorescent-antibody conjugate.

    Pine, L; Malcolm, G B; Curtis, E M; Brown, J. M.

    1981-01-01

    For direct observation of microaerophilic actinomycetes by fluorescent antibody, a procedure was developed in which pepsin treatment and rhodamine conjugate of normal serum were used to reduce nonspecific staining in cervicovaginal smears. Actinomyces israelii, Actinomyces naeslundii, and Arachnia propionica were observed in cervicovaginal smears from women who did use and who did not use an intrauterine contraceptive device. A. israelii was found more commonly in women with an intrauterine c...

  6. Characterization of Streptococcus gordonii (S. sanguis) PK488 adhesin-mediated coaggregation with Actinomyces naeslundii PK606.

    Kolenbrander, P. E.; Andersen, R N

    1990-01-01

    Intergeneric coaggregation of Streptococcus gordonii (S. sanguis) PK488 and Actinomyces naeslundii PK606 was studied by using coaggregation-defective (Cog-) mutants of both strains. A streptococcal protein of 38 kilodaltons was identified with anti-S. gordonii serum absorbed with Cog- cells of the streptococcus. Absorbed immunoglobulin G specifically blocked coaggregation of the streptococcus-actinomyces pair but did not affect the coaggregation of the streptococcus with other coaggregation p...

  7. Role of Surface Fimbriae (Fibrils) in the Adsorption of Actinomyces Species to Saliva-Treated Hydroxyapatite Surfaces

    Clark, William B.; Webb, Eldon L.; Wheeler, Timothy T.; Fischlschweiger, Werner; Birdsell, Dale C.; Mansheim, Bernard J.

    1981-01-01

    We studied the adsorption, morphological, and serological characteristics of selected Actinomyces and related species. Evaluation of uranyl acetate-stained cells by electron microscopy revealed wide variations among strains in the frequency of surface fimbriae. These variations did not always correlate with the percent adsorption to saliva-treated hydroxyapatite of the various Actinomyces strains. However, two strains of Rothia dentocariosa possessing no surface fimbriae and five strains of A...

  8. Identification of Polymorphonuclear Leukocyte and HL-60 Cell Receptors for Adhesins of Streptococcus gordonii and Actinomyces naeslundii

    Ruhl, Stefan; Cisar, John O.; Sandberg, Ann L.

    2000-01-01

    Interactions of oral streptococci and actinomyces with polymorphonuclear leukocytes (PMNs), mediated by sialic acid- and Gal/GalNAc-reactive adhesins, respectively, result in activation of the PMNs and thereby may contribute to the initiation of oral inflammation. Sialidase treatment of PMNs or HL-60 cells abolished adhesion of Streptococcus gordonii but was required for adhesion of Actinomyces naeslundii. The same effects of sialidase were noted for adhesion of these bacteria to a major 150-...

  9. Different Type 1 Fimbrial Genes and Tropisms of Commensal and Potentially Pathogenic Actinomyces spp. with Different Salivary Acidic Proline-Rich Protein and Statherin Ligand Specificities

    Li, Tong; Khah, Massoud Kheir; Slavnic, Snjezana; Johansson, Ingegerd; Strömberg, Nicklas

    2001-01-01

    Actinomyces spp. exhibit type 1 fimbria-mediated adhesion to salivary acidic proline-rich proteins (PRPs) and statherin ligands. Actinomyces spp. with different animal and tissue origins belong to three major adhesion types as relates to ligand specificity and type 1 fimbria genes. (i) In preferential acidic-PRP binding, strains of Actinomyces naeslundii genospecies 1 and 2 from human and monkey mouths displayed at least three ligand specificities characterized by preferential acidic-PRP bind...

  10. Purification and characterization of surface fibrils from taxonomically typical Actinomyces viscosus WVU627.

    Masuda, N.; Ellen, R P; Grove, D A

    1981-01-01

    Fibrils of Actinomyces viscosus WVU627 (numerical taxonomy cluster 1) were obtained by homogenization and purified by ultrafiltration, ammonium sulfate precipitations, gel filtration, and ion-exchange chromatography. Electron microscopy and resolution of a single band by sodium dodecyl sulfate-polyacrylamide gel electrophoresis attested to the purity of the preparation. Purified fibrils were composed mainly of protein; small quantities of carbohydrate and phosphorus were detected. Immunoelect...

  11. Relationships among Actinomyces naeslundii (A. viscosus) Bacteriophages Isolated from Sewage and the Oral Cavity

    Delisle, Allan L.; Donkersloot, Jacob A.

    2011-01-01

    Several lytic phages of Actinomyces naeslundii genospecies 2 (formerly A. viscosus) have been isolated from sewage and from dental plaque. To define the relationships between these phages and ultimately to assess their role in the ecology of the human oral cavity, 13 phages isolated from these two environments were purified and their biochemical properties compared. Five small, short-tailed phages, isolated from sewage over the course of several years (Av-1, Av-2, Av-3, 1281, and BF307) were ...

  12. Role of hydrogen peroxidein competition and cooperation between Streptococcus gordonii and Actinomyces naeslundii

    Jakubovics, Nicholas S.; Gill, Steven R.; Vickerman, M. Margaret; Kolenbrander, Paul E.

    2008-01-01

    In dental plaque α-haemolytic streptococci, including Streptococcus gordonii, are considered beneficial for oral health. These organisms produce hydrogen peroxide (H2O2) at concentrations sufficient to kill many oral bacteria. Streptococci do not produce catalase yet tolerate H2O2. We recently demonstrated that coaggregation with Actinomyces naeslundii stabilizes arginine biosynthesis in S. gordonii. Protein arginine residues are sensitive to oxidation by H2O2. Here, the ability of A. naeslun...

  13. Antiaggregation potential of berry fractions against pairs of Streptococcus mutans with Fusobacterium nucleatum or Actinomyces naeslundii

    Riihinen, Kaisu Ristiina; Ryynanen, Anu; Toivanen, Marko; Kononen, Eija; Torronen, Riitta; Tikkanen-Kaukanen, Carina

    2010-01-01

    Abstract Coaggregation is an interspecies adhesion process which is central to the development of dental plaque. Here we studied the antiaggregation effect and the composition of the soluble solids in the berry juice molecular size fractions [100 kDa fraction (FIII)] derived from apple, bilberry, blackcurrant, cloudberry, crowberry, and lingonberry. We investigated their ability to inhibit and reverse coaggregation of Streptococcus mutans with Fusobacterium nucleatum or Actinomyces...

  14. Coaggregation-Mediated Interactions of Streptococci and Actinomyces Detected in Initial Human Dental Plaque

    Palmer, JR; Gordon, Sharon M.; Cisar, John O.; Kolenbrander, Paul E.

    2003-01-01

    Streptococci and actinomyces that initiate colonization of the tooth surface frequently coaggregate with each other as well as with other oral bacteria. These observations have led to the hypothesis that interbacterial adhesion influences spatiotemporal development of plaque. To assess the role of such interactions in oral biofilm formation in vivo, antibodies directed against bacterial surface components that mediate coaggregation interactions were used as direct immunofluorescent probes in ...

  15. Roles of Fructosyltransferase and Levanase-Sucrase of Actinomyces naeslundii in Fructan and Sucrose Metabolism

    Bergeron, Lori J.; Burne, Robert A.

    2001-01-01

    The ability of Actinomyces naeslundii to convert sucrose to extracellular homopolymers of fructose and to catabolize these types of polymers is suspected to be a virulence trait that contributes to the initiation and progression of dental caries and periodontal diseases. Previously, we reported on the isolation and characterization of the gene, ftf, encoding the fructosyltransferase (FTF) of A. naeslundii WVU45. Allelic exchange mutagenesis was used to inactivate ftf, revealing that FTF-defic...

  16. Cloning and nucleotide sequence of a gene for Actinomyces naeslundii WVU45 type 2 fimbriae.

    Yeung, M K; Cisar, J O

    1988-01-01

    A genomic library of Actinomyces naeslundii WVU45 DNA in Escherichia coli was screened for antigen expression with rabbit antibody against A. naeslundii fimbriae. Western blotting (immunoblotting) of one recombinant clone carrying a 13.8-kilobase-pair insert revealed a 59-kilodalton (kDa) immunoreactive protein. A protein of similar electrophoretic mobility was detected from the isolated fimbrial antigen. Expression of the 59-kDa cloned protein in E. coli was directed by a promoter from the i...

  17. Actinomyces naeslundii and Eikenella corrodens as rare causes of liver abscesses

    Jaqua, Nathan Thomas; Smith, Adam J.; Shin, Terry T; Jahanmir, Jay

    2013-01-01

    A 48-year-old man with an unremarkable medical history was admitted with vague conditions of fever, chills, myalgias and malaise. Physical examination was remarkable for only scleral icterus. Laboratory evaluation revealed elevated aminotransferases, alkaline phosphatase and bilirubin. Imaging demonstrated two masses in the right lobe of his liver, which were ultimately drained and cultures demonstrated Actinomyces and Eikenella. He continued to have fever on broad-spectrum antibiotics until ...

  18. Recognition of immunoglobulin A1 by oral actinomyces and streptococcal lectins.

    Ruhl, S; Sandberg, A L; Cole, M. F.; Cisar, J O

    1996-01-01

    Actinomyces naeslundii and Streptococcus gordonii, oral bacteria that possess Gal/GalNAc- and sialic acid-reactive lectins, respectively, were adherent to immobilized secretory immunoglobulin A (IgA) and two IgA1 myeloma proteins but not to two IgA2 myeloma proteins. Apparently, O-linked oligosaccharides at the hinge region of the IgA1 heavy chain are receptors for lectin-mediated adhesion of these bacteria.

  19. Exclusive presence of lactose-sensitive fimbriae on a typical strain (WVU45) of Actinomyces naeslundii.

    Cisar, J O; David, V. A.; Curl, S H; Vatter, A. E.

    1984-01-01

    Lactose-sensitive fimbriae were identified as the only fimbriae present on Actinomyces naeslundii WVU45 (ATCC 12104). A single antigen reactive with antiserum against WVU45 cells was detected by cross immunoelectrophoresis of isolated fimbriae, and a monospecific antiserum against this antigen reacted with all fimbriae observed on the bacterial surface by immunoelectron microscopy. Moreover, the loss of one cell surface antigen by a spontaneous mutant of A. naeslundii WVU45 (WVU45M), isolated...

  20. Super Infection of An Ovarian Dermoid Cyst with Actinomyces in An Infertile Woman

    Saghar Salehpour; Azadeh Akbari Sene

    2013-01-01

    We present super infection of an ovarian dermoid cyst with actinomyces in an infertile patient. This is a case-report study for evaluation a couple with male factor infertility, who was a good candidate for intracytoplasmic sperm injection (ICSI), while a 10 cm dermoid cyst was found in the woman’s right ovary. Patient complained of pelvic pain, intermittent fever, dysmenorrhea, and dyspareunia. The cyst was extracted using laparoscopy, whilst in histopathological examination, an actinomycosi...

  1. Adhesion of Actinomyces viscosus to Porphyromonas (Bacteroides) gingivalis-coated hexadecane droplets.

    Rosenberg, M; Buivids, I A; Ellen, R P

    1991-01-01

    Interbacterial adhesion (coadhesion) is considered a major determinant of dental plaque ecology. In this report, we studied several aspects of the adhesion of Porphyromonas (Bacteroides) gingivalis to hexadecane in order to use the liquid hydrocarbon as a convenient substratum for coadhesion assays. Washed suspensions of hydrophobic P. gingivalis 2561 cells were vortexed with hexadecane to yield highly stable cell-coated droplets. Kinetics of coadhesion between Actinomyces viscosus cells and ...

  2. Glucose Uptake by Streptococcus mutans, Streptococcus mitis, and Actinomyces viscosus in the Presence of Human Saliva

    Germaine, Greg, R.; Tellefson, Lois M.

    1982-01-01

    Glucose uptake was examined by using whole-cell suspensions of Streptococcus mutans (strains BHT, Ingbritt, and GS-5), Streptococcus mitis (strains 9811 and 72×41), and Actinomyces viscosus (strains T6 and WVU626) incubated for up to 90 min in 0 to 82% (vol/vol) human whole salivary supernatant. Glucose uptake by the S. mutans strains was completely inhibited at all saliva concentrations. Dithiothreitol (DTT), present during saliva incubation, prevented saliva inhibition. Glucose uptake was a...

  3. Characterization of the binding of Actinomyces naeslundii (ATCC 12104) and Actinomyces viscosus (ATCC 19246) to glycosphingolipids, using a solid-phase overlay approach

    Stroemberg, N.K.; Karlsson, K.A. (Univ. of Goeteborg (Sweden))

    1990-07-05

    Actinomyces naeslundii (ATCC 12104) and Actinomyces viscosus (ATCC 19246) were radiolabeled externally (125I) or metabolically (35S) and analyzed for their ability to bind glycosphingolipids separated on thin layer chromatograms or coated in microtiter wells. Two binding properties were found and characterized in detail. (i) Both bacteria showed binding to lactosylceramide (LacCer) in a fashion similar to bacteria characterized earlier. The activity of free LacCer was dependent on the ceramide structure; species with 2-hydroxy fatty acid and/or a trihydroxy base were positive, while species with nonhydroxy fatty acid and a dihydroxy base were negative binders. Several glycolipids with internal lactose were active but only gangliotriaosylceramide and gangliotetraosylceramide were as active as free LacCer. The binding to these three species was half-maximal at about 200 ng of glycolipid and was not blocked by preincubation of bacteria with free lactose or lactose-bovine serum albumin. (ii) A. naeslundii, unlike A. viscosus, showed a superimposed binding concluded to be to terminal or internal GalNAc beta and equivalent to a lactose-inhibitable specificity previously analyzed by other workers. Terminal Gal beta was not recognized in several glycolipids, although free Gal and lactose were active as soluble inhibitors. The binding was half-maximal at about 10 ng of glycolipid. A glycolipid mixture prepared from a scraping of human buccal epithelium contained an active glycolipid with sites for both binding specificities.

  4. Characterization of the binding of Actinomyces naeslundii (ATCC 12104) and Actinomyces viscosus (ATCC 19246) to glycosphingolipids, using a solid-phase overlay approach

    Actinomyces naeslundii (ATCC 12104) and Actinomyces viscosus (ATCC 19246) were radiolabeled externally (125I) or metabolically (35S) and analyzed for their ability to bind glycosphingolipids separated on thin layer chromatograms or coated in microtiter wells. Two binding properties were found and characterized in detail. (i) Both bacteria showed binding to lactosylceramide (LacCer) in a fashion similar to bacteria characterized earlier. The activity of free LacCer was dependent on the ceramide structure; species with 2-hydroxy fatty acid and/or a trihydroxy base were positive, while species with nonhydroxy fatty acid and a dihydroxy base were negative binders. Several glycolipids with internal lactose were active but only gangliotriaosylceramide and gangliotetraosylceramide were as active as free LacCer. The binding to these three species was half-maximal at about 200 ng of glycolipid and was not blocked by preincubation of bacteria with free lactose or lactose-bovine serum albumin. (ii) A. naeslundii, unlike A. viscosus, showed a superimposed binding concluded to be to terminal or internal GalNAc beta and equivalent to a lactose-inhibitable specificity previously analyzed by other workers. Terminal Gal beta was not recognized in several glycolipids, although free Gal and lactose were active as soluble inhibitors. The binding was half-maximal at about 10 ng of glycolipid. A glycolipid mixture prepared from a scraping of human buccal epithelium contained an active glycolipid with sites for both binding specificities

  5. Sequence analyses of fimbriae subunit FimA proteins on Actinomyces naeslundii genospecies 1 and 2 and Actinomyces odontolyticus with variant carbohydrate binding specificities

    Persson Karina

    2006-05-01

    Full Text Available Abstract Background Actinomyces naeslundii genospecies 1 and 2 express type-2 fimbriae (FimA subunit polymers with variant Galβ binding specificities and Actinomyces odontolyticus a sialic acid specificity to colonize different oral surfaces. However, the fimbrial nature of the sialic acid binding property and sequence information about FimA proteins from multiple strains are lacking. Results Here we have sequenced fimA genes from strains of A.naeslundii genospecies 1 (n = 4 and genospecies 2 (n = 4, both of which harboured variant Galβ-dependent hemagglutination (HA types, and from A.odontolyticus PK984 with a sialic acid-dependent HA pattern. Three unique subtypes of FimA proteins with 63.8–66.4% sequence identity were present in strains of A. naeslundii genospecies 1 and 2 and A. odontolyticus. The generally high FimA sequence identity (>97.2% within a genospecies revealed species specific sequences or segments that coincided with binding specificity. All three FimA protein variants contained a signal peptide, pilin motif, E box, proline-rich segment and an LPXTG sorting motif among other conserved segments for secretion, assembly and sorting of fimbrial proteins. The highly conserved pilin, E box and LPXTG motifs are present in fimbriae proteins from other Gram-positive bacteria. Moreover, only strains of genospecies 1 were agglutinated with type-2 fimbriae antisera derived from A. naeslundii genospecies 1 strain 12104, emphasizing that the overall folding of FimA may generate different functionalities. Western blot analyses with FimA antisera revealed monomers and oligomers of FimA in whole cell protein extracts and a purified recombinant FimA preparation, indicating a sortase-independent oligomerization of FimA. Conclusion The genus Actinomyces involves a diversity of unique FimA proteins with conserved pilin, E box and LPXTG motifs, depending on subspecies and associated binding specificity. In addition, a sortase independent

  6. Structural and antigenic types of cell wall polysaccharides from viridans group streptococci with receptors for oral actinomyces and streptococcal lectins.

    Cisar, J O; Sandberg, A L; Reddy, G P; Abeygunawardana, C; Bush, C A

    1997-01-01

    Lectin-mediated interactions between oral viridans group streptococci and actinomyces may play an important role in microbial colonization of the tooth surface. The presence of two host-like motifs, either GalNAc beta1-->3Gal (Gn) or Gal beta1-->3GalNAc (G), in the cell wall polysaccharides of five streptococcal strains accounts for the lactose-sensitive coaggregations of these bacteria with Actinomyces naeslundii. Three streptococcal strains which have Gn-containing polysaccharides also part...

  7. Identification of a Gene Involved in Assembly of Actinomyces naeslundii T14V Type 2 Fimbriae

    Yeung, Maria K.; Donkersloot, Jacob A.; Cisar, John O.; Ragsdale, Pamela A.

    1998-01-01

    The nucleotide sequence of the Actinomyces naeslundii T14V type 2 fimbrial structural subunit gene, fimA, and the 3′ flanking DNA region was determined. The fimA gene encoded a 535-amino-acid precursor subunit protein (FimA) which included both N-terminal leader and C-terminal cell wall sorting sequences. A second gene, designated orf365, that encoded a 365-amino-acid protein which contained a putative transmembrane segment was identified immediately 3′ to fimA. Mutants in which either fimA o...

  8. Intrauterine device infection causing concomitant streptococcal toxic shock syndrome and pelvic abscess with Actinomyces odontolyticus bacteraemia.

    Wu, Carolyn M Yu; Noska, Amanda

    2016-01-01

    Intrauterine devices (IUDs) are rarely associated with serious infections. We report an unusual concomitant infection of group A Streptococcus (GAS) causing toxic shock syndrome and pelvic abscess with Actinomyces odontolyticus associated with an IUD in a healthy 50-year-old patient. The IUD was subsequently removed and the patient recovered on the appropriate antibiotics. This case highlights the importance of clinicians' high index of suspicion of an IUD infection and prompt removal of the infected foreign body to obtain source control. PMID:26965406

  9. Acción antimicrobiana in vitro de distintas medicaciones sobre Enterococcus faecalis y Actinomyces israelii

    Rodríguez Varo, L.; Pumarola Suñé, José; Canalda Sahli, Carlos

    2009-01-01

    Objetivo: Se comparó in vitro la acción antimicrobiana de diversas medicaciones intraconducto frente a Enterococcus faecalis y Actinomyces israelii. Material y métodos: para evaluar las zonas de inhibición microbiana se utilizó el test de difusión en agar frente a diversas pastas, incluyendo una pasta con base de metronidazol (Grinazole ®), una pasta con base de dexametasona, tiretrocina, polimixana y neomicina (Septomixine forte ®) y otra de hidróxido de calciio (Calcipulpe ®) y paroclorofen...

  10. Cloning and Characterization of an Endoglucanase Gene from Actinomyces sp. Korean Native Goat 40

    Kim, Sung Chan; Kang, Seung Ha; Choi, Eun Young; Hong, Yeon Hee; Bok, Jin Duck; Kim, Jae Yeong; Lee, Sang Suk; Choi, Yun Jaie; Choi, In Soon; Cho, Kwang Keun

    2016-01-01

    A gene from Actinomyces sp. Korean native goat (KNG) 40 that encodes an endo-β-1,4-glucanase, EG1, was cloned and expressed in Escherichia coli (E. coli) DH5α. Recombinant plasmid DNA from a positive clone with a 3.2 kb insert hydrolyzing carboxyl methyl-cellulose (CMC) was designated as pDS3. The entire nucleotide sequence was determined, and an open-reading frame (ORF) was deduced. The ORF encodes a polypeptide of 684 amino acids. The recombinant EG1 produced in E. coli DH5α harboring pDS3 ...

  11. Mandibular Actinomyces osteomyelitis complicating florid cemento-osseous dysplasia: case report

    Edwards Sean P

    2011-07-01

    Full Text Available Abstract Background Apart from neoplastic processes, chronic disfiguring and destructive diseases of the mandible are uncommon. Case Presentation We report, perhaps for the first time, the simultaneous occurrence of two such conditions in one patient, in a case that emphasizes the importance of bone biopsy in establishing the correct diagnosis. Florid cemento-osseous dysplasia (FCOD is a chronic, disfiguring condition of the maxillofacial region. This relatively benign disease is primarily observed in middle-aged women of African ancestry. Cervicofacial actinomycosis is an uncommon and progressive infection caused by bacilli of the Actinomyces genus that typically involves intraoral soft tissues but may also involve bone. The accurate diagnosis of actinomycosis is critical for successful treatment. A diagnosis of osteomyelitis caused by Actinomyces bacteria was diagnosed by bone biopsy in a 53 year-old African-American woman with a longstanding history of FCOD after she presented with a new draining ulcer overlying the mandible. Conclusions Clinicians should be aware of the possibility of actinomycosis arising in the setting of FCOD, and the importance of bone biopsy and cultures in arriving at a definitive and timely diagnosis.

  12. Role of hydrogen peroxide in competition and cooperation between Streptococcus gordonii and Actinomyces naeslundii.

    Jakubovics, Nicholas S; Gill, Steven R; Vickerman, M Margaret; Kolenbrander, Paul E

    2008-12-01

    In dental plaque alpha-haemolytic streptococci, including Streptococcus gordonii, are considered beneficial for oral health. These organisms produce hydrogen peroxide (H(2)O(2)) at concentrations sufficient to kill many oral bacteria. Streptococci do not produce catalase yet tolerate H(2)O(2). We recently demonstrated that coaggregation with Actinomyces naeslundii stabilizes arginine biosynthesis in S. gordonii. Protein arginine residues are sensitive to oxidation by H(2)O(2). Here, the ability of A. naeslundii to protect S. gordonii against self-produced H(2)O(2) was investigated. Coaggregation with A. naeslundii enabled S. gordonii to grow in the absence of arginine, and promoted survival of S. gordonii following growth with or without added arginine. Arginine-replete S. gordonii monocultures contained 20-30 microM H(2)O(2) throughout exponential growth. Actinomyces naeslundii did not produce H(2)O(2) but synthesized catalase, removed H(2)O(2) from coaggregate cultures and decreased protein oxidation in S. gordonii. On solid medium, S. gordonii inhibited growth of A. naeslundii; exogenous catalase overcame this inhibition. In coaggregate cultures, A. naeslundii cell numbers were >90% lower than in monocultures after 24 h. These results indicate that coaggregation with A. naeslundii protects S. gordonii from oxidative damage. However, high cell densities of S. gordonii inhibit A. naeslundii. Therefore, H(2)O(2) may drive these organisms towards an ecologically balanced community in natural dental plaque. PMID:18785881

  13. Draft Genome Sequence of Actinomyces odontolyticus subsp. actinosynbacter Strain XH001, the Basibiont of an Oral TM7 Epibiont

    Jeffrey S. McLean; Liu, Quanhui; Bor, Batbileg; Bedree, Joseph K.; Cen, Lujia; Watling, Michael; To, Thao T.; Bumgarner, Roger E; He, Xuesong; Shi, Wenyuan

    2016-01-01

    Here, we present the draft genome sequence of Actinomyces odontolyticus subsp. actinosynbacter strain XH001, isolated from the human oral cavity. Uniquely, it was discovered as a host bacterium to the ultrasmall epibiont TM7x, which is the first cultivated member of “Candidatus Saccharibacteria” (formerly candidate phylum TM7).

  14. Draft Genome Sequence of Actinomyces odontolyticus subsp. actinosynbacter Strain XH001, the Basibiont of an Oral TM7 Epibiont.

    McLean, Jeffrey S; Liu, Quanhui; Bor, Batbileg; Bedree, Joseph K; Cen, Lujia; Watling, Michael; To, Thao T; Bumgarner, Roger E; He, Xuesong; Shi, Wenyuan

    2016-01-01

    Here, we present the draft genome sequence of Actinomyces odontolyticus subsp. actinosynbacter strain XH001, isolated from the human oral cavity. Uniquely, it was discovered as a host bacterium to the ultrasmall epibiont TM7x, which is the first cultivated member of "Candidatus Saccharibacteria" (formerly candidate phylum TM7). PMID:26847892

  15. Pilonidal Sinus of the Glans Penis Associated with Actinomyces Case Reports and Review of Literature

    Shylashree Chikkamuniyappa

    2004-01-01

    Full Text Available Pilonidal sinus is a well-recognized condition that occurs most commonly in the sacrococcygeal area of younger men. It is hypothesized to be an acquired chronic inflammation condition due mainly to hair trapped beneath the surface. A pilonidal sinus in the sacrococcygeal region is associated with recurrent infection, abscess formation, cellulitis, fistulae, and rarely, squamous cell carcinoma. A pilonidal sinus of the penis is a rare entity. The association of a penile pilonidal cyst and Actinomyces is even more uncommon with only three cases reported previously. Two cases of pilonidal sinus are reported in this paper. One of the cases was associated with actinomycosis. Pilonidal sinus of the penis should be considered in the clinical and pathological differential diagnosis and has to be distinguished from balanoposthitis, epidermal cyst, and carcinoma. The knowledge about possible association with actinomycosis is important to ensure early treatment.

  16. Bacteroides gingivalis-Actinomyces viscosus cohesive interactions as measured by a quantitative binding assay

    There is limited evidence, mostly indirect, to suggest that the adherence of Bacteroides gingivalis to teeth may be enhanced by the presence of gram-positive dental plaque bacteria like Actinomyces viscosus. The purpose of this study was to carry out direct quantitative assessments of the cohesion of B gingivalis and A. viscosus by using an in vitro assay modeled on the natural sequence in which these two species colonize the teeth. The assay allowed comparisons to be made of the adherence of 3H-labeled B. gingivalis 2561 and 381 to saliva-coated hydroxyapatite beads (S-HA) and A. viscosus WVU627- or T14V-coated S-HA (actinobeads) in equilibrium and kinetics binding studies. A series of preliminary binding studies with 3H-labeled A. viscosus and parallel studies by scanning electron microscopy with unlabeled A. viscosus were conducted to establish a protocol by which actinobeads suitable for subsequent Bacteroides adherence experiments could be prepared. By scanning electron microscopy, the actinobeads had only small gaps of exposed S-HA between essentially irreversibly bound A. viscosus cells. Furthermore, B. gingivalis cells appeared to bind preferentially to the Actinomyces cells instead of the exposed S-HA. B. gingivalis binding to both S-HA and actinobeads was saturable with at least 2 X 10(9) to 3 X 10(9) cells per ml, and equilibrium with saturating concentrations was reached within 10 to 20 min. B. gingivalis always bound in greater numbers to the actinobeads than to S-HA. These findings provide direct measurements supporting the concept that cohesion with dental plaque bacteria like A. viscosus may foster the establishment of B. gingivalis on teeth by enhancing its adherence

  17. Regulation of Gene Expression in a Mixed-Genus Community: Stabilized Arginine Biosynthesis in Streptococcus gordonii by Coaggregation with Actinomyces naeslundii▿

    Jakubovics, Nicholas S.; Gill, Steven R.; Iobst, Stacey E.; Vickerman, M M; Kolenbrander, Paul E.

    2008-01-01

    Interactions involving genetically distinct bacteria, for example, between oral streptococci and actinomyces, are central to dental plaque development. A DNA microarray identified Streptococcus gordonii genes regulated in response to coaggregation with Actinomyces naeslundii. The expression of 23 genes changed >3-fold in coaggregates, including that of 9 genes involved in arginine biosynthesis and transport. The capacity of S. gordonii to synthesize arginine was assessed using a chemically de...

  18. Actinomyces tissue specificity may depend on differences in receptor specificity for GalNAc beta-containing glycoconjugates.

    Strömberg, N.; Borén, T

    1992-01-01

    Actinomyces naeslundii 12104 and A. viscosus LY7 were compared for receptor specificities and adherence properties because these relate to their oral colonization sites. Both strains bind GalNAc beta-containing glycosphingolipids (GSLs) in a GalNAc beta 1-3Gal alpha Oethyl-sensitive fashion but differ with respect to the number of cells bound to GSLs and the effect of neighboring sugar groups on the binding. Their hemagglutination and saccharide inhibition profiles confirms the existence of t...

  19. Effect of the Environment on Genotypic Diversity of Actinomyces naeslundii and Streptococcus oralis in the Oral Biofilm

    Paddick, James S.; Brailsford, Susan R; Kidd, Edwina A. M.; Gilbert, Steven C.; Clark, Douglas T.; Alam, Sharmin; Killick, Zoe J.; Beighton, David

    2003-01-01

    The genotypic diversity of Actinomyces naeslundii genospecies 2 (424 isolates) and Streptococcus oralis (446 isolates) strains isolated from two sound approximal sites in all subjects who were either caries active (seven subjects) or caries free (seven subjects) was investigated by using the repetitive extragenic palindromic PCR. The plaque from the caries-active subjects harbored significantly greater proportions of mutans streptococci and lactobacilli and a smaller proportion of A. naeslund...

  20. Amended Description of the Genes for Synthesis of Actinomyces naeslundii T14V Type 1 Fimbriae and Associated Adhesin▿ †

    CHEN, PING; Cisar, John O.; Hess, Sonja; Ho, Jenny T. C.; Leung, Kai P.

    2007-01-01

    The type 1 fimbriae of Actinomyces naeslundii T14V mediate adhesion of this gram-positive species to the tooth surface. The present findings show that the locus for type 1 fimbria production in this strain includes three genes, fimQ for a minor fimbrial subunit that appears to be an adhesin, fimP for the major structural subunit, and srtC1 for a type 1 fimbria-specific sortase involved in the assembly of these structures.

  1. A 160-kilodalton epithelial cell surface glycoprotein recognized by plant lectins that inhibit the adherence of Actinomyces naeslundii.

    Brennan, M J; Cisar, J O; Sandberg, A L

    1986-01-01

    The adherence of Actinomyces naeslundii to human epithelial (KB) cells is mediated by the interaction of a fimbrial lectin on this oral bacterium with epithelial cell receptors exposed by sialidase. The D-galactose- and N-acetyl-D-galactosamine-reactive plant lectins from peanut and from Bauhinia purpurea inhibit this interaction. This report describes the partial purification and characterization of a 160-kilodalton (kDa) cell surface glycoprotein which is the principal receptor for these le...

  2. Identification of Independent Streptococcus gordonii SspA and SspB Functions in Coaggregation with Actinomyces naeslundii

    Egland, Paul G.; Dû, Laurence D.; Kolenbrander, Paul E.

    2001-01-01

    The initial stages of dental plaque formation involve the adherence of early colonizing organisms such as Streptococcus gordonii and Actinomyces naeslundii to the saliva-coated tooth surface and to each other. The S. gordonii surface proteins SspA and SspB are known to play a role in adherence to salivary proteins and mediate coaggregation with other bacteria. Coaggregation is the adhesin receptor-mediated interaction between genetically distinct cell types and appears to be ubiquitous among ...

  3. The polymicrobial Actinomyces naeslundii and Pseudomonas aeruginosa sepsis in a patient with ulcerative colitis 2 months after colonoscopy.

    Topić, Mirjana Balen; Desnica, Boško; Vicković, Ninoslava; Skuhala, Tomislava; Bayer, Kristijan; Bukovski, Suzana

    2014-02-01

    We describe a case of an abrupt onset of polymicrobial Actinomyces naeslundii/Pseudomonas aeruginosa sepsis in a patient with a previously silent abdominal actinomycosis, developed 2 months after colonoscopy when the diagnosis of a left-sided ulcerative colitis was established. Prolonged high-dose ceftriaxone therapy was clinically effective, albeit accompanied by the development of a reversible pseudocholelithiasis that persisted for 5 months. PMID:24297267

  4. Pulmonary intravascular macrophages in the pathogenesis of bovine pulmonary lesions caused by Actinomyces pyogenes

    Leifsson, Páll Skúli; Basse, A.; Jensen, Henrik Michael Elvang;

    1995-01-01

    Rabbit antisera raised against somatic antigens from two strains of Actinomyces pyogenes reacted specifically in a peroxidase anti-peroxidase technique which was developed for the location of the bacteria in formalin-fixed tissues. The technique was applied on experimental murine and spontaneous...... bovine lesions caused by A. pyogenes. By electron microscopy and immunohistochemistry it was demonstrated that pulmonary intravascular macrophages play a role in the uptake of A. pyogenes from the blood, and in the production of pyaemic pulmonary lesions...

  5. Fulminant course of unilateral emphysematous pyelonephritis revealing a renal actinomycosis caused by Actinomyces meyeri, an unknown cause of septic shock

    Herbland, Alexandre; Leloup, Maxime; Levrat, Quentin; Guillaume, Frédéric; Verrier, Virginie; Bouillard, Philippe; Landois, Thierry; Ouaki, Charlie Frédéric; Lesieur, Olivier

    2014-01-01

    The objective of this case report is to describe the first case of renal actinomycosis caused by Actinomyces meyeri presenting as severe emphysematous pyelonephritis and complicated by septic shock and multi-organ failure. Emphysematous pyelonephritis is a potentially life-threatening infection mostly described in diabetic patients and predominantly caused by uropathogenic bacteria. Actinomycosis is an uncommon chronic infection due to anaerobic gram-positive bacteria that unusually involves ...

  6. Glucose uptake by Streptococcus mutans, Streptococcus mitis, and Actinomyces viscosus in the presence of human saliva.

    Germaine, G R; Tellefson, L M

    1982-12-01

    Glucose uptake was examined by using whole-cell suspensions of Streptococcus mutans (strains BHT, Ingbritt, and GS-5), Streptococcus mitis (strains 9811 and 72x41), and Actinomyces viscosus (strains T6 and WVU626) incubated for up to 90 min in 0 to 82% (vol/vol) human whole salivary supernatant. Glucose uptake by the S. mutans strains was completely inhibited at all saliva concentrations. Dithiothreitol (DTT), present during saliva incubation, prevented saliva inhibition. Glucose uptake was also restored when saliva-inhibited cells were subsequently exposed to DTT. The inclusion of catalase in the saliva incubation mixtures resulted in protection equal to that obtained with DTT. The S. mitis strains were also inhibited by saliva but to a far lesser extent that S. mutans. DTT and catalase also protected S. mitis from saliva inhibition. Both A. viscosus strains were completely refractory to saliva inhibition of glucose uptake. Based on (i) the sensitivity of the catalase-negative streptococci and the resistance of catalase-positive actinomyces to saliva inhibition and (ii) the equal and complete protection to saliva inhibition afforded by DTT and catalase, we conclude that the lactoperoxidase-SCN(-)-H(2)O(2) system in saliva was the only antibacterial system expressed under our experimental conditions. The relative resistance of S. mitis 9811 (compared with S. mutans BHT) to saliva inhibition was shown not to result from poor H(2)O(2) production in either glucose-supplemented buffer or saliva solutions. S. mitis produced inhibitory quantities of H(2)O(2) that equaled or exceeded S. mutans H(2)O(2) accumulation. It is suggested that S. mitis might possess a greater ability to repair lactoperoxidase-mediated damage than does S. mutans. Every organism studied exhibited a saliva concentration-dependent, cell growth-independent stimulation of glucose uptake after 60 to 90 min of incubation. The A. viscosus and S. mitis strains showed saliva stimulation (or stabilization

  7. Corrosion behavior of pure titanium in the presence of Actinomyces naeslundii.

    Zhang, Song-Mei; Qiu, Jing; Tian, Fei; Guo, Xiao-Kui; Zhang, Fu-Qiang; Huang, Qing-Feng

    2013-05-01

    It is well known that some microorganisms affect the corrosion of dental metal. Oral bacteria such as Actinomyces naeslundii may alter the corrosion behavior and stability of titanium. In this study, the corrosion behavior of titanium was studied in a nutrient-rich medium both in the presence and the absence of A. naeslundii using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS). A. naeslundii was able to colonize the surface of titanium and then form a dense biofilm. The SEM images revealed the occurrence of micropitting corrosion on the metal surface after removal of the biofilm. The electrochemical corrosion results from EIS showed a significant decrease in the corrosion resistant (R(p)) value after immersing the metal in A. naeslundii culture for 3 days. Correspondingly, XPS revealed a reduction in the relative levels of titanium and oxygen and an obvious reduction of dominant titanium dioxide (TiO₂) in the surface oxides after immersion of the metal in A. naeslundii culture. These results suggest that the metabolites produced by A. naeslundii can weaken the integrity and stability of the protective TiO₂ in the surface oxides, which in turn decreases the corrosion resistance of titanium, resulting in increased corrosion of titanium immersed in A. naeslundii solution as a function of time. PMID:23430335

  8. Coaggregation of Candida albicans, Actinomyces naeslundii and Streptococcus mutans is Candida albicans strain dependent.

    Arzmi, Mohd Hafiz; Dashper, Stuart; Catmull, Deanne; Cirillo, Nicola; Reynolds, Eric C; McCullough, Michael

    2015-08-01

    Microbial interactions are necessarily associated with the development of polymicrobial oral biofilms. The objective of this study was to determine the coaggregation of eight strains of Candida albicans with Actinomyces naeslundii and Streptococcus mutans. In autoaggregation assays, C. albicans strains were grown in RPMI-1640 and artificial saliva medium (ASM) whereas bacteria were grown in heart infusion broth. C. albicans, A. naeslundii and S. mutans were suspended to give 10(6), 10(7) and 10(8) cells mL(-1) respectively, in coaggregation buffer followed by a 1 h incubation. The absorbance difference at 620 nm (ΔAbs) between 0 h and 1 h was recorded. To study coaggregation, the same protocol was used, except combinations of microorganisms were incubated together. The mean ΔAbs% of autoaggregation of the majority of RPMI-1640-grown C. albicans was higher than in ASM grown. Coaggregation of C. albicans with A. naeslundii and/or S. mutans was variable among C. albicans strains. Scanning electron microscopy images showed that A. naeslundii and S. mutans coaggregated with C. albicans in dual- and triculture. In conclusion, the coaggregation of C. albicans, A. naeslundii and S. mutans is C. albicans strain dependent. PMID:26054855

  9. Actinomyces naeslundii GroEL-dependent initial attachment and biofilm formation in a flow cell system.

    Arai, Toshiaki; Ochiai, Kuniyasu; Senpuku, Hidenobu

    2015-02-01

    Actinomyces naeslundii is an early colonizer with important roles in the development of the oral biofilm. The effects of butyric acid, one of short chain fatty acids in A. naeslundii biofilm formation was observed using a flow cell system with Tryptic soy broth without dextrose and with 0.25% sucrose (TSB sucrose). Significant biofilms were established involving live and dead cells in TSB sucrose with 60mM butyric acid but not in concentrations of 6, 30, 40, and 50mM. Biofilm formation failed in 60mM sodium butyrate but biofilm level in 60mM sodium butyrate (pH4.7) adjusted with hydrochloric acid as 60mM butyric media (pH4.7) was similar to biofilm levels in 60mM butyric acid. Therefore, butyric acid and low pH are required for significant biofilm formation in the flow cell. To determine the mechanism of biofilm formation, we investigated initial A. naeslundii colonization in various conditions and effects of anti-GroEL antibody. The initial colonization was observed in the 60mM butyric acid condition and anti-GroEL antibody inhibited the initial colonization. In conclusion, we established a new biofilm formation model in which butyric acid induces GroEL-dependent initial colonization of A. naeslundii resulting in significant biofilm formation in a flow system. PMID:25555820

  10. Antiaggregation potential of berry fractions against pairs of Streptococcus mutans with Fusobacterium nucleatum or Actinomyces naeslundii.

    Riihinen, Kaisu; Ryynänen, Anu; Toivanen, Marko; Könönen, Eija; Törrönen, Riitta; Tikkanen-Kaukanen, Carina

    2011-01-01

    Coaggregation is an interspecies adhesion process, which is essential to the development of dental plaque. This is an in vitro study of the composition of the soluble solids in the berry juice molecular size fractions (100 kDa, FIII) derived from apple, bilberry, blackcurrant, cloudberry, crowberry and lingonberry and their ability to inhibit and reverse coaggregation of the pairs of common species in dental plaque: Streptococcus mutans with Fusobacterium nucleatum or Actinomyces naeslundii. Inhibitory and reversal activity was found in the molecular size fractions FII and FIII of bilberry, blackcurrant, crowberry and lingonberry. The active fractions contained higher amounts of polyphenols (5-12% of soluble solids) than those without activity (<2% of soluble solids). Proanthocyanidins dominated in the active lingonberry juice fractions FII and FIII and also small amounts of anthocyanins were detected. Anthocyanins, proanthocyanidins and flavonol glycosides were prevalent in FII and FIII fractions of bilberry, blackcurrant and crowberry juices. Comparable amounts of sugars and titratable acids were present in the latter three berry juice fractions of different size. The results indicate that the high molecular size fractions of lingonberry, bilberry, blackcurrant and crowberry juices have antiaggregation potential on common oral bacteria, the potential being associated with their polyphenolic content. PMID:20623601

  11. Humoral Immunity to Commensal Oral Bacteria in Human Infants: Salivary Antibodies Reactive with Actinomyces naeslundii Genospecies 1 and 2 during Colonization

    Cole, Michael F.; Bryan, Stacey; Evans, Mishell K.; Pearce, Cheryl L.; Sheridan, Michael J.; Sura, Patricia A.; Wientzen, Raoul; Bowden, George H. W.

    1998-01-01

    The secretory immune response in saliva to colonization by Actinomyces naeslundii genospecies 1 and 2 was studied in 10 human infants from birth to 2 years of age. Actinomyces species were not recovered from the mouths of the infants until approximately 4 months after the eruption of teeth. However, low levels of secretory immunoglobulin A1 (SIgA1) and SIgA2 antibodies reactive with whole cells of A. naeslundii genospecies 1 and 2 were detected within the first month after birth. Although the...

  12. Sequence homology between the subunits of two immunologically and functionally distinct types of fimbriae of Actinomyces spp.

    Yeung, M K; Cisar, J O

    1990-01-01

    Nucleotide sequencing of the type 1 fimbrial subunit gene of Actinomyces viscosus T14V revealed a consensus ribosome-binding site followed by an open reading frame of 1,599 nucleotides. The encoded protein of 533 amino acids (Mr = 56,899) was predominantly hydrophilic except for an amino-terminal signal peptide and a carboxy-terminal region identified as a potential membrane-spanning segment. Edman degradation of the cloned protein expressed in Escherichia coli and the type 1 fimbriae of A. v...

  13. Cloning of the Streptococcus gordonii PK488 gene, encoding an adhesin which mediates coaggregation with Actinomyces naeslundii PK606.

    Andersen, R N; Ganeshkumar, N.; Kolenbrander, P. E.

    1993-01-01

    Coaggregation between Streptococcus gordonii PK488 and Actinomyces naeslundii PK606 is mediated by a 38-kDa streptococcal protein, designated ScaA. The gene, scaA, which encodes this protein has been cloned into Escherichia coli. A genomic S. gordonii PK488 library (in Lambda ZAP II) was screened with anti-S. gordonii immunoglobulin G absorbed with S. gordonii PK1804, an isogenic coaggregation-defective mutant of strain PK488. A positive recombinant phage was isolated, and a phagemid designat...

  14. Biosynthetic Gene Cluster of Cetoniacytone A, an Unusual Aminocyclitol from the Endosymbiotic Bacterium Actinomyces sp. Lu 9419

    Wu, Xiumei; Flatt, Patricia M.; Xu, Hui; Mahmud, Taifo

    2009-01-01

    A gene cluster responsible for the biosynthesis of the antitumor agent cetoniacytone A was identified in Actinomyces sp. strain Lu 9419, an endosymbiotic bacteria isolated from the intestines of the rose chafer beetle (Cetonia aurata). The nucleotide sequence analysis of the 46 kb DNA region revealed the presence of 31 complete ORFs, including genes predicted to encode a 2-epi-5-epi-valiolone synthase (CetA), a glyoxalase/bleomycin resistance protein (CetB), an acyltransferase (CetD), an FAD-...

  15. Binding of colloidal gold-labeled salivary proline-rich proteins to Actinomyces viscosus type 1 fimbriae.

    Leung, K P; Nesbitt, W E; Fischlschweiger, W; Hay, D I; Clark, W B

    1990-01-01

    Salivary proline-rich proteins (PRPs), which were purified from parotid saliva, were adsorbed onto 15-nm-diameter gold particles to visualize specific binding of the salivary molecules to Actinomyces viscosus type 1 fimbriae. Negatively stained preparations incubated with PRP-gold conjugates but not bovine serum albumin-gold complexes bound specifically to bacteria possessing type 1 fimbriae, A. viscosus T14V-J1 and 5519. Binding of the PRP-gold probes to strains deficient in type 1 fimbriae,...

  16. Antimicrobial Effects of Novel Triple Antibiotic Paste–Mimic Scaffolds on Actinomyces naeslundii Biofilm

    Albuquerque, Maria T.P.; Ryan, Stuart J.; Münchow, Eliseu A.; Kamocka, Maria M.; Gregory, Richard L.; Valera, Marcia C.; Bottino, Marco C.

    2015-01-01

    Introduction Actinomyces naeslundii has been recovered from traumatized permanent teeth diagnosed with necrotic pulps. In this work, a triple antibiotic paste (TAP)–mimic scaffold is proposed as a drug-delivery strategy to eliminate A. naeslundii dentin biofilm. Methods Metronidazole, ciprofloxacin, and minocycline were added to a polydioxanone (PDS) polymer solution and spun into fibrous scaffolds. Fiber morphology, mechanical properties, and drug release were investigated by using scanning electron microscopy, microtensile testing, and high-performance liquid chromatography, respectively. Human dentin specimens (4 × 4 × 1 mm3, n = 4/group) were inoculated with A. naeslundii (ATCC 43146) for 7 days for biofilm formation. The infected dentin specimens were exposed to TAP-mimic scaffolds, TAP solution (positive control), and pure PDS (drug-free scaffold). Dentin infected (7-day biofilm) specimens were used for comparison (negative control). Confocal laser scanning microscopy was done to determine bacterial viability. Results Scaffolds displayed a submicron mean fiber diameter (PDS = 689 ± 312 nm and TAP-mimic = 718 ± 125 nm). Overall, TAP-mimic scaffolds showed significantly (P ≤ .040) lower mechanical properties than PDS. Within the first 24 hours, a burst release for all drugs was seen. A sustained maintenance of metronidazole and ciprofloxacin was observed over 4 weeks, but not for minocycline. Confocal laser scanning microscopy demonstrated complete elimination of all viable bacteria exposed to the TAP solution. Meanwhile, TAP-mimic scaffolds led to a significant (P < .05) reduction in the percentage of viable bacteria compared with the negative control and PDS. Conclusions Our findings suggest that TAP-mimic scaffolds hold significant potential in the eradication/elimination of bacterial biofilm, a critical step in regenerative endodontics. PMID:25917945

  17. Characterization of fimbriae of Actinomyces naeslundii N16 using monoclonal and polyclonal antibodies

    Bragg, S.L.

    1988-01-01

    Two populations of fimbriae, which differ both in antigenicity and biological activity, have been identified on Actinomyces viscosus T14V cells. Although A. naeslundii serotype 1 isolates possess only one of these fimbrial populations (type 2 fimbriae), there was functional evidence to suggest that A. naeslundii serotype 3 strain N16 had both types of fimbriae. The purpose of this study was to characterize the fimbriae of A. naeslundii N16 immunologically by using both monoclonal and polyclonal antibodies. Three monoclonal antibodies (MAbs) to N16 were produced; all three bound to N16 fimbriae as determined by immunoelectron microscopy. In a solid-phase radioimmunoassay MAb 3B5.A1 reacted with 100% of the A. naeslundii serotype 3 isolates tested, but it did not react with any heterologous isolates. Type 1 and type 2 fimbriae were detected in Lancefield extracts of N16 cells by crossed immunoelectrophoresis (XIEP) using rabbit antiserum against N16 whole cells. When {sup 125}I-MAb 3B5.A1 was also incorporated into the gel, autoradiography indicated that MAb 3B5.A1 was specific for type 2 fimbriae. The N16 type 2 fimbriae were purified by gel filtration and immunoaffinity chromatography on a MAb 3B5.A1 column. Fimbriae-specific polyclonal and monoclonal antibodies were used in various immunological assays to determine that (a) N16 type 1 fimbriae are not related antigenically to type 2 fimbriae, (b) each type of fimbriae has epitopes that are present on the corresponding fimbriae of certain heterologous strains, and (c) MAb 3B5.A1 recognizes a serotype-specific epitope residing on the type 2 fimbriae of A. naeslundii serotype 3 strains.

  18. Effects of short-chain fatty acids on Actinomyces naeslundii biofilm formation.

    Yoneda, S; Kawarai, T; Narisawa, N; Tuna, E B; Sato, N; Tsugane, T; Saeki, Y; Ochiai, K; Senpuku, H

    2013-10-01

    Actinomyces naeslundii is an early colonizer and has important roles in the development of the oral biofilm. Short-chain fatty acids (SCFA) are secreted extracellularly as a product of metabolism by gram-negative anaerobes, e.g. Porphyromonas gingivalis and Fusobacterium nucleatum; and the SCFA may affect biofilm development with interaction between A. naeslundii and gram-negative bacteria. Our aim was to investigate the effects of SCFA on biofilm formation by A. naeslundii and to determine the mechanism. We used the biofilm formation assay in 96-well microtiter plates in tryptic soy broth without dextrose and with 0.25% sucrose using safranin stain of the biofilm monitoring 492 nm absorbance. To determine the mechanism by SCFA, the production of chaperones and stress-response proteins (GrpE and GroEL) in biofilm formation was examined using Western blot fluorescence activity with GrpE and GroEL antibodies. Adding butyric acid (6.25 mm) 0, 6 and 10 h after beginning culture significantly increased biofilm formation by A. naeslundii, and upregulation was observed at 16 h. Upregulation was also observed using appropriate concentrations of other SCFA. In the upregulated biofilm, production of GrpE and GroEL was higher where membrane-damaged or dead cells were also observed. The upregulated biofilm was significantly reduced by addition of anti-GroEL antibody. The data suggest biofilm formation by A. naeslundii was upregulated dependent on the production of stress proteins, and addition of SCFA increased membrane-damaged or dead cells. Production of GroEL may physically play an important role in biofilm development. PMID:23731652

  19. Cloning and Characterization of an Endoglucanase Gene from Actinomyces sp. Korean Native Goat 40.

    Kim, Sung Chan; Kang, Seung Ha; Choi, Eun Young; Hong, Yeon Hee; Bok, Jin Duck; Kim, Jae Yeong; Lee, Sang Suk; Choi, Yun Jaie; Choi, In Soon; Cho, Kwang Keun

    2016-01-01

    A gene from Actinomyces sp. Korean native goat (KNG) 40 that encodes an endo-β-1,4-glucanase, EG1, was cloned and expressed in Escherichia coli (E. coli) DH5α. Recombinant plasmid DNA from a positive clone with a 3.2 kb insert hydrolyzing carboxyl methyl-cellulose (CMC) was designated as pDS3. The entire nucleotide sequence was determined, and an open-reading frame (ORF) was deduced. The ORF encodes a polypeptide of 684 amino acids. The recombinant EG1 produced in E. coli DH5α harboring pDS3 was purified in one step using affinity chromatography on crystalline cellulose and characterized. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis/zymogram analysis of the purified enzyme revealed two protein bands of 57.1 and 54.1 kDa. The amino terminal sequences of these two bands matched those of the deduced ones, starting from residue 166 and 208, respectively. Putative signal sequences, a Shine-Dalgarno-type ribosomal binding site, and promoter sequences related to the consensus sequences were deduced. EG1 has a typical tripartite structure of cellulase, a catalytic domain, a serine-rich linker region, and a cellulose-binding domain. The optimal temperature for the activity of the purified enzyme was 55°C, but it retained over 90% of maximum activity in a broad temperature range (40°C to 60°C). The optimal pH for the enzyme activity was 6.0. Kinetic parameters, Km and Vmax of rEG1 were 0.39% CMC and 143 U/mg, respectively. PMID:26732336

  20. Biochemical characterization of a halotolerant feruloyl esterase from Actinomyces spp.: refolding and activity following thermal deactivation.

    Hunt, Cameron J; Tanksale, Akshat; Haritos, Victoria S

    2016-02-01

    Ferulic acid esterases (FAE, EC. 3.1.1.73) hydrolyse the linkage between hemicellulose and lignin and thus have potential for use in mild enzymatic pretreatment of biomass as an alternative to thermochemical approaches. Here, we report the characterization of a novel FAE (ActOFaeI) obtained from the bacterium, Actinomyces sp. oral which was recombinantly expressed in Escherichia coli BL21 in two forms: with and without its putative signal peptide. The truncated form was found to have purification. The enzyme with retained peptide demonstrated 2 to 4-fold higher activity against methyl caffeate and methyl p-coumarate, with specific activities of 477.6 and 174.4 U mg(-1) respectively, than the equivalent activities of the benchmark FAE from Aspergillus niger A and B. ActOFaeI retained activity over a broad pH range with a maximum at 9 but >90 % relative activity at pH 6.5 and an optimum reaction temperature of 30 °C. ActOFaeI increased activity by 15% in high salt conditions (1000 mMNaCl) and its thermal unfolding temperature improved from 41.5 °C in standard buffer to 74 °C in the presence of 2500 mM sodium malonate. ActOFaeI also released ferulic acid from destarched wheat bran when combined with a xylanase preparation. After treatment above the thermal denaturation temperature followed by cooling to room temperature, ActOFaeI demonstrated spontaneous refolding into an active state. ActOFaeI displays many useful characteristics for enzymatic pretreatment of lignocellulose and contributes to our understanding of this important family. PMID:26497017

  1. Effects of silver diamine fluoride on dentine carious lesions induced by Streptococcus mutans and Actinomyces naeslundii biofilms.

    Chu, Chun Hung; Mei, Lei; Seneviratne, Chaminda Jayampath; Lo, Edward Chin Man

    2012-01-01

    BACKGROUND. Silver diamine fluoride (SDF) has been shown to be a successful treatment for arresting caries. However, the mechanism of SDF is to be elucidated. AIM. To characterize the effects of SDF on dentine carious induced by Streptococcus mutans and Actinomyces naeslundii. DESIGN.  Thirty-two artificially demineralized human dentine blocks were inoculated: 16 with S. mutans and 16 with A. naeslundii. Either SDF or water was applied to eight blocks in each group. Biofilm morphology, microbial kinetics and viability were evaluated by scanning electron microscopy, colony forming units, and confocal microscopy. The crosssection of the dentine carious lesions were assessed by microhardness testing, scanning electron microscopy with energy-dispersive x-ray spectroscopy and Fourier transform infrared spectroscopy. RESULTS. Biofilm counts were reduced in SDF group than control (P naeslundii formed on dentine surfaces. SDF slowed down demineralization of dentine. This dual activity could be the reason behind clinical success of SDF. PMID:21702854

  2. Study of Humoral Immunity to Commensal Oral Bacteria in Human Infants Demonstrates the Presence of Secretory Immunoglobulin A Antibodies Reactive with Actinomyces naeslundii Genospecies 1 and 2 Ribotypes

    Cole, Michael F.; Evans, Mishell K.; Kirchherr, Jennifer L.; Sheridan, Michael J.; Bowden, G. H. W.

    2004-01-01

    The mouths of three human infants were examined from birth to age 2 years to detect colonization of Actinomyces naeslundii genospecies 1 and 2. These bacteria did not colonize until after tooth eruption. The diversity of posteruption isolates was determined by ribotyping. Using immunoblotting and enzyme-linked immunosorbent assay, we determined the reactivity of secretory immunoglobulin A (SIgA) antibodies in saliva samples collected from each infant before and after colonization against cell...

  3. Fusobacterium nucleatum ATCC 10953 Requires Actinomyces naeslundii ATCC 43146 for Growth on Saliva in a Three-Species Community That Includes Streptococcus oralis 34▿

    Periasamy, Saravanan; Chalmers, Natalia I.; Du-Thumm, Laurence; Kolenbrander, Paul E.

    2009-01-01

    Formation of dental plaque is a developmental process involving initial and late colonizing species that form polymicrobial communities. Fusobacteria are the most numerous gram-negative bacteria in dental plaque, but they become prevalent after the initial commensal colonizers, such as streptococci and actinomyces, have established communities. The unusual ability of these bacteria to coaggregate with commensals, as well as pathogenic late colonizers, has been proposed to facilitate colonizat...

  4. Effects of Fruit and Vegetable Low Molecular Mass Fractions on Gene Expression in Gingival Cells Challenged with Prevotella intermedia and Actinomyces naeslundii

    Laura Canesi; Cristina Borghi; Monica Stauder; Peter Lingström; Adele Papetti; Jonathan Pratten; Caterina Signoretto; Spratt, David A.; Mike Wilson; Egija Zaura; Carla Pruzzo

    2011-01-01

    Low molecular mass (LMM) fractions obtained from extracts of raspberry, red chicory, and Shiitake mushrooms have been shown to be an useful source of specific antibacterial, antiadhesion/coaggregation, and antibiofilm agent(s) that might be used for protection towards caries and gingivitis. In this paper, the effects of such LMM fractions on human gingival KB cells exposed to the periodontal pathogens Prevotella intermedia and Actinomyces naeslundii were evaluated. Expression of cytokeratin 1...

  5. Development of Amplified 16S Ribosomal DNA Restriction Analysis for Identification of Actinomyces Species and Comparison with Pyrolysis-Mass Spectrometry and Conventional Biochemical Tests

    Hall, Val; O’Neill, G. L.; Magee, J T; Duerden, B I

    1999-01-01

    Identification of Actinomyces spp. by conventional phenotypic methods is notoriously difficult and unreliable. Recently, the application of chemotaxonomic and molecular methods has clarified the taxonomy of the group and has led to the recognition of several new species. A practical and discriminatory identification method is now needed for routine identification of clinical isolates. Amplified 16S ribosomal DNA restriction analysis (ARDRA) was applied to reference strains (n = 27) and clinic...

  6. Impact of Actinomyces naeslundii on bisphosphonate-related osteonecrosis of the jaws in ovariectomized rats with periodontitis.

    Li, Chun Lei; Seneviratne, Chaminda Jayampath; Huo, Lei; Lu, Weijia William; Zheng, Li Wu

    2015-10-01

    Bisphosphonates-related osteonecrosis of the jaws (BRONJ) is a severe complication of BPs therapy with unknown pathogenesis. This study aimed to evaluate the impact of Actinomyces naeslundii (A. naeslundii) on the progression of BRONJ in ovariectomized (OVX) rat model with periodontal diseases. Sixty rats were randomly assigned into four groups. All rats underwent bilateral ovariectomy. Six weeks after surgery, animals with periodontitis induced by ligature placement were administrated with normal saline (NS), NS &A. naeslundii inoculation, zolecdronic acid (ZA) and ZA &A. naeslundii inoculation for 12 weeks, respectively. Loads of total bacteria and A. naeslundii in the mouth were assessed by real time PCR. After sacrifice, the mandibles were harvested for micro-computed tomography (micro-CT) and histological examination. Real-time PCR demonstrated that A. naeslundii was not routinely found in the rats and ZA treatment did not promote its accumulation. Micro-CT examination disclosed that ligature placement induced significant alveolar bone loss, which was greatly attenuated by ZA treatment and aggravated by A. naeslundii. Histological assessment demonstrated that ZA treatment increased the risk of developing BRONJ-like disease but this condition was not worsen with the presence of A. naeslundii. Our study suggested that oral A. naeslundii inoculation aggravated periodontal disease but not BRONJ in our animal model. PMID:26293192

  7. A STUDY ON IN VITRO ANTIBACTERIAL ACTIVITY OF FICUS BENGALENSIS LINN. ON DENTAL CARIES PATHOGENS STREPTOCOCCUS MUTANS AND ACTINOMYCES VISCOSUS

    F. M. B. Prashanth, I. Kannan*, C. Sambandam, M. Jayalakshmi, R.K. Premavathy and S. Shantha

    2013-02-01

    Full Text Available The aerial roots of Ficus bengalensis Linn. were collected in and around Chennai, Tamilnadu, India They were washed, shade dried and were ground into powder. The powder was extracted with chloroform, petroleum ether, methanol and hexane. The antibacterial screening of the extracts was carried out by determining the zone of inhibition using disc diffusion method. The strains were grown to logarithmic phase in BHI broth and the inoculum was prepared by adjusting the turbidity of bacterial suspension to 0.5 McFarland’s tube. The dried extracts was dissolved in 10% Dimethyl sulphoxide (DMSO in required concentration. The sterile discs were impregnated with 20 μl of extract. The extract discs were placed on BHI agar plates, which were previously inoculated with test strains and incubated at 37oC for 24 hours. Ampicillin disc (10μg and 10% DMSO impregnated discs were used as positive and negative controls respectively and the zones of inhibition were recorded. The Minimum inhibitory concentration was determined by agar dilution method. The results of the present study showed that the methanol and chloroform extracts of Ficus bengalensis Linn. have activity against both Streptococcus mutans and Actinomyces viscosus. From the present study it is concluded that Ficus bengalensis Linn. extracts can be used as an effective antibacterial agent against dental caries.

  8. Fulminant course of unilateral emphysematous pyelonephritis revealing a renal actinomycosis caused by Actinomyces meyeri, an unknown cause of septic shock.

    Herbland, Alexandre; Leloup, Maxime; Levrat, Quentin; Guillaume, Frédéric; Verrier, Virginie; Bouillard, Philippe; Landois, Thierry; Ouaki, Charlie Frédéric; Lesieur, Olivier

    2014-01-01

    The objective of this case report is to describe the first case of renal actinomycosis caused by Actinomyces meyeri presenting as severe emphysematous pyelonephritis and complicated by septic shock and multi-organ failure. Emphysematous pyelonephritis is a potentially life-threatening infection mostly described in diabetic patients and predominantly caused by uropathogenic bacteria. Actinomycosis is an uncommon chronic infection due to anaerobic gram-positive bacteria that unusually involves the urinary tract. We report the first case of emphysematous pyelonephritis caused by A. meyeri in a 75-year-old non-diabetic woman. The patient presented with an altered status, fever, nausea, and vomiting lasting for 2 days. A computed tomography scan revealed unilateral emphysematous pyelonephritis. She was rapidly admitted to intensive care unit for a septic shock with multiple organ dysfunctions. A conservative management consisting in renal percutaneous drainage, supportive measures, and prolonged adapted antibiotic therapy resulted in complete recovery. This case report illustrates that renal actinomycosis should be considered in case of emphysematous pyelonephritis given the good prognosis of this infection with conservative medical treatment. PMID:25878793

  9. Actinomyces naeslundii Displays Variant fimP and fimA Fimbrial Subunit Genes Corresponding to Different Types of Acidic Proline-Rich Protein and β-Linked Galactosamine Binding Specificity

    Hallberg, K.; Holm, C.; Öhman, U.; Strömberg, N.

    1998-01-01

    Actinomyces naeslundii genospecies 1 and 2 bind to acidic proline-rich proteins (APRPs) and statherin via type 1 fimbriae and to β-linked galactosamine (GalNAcβ) structures via type 2 fimbriae. In addition, A. naeslundii displays two types of binding specificity for both APRPs-statherin and GalNAcβ, while Actinomyces odontolyticus binds to unknown structures. To study the molecular basis for these binding specificities, DNA fragments spanning the entire or central portions of fimP (type 1) an...

  10. Synthesis and function of Actinomyces naeslundii T14V type 1 fimbriae require the expression of additional fimbria-associated genes.

    Yeung, M K; Ragsdale, P A

    1997-01-01

    The nucleotide sequence of the chromosomal DNA flanking the Actinomyces naeslundii (formerly A. viscosus) T14V type 1 fimbrial structural subunit gene (fimP) was determined. Six open reading frames (ORFs), in the order 5' ORF3, ORF2, ORF1,fimP, ORF4, ORF5, ORF6 3', were identified. ORF1 encoded a protein of 408 amino acid residues (Mr = 39,270) and had significant sequence homology with the A. naeslundii T14V type 1 and A. naeslundii WVU45 type 2 fimbrial structural subunits. An in-frame fusi...

  11. Dynamic changes in the initial colonization of Actinomyces naeslundii and Streptococcus gordonii using a new animal model.

    Zhang, Xi; Senpuku, Hidenobu

    2013-01-01

    Actinomyces naeslundii and Streptococcus gordonii are the predominant bacteria and initial colonizers of oral microflora. The binding of A. naeslundii and S. gordonii and the interaction between them on the salivary pellicle-coated tooth surface play an important role in the biofilm development. Recently, we reported that NOD/SCID.e2f1(-) mice are a useful model for studying oral biofilm formation by Streptococcus mutans on the tooth surface. In this study, we aimed to determine whether NOD/SCID.e2f1(-) mice can be used for studying oral colonization of A. naeslundii and S. gordonii. Colonization of A. naeslundii in mice fed with 1% sucrose water for 24 h before inoculation was higher than that among mice fed with sucrose water for 1 h. A. naeslundii colonization using mixed species-inoculation was lower than that using single-species inoculation 30-90 min after inoculation; however, the colonization was higher 120-180 min after inoculation. The mixed inoculation induced better colonization of S. gordonii than single-species inoculation 60-180 min after inoculation. Polyclonal and fluorescein isothiocyanate-labeled antibody stained bacteria showed better colonization of S. gordonii when a mixed culture is used in vivo. NOD/SCID.e2f1(-) mice were useful for studying the initial colonization of A. naeslundii and S. gordonii. Long-term supply of sucrose water creates a favorable environment for the initial colonization of A. naeslundii that, in turn, supports the colonization of S. gordonii. PMID:23429078

  12. Genetic and biochemical properties of a hemolysin (pyolysin) produced by a swine isolate of Arcanobacterium (Actinomyces) pyogenes.

    Ikegami, M; Hashimoto, N; Kaidoh, T; Sekizaki, T; Takeuchi, S

    2000-01-01

    Arcanobacterium (Actinomyces) pyogenes, a causative agent of various pyogenic diseases in domestic animals, produces a hemolysin which is thought to be an important virulence factor. This hemolysin was purified from the culture supernatant of A. pyogenes swine isolate. The purified hemolysin showed a single band with a molecular mass of 56 kDa on SDS-polyacrylamide gel electrophoresis, and its isoelectric point was 9.2. The activity of this hemolysin was not enhanced by the addition of L-cysteine or sodium thioglycolate, but it was inhibited by cholesterol. The gene encoding the hemolysin was cloned, sequenced and expressed in Escherichia coli by means of ZAP Express vector. Analysis by SDS-polyacrylamide gel electrophoresis with immunoblotting showed that the molecular weight of the hemolysin expressed in E. coli is the same as that of the hemolysin purified from A. pyogenes. Nucleotide sequence analysis revealed an open reading frame of 1,605 bp encoding a 534 amino acid protein of 57,989 Da. The nucleotide sequence of the hemolysin gene from A. pyogenes swine isolate differed only slightly (97.6% identity) from the sequence of plo gene from A. pyogenes strain BBR1 reported by Billington et al (J. Bacteriol. 179: 6100-6106, 1997). The cysteine residue existed in the undecapeptide region of the hemolysin, which is highly conserved in thiol-activated cytolysins (cholesterol-binding cytolysins), and is replaced with alanine. Therefore, the hemolysin of A. pyogenes seems to be a novel member of the thiol-activated cytolysin family. PMID:10711593

  13. Host-derived pentapeptide affecting adhesion, proliferation, and local pH in biofilm communities composed of Streptococcus and Actinomyces species

    Drobni, M.; Li, T.; Krüger, C.;

    2006-01-01

    Salivary proline-rich proteins (PRPs) attach commensal Actinomyces and Streptococcus species to teeth. Here, gel filtration, mass spectrometry and Edman degradation were applied to show the release of a pentapeptide, RGRPQ, from PRP-1 upon proteolysis by Streptococcus gordonii. Moreover, synthetic...... catabolism to ammonia). Strains of commensal viridans streptococci exhibited PRP degradation and Arg catabolism, whereas cariogenic species did not. The RGRPQ peptide mediated via a differential Q-dependent sequence motif, adhesion inhibition, and desorption of PRP-1-binding strains of A. naeslundii...... genospecies 2 (5 of 10 strains) but not of S. gordonii (n=5). The inhibitable A. naeslundii strains alone displayed the same binding profile as S. gordonii to hybrid peptides terminating in RGRPQ or GQSPQ, derived from the middle or C-terminal segments of PRP-1. The present findings indicate the presence of a...

  14. Crystallization of the fimbrial protein FimP from Actinomyces oris and of a triple Ile-to-Met mutant engineered to facilitate selenomethionine labelling

    Crystals of FimP from A. oris were obtained. To facilitate selenomethionine labelling, three methionines were introduced by site-directed mutagenesis. Actinomyces oris is an oral bacterium important for the development of dental plaque. It expresses two forms of fimbriae: type 1 and type 2. FimP, which is the fimbrial protein that is polymerized into the stalk of the type 1 fimbriae, was cloned, overexpressed and crystallized. X-ray data were collected and processed to 2.2 Å resolution. The crystals belonged to space group P21212, with one molecule in the asymmetric unit. To facilitate structure determination using single anomalous dispersion, three methionines were introduced by site-directed mutagenesis. Crystals of selenomethionine-labelled protein were obtained by streak-seeding and diffracted to 2.0 Å resolution

  15. Coinfection by Ureaplasma spp., Photobacterium damselae and an Actinomyces-like microorganism in a bottlenose dolphin (Tursiops truncatus) with pleuropneumonia stranded along the Adriatic coast of Italy.

    Di Francesco, Gabriella; Cammà, Cesare; Curini, Valentina; Mazzariol, Sandro; Proietto, Umberto; Di Francesco, Cristina Esmeralda; Ferri, Nicola; Di Provvido, Andrea; Di Guardo, Giovanni

    2016-04-01

    A case of pleuropneumonia is reported in an adult male bottlenose dolphin (Tursiops truncatus) found stranded in 2014 along the Central Adriatic coast of Italy. A severe pyogranulomatous pneumonia and thoracic lymphadenopathy were present at necropsy. Numerous Splendore-Hoeppli bodies were found microscopically scattered throughout the lung. Histochemical evidence of Actinomyces-like organisms was obtained from the pulmonary parenchyma, with a strain of Photobacterium damselae subsp. piscicida and Ureaplasma spp. being also isolated from the same tissue. For the latter, a genome fragment of approximately 1400bp from the 16s rDNA was amplified and sequenced. BLAST analysis revealed 100% identity with an uncultured Ureaplasma spp. (JQ193826.1). PMID:27033917

  16. Fusobacterium nucleatum ATCC 10953 requires Actinomyces naeslundii ATCC 43146 for growth on saliva in a three-species community that includes Streptococcus oralis 34.

    Periasamy, Saravanan; Chalmers, Natalia I; Du-Thumm, Laurence; Kolenbrander, Paul E

    2009-05-01

    Formation of dental plaque is a developmental process involving initial and late colonizing species that form polymicrobial communities. Fusobacteria are the most numerous gram-negative bacteria in dental plaque, but they become prevalent after the initial commensal colonizers, such as streptococci and actinomyces, have established communities. The unusual ability of these bacteria to coaggregate with commensals, as well as pathogenic late colonizers, has been proposed to facilitate colonization by the latter organisms. We investigated the integration of Fusobacterium nucleatum into multispecies communities by employing two in vitro models with saliva as the sole nutritional source. In flow cell biofilms, numbers of cells were quantified using fluorescently conjugated antibodies against each species, and static biofilms were analyzed by quantitative real-time PCR (q-PCR) using species-specific primers. Unable to grow as single-species biofilms, F. nucleatum grew in two-species biofilms with Actinomyces naeslundii but not with Streptococcus oralis. However, enhanced growth of fusobacteria was observed in three-species biofilms, indicating that there was multispecies cooperation. Importantly, these community dynamics yielded an 18-fold increase in the F. nucleatum biomass between 4 h and 18 h in the flow cell inoculated with three species. q-PCR analysis of static biofilms revealed that maximum growth of the three species occurred at 24 h to 36 h. Lower numbers of cells were observed at 48 h, suggesting that saliva could not support higher cell densities as the sole nutrient. Integration of F. nucleatum into multispecies commensal communities was evident from the interdigitation of fusobacteria in coaggregates with A. naeslundii and S. oralis and from the improved growth of fusobacteria, which was dependent on the presence of A. naeslundii. PMID:19286780

  17. Effects of Fruit and Vegetable Low Molecular Mass Fractions on Gene Expression in Gingival Cells Challenged with Prevotella intermedia and Actinomyces naeslundii

    Laura Canesi

    2011-01-01

    Full Text Available Low molecular mass (LMM fractions obtained from extracts of raspberry, red chicory, and Shiitake mushrooms have been shown to be an useful source of specific antibacterial, antiadhesion/coaggregation, and antibiofilm agent(s that might be used for protection towards caries and gingivitis. In this paper, the effects of such LMM fractions on human gingival KB cells exposed to the periodontal pathogens Prevotella intermedia and Actinomyces naeslundii were evaluated. Expression of cytokeratin 18 (CK18 and β4 integrin (β4INT genes, that are involved in cell proliferation/differentiation and adhesion, and of the antimicrobial peptide β2 defensin (HβD2 in KB cells was increased upon exposure to either live or heat-killed bacteria. All LMM fractions tested prevented or reduced the induction of gene expression by P. intermedia and A. naeslundii depending on the experimental conditions. Overall, the results suggested that LMM fractions could modulate the effects of bacteria associated with periodontal disease in gingival cells.

  18. 唾液中放线菌与儿童龋病相关性的定量检测研究%Quantitative detection study of the interaction between actinomyces in saliva and caries in children

    李明博; 仪虹; 尹丽雪; 孟玲娜; 寻颖

    2012-01-01

    Objective This study aims to establish a RT-PCR method to detect Actinomyces naeslundii (An) and Actinomyces odontolyticus (Ao) and inquire into the relationship between Colonization quantity of An and Ao in saliva and dmfs. Methods We take 59 Cary Children's aliva samples, including 19 caries-free individuals (dmfs=zero), 21 mid-caries individuals (dmfs=4~6) and 19 caries-active individuals (dmfs>8). We isolate genomic DNA from bacterium, apply RT-PCR technology of SYBR Green Ⅱ to detect An and Ao in saliva and use SAS9.2 software to carry out the data processing and analyses. Results The percentage of An in three groups is quite different (P0.05); The percentage of Ao in three groups is not significantly different (P>0.05). Conclusion There is significant correlation between the amount of An in children's saliva and the onset and development of caries: and there is no significant correlation between the amount of Ao in children's saliva and the onset and development of caries.%目的 建立检测内氏放线菌(Actinomyces naeslundii,An)与龋齿放线菌(Actinomyces odontolyticus,Ao)的实时荧光定量PCR(RT-PCR).方法 探讨An和Ao在唾液中的定植数量与乳牙龋失补牙面指数(dmfs)的关系.方法 分别采集59名不同患龋状况儿童唾液样本,其中无龋组(dmfs=0) 19名、中龋组(dmfs=4~6)21名和高龋组(dmfs>8)19名.提取细菌总基因组DNA,应用SYBR GreenⅡ模式的实时荧光定量PCR技术,对唾液中的内氏放线菌及龋齿放线菌进行定量检测,所得数据应用SAS9.2统计软件进行统计学分析.结果 内氏放线菌占总菌的比例在三组中有显著差异(P<0.05),在高龋组中显著高于中龋组( P<0.0001),在中龋组与无龋组间无显著差异(P>0.05);龋齿放线菌占总菌的比例在三组中无显著差异(P>0.05).结论 儿童唾液中内氏放线菌的数量与龋病的发生发展过程有明显相关性;龋齿放线菌与儿童龋病的发生发展无明显相关性.

  19. PREVALENCE AND CORRELATION BETWEEN URINARY TRACT INFECTIONS AND THE PRESENCE OF Actinomyces suis IN THE URINE OF PREGNANT SOWS FROM SOUTH BRAZIL PREVALÊNCIA E CORRELAÇÃO ENTRE INFECÇÃO URINÁRIA E PRESENÇA DE Actinomyces suis NA URINA DE PORCAS GESTANTES DA REGIÃO SUL DO BRASIL

    Geraldo Camilo Alberton

    2007-09-01

    Full Text Available

    The main objective of this work was to determine the prevalence and correlation between urinary tract infections and the presence of Actinomyces suis in the urine of 1,745 pregnant sows in southern Brazil. Urinary infections were present in 29.54 % of the sows raised in confinement and in 16.46% of the sows raised outdoors. The overall prevalence of urinary infections was 28.31%. For the presence of A. suis, 22.24% of the sows raised in confinement and 6.71% of the sows raised outdoors had the bacteria in their urine. The prevalence of A. suis in all sows was 20.63%. Negative correlation was demonstrated between the presence of urinary infections and the presence of A. suis. In other words, sows which had urinary infections had lesser prevalence of A. suis (13.67% than those sows without urinary infections (23.12%. In the same way, sows positive for A. suis had lesser prevalence of urinary infections (17.43% than those negative for the bacteria (28.62%. Only 3.60% of the sows had urinary infection and A. suis in the urine simultaneously.

    KEY-WORDS: Swine; cystitis; reproductive disorders; pielocystitis; epidemiology.

    O presente

  20. Common antigens of streptococcal and non-streptococcal oral bacteria: immunochemical studies of extracellular and cell-wall-associated antigens from Streptococcus sanguis, Streptococcus mutans, Lactobacillus salivarius, and Actinomyces viscosus.

    Schöller, M; Klein, J P; Frank, R M

    1981-01-01

    Soluble extracellular antigens (ESA) were prepared from the culture supernatant of exponential growing cells of Streptococcus sanguis OMZ 9 by a combination of ammonium sulfate precipitation and chromatography on a Bio-Gel P6 column. Soluble cell wall antigens (WEA) were obtained from the bacterial pellet by extraction with 1 M phosphate buffer (pH 6). Antisera against whole cells of S. sanguis and S. mutans of different serotypes, 10% trichloroacetic extracts of bacterial cell walls, dextran, ESA, and WEA were prepared by injecting the different antigens several times in rabbits. ESA and WEA were prepared from a representative strain of Bratthall's seven serological groups, Lactobacillus salivarius, and Actinomyces viscosus. All sera showed various agglutinin titers against heat-killed cells, and titers were generally higher with homologous cells. The comparison of the different antigens using agar gel diffusion and immunoelectrophoresis showed the presence of extracellular common antigens in both ESA and WEA between the different strains. Absorption of anti-ESA sera with WEA, and anti-WEA sera with ESA, showed the existence of a specific antigen common to all bacteria in each fraction. Enzymatic treatment of the antigen before immunodiffusion demonstrated the protein nature of the two antigens present in ESA and WEA. Images PMID:6783541

  1. ACTINOMYCES NAESLUNDII IN PATIENTS WITH HEMATOLOGICAL MALIGNANCIES

    S. H. Rasa J. V Yusefi; F. Agha-Khani; M. Ghazanfari; R. Tohidi; F. A. Nakhjavani; F. Daee-Ghazvini; Mobedi, I

    2006-01-01

    Mycotic infections have been commonly encountered in patients with hematological malignancies. The current study seeks the prevalence of actinomycete infection in patients suffering from blood cells malignancies. A hundred and fifty patients with some kinds of blood cells dyscrasia who underwent the bone marrow aspiration were recruited. In addition to the diagnostic work up, samples were examined for the presence of actinomycete infections. Twenty one samples were positive for actinomycete i...

  2. Actinomyces naeslundii in intial dental biofilm formation

    Dige, Irene; Raarup, Merete Krog; Nyengaard, Jens Randel;

    2009-01-01

    Combined use of Confocal Laser Scanning Microscopy (CLSM) and Fluorescent in situ Hybridization (FISH) offers new opportunities for analysing the spatial relationships and temporal changes of specific members of microbial populations in intact dental biofilms. AIMS: The purpose of this study was ...... colonization in the inner part of the biofilm may have important ecological consequences. This study was supported by Aarhus University Research Foundation, The Swedish Patent Revenue Fund for Research in Preventive Odontology, and The Danish Dental Association....

  3. 木糖醇对黏性放线菌生长及产酸影响的体外研究%In vitro study of xylitol on the growth and acid production of Actinomyces viscosus

    郭厚佐; 肖遥; 廉小天; 邹玲

    2014-01-01

    Objective This research aimed to study the inhibitory effect of xylitol on the growth and acid production of Actinomyces viscosus (A. viscosus). Methods We cultivated A. viscosus in anaerobic conditions with different concentrations (128, 64, 32, 16, 8, and 4 g·L-1) of xylitol brain heart infusion liquid medium and determined the minimum inhibitory concentration (MIC). Subsequently, we measured the pH value of the control group, as well as those of 1/2, 1/4, 1/8 MIC, and MIC concentration groups at 1.5, 3, 6, 12, 24, and 48 h. The ΔpH and OD550 at 2, 4, 6, 8, 10, and 12 h were calculated. We discovered that the minimum xylitol concentrations suppressed 50% and 90% A. viscosus biofilm formation (i.e., MBIC50 and MBIC90). SPSS 19.0 was used to analyze the collected data, and conclusions were drawn afterward. Results Xylitol inhibited the growth of A. viscosus at MIC of 64 g·L-1. After 12 h, the differences of pH value among groups were all statistically significant (P0.05), and OD550 also increased when the MIC concentration decreased. These results imply that the ability of A. viscosus to grow and produce acid in 1/2 MIC and MIC conditions will be reduced with the increase in xylitol concentration. The value of MIBC50 was 64 g·L-1, whereas the value of MIBC90 was 128 g·L-1. This finding indicates that the xylitol medium can restrict A. viscosus biofilm formation. Conclusion Xylitolcan effectively inhibit the growth, adhesion, and acid production of A. viscosus, protecting teeth from cariogenic bacteria and preventing caries to a certain extent.%目的:对比不同质量浓度下木糖醇对黏性放线菌生长及产酸的影响。方法分别用含不同质量浓度(128、64、32、16、8、4g·L-1)木糖醇的脑心浸液(BHI)液体培养基在厌氧条件下培养黏性放线菌,测定其最小抑菌质量浓度(MIC);然后测量对照组以及1/2、1/4、1/8MIC和MIC质量浓度时培养1.5、3、6、12、24、48h液体培养基的pH值

  4. Isolation and characterization of coaggregation-defective mutants of Actinomyces viscosus, Actinomyces naeslundii, and Streptococcus sanguis.

    Kolenbrander, P. E.

    1982-01-01

    Spontaneously occurring coaggregation-defective (COG-) mutants of oral actinomycetes and streptococci were isolated and used to study interactions between cells of these two kinds of bacteria. COG- mutants of each kind of bacteria were isolated by a simple enrichment scheme. Parent strains were mixed with a coaggregating partner strain, coaggregated cells were removed by low-speed centrifugation, and non-coaggregated cells were recycled by the addition of more partner strain cells. COG- mutan...

  5. Actinomyces naeslundii: A rare cause of chronic purulent canaliculitis.

    Prabhu, Kavitha; Terrence Rohan CHINNIAH; Nayan JOSHI; Ali, Nadir Ali Mohamed; Mohan RAMALINGAM; Francis, Irimpan Lazar; Pemasari Upali TELISINGHE

    2013-01-01

    Chronic canaliculitis is an uncommon disease with a protracted course. Its management is prolonged and difficult. An elderly lady was diagnosed to have left lower chronic purulent canaliculitis. Conservative treatment alone did not effect a complete cure. Canaliculotomy with removal of sulphur granules and canalicular curettage also had to be performed to achieve a permanent cure. Unlike many cases of canaliculitis, this patient presented numerous complications confined to the canaliculus. T...

  6. Actinomyces and Nocardia Infections in Chronic Granulomatous Disease

    Shahindokht Bassiri-Jahromi; Aida Doostkam

    2011-01-01

    Objective : Chronic granulomatous disease (CGD) is an inherited disorder of the Nicotinamide adenine dinucleotide phosphate reduced oxidase complex characterized by recurrent bacterial and fungal infections. Disseminated infection by combination of opportunistic agents is being increasingly reported in CGD patients. We presented in the retrospective review of medical records, the etiology, presentation, clinical characteristics the infections detected, predisposing condition and outcome of no...

  7. Carbon dioxide metabolism by Actinomyces viscosus: pathways for succinate and aspartate production.

    Brown, A T; Breeding, L C

    1980-01-01

    14C-labeled bicarbonate was incorporated into trichloroacetic acid-insoluble material by cell suspensions of A. viscosus strain M100 and also into the four-carbon fermentation product, succinate, but not into the three-carbon fermentation product, lactate. The initial step in the conversion of 14C-labeled bicarbonate into both trichloroacetic acid-insoluble material and succinate was catalyzed by the enzyme phosphoenolypyruvate carboxylase, which served to convert the glycolytic intermediate,...

  8. Relative adherence of Bacteroides species and strains to Actinomyces viscosus on saliva-coated hydroxyapatite

    The study was designed to compare the adherence of several Bacteroides species to A. viscosus. Using 3H, we labeled 24 laboratory strains, including 13 Bacteroides species and 11 fresh clinical isolates of three Bacteroides species. Their adherence to A. viscosus bound to a saliva-coated mineral surface was quantified by liquid scintillation. Adherence relative to a standard strain, B. gingivalis 2561, was compared. Among the lab bacteroides, those of B. gingivalis (eight strains) were the greatest binders (mean, 80.5 ± 12.4%). Strains of other lab bacteroides bound less well (mean, 33.4 ± 6.3%). The difference in means was statistically significant (p less than 0.01). The mean for B. gingivalis strains was also significantly greater than that for strains of B. intermedius (51.7 ± 6.2%). Attachment of B. gingivalis was saturable in experiments in which either input concentration or time was the independent variable, indicating that B. gingivalis cells do not accumulate in this vitro simulation of plaque formation by binding to each other. Subculture did not seem to affect the degree of binding

  9. Pilonidal Sinus of the Glans Penis Associated with Actinomyces Case Reports and Review of Literature

    Shylashree Chikkamuniyappa; Jaime Furman; Rolf Sjuve Scott

    2004-01-01

    Pilonidal sinus is a well-recognized condition that occurs most commonly in the sacrococcygeal area of younger men. It is hypothesized to be an acquired chronic inflammation condition due mainly to hair trapped beneath the surface. A pilonidal sinus in the sacrococcygeal region is associated with recurrent infection, abscess formation, cellulitis, fistulae, and rarely, squamous cell carcinoma. A pilonidal sinus of the penis is a rare entity. The association of a penile pilonidal cyst and Acti...

  10. Antimicrobial Effect of Lactobacillus reuteri on Cariogenic Bacteria Streptococcus gordonii, Streptococcus mutans, and Periodontal Diseases Actinomyces naeslundii and Tannerella forsythia.

    Baca-Castañón, Magda Lorena; De la Garza-Ramos, Myriam Angélica; Alcázar-Pizaña, Andrea Guadalupe; Grondin, Yohann; Coronado-Mendoza, Anahí; Sánchez-Najera, Rosa Isela; Cárdenas-Estrada, Eloy; Medina-De la Garza, Carlos Eduardo; Escamilla-García, Erandi

    2015-03-01

    Lactic acid bacteria (LAB) are well known for their beneficial effects on human health in the intestine and immune system; however, there are few studies on the impact they can generate in oral health. The aim of this study was to test and compare in vitro antimicrobial activity of L. reuteri on pathogenic bacteria involved in the formation of dental caries: S. mutans, S. gordonii, and periodontal disease: A. naeslundii and T. forsythia. Also, we determined the growth kinetics of each bacterium involved in this study. Before determining the antimicrobial action of L. reuteri on cariogenic bacteria and periodontal disease, the behavior and cell development time of each pathogenic bacterium were studied. Once the conditions for good cell growth of each of selected pathogens were established according to their metabolic requirements, maximum exponential growth was determined, this being the reference point for analyzing the development or inhibition by LAB using the Kirby Bauer method. Chlorhexidine 0.12% was positive control. L. reuteri was shown to have an inhibitory effect against S. mutans, followed by T. forsythia and S. gordonii, and a less significant effect against A. naeslundii. Regarding the effect shown by L. reuteri on the two major pathogens, we consider its potential use as a possible functional food in the prevention or treatment of oral diseases. PMID:25422124

  11. Large Bowel Obstruction in a Young Woman Simulating a Malignant Neoplasm: A Case Report of Actinomyces Infection

    R. Nissi

    2013-01-01

    Full Text Available Pelvic and intra-abdominal Actinomycosis can be difficult to diagnose preoperatively and it may also mimic many other diseases, including malignancies. We present a patient with pelvic Actinomycosis probably caused by a long-standing intrauterine device (IUD. We emphasize the challenges in diagnostic process and stress that though a rare disease, intra-abdominal Actinomycosis should be suspected in cases with intra-abdominal mass of uncertain etiology. The early recognition may spare the patient from extensive surgical operation.

  12. Lactate dehydrogenase from Streptococcus mutans: purification, characterization, and crossed antigenicity with lactate dehydrogenases from Lactobacillus casei, Actinomyces viscosus, and Streptococcus sanguis.

    Sommer, P; Klein, J P; Schöller, M; Van Frank, R M

    1985-01-01

    A cytoplasmic fructose-1,6-diphosphate-dependent lactate dehydrogenase (LDH; EC 1.1.1.27) from Streptococcus mutans OMZ175 was purified to homogeneity as judged by sodium dodecyl sulfate-gel electrophoresis. The purification consisted of ammonium sulfate precipitation of the cytoplasmic fraction, DEAE-Sephacel and Blue-Sepharose CL.6B chromatography, and Sephacryl S200 gel permeation. The catalytic activity of the purified enzyme required the presence of fructose-1,6-diphosphate with a broad ...

  13. Effects of fruit and vegetable low molecular mass fractions on gene expression in gingival cells challenged with Prevotella intermedia and Actinomyces naeslundii

    L. Canesi; C. Borghi; M. Stauder; P. Lingström; A. Papetti; J. Pratten; C. Signoretto; D.A. Spratt; M. Wilson; E. Zaura; C. Pruzzo

    2011-01-01

    Low molecular mass (LMM) fractions obtained from extracts of raspberry, red chicory, and Shiitake mushrooms have been shown to be an useful source of specific antibacterial, antiadhesion/coaggregation, and antibiofilm agent(s) that might be used for protection towards caries and gingivitis. In this

  14. Detection of sialidase (neuraminidase) activity in Actinomyces species by using 2'-(4-methylumbelliferyl)alpha-D-N-acetylneuraminic acid in a filter paper spot test.

    Moncla, B. J.; Braham, P

    1989-01-01

    A rapid method for the detection of acetylneuraminyl hydrolase, EC 3.2.1.18 (sialidase or neuraminidase), was developed by using 2'-(4-methylumbelliferyl)alpha-D-N-acetylneuraminic acid as substrate in a filter paper spot test. The method was compared to conventional assays that use 2'-(4-methylumbelliferyl)alpha-D-N-acetylneuraminic acid and bovine submaxillary mucin and was found to be in excellent agreement. Organisms with greater than 10 U of enzyme activity (in nanomoles per minute per m...

  15. Osteomyelitis of a long bone due to Fusobacterium nucleatum and Actinomyces meyeri in an immunocompetent adult: A case report and literature review

    Lee Min

    2012-07-01

    Full Text Available Abstract Background Fusobacterium species are uncommon causes of osteomyelitis. These organisms are normal flora of the oral cavity. Therefore, they mostly cause osteomyelitis of the head and neck. Hematogenous osteomyelitis at distant sites other than the head and neck has rarely been reported in pediatric or immunocompromised patients. Here, we report the first case of osteomyelitis of a long bone combined with a muscle abscess due to Fusobacterium nucleatum in an otherwise healthy adult. Case presentation A 59-year-old Korean man was admitted for pain and swelling of the right lower leg, which had been persistent for two weeks. Magnetic resonance imaging showed osteomyelitis of the right fibula with a surrounding muscle abscess of the right lower leg. Incision and drainage was performed, and repetitive tissue cultures grew F. nucleatum. In this patient, it was presumed that recurrent periodontitis caused hematogenous seeding of F. nucleatum to a distant site leading to osteomyelitis with a muscle abscess. The patient was successfully treated with intravenous ampicillin-sulbactam for three weeks and oral amoxicillin-clavulanate for eight weeks. He also underwent repeated surgical drainage. He has no evidence of recurrence after seven months of follow-up. Conclusions Clinicians should be aware that F. nucleatum could be the etiologic agent of hematogenous osteomyelitis of a long bone in an immunocompetent patient.

  16. Osteomyelitis of a long bone due to Fusobacterium nucleatum and Actinomyces meyeri in an immunocompetent adult: A case report and literature review

    Lee Min; Ha Young; Park Hye; Lee Jun; Lee Yoon; Sung Ki; Kang Cheol-In; Chung Doo; Song Jae-Hoon; Peck Kyong

    2012-01-01

    Abstract Background Fusobacterium species are uncommon causes of osteomyelitis. These organisms are normal flora of the oral cavity. Therefore, they mostly cause osteomyelitis of the head and neck. Hematogenous osteomyelitis at distant sites other than the head and neck has rarely been reported in pediatric or immunocompromised patients. Here, we report the first case of osteomyelitis of a long bone combined with a muscle abscess due to Fusobacterium nucleatum in an otherwise healthy adult. C...

  17. Lactose-reversible coaggregation between oral actinomycetes and Streptococcus sanguis.

    Kolenbrander, P. E.; Williams, B L

    1981-01-01

    Freshly isolated strains of oral actinomycetes were obtained from human dental plaque and were tested for the ability to coaggregate with common laboratory stock strains of Streptococcus sanguis. Strains belonging to the genera Actinomyces, Arachnia, Bifidobacterium, and Bacterionema were isolated. Only members of the genus Actinomyces coaggregated with the streptococci, and only Actinomyces viscosus and Actinomyces naeslundii exhibited lactose-reversible interactions. A total of 61 strains, ...

  18. The genotypic diversity of oral Actinomyces naeslundii of root caries in aged people%老年人根面菌斑内氏放线菌临床分离株基因型多样性分析

    郭斌; 杨帆; 贾岳; 夏茜; 周学东

    2010-01-01

    目的 分析老年人根面菌斑中内氏放线菌临床株的基因型多样性,探讨内氏放线菌基因型与根面龋的关系.方法 选择老年根面龋患者20例设为根面龋组,无根面龋老年人20例设为无龋组.根面龋组以暴露的无龋根面和根面龋损部位为取样位点,无龋组以暴露的根面为取样位点,刮取菌斑进行临床株的分离鉴定,并利用基因外重复回文序列聚合酶链反应(REP-PCR)分析内氏放线菌基因型的多样性.结果 2组共分离出内氏放线菌290株,选择156株进行REP-PCR分析,分离出61个不同的基因型.根面龋组无龋根面分离的57株内氏放线菌有25个基因型,根面龋损部位分离的34株有25个基因型,无龋组分离的65株有26个基因型:内氏放线菌基因型存在多样性.单个取样位点的基因型数目存在差异(P<0.05).结论 多种基因型的内氏放线菌参与了根面龋的发生.

  19. The abstraction and identification of oral actinomyces naeslundii of root caries in aged people%老年人根面龋菌斑内氏放线菌临床株的分离与鉴定

    贾岳; 杨帆; 夏茜; 刘静; 郭斌

    2009-01-01

    目的: 分析内氏放线菌在根面龋老年患者与无根面龋老年人中的分布状况,初步探讨内氏放线菌与根面龋的相关关系.方法:根据纳入标准从临床就诊老年人中随机选择老年根面龋患者及无根面龋老年人各20名.根面龋患者每位受检者选择2个菌斑取样位点:A点为暴露的无龋根面;B点为根面龋龋坏部位.无根面龋老年人每位受检者选择1个菌斑取样位点(C点):暴露的根面.刮取根面菌斑,螺旋接种仪接种,BHI培养、分离并生化鉴定内氏放线菌.结果 :老年根面龋患者的龋坏根面、无龋根面以及无根龋老年人的暴露根面,内氏放线菌检出率无明显差异(P>0.05),内氏放线菌检出量有差异(P<0.05).数目由高到低依次为:无根面龋老年人牙根面,根龋患者无龋根面,根龋患者龋坏根面.结论 :内氏放线菌在老年人根面有较高的检出率,与根面龋密切相关.而检出量有差异,根面龋损部位内氏放线菌检出量低于根面龋患者无龋根面以及无根面龋老年人牙根面.

  20. 影响内氏放线菌尿素酶活性相关因素的初步研究%The Primary Research on Relevant Factors Influencing Urease Activity of Actinomyces naeslundii

    刘娅玲; 胡涛; 张静仪; 周学东

    2007-01-01

    目的 探讨多种生态环境因素对内氏放线菌尿素酶活性的影响.方法 采用生物化学的方法检测氮源物质、糖源物质、酸性环境对内氏放线菌尿素酶活性的影响.结果 当细菌生长环境中pH值呈弱酸性、或氮源物质缺乏或糖源物质丰富,内氏放线菌尿素酶活性均有不同程度提高.在pH6.0,氮源缺乏而糖源丰富的培养条件下,内氏放线菌尿素酶活性可高达149.7 nmol/min·mg cell protein.结论 氮源物质、糖源物质、pH值均是影响内氏放线菌尿素酶活性的环境因素;当牙菌斑致龋性增强时,内氏放线菌尿素活性表达可能也随之提高.

  1. 尿素水解对内氏放线菌增殖及耐酸力的影响%The effect of ureolysis on the proliferation and acid-resistance of Actinomyces naeslundii

    刘娅玲; 胡涛; 周学东

    2006-01-01

    目的:通过研究尿素水解对内氏放线菌的生长和耐酸能力的影响,了解尿素水解对内氏放线菌的生理作用.方法:比较内氏放线菌利用尿素或其它物质作为氮源的生长浊度;采用耐酸实验研究尿素水解与细菌耐酸能力的关系.结果:与其他口腔中常见氮源物质相比,尿素可以促进内氏放线菌生长,获得更高的A值;在临床牙菌斑能够检测到的pH 4.0~7.0范围内,尿素水解可以提高内氏放线菌的耐酸性,在pH 3.0,尿素水解对细菌没有保护作用.结论:尿素水解可以促进内氏放线菌生长,提高酸性环境中细菌的耐酸能力,增强细菌的生存竞争力.

  2. 42 CFR 493.945 - Cytology; gynecologic examinations.

    2010-10-01

    ... limits. (2) Infection other than Human Papillomavirus (HPV) (e.g., Trichomonas vaginalis, changes or morphology consistent with Candida spp., Actinomyces spp. or Herpes simplex virus). (3) Reactive...

  3. In vitro antiplaque activity of octenidine dihydrochloride (WIN 41464-2) against preformed plaques of selected oral plaque-forming microorganisms.

    Slee, A M; O'Connor, J R

    1983-01-01

    The antibacterial activity of octenidine dihydrochloride (WIN 41464-2) against intact preformed in vitro plaques of four indigenous oral plaque-forming microorganisms, Streptococcus mutans, Streptococcus sanguis, Actinomyces viscosus, and Actinomyces naeslundii, was studied. Both absolute (plaque bactericidal index) and relative (chlorhexidine coefficient) indices of antiplaque efficacy were established. Octenidine dihydrochloride compared favorably with chlorhexidine digluconate with respect...

  4. NCBI nr-aa BLAST: CBRC-OPRI-01-1136 [SEVENS

    Full Text Available CBRC-OPRI-01-1136 ref|ZP_03928135.1| conserved hypothetical protein [Actinomyces urogenital...is DSM 15434] gb|EEH64996.1| conserved hypothetical protein [Actinomyces urogenitalis DSM 15434] ZP_03928135.1 0.018 23% ...

  5. NCBI nr-aa BLAST: CBRC-TTRU-01-0430 [SEVENS

    Full Text Available CBRC-TTRU-01-0430 ref|ZP_03925656.1| integral membrane protein [Actinomyces coleocanis... DSM 15436] gb|EEH63593.1| integral membrane protein [Actinomyces coleocanis DSM 15436] ZP_03925656.1 0.17 22% ...

  6. Bacteriology of Experimental Gingivitis in Young Adult Humans

    1983-01-01

    From replicate trials of experimental gingivitis in four periodontally healthy subjects, 166 bacterial species and subspecies were detected among 3,034 randomly selected isolates from 96 samples. Of these bacteria, Actinomyces naeslundii (serotype III and phenotypically similar strains that were unreactive with available antisera), Actinomyces odontolyticus (serotype I and phenotypically similar strains that were unreactive with available antisera), Fusobacterium nucleatum, Lactobacillus spec...

  7. [Dissertations 25 years after date 21. Enhancing resistance to bacteria with chlorhexidine varnish and probiotics].

    Schaeken, M J M

    2010-02-01

    The aim of the research described in 'Chemotherapy against Streptococcus mutans' was to increase colonization resistance against mutans streptococci by inoculating Actinomyces naeslundii on the dentition. Actinomyces naeslundii established better after chlorhexidine application than after dental cleansing only but did not exceed the 1% level of the total actinomyces population. This was insufficient to increase the colonization resistance against mutans streptococci. A 33% chlorhexidine varnish was developed. After a single short-term application of the varnish all plaque bacteria were erased. After several hours Streptococcus sanguinis, Streptococcus oralis, Streptococcus mitis and Streptococcus gordonii re-established on the surface. Actinomyces naeslundii recovered later, but often with higher numbers. Mutans streptococci remained suppressed for months. This led to less acid production in dental plaque and caries reduction. The combination of mechanical cleansing and varnish application resulted in additional pocket reduction. Recently, attention is also established for research on the application ofprobiotics in periodotology. PMID:20225702

  8. A preliminary study of the modulation of Actinomyces naeslundii urease to the pH balance of dental biofilm%内氏放线菌尿素酶对牙菌斑生物膜酸碱平衡调节作用的初步研究

    刘娅玲; 胡涛; 张静仪; 周学东

    2005-01-01

    目的:初步探讨在牙菌斑生物膜天然环境中,内氏放线菌尿素酶能否发挥高效尿素水解反应,以及尿素水解对口腔环境中pH值的调节作用.方法:通过酶促反应动力学实验寻找内氏放线菌尿素水解的最适条件,监测尿素水解调节细菌产酸后的pH值变化.采用SPSS软件包,对酶促动力学实验数据进行线性回归与相关分析.结果:内氏放线菌尿素酶米氏常数Km--7.5mmol/L,在口腔中正常尿素浓度3~10mmol/L范围内,内氏放线菌尿素酶催化活性大约保持在最大活性的20%~63%;内氏放线菌尿素酶最适pH值=6.5,但是在牙菌斑临界pH 5.0,尿素酶活性仍保持40%的最大活性;在口腔正常尿素浓度范围内,内氏放线菌尿素水解产物中和细菌产酸后,pH值不会下降到牙菌斑临界pH 5.0以下.结论:在牙菌斑生物膜中,内氏放线菌尿素酶可以发挥高效尿素水解反应,尿素水解对口腔环境pH值具有明显的调节作用.

  9. In vitro study on the effect of few kinds of Natural Medicine on the growth and acid production of Actinomyces Naeslundii%部分天然药物对内氏放线菌生长和产酸影响的体外研究

    黄正蔚; 周学东; 肖悦; 刘天佳; 李罡

    2002-01-01

    目的:研究不同天然药物对内氏放线菌生长和产酸的影响.方法:选用内氏放线菌WVU627作为实验菌株.测定川芎、血藤、五倍子等11种天然药物的最低抑菌浓度MIC.再测经实验后的最终pH.结果:当药物浓度低于或等于8.000mg/ml时,各种药物对内氏放线菌的生长都有一定的抑制作用,五倍子较强.槟榔、茶多酚、川芎、大黄、蜂房、黄芩、三七、血藤、五倍子和儿茶对内氏放线菌的产酸具有一定的抑制能力,而白芷没有明显的抑制作用.结论:槟榔、茶多酚、川芎、大黄、蜂房、黄芩、三七、血藤、五倍子和儿茶对内氏放线菌的生长和产酸都有一定的抑制作用.

  10. Effects of nickel ions out from Ni-Cr metal-ceramic alloy on glycolysis and ureolytic activity of Actinomyces naeslundii%镍铬合金析出的镍离子对内氏放线菌糖代谢和尿素代谢的影响

    张正仪; 盛祖立; 刘蔚; 孙平; 吴刚; 陆瑛; 祝焕明; 严杰

    2005-01-01

    目的研究镍铬合金析出的镍离子对内氏放线菌糖代谢和尿素代谢的影响.方法分别用含0.260 mg/L和0.625mg/L镍离子的BHI培养基厌氧培养内氏放线菌WVU45型菌株,计算pH的变化值,检测乳酸脱氢酶(LDH)含量,测定尿素酶活性.结果镍离子对内氏放线菌产酸和产乳酸脱氢酶的作用不明显(P>0.05),对尿素酶活性有促进作用(P<0.05).结论镍铬合金析出的镍离子可以增加内氏放线菌尿素酶活性,促进尿素代谢.

  11. Production of IL-1β, TNF-α, and IL-6 in Fibroblast L929 Cells Induced by Fimbriae from Actinomyces Naeslundii ATCC 19246%内氏放线菌株ATCC 19246菌毛诱导成纤维细胞L929产生IL-1β,IL-6 TNR-α的研究

    李炜玲; 辛毅; 赵丽娟

    2008-01-01

    目的 提取内氏放线菌菌毛,并检测内氏放线菌菌毛是否能引起成纤维细胞表达释放IL-1β,IL-6,TNF-α.方法 用搅拌法提取内氏放线菌19246菌毛,电镜鉴定菌毛的纯度,用提取的菌毛诱导小鼠成纤维细胞L929.48 h 后收集细胞培养上清,Western-blotting分别检测细胞培养上清中IL-1β,IL-6,TNF-α.结果 电镜负染观察显示内氏放线菌菌毛与菌体充分分离,得到菌毛粗提物.Western-blotting结果显示菌毛处理过的细胞培养基中可检测到IL-1β、TNF-α、IL-6,而未经菌毛处理过的细胞培养基中未见IL-1β、TNF-α、IL-6.结论 内氏放线菌19246菌毛初提物可以诱导L929细胞产生IL-1β、TNF-α、IL-6.

  12. 海洋放线菌A3202的分离鉴定及其对柑橘采后病害的防效%Isolation and identification of marine actinomyces A3202 and its control efficacy against postharvest citrus diseases

    鹿连明; 杜丹超; 程保平; 胡秀荣; 陈国庆

    2014-01-01

    为获得用于防治柑橘采后病害的海洋放线菌,以柑橘青霉病菌Penicillium italicum、柑橘绿霉病菌P.digitatum和柑橘炭疽病菌Colletotrichum gloeosporioides为指示菌,对分离到的25株海洋放线菌进行筛选.通过平板对峙法测定拮抗菌株的抑菌谱,并测定其发酵产物粗提物对柑橘果实采后病害的防效,根据形态特征、培养特征、生理生化特征及16S rDNA序列对其进行鉴定.结果表明,分离自鳞笠藤壶Tetraclita squamosa的菌株A3202对3种指示菌均具有强抑菌活性,对供试13种植物病原菌的菌丝生长具有不同程度的抑制作用,尤其对柑橘青霉病菌和柑橘绿霉病菌的抑制作用最强,抑菌带宽度分别可达2.33±0.05 cm和2.32±0.10cm.该菌株800 mg/L粗提物溶液对接种后7d的柑橘青霉病、柑橘绿霉病和柑橘炭疽病的相对防效均可达100%.初步鉴定该菌株为放线菌中的米修链霉菌Streptomyces misionensis.

  13. Palatal Actinomycosis and Kaposi Sarcoma in an HIV-Infected Subject with Disseminated Mycobacterium avium-intracellulare Infection

    Yuria Ablanedo-Terrazas

    2012-01-01

    Full Text Available Actinomyces and Mycobacterium avium-intracellulare are facultative intracellular organisms, members of the bacterial order actinomycetales. Although Actinomyces can behave as copathogen when anatomic barriers are compromised, its coinfection with Mycobacterium avium-intracellulare has not previously been reported. We present the first reported case of palatal actinomycosis co-infection with disseminated MAC, in an HIV-infected subject with Kaposi sarcoma and diabetes. We discuss the pathogenesis of the complex condition of this subject.

  14. Properties of a Gram-Posi tive Bacteriolytic Activity from an Oral Clinical Isolate

    Grenier, D

    2011-01-01

    The aim of this study was to characterise an oral bacterial isolate possessing extracellular bacteriolytic activity and to determine the basic properties of this activity. The lytic strain L1 was a gram-positive pleomorphic rod that grew only under anaerobic conditions. Glucose and raffinose were fermented whereas catalase and urease were not produced. The activity spectrum of a crude lytic fraction was restricted to strains of Actinomyces naeslundii and Actinomyces viscosus. On the basis of ...

  15. Prevalence of viridans streptococci exhibiting lactose-inhibitable coaggregation with oral actinomycetes.

    Kolenbrander, P E; Williams, B L

    1983-01-01

    Fresh oral isolates from human dental plaque were selected on the basis of their spherical morphology. In a double-blind experiment, their species identity and ability to coaggregate with human oral Actinomyces viscosus and Actinomyces naeslundii were determined. Of the 110 isolates characterized, 30 were identified as either Streptococcus mutans, Streptococcus anginosus-constellatus, or Veillonella parvula; none of these coaggregated with the actinomycetes. The remaining 80 isolates were ide...

  16. Biocomputational prediction of small non-coding RNAs in Streptomyces

    Basler Marek

    2008-05-01

    Full Text Available Abstract Background The first systematic study of small non-coding RNAs (sRNA, ncRNA in Streptomyces is presented. Except for a few exceptions, the Streptomyces sRNAs, as well as the sRNAs in other genera of the Actinomyces group, have remained unstudied. This study was based on sequence conservation in intergenic regions of Streptomyces, localization of transcription termination factors, and genomic arrangement of genes flanking the predicted sRNAs. Results Thirty-two potential sRNAs in Streptomyces were predicted. Of these, expression of 20 was detected by microarrays and RT-PCR. The prediction was validated by a structure based computational approach. Two predicted sRNAs were found to be terminated by transcription termination factors different from the Rho-independent terminators. One predicted sRNA was identified computationally with high probability as a Streptomyces 6S RNA. Out of the 32 predicted sRNAs, 24 were found to be structurally dissimilar from known sRNAs. Conclusion Streptomyces is the largest genus of Actinomyces, whose sRNAs have not been studied. The Actinomyces is a group of bacterial species with unique genomes and phenotypes. Therefore, in Actinomyces, new unique bacterial sRNAs may be identified. The sequence and structural dissimilarity of the predicted Streptomyces sRNAs demonstrated by this study serve as the first evidence of the uniqueness of Actinomyces sRNAs.

  17. Production of interleukin-1β, interleukin-6 and tumor necrosis factor α in cultured human fibroblast with stimulation of abstract from Actinomyces naeslundii ATCC19246%内氏放线菌细胞壁成分诱导人成纤维细胞产生白细胞介素-1β、-6和肿瘤坏死因子α的研究

    赵丽娟; 李文; 郑燕

    2008-01-01

    目的 探讨内氏放线菌菌株ATCC19246细胞壁成分能否诱导人成纤维细胞产生白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)、肿瘤坏死因子α(TNFα).方法 采用提取脂磷壁酸(LTA)的方法 提取内氏放线菌菌株ATCC19246细胞壁成分,用3种质量浓度(分别为1、10、100 mg/mL)提取物分别刺激人成纤维细胞THP-1细胞株,用ELISA方法 测定细胞培养上清中的IL-1β、IL-6、TNFα.结果 THP-1细胞株可以产生一定量的IL-1β、IL-6、TNFα,以质量浓度为10 mg/mL时诱导产生的量最高.结论 内氏放线菌细胞壁提取物可以诱导THP-1细胞株产生IL-1β、IL-6、TNFα,但随着质量浓度变化产生的量存在差异.

  18. [Rare infection--prolonged A. naeslundii bacteremia caused by severe caries].

    Abozaid, Said; Peretz, Avi; Nasser, Wael; Zarfin, Yehoshua

    2013-07-01

    Actinomyces is an anaerobic, gram positive, rod shape bacteria that doesn't create spores. Actinomyces is part of the mouth, intestines, vagina and upper respiratory system flora. The infection appears mostly on the face, neck, abdomen and pelvis in cases of mucosa injury and most common in immunosuppressed patients. The spread of Actinomyces through the blood system is rare. In this article we present a 9 year old male patient with no history of diseases who was diagnosed with prolonged bacteremia of A. naeslundii without specific infection excluding severe caries. Characterization of bacteria from the blood culture was performed by molecular biology and the patient was treated with Ampicillin and tooth extraction that led to the disappearance of the bacteremia. PMID:23957079

  19. Actinomycosis pleura-pulmonary. Report of case and literature revision

    Actinomyces are gram-positive aerobic-growing bacteria that are part of human bacterial flora. Actinomyces infections, which are more prevalent among men than among women (3:1), usually affect patients in their fourth decade and most often involve A. israelli (85%). thoracic, abdominal or pelvic actinomycosis is uncommon. Pulmonary infections result more from aspiration of oral secretions than from direct extension. We report one case of necrotizing pneumonia of a patient with previous stab wound injury in the affected hemi thorax and an unusual aggressive behavior

  20. Does dental biofilm accumulation differ between night and day?

    Dige, Irene; Nyvad, Bente

    standardized glass slabs mounted in intra-oral appliances and worn by eight individuals for 12-h during day and night, respectively. Subsequently, fluorescent in situ hybridization was performed using probes against Streptococcus spp., Actinomyces naeslundii, and all bacteria and analysed by confocal laser...

  1. Spinal actinomycosis: A rare disease

    Dua Rakesh

    2010-01-01

    Full Text Available Actinomycosis is an indolent, slowly progressive infection caused by Actinomyces species. Of human actinomycosis, the spinal form is rare and actinomycosis-related spinal neurological deficit is uncommon. We report two cases with cervical and dorsal actinomycosis and one of them with spinal neurological deficit.

  2. Multiparameter Assessments To Determine the Effects of Sugars and Antimicrobials on a Polymicrobial Oral Biofilm

    Yang, Ying; Sreenivasan, Prem K; Subramanyam, Ravi; Cummins, Diane

    2006-01-01

    Clinical studies indicate relationships between dental plaque, a naturally formed biofilm, and oral diseases. The crucial role of nonmicrobial biofilm constituents in maintaining biofilm structure and biofilm-specific attributes, such as resistance to shear and viscoelasticity, is increasingly recognized. Concurrent analyses of the diverse nonmicrobial biofilm components for multiparameter assessments formed the focus of this investigation. Comparable numbers of Actinomyces viscosus, Streptoc...

  3. Effects of amine fluoride on biofilm growth and salivary pellicles

    Van der Mei, HC; Engels, E; de Vries, Jacob; Busscher, HJ

    2008-01-01

    The amine fluoride (AmF) N'-octadecyltrimethylendiamine-N, N,N'-tris(2-ethanol)-dihydrofluoride is a cationic antimicrobial which can have beneficial effects on plaque formation. Here, we determine changes in pellicle and bacterial cell surface properties of the strains Actinomyces naeslundii HM1, S

  4. Antimicrobial Activity of Protamine against Oral Microorganisms.

    Kim, Yeon-Hee; Kim, Sang Moo; Lee, Si Young

    2015-01-01

    Protamine is an arginine-rich polycationic protein extracted from sperm cells of vertebrates including fishes such as salmon. The purpose of this study was to investigate the suppressive effects of protamine on the growth of oral pathogens for possible usage in dental materials. Minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) were determined by the microdilution method. Twelve strains of oral viridans streptococci, Actinomyces naeslundii, Actinomyces odontolyticus, Enterococcus faecalis, Lactobacillus acidophilus, Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas gingivalis and Candida albicans were suppressed by protamine. MIC and MBC values were between 0.009 ~ 20 mg/mL and 0.019 ~ 80 mg/mL, respectively. The bactericidal activities of protamine against susceptible bacterial species were dependent on the concentration of protamine and incubation time. Based on the results of this study, protamine would be a useful compound for the development of antimicrobial agents against oral pathogens in dental materials. PMID:26699859

  5. Antimicrobial Activity of Diterpenes from Viguiera arenaria against Endodontic Bacteria

    Carlos H. G. Martins

    2011-01-01

    Full Text Available Six pimarane-type diterpenes isolated from Viguiera arenaria Baker and two semi-synthetic derivatives were evaluated in vitro against a panel of representative microorganisms responsible for dental root canal infections. The microdilution method was used for the determination of the minimum inhibitory concentration (MIC and minimum bactericidal concentration (MBC against Porphyromonas gingivalis, Prevotella nigrescens, Prevotella intermedia, Prevotella buccae, Fusobacterium nucleatum, Bacteroides fragilis, Actinomyces naeslundii, Actinomyces viscosus, Peptostreptococcus micros, Enterococcus faecalis and Aggregatibacter actinomycetemcomitans. The compounds ent-pimara-8(14,15-dien-19-oic acid, its sodium salt and ent-8(14,15-pimaradien-3β-ol were the most active, displaying MIC values ranging from 1 to 10 μg mL-1. The results also allow us to conclude that minor structural differences among these diterpenes significantly influence their antimicrobial activity, bringing new perspectives to the discovery of new chemicals for use as a complement to instrumental endodontic procedures.

  6. Analysis of phosphate-accumulating organisms cultivated under different carbon sources with polymerase chain reaction-denaturing gradient gel electrophoresis assay

    YU Shui-li; LIU Ya-nan; JING Guo-lin; ZHAO Bing-jie; GUO Si-yuan

    2005-01-01

    To investigate the microbial communities of microorganisms cultivated under different carbon sources, three sequencing batch reactors were operated. They were supplied with sewage, glucose and sodium acetate as carbon sources respectively and showed high phosphorus removal performance. The results of denaturing gradient gel electrophoresis(DGGE) of polymerase chain reaction-amplified (PCR) 16S rDNA fragments demonstrated that β-protebacteria, Actinomyces sp. and γ-protebacteria only exited in 1 # reactor. The microbiological diversity of 1 # reactor exceeded the other two reactors. Flavobacterium, Bacillales, Actinomyces, Actinobacteridae and uncultured bacteria(AF527584, AF502204, AY592749, AB076862, AJ619051, AF495454 and AY133070) could be detected in the biological phosphorus removal reactors.

  7. Bovine milk osteopontin - Targeting bacterial adhesion for biofilm control

    Kristensen, Mathilde Frost; Meyer, Rikke Louise; Schlafer, Sebastian

    performed in technical and biological duplicates. Bifidobacterium dentium, Rothia dentocariosa and Streptococcus mutans did not adhere to the flow cell, irrespective of the presence of osteopontin. Osteopontin reduced the adhesion of Actinomyces naeslundii, Actinomyces viscosus, Lactobacillus paracasei...... subsp. paracasei, Streptococcus mitis and Streptococcus oralis with 74.0%, 62.4%, 90.0%, 89.6% and 81.5%, respectively, compared to protein-free saliva. All reductions were statistically significant (p<0.05) and significantly stronger than the reductions observed for caseinoglycomacropeptide (p<0.......05). ), as determined by two-sample t-tests. The broad range anti-adhesive effect of osteopontin on dental bacterial strains might explain the reduced biofilm formation observed and be exploited in vivo for increased caries control....

  8. Antimicrobial activity of diterpenes from Viguiera arenaria against endodontic bacteria.

    Carvalho, Tatiane C; Simão, Marília R; Ambrósio, Sérgio R; Furtado, Niege A J C; Veneziani, Rodrigo C S; Heleno, Vladimir C G; Da Costa, Fernando B; Gomes, Brenda P F A; Souza, Maria Gorete M; Borges dos Reis, Erika; Martins, Carlos H G

    2011-01-01

    Six pimarane-type diterpenes isolated from Viguiera arenaria Baker and two semi-synthetic derivatives were evaluated in vitro against a panel of representative microorganisms responsible for dental root canal infections. The microdilution method was used for the determination of the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against Porphyromonas gingivalis, Prevotella nigrescens, Prevotella intermedia, Prevotella buccae, Fusobacterium nucleatum, Bacteroides fragilis, Actinomyces naeslundii, Actinomyces viscosus, Peptostreptococcus micros, Enterococcus faecalis and Aggregatibacter actinomycetemcomitans. The compounds ent-pimara-8(14),15-dien-19-oic acid, its sodium salt and ent-8(14),15-pimaradien-3β-ol were the most active, displaying MIC values ranging from 1 to 10 μg mL-1. The results also allow us to conclude that minor structural differences among these diterpenes significantly influence their antimicrobial activity, bringing new perspectives to the discovery of new chemicals for use as a complement to instrumental endodontic procedures. PMID:21233793

  9. Pulmonary actinomycosis in fine needle aspiration cytology

    Patel Keyuri

    2009-01-01

    Full Text Available Pulmonary actinomycosis is a rare bacterial lung disease caused by one of two types of bacteria, Actinomyces or Propioni. Pulmonary actinomycosis in the lung causes lung cavities, lung nodules, and pleural effusion. We report here a case of pulmonary actinomycosis that was diagnosed by fine needle aspiration cytology (FNAC. A 45 year-old male with a history of smoking and alcohol abuse, presented with complaints of cough with hemoptysis, right-sided chest pain, and fever of two months′ duration. A chest radiograph and computed tomography (CT of the thorax showed a right upper lobe mass lesion with hilar lymphadenopathy. CT-guided FNAC revealed colonies of Actinomyces surrounded by polymorphs. The disease is commonly confused with other chronic suppurative lung diseases and malignancy. An early diagnosis by FNAC prevents difficulties in the management of the disease, as well as considerable physiological and physical morbidity, including unwarranted surgery.

  10. Probing of microbial biofilm communities for coadhesion partners.

    Ruhl, Stefan; Eidt, Andreas; Melzl, Holger; Reischl, Udo; Cisar, John O

    2014-11-01

    Investigations of interbacterial adhesion in dental plaque development are currently limited by the lack of a convenient assay to screen the multitude of species present in oral biofilms. To overcome this limitation, we developed a solid-phase fluorescence-based screening method to detect and identify coadhesive partner organisms in mixed-species biofilms. The applicability of this method was demonstrated using coaggregating strains of type 2 fimbrial adhesin-bearing actinomyces and receptor polysaccharide (RPS)-bearing streptococci. Specific adhesin/receptor-mediated coadhesion was detected by overlaying bacterial strains immobilized to a nitrocellulose membrane with a suspended, fluorescein-labeled bacterial partner strain. Coadhesion was comparable regardless of which cell type was labeled and which was immobilized. Formaldehyde treatment of bacteria, either in suspension or immobilized on nitrocellulose, abolished actinomyces type 2 fimbrial adhesin but not streptococcal RPS function, thereby providing a simple method for assigning complementary adhesins and glycan receptors to members of a coadhering pair. The method's broader applicability was shown by overlaying colony lifts of dental plaque biofilm cultures with fluorescein-labeled strains of type 2 fimbriated Actinomyces naeslundii or RPS-bearing Streptococcus oralis. Prominent coadhesion partners included not only streptococci and actinomyces, as expected, but also other bacteria not identified in previous coaggregation studies, such as adhesin- or receptor-bearing strains of Neisseria pharyngitis, Rothia dentocariosa, and Kingella oralis. The ability to comprehensively screen complex microbial communities for coadhesion partners of specific microorganisms opens a new approach in studies of dental plaque and other mixed-species biofilms. PMID:25107971

  11. In vitro Adhesion and Ribotypes Among Oral Bacteria Isolated From Plaque on Titanium, Hydroxyapatite and Amalgam Surfaces

    Leonhardt, Å.; J. Olsson; Dahlén, G

    2011-01-01

    The aim of this study was to examine initial bacterial adherence to saliva coated titanium, hydroxyapatite, and amalgam surfaces and to determine whether different bacterial geno-or phenotypic variants were attracted to these surfaces. From six individuals, each with three different test surfaces, 18 strains each of Actinomyces naeslundii, Streptococcus sanguis, S. oralis and S. mitis were investigated by rRNA gene restriction analysis (ribotyping), to disclose potential genotypic similaritie...

  12. Mutualism versus Independence: Strategies of Mixed-Species Oral Biofilms In Vitro Using Saliva as the Sole Nutrient Source

    Palmer, Robert J.; Kazmerzak, Karen; Hansen, Martin C.; Kolenbrander, Paul E.

    2001-01-01

    During initial dental plaque formation, the ability of a species to grow when others cannot would be advantageous, and enhanced growth through interspecies and intergeneric cooperation could be critical. These characteristics were investigated in three coaggregating early colonizers of the tooth surface (Streptococcus gordonii DL1, Streptococcus oralis 34, and Actinomyces naeslundii T14V). Area coverage and cell cluster size measurements showed that attachment of A. naeslundii and of S. gordo...

  13. Effects of Streptococcus mutans gtfC deficiency on mixed oral biofilms in vitro

    Thurnheer, T; van der Ploeg, J R; Giertsen, E; Guggenheim, B

    2006-01-01

    The aim of this study was to examine the influence of glucosyltransferase-gene-negative (gtf-) Streptococcus mutans strains unable to synthesize water-insoluble or soluble glucan on the structure and macromolecular diffusion properties of in vitro grown mixed oral biofilms. Biofilms modeling supragingival plaque consisted of Actinomyces naeslundii OMZ 745, Candida albicans OMZ 110, Fusobacterium nucleatum KP-F2, Streptococcus oralis SK 248, Veillonella dispar ATCC 17748T and one of the S. mut...

  14. Actinomycosis of The Tongue: A Diagnostic Dilemma

    Aniece Chowdary, Anirudh Kaul, Surinder Atri*

    2010-10-01

    Full Text Available Actinomycosis is a bacterial, suppurative chronic infectious disease caused by Actinomyces israelli.Actinomycotic infections of the cervicofacial region are not uncommon , however Actinomycosis of tongueis rare. A mass that may mimic both benign and malignant neoplasms can be seen at clinical presentationand may mislead the diagnosis. We report a patient who presented with a tumor like tongue mass causingspeech disturbance and difficulty in swallowing, diagnosed as actinomycosis

  15. Efficacy of natural antimicrobials in toothpaste formulations against oral biofilms in vitro

    Verkaik, M.J.; Busscher, H. J.; Jager, D; Slomp, A.M.; Abbas, F.; Mei, H.C. van der

    2011-01-01

    Objectives: To evaluate the antimicrobial efficacies of two toothpaste formulations containing natural antimicrobials (herbal extracts and chitosan) against oral biofilms of different composition and maturational status. Methods: Bacteria from a buffer suspension or fresh saliva were adhered for 2 h to a salivary conditioning film and subsequently grown for 16 h. Dual-species biofilms were prepared from Actinomyces naeslundii T14V-J1 and Streptococcus oralis J22, whilst multi-species biofilms...

  16. Ostearticular Retroperitoneal Actinomycosis. A Case Study

    Actinomycosis is a chronic granulomatous bacterial infection which tends to result in the formation of abscesses and cutaneous fistulas. Its most common pathogenic agent is Actinomyces israeli, which is a common commensal of the human mouth and gastrointestinal tract. Retroperitoneal actinomycosis is rare, and even more so is its affecting bones and joints. Presented here is a case of osteoarticular retroperitoneal actinomycosis. Pertinent literature is also reviewed. (Author) 28 refs

  17. GenBank blastx search result: AK104368 [KOME

    Full Text Available AK104368 001-035-E04 AF056321.1 Actinomyces naeslundii urea se gamma subunit UreA ... (ureA ), urea se ... beta subunit UreB (ureB), urea se alpha subunit UreC (ureC), urea se accessory prot ... ein UreE (ureE), urea se accessory protein UreF (ureF), urea se accessory ...

  18. A Comparative Analysis of the Sugar Phosphate Cyclase Superfamily Involved in Primary and Secondary Metabolism

    Wu, Xiumei; Flatt, Patricia M.; Schlörke, Oliver; Zeeck, Axel; Dairi, Tohru; Mahmud, Taifo

    2007-01-01

    Sugar Phosphate Cyclases (SPCs) catalyze the cyclization of sugar phosphates to produce a variety of cyclitol intermediates that serve as the building blocks of many primary metabolites, e.g., aromatic amino acids, and clinically relevant secondary metabolites, e.g., aminocyclitol/aminoglycoside and ansamycin antibiotics. Feeding experiments with isotopically-labeled cyclitols revealed that cetoniacytone A, a unique C7N-aminocyclitol antibiotic isolated from an insect endophytic Actinomyces s...

  19. Human intestinal epithelial cells in innate immunity : interactions with normal microbiota and pathogenic bacteria

    Ou, Gangwei

    2009-01-01

    Rod-shaped bacteria were previously shown to be associated with the small intestinal epithelium of children with celiac disease (CD). Using culture-dependent and independent methods, we characterized the microbiota of small intestine in children with CD and controls. The normal microbiota constitutes an unique organ-specific biofilm. Dominant bacteria are Streptococcus, Neisseria, Veillonella, Gemella, Actinomyces, Rothia and Haemophilus. Altogether 162 Genus Level Operational Taxonomic Units...

  20. Selected dietary (poly)phenols inhibit periodontal pathogen growth and biofilm formation

    Combet, Emilie; Shahzad, Muhammad; Millhouse, Emma; Culshaw, Shauna; Edwards, Christine A; Ramage, Gordon

    2015-01-01

    Periodontitis (PD) is a chronic infectious disease mediated by bacteria in the oral cavity. (Poly)phenols (PPs), ubiquitous in plant foods, possess antimicrobial activities and may be useful in the prevention and management of periodontitis. The objective of this study was to test the antibacterial effects of selected PPs on periodontal pathogens, on both planktonic and biofilm modes of growth. Selected PPs (n=48) were screened against Streptococcus mitis (S. mitis), Aggregatibacter actinomyc...

  1. In vitro antimicrobial efficiency of a mouthwash containing triclosan/gantrez and sodium bicarbonate Eficiência antimicrobiana in vitro de um enxaguatório bucal contendo triclosan/gantrez e bicarbonato de sódio

    Juliana Rico Pires; Carlos Rossa Junior; Antonio Carlos Pizzolitto

    2007-01-01

    Several antiseptic substances have been used as adjuncts to routine mechanical procedures of oral hygiene, based on their antimicrobial effects. The objective of this study was to assess in vitro the antimicrobial efficiency of a mouthwash containing Triclosan/Gantrez and sodium bicarbonate in comparison to both positive and negative controls. Standard strain samples of Escherichia coli, Pseudomonas aeruginosa, Actinomyces viscosus and Bacillus subtilis were used. Samples of Streptococcus mut...

  2. Pediatric cervicofacial actinomycosis disclosing an underlying congenital dermoid cyst

    Santwana Verma; Ghanshyam Kumar Verma; Vinay Shanker; Anil Kanga; Gagandeep Singh; Neelam Gupta; Geeta Ram Tegta; Jatin Sharma; Aarti Garg

    2014-01-01

    Pediatric cervicofacial actinomycosis is a rare occurrence consequent to dental infections and manipulations or maxillofacial trauma. The clinical presentation ranges from multiple draining sinuses to swellings resembling tumors and cysts. The present unusual case had congenital dermoid cyst of mid upper lip with Actinomyces israelii infection identified on microscopy, culture, and histopathology. A successful outcome in the present case was obtained using combination of medical and surgical ...

  3. Effects of Biocontrol Strain E26 on Some Ecological Factors

    WANG Hui-min; SUN Yan-li; WANG Jian-hui

    2002-01-01

    This study was to evaluate the ecological risk of strain E26 (Agrobacterium sp. ) by detecting its survival in waters and its effects on rhizosphere microorganisms. The data showed that E26 could not be detected in distilled water, tap water, river water, and rainwater after 36, 36, 8, and 9 days, respectively. E26 did not reveal significant effects on the population of bacteria, fungi, and actinomyces in rhizosphere soil and on the root surface of grapevines.

  4. Antibacterial activity of Tribulus terrestris and its synergistic effect with Capsella bursa-pastoris and Glycyrrhiza glabra against oral pathogens: an in-vitro study

    Saman Soleimanpour; Fereshteh Sadat Sedighinia; Akbar Safipour Afshar; Reza Zarif; Kiarash Ghazvini

    2015-01-01

    Objective: In this study, antimicrobial activities of an ethanol extract of Tribulus terrestris aloneand in combination with Capsella bursa-pastoris and Glycyrrhiza glabra were examined in vitro against six pathogens namely Streptococcus mutans, Streptococcus sanguis, Actinomyces viscosus, Enterococcus faecalis Staphylococcus aureus, and Escherichia coli. Materials and methods: Antibacterial activities of the extracts were examined using disc and well diffusion methods and the minimum inhibit...

  5. Successful outpatient management of pelvic actinomycosis by ceftriaxone: a report of three cases

    Eda Demir Onal

    2009-10-01

    Full Text Available Pelvic actinomycosis is a chronic granulomatous suppurative disease caused by actinomyces israeli. Intravenous penicillin is the preferred antimicrobial but it requires hospitalization up to one month. An outpatient treatment strategy would be cost effective and a good choice for patients. Here we present three cases in which intramuscular ceftriaxone was successfully used in the outpatient settings following surgery and IV penicillin treatment in the hospital.

  6. Characterization of salivary alpha-amylase binding to Streptococcus sanguis.

    Scannapieco, F.A.; Bergey, E J; Reddy, M. S.; LeVine, M. J.

    1989-01-01

    The purpose of this study was to identify the major salivary components which interact with oral bacteria and to determine the mechanism(s) responsible for their binding to the bacterial surface. Strains of Streptococcus sanguis, Streptococcus mitis, Streptococcus mutans, and Actinomyces viscosus were incubated for 2 h in freshly collected human submandibular-sublingual saliva (HSMSL) or parotid saliva (HPS), and bound salivary components were eluted with 2% sodium dodecyl sulfate. By sodium ...

  7. Red wine and oenological extracts display antimicrobial effects in an oral bacteria biofilm model

    Muñoz-González, Irene; Thurnheer, Thomas; Bartolomé, Begoña; Moreno-Arribas, M. Victoria

    2014-01-01

    The antimicrobial effects of red wine and its inherent components on oral microbiota were studied by using a 5-species biofilm model of the supragingival plaque that includes Actinomyces oris, Fusobacterium nucleatum, Streptococcus oralis, Streptococcus mutans and Veillonella dispar. Microbiological analysis (CFU counting and confocal laser scanning microscopy) of the biofilms after the application of red wine, dealcoholized red wine, and red wine extract solutions spiked or not with grape se...

  8. Bacteriological Study of the Fishmeal used in Feed for Imported Chicken in Atlantic Department

    Dougnon Jacques Tossou

    2012-02-01

    Full Text Available Bacteria are microorganisms involved in the digestion of foods by many animals. At the same time, some of them are pathogens causing serious diseases to the survival of animals that harbor them. It is therefore essential to identify the different species of bacteria in feed served to farm animals. The present study aims at identifying the bacteria in the fishmeal used for feeding imported chickens in Atlantic Department. Out of sixtyone (61 samples collected, twenty six (26 came from provender sites, sixteen (16 from wholesaling importers and nineteen (19 from imported chicken breeds. A total of twelve types of bacteria were identified: Staphylococcus, Klebsiella, Serratia spp, Actinomyces piogenes, Erysipelothrix spp, Citrobacter spp, Escherichia coli, Lysteria spp, Levinea spp, Salmonella spp, Bacillus spp, Providencia spp. Ten out of them, namely Staphylococcus spp, Klebsiella spp, Serratia spp, Actinomyces piogenes; Erysipelothrix spp, Escherichia coli, Levinea spp, Bacillus spp, Lysteria spp, Providencia spp were isolated from provender and five (5 bacteria: Staphylococcus spp, Klebsiella spp, Actinomyces piogenes; Lysteria spp; Levinea spp were found in fishmeal from wholesalers. Regarding the poultry farms, seven (7 bacteria out of twelve, Staphylococcus spp, Actinomyces piogenes, Citrobacter spp, Escherichia coli, Klebsiella spp, Levinea spp and Providencia spp were isolated from fishmeal. As for the two varieties of fishmeal used, it is clear that Klebsiella spp was more present in the Extra variety at a rate of 27.27%. On the other hand, the Valcru variety was contaminated with Staphylococcus spp at a rate of 18.18%. Therefore, it is essential to take into consideration hygienic measures.

  9. Pulmonary actinomycosis in fine needle aspiration cytology

    Patel Keyuri; Gupta Gurudutt; Shah Menka; Patel Purvesh

    2009-01-01

    Pulmonary actinomycosis is a rare bacterial lung disease caused by one of two types of bacteria, Actinomyces or Propioni. Pulmonary actinomycosis in the lung causes lung cavities, lung nodules, and pleural effusion. We report here a case of pulmonary actinomycosis that was diagnosed by fine needle aspiration cytology (FNAC). A 45 year-old male with a history of smoking and alcohol abuse, presented with complaints of cough with hemoptysis, right-sided chest pain, and fever of two months′...

  10. Selective Antibacterial Properties of Lysozyme for Oral Microorganisms

    Iacono, Vincent J.; MacKay, Bruce J.; DiRienzo, Sharon; Pollock, Jerry J.

    1980-01-01

    The antibacterial properties of lysozyme were investigated with oral microorganisms representing the seven serotypes (a through g) of Streptococcus mutans, Veillonella alcalescens, and the virulent (V) and avirulent (AV) strains of Actinomyces viscosus T14. Growth of bacteria in defined medium was monitored spectrophotometrically after the addition of various amounts (25 μg to 5 mg/ml) of enzyme. No growth inhibition of V. alcalescens was observed. Inhibition of A. viscosus T14(V) and A. visc...

  11. Abdominopelvic actinomycosis mimicking disseminated peritoneal carcinomatosis

    Hildyard, Catherine A T; Gallacher, Neil J; Macklin, Philip S

    2013-01-01

    We present a case of a 38-year-old woman who presented with symptoms suggestive of intra-abdominal or pelvic malignancy: marked weight loss, abdominal pain, altered bowel habit, anorexia and fatigue. The findings of multiple peritoneal deposits, adnexal and presacral masses on CT imaging and appearances on diagnostic laparotomy also suggested malignancy. However, the histological analysis was inconsistent with malignancy and revealed an infection with Actinomyces israelii. The patient started...

  12. Pulmonary Actinomycosis with Endobronchial Involvement: A Case Report and Literature Review

    Farrokh, Donya; Rezaitalab, Fariba; Bakhshoudeh, Banafsheh

    2014-01-01

    Pulmonary actinomycosis is a rare chronic pulmonary infection caused by actinomyces, a Gram–positive, microaerophilic bacterium. Pulmonary involvement other than cervicofacial or abdominopelvic actinomycosis is uncommon and often leads to a misdiagnosis of pulmonary tuberculosis or lung cancer. Endobronchial involvement is very rare in pulmonary actinomycosis. Here in, we describe the case of a 66–year–old male patient, referred with a history of massive hemoptysis since a few weeks ago. Plai...

  13. Effect of Human Saliva on Glucose Uptake by Streptococcus mutans and Other Oral Microorganisms

    Germaine, Greg R.; Tellefson, Lois M.

    1981-01-01

    We examined the effects of human whole salivary supernatant and parotid fluid on glucose uptake by Streptococcus mutans, Streptococcus sanguis, Streptococcus mitis, Actinomyces viscosus, Staphylococcus aureus, and Escherichia coli. The following three effects of saliva were observed: (i) inhibition of glucose uptake (S. mutans, S. sanguis), (ii) promotion of a transient, rapid (0 to 30 s) burst of glucose uptake (S. mutans, S. sanguis), and (iii) enhancement of glucose uptake (S. mitis, A. vi...

  14. Complete structure of the cell surface polysaccharide of Streptococcus oralis ATCC 10557: A receptor for lectin-mediated interbacterial adherence

    Abeygunawardana, C.; Bush, C.A. (Univ. of Maryland, Baltimore (United States)); Cisar, J.O. (National Inst. of Dental Research, Bethesda, MD (United States))

    1991-07-02

    Lectin-carbohydrate binding is known to play an important role in a number of different cell-cell interactions including those between certain species of oral streptococci and actinomyces that colonize teeth. The cell wall polysaccharides of Streptococcus oralis ATCC 10557, S. oralis 34, and Streptococcus mitis J22, although not identical antigenically, each function as a receptor molecule for the galactose and N-acetylgalactosamine reactive fimbrial lectins of Actinomyces viscosus and Actinomyces naeslundii. Carbohydrate analysis of the receptor polysaccharide isolated from S. oralis ATCC 10557 shows galactose (3 mol), glucose (1 mol), GalNAc (1 mol), and rhamnose (1 mol). {sup 1}H NMR spectra of the polysaccharide show that is partially O-acetylated. Analysis of the {sup 1}H NMR spectrum of the de-O-acetylated polysaccharide shows that it is composed of repeating subunits containing six monosaccharides and that the subunits are joined by a phosphodiester linkage. The {sup 1}H and {sup 13}C NMR spectra were completely assigned by two-dimensional homonuclear correlation methods and by {sup 1}H-detected heteronuclear multiple-quantum correlation ({sup 1}H({sup 13}C)HMQC). The complete {sup 1}H and {sup 13}C assignment of the native polysaccharide was carried out by the same techniques augmented by a {sup 13}C-coupled hybrid HMQC-COSY method, which is shown to be especially useful for carbohydrates in which strong coupling and overlapping peaks in the {sup 1}H spectrum pose difficulties.

  15. Complete structure of the cell surface polysaccharide of Streptococcus oralis C104: A 600-MHz NMR study

    Abeygunawardana, C.; Bush, C.A. (Univ. of Maryland, Baltimore (United States)); Cisar, J.O. (National Inst. of Dental Research, Bethesda, MD (United States))

    1991-09-03

    Specific lectin-carbohydrate interactions between certain oral streptococci and actinomyces contribute to the microbial colonization of teeth. The receptor molecules of Streptococcus oralis, 34, ATCC 10557, and Streptococcus mitis J22 for the galactose and N-acetylgalactosamine reactive fimbrial lectins of Actinomyces viscosus and Actinomyces naeslundii are antigenically distinct polysaccharides, each formed by a different phosphodiester-linked oligosaccharide repeating unit. Receptor polysaccharide was isolated form S. oralis C104 cells and was shown to contain galactose, N-acetylgalactosamine, ribitol, and phosphate with molar ratios of 4:1:1:1. The {sup 1}H NMR spectrum of the polysaccharide shows that it contains a repeating structure. The individual sugars in the repeating unit were identified by {sup 1}H coupling constants observed in E-COSY and DQF-COSY spectra. NMR methods included complete resonance assignments ({sup 1}H and {sup 13}C) by various homonuclear and heteronuclear correlation experiments that utilize scalar couplings. Sequence and linkage assignments were obtained from the heteronuclear multiple-bond correlation (HMBC) spectrum. This analysis shows that the receptor polysaccharide of S. oralis C104 is a ribitol teichoic acid polymer composed of a linear hexasaccharide repeating unit containing two residues each of galactopyranose and galactofuranose and a residue each of GalNAc and ribitol joined end to end by phosphodiester linkages.

  16. Carotid artery rupture and cervicofacial actinomycosis.

    Kummer, Anne; Lhermitte, Benoît; Ödman, Micaela; Grabherr, Silke; Mangin, Patrice; Palmiere, Cristian

    2012-11-01

    Cervicofacial actinomycosis is an uncommon, progressive infection caused by bacilli of the Actinomyces genus. Actinomyces are common commensal saprophytes in the oral cavity which may have medical importance as facultative pathogens. Subsequent to local injuries to the oral mucosa, they may penetrate the deep tissues and be responsible for suppurative or granulomatous infections. We herein report a case of a 65-year-old man who underwent surgery followed by chemotherapy and radiotherapy for a tonsillar carcinoma. An ulcerous lesion in the base of the tongue developed and spread to the carotid artery wall. The man died of a massive hemorrhage due to left carotid artery rupture. Postmortem computed tomography angiography performed prior to autopsy allowed the precise localization of the source of bleeding to be detected. Postmortem biochemical investigations confirmed the presence of inflammation associated with local bacterial infection. Histological investigations revealed the rupture of the left carotid artery surrounded by numerous colonies of Actinomyces. Acute and chronic inflammation with tissue necrosis as well as post-actinic, fibrotic changes were also found in the tissues surrounding the ruptured artery wall. PMID:22819527

  17. Temporal-spatial dynamics of distribution patterns of microorganism relating to biological soil crusts in the Gurbantunggut Desert

    WU Nan; WANG Hongling; LIANG Shaoming; NIE Huali; ZHANG Yuanming

    2006-01-01

    Biological soil crusts serve as an important biological factor contributing to the sand fixation. This study was conducted to investigate the temporal-spatial variability of microorganism in crusts relating to locations, soil layers of sand dunes and seasons. At moss-dominated inter-dune areas,higher soil nutrient and water concentrations were likely to maintain the microbial activities. Bacteria showed the highest capabilities of settlement and growth in inter-dunes in both spring and autumn. Soil water content reached the highest value in soil crusts in the inter-dune areas, especially in spring. Variations of quantities of actinomyces and fungi basically showed the consistent trend in different locations of sand dunes. With the deepening of soil layers, vertical distribution of quantities of each microorganism group showed different characteristics because environmental factors fluctuated in both spring and autumn. Among different microorganism groups, bacteria were predominant, actinomyces the next and fungi the least in both spring and autumn in all soil layers (0-20 cm). The proportion of bacteria and soil water content were higher in spring than those in autumn in all soil layers (0-20 cm). No consistent trends were found in actinomyces and fungi. The results showed that the quantities of microorganisms were significantly positive correlated with organic matter content,soil water content, total N, total P, available P, available K, pH, electrical conductivity, total salt content,catalase, urease, phosphatase and alkaline phosphatase.

  18. Complete structure of the cell surface polysaccharide of Streptococcus oralis ATCC 10557: A receptor for lectin-mediated interbacterial adherence

    Lectin-carbohydrate binding is known to play an important role in a number of different cell-cell interactions including those between certain species of oral streptococci and actinomyces that colonize teeth. The cell wall polysaccharides of Streptococcus oralis ATCC 10557, S. oralis 34, and Streptococcus mitis J22, although not identical antigenically, each function as a receptor molecule for the galactose and N-acetylgalactosamine reactive fimbrial lectins of Actinomyces viscosus and Actinomyces naeslundii. Carbohydrate analysis of the receptor polysaccharide isolated from S. oralis ATCC 10557 shows galactose (3 mol), glucose (1 mol), GalNAc (1 mol), and rhamnose (1 mol). 1H NMR spectra of the polysaccharide show that is partially O-acetylated. Analysis of the 1H NMR spectrum of the de-O-acetylated polysaccharide shows that it is composed of repeating subunits containing six monosaccharides and that the subunits are joined by a phosphodiester linkage. The 1H and 13C NMR spectra were completely assigned by two-dimensional homonuclear correlation methods and by 1H-detected heteronuclear multiple-quantum correlation (1H[13C]HMQC). The complete 1H and 13C assignment of the native polysaccharide was carried out by the same techniques augmented by a 13C-coupled hybrid HMQC-COSY method, which is shown to be especially useful for carbohydrates in which strong coupling and overlapping peaks in the 1H spectrum pose difficulties

  19. Relationship between potassium chloride suppression of corn stalk rot and soil microorganism characteristics

    LIU Xiaoyan; JIN Jiyun; HE Ping; LIU Hailong; LI Wenjuan

    2007-01-01

    Observations from a site-fixed field trial of 12 years in Jilin Province show that potassium chloride (KC1)application has a significant positive influence on corn stalk rot incidence.Incubation experiments were conducted to study the effects of KC1 and soil extracts on the growth of Fusarium graminearum,the most common stalk rot fungi in this area,and the population changes in rhizosphere fungi,bacteria and actinomyces at different growth stages of corn.The results show that KC1 addition to the potato dextrose agar (PDA) medium could not directly suppress Fusarium graminearum development.Soil extracts from soil samples taken from the field plots with and without KC1 application affected Fusarium graminearum development,with soil extracts with KC1 treatments suppressing Fusarium graminearum development more significantly,compared with that from the KC1-free treatment.These results indicate that soil extracts play a role in the interaction between corn and Fusarium graminearum.Long-term KC1 application may increase the populations of rhizosphere fungi and actinomyces in the early growth stages,while there is no significant difference in the number of bacteria in rhizosphere among the treatments.Also,the populations of rhizosphere fungi are negatively correlated with the incidence of stalk rot in the early growth stages of corn.The sensitive infection stages of pathogen to corn consist of the stages when there is significant difference in the populations of rhizosphere fungi and actinomyces.The change of microorganism populations (especially fungi) in soil may be associated with the incidence decrease and is one of the mechanisms of KC1 suppressing corn stalk rot.

  20. Effect of Pesticides on soil microbial and enzyme activity

    WANG Lan; LI Xiao-hui

    2008-01-01

    Objective Pesticides has gain an increasing awareness because of it is becoming a serious environmental problem and come to threaten the health of humanbeing. The effect of five pesticides (zineb, copforce, the mixture of earbendazim and mancozeb, hymexazol) on soil bacteria, fungi, actinomyces, and Five specific enzymes were chosen for investigation (urease, dehydrogenase, invertase, acid phosphates and protease). Methods The enumeration of the soil micro flora was done by the dilution plate method; The enzyme activity was determined by traditional methods. Shannon-Wiener index as well as 16S rRNA-PCR amplification and DGGE fingerprinting was used for detection of shift in microbial community diversity in pesticides contaminated agricultural soil. Results The outcome showed that the microbial diversity was significantly changed after the application of pesticides, the effect of pesticides on microbe had a order from top to bottom:bacteria-actinomyces-fungi. Conclusions Our results indicate that the use of the pesticides hymexazol resulted in an altered soil community structure, in particular for the actinomyces. Invertase was markedly inhibited by hymexazol, zineb, carbendazim and mancozeb and the inhibiting rates were varied between 30.30 % and 21.21%;Urease activity was also inhibited significantly by hymexazol, the inhibiting rate was 37.67%;Protease activity was markedly inhibited by zineb and hymexazol, the inhibiting rates were 27.27 % and 18.18 % respectively; Phosphates activity was inhibited significantly by hymexazol, zineb, earbendazim and mancozeb, the inhibiting rates were range from 22.12 %-3.54 %; Dehydrogenase activity was not significantly affected by pesticides. Meanwhile, the correlation of all indexes were analyzed, the data suggested that all indexes existed certain correlation.

  1. Actinomicosis: presentación de un caso y revisión del tema con énfasis en los aspectos orales Actinomycosis in children with emphasis on oral aspects

    Luis Fernando Gómez Jiménez

    1997-04-01

    Full Text Available En el presente artículo se actualizan los conocimientos sobre actinomicosis y se presenta el caso de un niño con la forma torácica de dicha entidad. La actinomicosis es una infección infrecuente que puede afectar cualquier parte del cuerpo; los Actinomyces son bacilos o filamentos gram positivos que forman parte de la flora endógena de las mucosas en especial las de las cavidades oral e intestinal. Su comportamiento es insidioso pero en oportunidades tiene expresión aguda, fistulización a piel y cicatrización con fibrosis. Los llamados gránulos de azufre son una característica macroscópica del exudado que contribuye al diagnóstico de laboratorio. La infección inicial para la forma cervicofacial suele provenir de la cavidad oral y extenderse a la vecindad o ser aspirada a los pulmones. El tratamiento de elección es la penicilina, inicialmente endovenosa y seguidamente oral por un lapso no menor de 6 meses. Algunas formas requieren manejo quirúrgico. We report the case of a child with thoracic actinomycosis and review this disease. Actinomycosis is a rare infection that can affect any part of the body; Actinomyces are gram positive bacilli or filaments belonging to the endogenous flora of the mUCOUS membranes, specially that of the oral cavity and the intestinal tract. Actinomycosis usually behaves as an insidioUS disease but may ocassionally have acute expressions with fistulization to the skin and fibroUS healing during resolution. The So called sulfur granules are an important macroscopic detail that helps establish the diagnosis. Actinomyces infections usually start in the oral cavity for the cervicofacial form and then spread to contiguous tissues or to the lungs via aspiration. Penicillin is the drug of choice and surgical drainage may become necessary.

  2. Pulp and plaque microbiotas of children with severe early childhood caries

    Natalia I. Chalmers

    2015-02-01

    Full Text Available Background and objective: Bacterial invasion into pulps of primary teeth can lead to infection and premature tooth loss in children. This pilot study aimed to explore whether the microbiota of carious exposures of dental pulps resembles that of carious dentin or that of infected root canals. Design: Children with severe early childhood caries were studied. Children were consented and extent of caries, plaque, and gingivitis measured. Bacteria were sampled from carious lesion biofilms and vital carious exposures of pulps, and processed by anaerobic culture. Isolates were characterized from partial sequences of the 16S rRNA gene and identified by comparison with taxa in the Human Oral Microbiome Database (http://www.HOMD.org. The microbiotas of carious lesions and dental pulps were compared using univariate and multivariate approaches. Results: The microbiota of cariously exposed pulps was similar in composition to that of carious lesion biofilms except that fewer species/taxa were identified from pulps. The major taxa identified belonged to the phyla Firmicutes (mainly streptococci and Actinobacteria (mainly Actinomyces species. Actinomyces and Selenomonas species were associated with carious lesions whereas Veillonella species, particularly Veillonella dispar was associated with pulps. Other bacteria detected in pulps included Streptococcus mutans, Parascardovia denticolens, Bifidobacterium longum, and several Lactobacillus and Actinomyces species. By principal, component analysis pulp microbiotas grouped together, whereas those in caries biofilms were widely dispersed. Conclusions: We conclude that the microbiota of cariously exposed vital primary pulps is composed of a subset of species associated with carious lesions. Vital primary pulps had a dominant Firmicutes and Actinobacteria microbiota which contrasts with reports of endodontic infections which can harbor a gram-negative microbiota. The microbiota of exposed primary pulps may provide

  3. Multiplex fluorescence in situ hybridization (M-FISH) and confocal laser scanning microscopy (CLSM) to analyze multispecies oral biofilms.

    Karygianni, Lamprini; Hellwig, Elmar; Al-Ahmad, Ali

    2014-01-01

    Multiplex fluorescence in situ hybridization (M-FISH) constitutes a favorable microbiological method for the analysis of spatial distribution of highly variable phenotypes found in multispecies oral biofilms. The combined use of confocal laser scanning microscopy (CLSM) produces high-resolution three-dimensional (3D) images of individual bacteria in their natural environment. Here, we describe the application of M-FISH on early (Streptococcus spp., Actinomyces naeslundii) and late colonizers (Fusobacterium nucleatum, Veillonella spp.) of in situ-formed oral biofilms, the acquisition of CLSM images, as well as the qualitative and quantitative analysis of these digitally obtained and processed images. PMID:24664826

  4. Untersuchungen zur initialen Biofilmbildung von koaggregierenden oralen Keimen an zahnärztlichen Werkstoffen in vitro

    Wislsperger, Birgit Verena

    2012-01-01

    Das häufige Versagen zahnärztlicher Restaurationen aufgrund von Sekundärkaries und Parodontitis wirft die Frage auf, ob bestimmte Werkstoffe von oralen Keimen bevorzugt kolonisiert werden, welche Materialeigenschaften hierfür verantwortlich sein könnten und welche weiteren Faktoren die Biofilmbildung auf zahnärztlichen Restaurationen beeinflussen. In der vorliegenden Arbeit wurde deshalb die Adhäsion der oralen Keime Streptococcus gordonii DL1 und Actinomyces naeslundii T14V an verschiedene p...

  5. Cell surface polypeptide CshA mediates binding of Streptococcus gordonii to other oral bacteria and to immobilized fibronectin.

    McNab, R; Holmes, A.R.; Clarke, J M; Tannock, G W; Jenkinson, H F

    1996-01-01

    Isogenic mutants of Streptococcus gordonii DL1 (Challis) in which the genes encoding high-molecular-mass cell surface polypeptides CshA and/or CshB were inactivated were deficient in binding to four strains of Actinomyces naeslundii and two strains of Streptococcus oralis. Lactose-sensitive interactions of S. gordonii with A. naeslundii ATCC 12104 and PK606 were associated with expression of cshA but not of cshB. Lactose-insensitive interactions of S. gordonii with A. naeslundii T14V and WVU6...

  6. THE ANTIMICROBIAL EFFECT OF GARLIC (ALLIUM SATIVUM EXTRACT ON MOUTH MICROFLORA

    S.Mehrabian

    1995-12-01

    Full Text Available Five strains of mouth normal microflora containing staphylococcus epidermidis, streptococcus mutant, lactobacillus acidophilus, Actinomyces viscosos and candida albicans, were isolated and identified then cultured and purified on different media by using routine methods in microbiology. Extract of 3 garlic samples south (Khuzestan, north (Mazanderan and Hamedan garlics, were affected on these microbial cultures using Bauer and Kirby method. The effects were compared with antimicrobial effects of erythromycin. The results show all three used extracts have antimicrobial effects. The extract had a bactericidal effect on bacteria but a fungi static on candida albicans.

  7. Alleviating Effect of Phenol Compounds on Cucumber Fusarium Wilt and Mechanism

    YUAN Fei; ZHANG Chun-lan; SHEN Qi-rong

    2003-01-01

    The amount of phenol compounds in the soil increased after adding organic material into the soil. It was found that p-hydroxybenzoic acid, p-coumaric acid and frulic acid alleviated Fusarium wilt of cucumber, the alleviating effect of p-hydroxybenzoic acid was the best, followed by p-coumaric acid and frulic acid. The total amount of bacterial, actinomyces and fungus in high phenol compounds treatment decreased than that of control treatment, while the microorganisms' amount in low phenol compounds treatment increased. Phenol compounds inhibit the growth of pathogen.

  8. Abscesos en Conejos

    Claudia Brieva

    2008-09-01

    Full Text Available Los abscesos son anomalías comunes en los conejos. Consisten en un acumulo de pus en el subcutis, rodeado por una cápsula gruesa de tejido inflamatorio, muchas veces como resultado de una infección bacteriana. Pueden establecerse en órganos como la piel, la cavidad oral, las encías y los huesos; ubicándose principalmente en la cara. Frecuentemente están involucrados agentes bacterianos como Pasteurella multocida, Streptococcus sp, Staphylococcus sp, Pseudomona sp. y algunos anaerobios como Actinomyces sp., Clostridium sp., Bacterioides sp. y Fusobacterium sp.

  9. Actinomycosis mimicking recurrent carcinoma after Whipple's operation

    Jun-Te Hsu; Hung-Chieh Lo; Yi-Yin Jan; Han-Ming Chen

    2005-01-01

    Actinomycosis is a rare, chronic, spreading, suppurative,granulomatous and fibrosing infection. Actinomyces are normal inhabitants of the oral cavity and gastrointestinal tract. They rarely cause disease and are seldom reported as pathogens. Herein, we reported on a 69-year-old male patient who had undergone Whipple's operation due to ampulla Vater carcinoma, and became infected with actinomycosis at the pancreaticojejunostomy, which mimicked a recurrent malignancy. He was treated with radical resection of the mass at the pancreaticojejunostomy and had an uneventful postoperative course.

  10. Infections Agents Found in 12 CGD Patients

    M Aziz Soltani

    2001-05-01

    Full Text Available specimens of infectious material obtained from 12 cases of chronic granulomatous disease (10 boys and 2 girls aged 3-6 years were examined for bacteriologic findings. 48% of the cultures were negative for bacteria, in the remaining 52% bacteria were isolated in the following incidence: Salmonella sp 10.5%, Klebsiella sp 10.5%, staph aureus 9.52%, E.coli 7.52%, aspergillus fumigatus 4.52%, strep pneumoniae, a-hemolytic streptococci, mycobacterium tuberculosis and candida albicans each 2.52%, staph epidermidis, actinomyces, pseudomonas aeroginosa and enterococcus sp each 1.52%