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Topic: Actinomyces naeslundii

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	Actinomyces naeslundii Summary
		Members of the genus Actinomyces are normal residents of the mouth, throat, and intestinal tract.
		The pus, which is composed of dead bacteria, is granular, because of the presence of granules of sulfur that are made by the bacteria.
		Actinomyces naeslundii are Gram positive rod shaped bacteria that occupy the oral cavity.
	www.bookrags.com /Actinomyces_naeslundii (433 words)

	eMedicine - Actinomycosis : Article Excerpt by: Jorge M Quinonez, MD (Site not responding. Last check: 2007-10-23)
		Actinomyces are very closely related to Nocardia species, and, at one point in time, both were considered to be fungal organisms.
		Actinomyces grow well in enriched media with brain-heart infusion and may be aided in growth by an atmosphere of 6-10% ambient carbon dioxide.
		In general, Actinomyces species, being members of the normal flora, are agents of low pathogenicity and require disruption of the mucosal barrier to cause disease.
	www.emedicine.com /ped/byname/actinomycosis.htm (576 words)

	Medmicro Chapter 34
		Actinomyces israelii, A gerencseriae, A georgiae, A naeslundii, A odontolyticus, A meyeri, possibly A pyogenes and P propionicus are normal inhabitants of the human mouth and are found in saliva, on the tongue, in gingival crevice debris, and frequently in tonsils in the absence of clinical disease.
		Actinomyces bovis is not found in humans and, to date, the other species described from animals, with the exception of A pyogenes, have not been found in human specimens.
		Actinomyces and P propionicus are not found in the soil or on vegetation.
	gsbs.utmb.edu /microbook/ch034.htm (3416 words)

	Revista Iberoamericana de Micología (Site not responding. Last check: 2007-10-23)
		Actinomyces naeslundii, Actinomyces viscosus and Candida albicans are associated with root cavity.
		The aim of this study was to determine, in vitro, the effect produced by the metabolic substances elaborated by Actinomyces naeslundii and Actinomyces viscosus on Candida albicans.
		The effect of the time of incubation and of different concentrations of metabolic substances elaborated by Actinomyces naeslundii and Actinomyces viscosus on the kinetics of growth of C. albicans were studied.
	www.reviberoammicol.com /2004-21/p029034.shtml (289 words)

	[No title]
		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 amplified by PCR with degenerate primers derived from conserved amino acid sequences of the large catalytic subunit of urease in bacteria and plants.
		Actinomyces naeslundii, an early colonizer of the tooth surface, may enhance subsequent colonization by Porphyromonas gingivalis which is associated with adult periodontitis.
	www.lib.umich.edu /dentlib/nihcdc/searches/tanzer/tanzerActino1a-1.txt (17606 words)

	Robert J. Palmer 2003 3400
		Actinomyces taxonomy is based to a large degree on serological reactions (11), and fimbriae are an important factor in bacterial antigenicity.
		Although actinomyces cells that reacted with one or with both of the appropriate antibodies were readily discernible, their frequency of occurrence was low on the chips at 4 h and remained low at 8 h (Fig.
		Actinomyces, as detected by anti-type-2 and anti-type-1, were infrequent at 4- and 8-h time points, but cells labeled with these antibodies were easier to find at the 8-h time point.
	www.bionewsonline.com /6/r/robert_j_palmer_2003_3400.htm (5563 words)

	Actinomyces
		Not "Actinomyce" (sic) Meyen 1827, "Discomyces" Rivolta 1878, "Actinocladothrix" Affanassieff and Schulz 1889.
		naeslundii serotypes II and III and Actinomyces viscosus serotype II in A.
		REDDY (C.A.), CORNELL (C.P.) and FRAGA (A.M.): Transfer of Corynebacterium pyogenes (Glage) Eberson to the genus Actinomyces as Actinomyces pyogenes (Glage) comb.
	www.bacterio.cict.fr /a/actinomyces.html (2104 words)

	Bioline International Official Site (site up-dated regularly)
		Susceptibility of biofilms of Streptococccus sanguis and Actinomyces naeslundii to chlorhexidine
		Single species and two species biofilms comprising Streptococcus sanquis and Actinomyces naeslundii were established in order to determine the susceptibility to chlorhexidine of the bacteria growing in biofilms compared to planktonic growth, and when growing in single species biofilms compared to mixed biofilms.
		naeslundii in the mixed biofilm were attained after 24 h while each of the bacteria required 48 h for formation of single species biofilms of comparable cell numbers (Larsen and Fiehn, 1995), indicating that the two species are of mutual benefit to each other during colonization.
	www.bioline.org.br /request?bf97001 (3349 words)

	Faculty and Staff (Site not responding. Last check: 2007-10-23)
		These Gram-positive bacterial species are known to be causally involved in diseases of the oral cavity (enamel and root surface caries and gingivitis) and of other regions of the body (actinomycosis and bacterial endocarditis).
		Relationships among Actinomyces naeslundii (A. viscosus) bacteriophages isolated from sewage and the oral cavity.
		Growth of Actinomyces viscosus bacteriophage Av-1 in the presence of serum, saliva and dental plaque.
	bms.dental.umaryland.edu /faculty.asp?ID=19 (361 words)

	[No title]
		Actinomyces was the predominant genus, present in all individuals and comprising an average of 52% of all cells.
		An adjuvant effect of in vivo plaque accumulation was manifested by the enhancement of T lymphocytes in the mixed leucocyte culture reaction and of B lymphocytes, as shown by the increased response to lipopolysaccharide.
		The Actinomyces strains were recovered in two phena; the first contained Actinomyces israelii and the other facultative anaerobic Actinomyces, including subclusters equal to taxospecies of A. odontolyticus and A. viscosus/A. naeslundii, while the other phenon corresponded to the genera Arachnia, Actinobacterium, Bifidobacterium and Propionibacterium.
	www.lib.umich.edu /dentlib/nihcdc/searches/tanzer/tanzerActino1a-3.txt (8455 words)

	Actinomyces naeslundii causes modifications in morphology in fibroblast gingival (Site not responding. Last check: 2007-10-23)
		Actinomyces naeslundii causes modifications in morphology in fibroblast gingival
		The Actinomyces naeslundii is a prototyphe microorganism present in the parodontal disase of genral location due to its prsence in the salivaand detobacterial plaque -supragingival and subgingival.At the same time it has been determined that diffrent receptors adhere to salival proteins.
		Objectives: This study demostrated that Actinomyces naeslundii adheres and promotes the morphological alteraction and integrity of the citoesquetal of gingival human fibroblast.
	iadr.confex.com /iadr/2002SanDiego/techprogram/abstract_19787.htm (190 words)

	Characterization of the Fructosyltransferase Gene of Actinomyces naeslundii WVU45 -- Bergeron et al. 182 (13): 3649 -- ...
		Actinomyces naeslundii is a gram-positive, facultative anaerobe that is one of the primary colonizers of mucosal and tooth
		the abundance of Actinomyces in plaque and the likelihood that
		Genetic and physiologic characterization of urease of Actinomyces naeslundii.
	jb.asm.org /cgi/content/full/182/13/3649 (3592 words)

	9 OP (Site not responding. Last check: 2007-10-23)
		Enumeration, isolation and identification were made by use of established methods and was supplemented with a vast array of biochemical tests and gas chromatographic determination of metabolic and cellular fatty acid profiles specifically designed to identify the newly described Actinomyces spp.
		naeslundii increased from 9% (12 mos) to 30% (24 mos).
		odontolytius is one of the primary colonizers among Actinomyces spp.
	www.anaerobe.org /ab98/9op.htm (383 words)

	Infection of a Hip Prosthesis by Actinomyces naeslundii -- Wüst et al. 38 (2): 929 -- Journal of Clinical ...
		Infection of a Hip Prosthesis by Actinomyces naeslundii
		naeslundii infection is known in classical settings of actinomycosis in the head and the abdomen (2).
		Sclerosing osteomyelitis and Actinomyces naeslundii infection of surrounding tissues.
	jcm.asm.org /cgi/content/full/38/2/929 (1055 words)

	Development of a Novel Oligonucleotide Probe for Detecting Actinomyces naeslundii (Site not responding. Last check: 2007-10-23)
		Objectives: Actinomyces naeslundii (A. naeslundii) is a common bacterium assocaited with periodontal diseases and, occlusal and root surface caries.
		As the accuracy of biochemical identification is easily affected by both the biochemical and physiological similarity shared by different Actinomyces species, and the unstablity of biochemical properties in some species, using a probe of DNA sequence of 16S rRNA to detect A. naeslundii appears feasible, as the latter is highly conserved.
		A total of 20 strains of Actinomyces spp., comprising A. naeslundii (6), A. viscosus (3), A. israelii (5), A. bovis (2), A. meyeri (2), and A. odontolyticus (2) were used to test specificity of the probe.
	iadr.confex.com /iadr/2002SanDiego/techprogram/abstract_5565.htm (372 words)

	eMedicine - Actinomycosis : Article by Jorge M Quinonez, MD (Site not responding. Last check: 2007-10-23)
		Synonyms and related keywords: actinophytosis, lumpy jaw, Actinomyces, Actinomyces israelii, A israelii, Actinomyces naeslundii, A naeslundii, Actinomyces odontolyticus, A odontolyticus, Actinomyces viscosus, A viscosus, Actinomyces meyeri, A meyeri, infections of the oral region, infections of the cervicofacial region, cervicofacial actinomycosis, thoracic actinomycosis, abdominal actinomycosis, pelvic actinomycosis
		Actinomyces species commonly are present in high concentrations in tonsillar crypts and gingivodental crevices.
		Actinomyces is usually part of the normal flora; its presence on sputum samples, bronchial washings, or cervicovaginal secretions is not enough to make the diagnosis.
	www.emedicine.com /ped/topic26.htm (3099 words)

	Untitled Document (Site not responding. Last check: 2007-10-23)
		New medium for isolation of Actinomyces viscosus and Actinomyces naeslundii from dental plaque.
		The new medium (GMC), when incubated anaerobically, allowed 98% recovery of seven pure cultures of Actinomyces viscosus and 73% recovery of eight pure cultures of Actinomyces naeslundii, while suppressing 76% of the total count of other organisms in dental plaque samples.
		GMC medium appears to be useful for the isolation and presumptive identification of A. viscosus and A. naeslundii from dental plaque.
	www.dent.umich.edu /research/loeschelabs/abs1.4.html (159 words)

	Cariogenic Actinomyces Identified with a {beta}-Glucosidase-Dependent Green Color Reaction to Gardenia jasminoides ...
		Actinomyces naeslundii and Actinomyces viscosus are associated with dental caries (13, 25, 27).
		Characterization of actinomyces with genomic DNA fingerprints and rRNA gene probes.
		Detection and characterization of a lectin on Actinomyces viscosus T14V by monoclonal antibodies.
	jcm.asm.org /cgi/content/full/39/8/3009 (1720 words)

	CABRI: HyperCatalogue: Bacteria: DSMZ_BACT: Actinomyces naeslundii (Site not responding. Last check: 2007-10-23)
		Bacteria DSMZ_BACT Actinomyces naeslundii
		Actinomyces naeslundii, Thompson and Lovestedt 1951 AL Bacteria
		This work cannot be reproduced in whole or in part without the express written permission of the CABRI consortium.
	www.cabri.org /HyperCat/bact/dsb2029.htm (43 words)

	Oral bacteria may predict pregnancy outcomes
		They found that a higher salivary level of the bacteria called Actinomyces naeslundii Genospecies2 (A. naeslundii gsp2) is associated with low birth weight and preterm delivery, while higher levels of the bacteria Lactobacillus casei (L. casei) during pregnancy positively affected the birthweight."
		On the other hand, for one unit increase of L. casei levels there was a 42 gram increase (0.9 pounds) in birth weight and a 0.13 week increase in gestational age," said Vincent J. Iacono, DMD and president of the American Academy of Periodontology.
		EDITOR'S NOTE: A copy of the study "Salivary Actinomyces naeslundii Genospecies 2 and Lactobacillus casei Levels Predict Pregnancy Outcomes" is available to the media by contacting the AAP Public Affairs Department at 312/573-3244.
	www.eurekalert.org /pub_releases/2005-03/aaop-obm032205.php (474 words)

	RIBOTYPE PAPER.SCHACHTELE (Site not responding. Last check: 2007-10-23)
		Cellular DNA from 25 Actinomyces naeslundii and Actinomyces viscosus strains belonging to the 7 taxonomic clusters of Fillery et al.
		naeslundii ATCC 12104 and 398A from cluster 5).
		The genomic diversity revealed by DNA fingerprinting and ribotyping demonstrates that these techniques, which do not require phenotypic expression, are suited for study of the oral ecology of Actinomyces, and for epidemiological tracking of specific Actinomyces strains associated with caries lesions and sites of periodontal destruction.
	www1.umn.edu /dri/faculty/facultypages/schachtele/schac_ribotyp.html (256 words)

	Study of Humoral Immunity to Commensal Oral Bacteria in Human Infants Demonstrates the Presence of Secretory ...
		naeslundii genospecies 1 and 2 isolated from the infants.
		naeslundii genospecies 1 and 2 obtained from infants 18, 20, and 21.
		Oral administration of lipopolysaccharides activates B-1 cells in the peritoneal cavity and lamina propria of the gut and induces autoimmune symptoms in an autoantibody transgenic mouse.
	cdli.asm.org /cgi/content/full/11/3/473 (5899 words)

	eMedicine - Actinomycosis : Article Excerpt by: Talib Najjar, DMD, MDS, PhD (Site not responding. Last check: 2007-10-23)
		Usually, the disease is caused by Actinomyces israelii, an anaerobic gram-positive organisms that enters the tissue through a break in the mucosa (Eastridge, 1972).
		Israel further discovered that Actinomyces species do not survive outside mammalian hosts and that they are not found exogenously in plants or soil.
		All species of Actinomyces are normal commensal inhabitants of the oral and buccal cavities in humans and certain other mammals.
	www.emedicine.com /derm/byname/actinomycosis.htm (619 words)

	The Bioline EPrints Archive - Susceptibility of biofilms of Streptococccus sanguis and Actinomyces naeslundii to ... (Site not responding. Last check: 2007-10-23)
		The Bioline EPrints Archive - Susceptibility of biofilms of Streptococccus sanguis and Actinomyces naeslundii to chlorhexidine
		Larsen, Tove and Stoltze, Kaj and Fiehn, Nils-Erik (1997) Susceptibility of biofilms of Streptococccus sanguis and Actinomyces naeslundii to chlorhexidine.
		Resistance of S. sanguis and A. naeslundii to chlorhexidine increased considerably when growing in biofilms and >100 mg/ml was needed to eliminate growth of the bacteria.
	bioline.utsc.utoronto.ca /archive/00000032 (301 words)

	The Ben Davis Group - In the News
		They have found a way to tether a protease (protein-degrading enzyme) to the cell walls of Actinomyces naeslundii bacteria so that the enzyme can break down proteins that the bacteria use to invade their host.
		Actinomyces naeslundii stick to human oral cavities and surgical prostheses through adhesin proteins in the bacterial cell walls, which bind to sugar (galactose) molecules.
		figured that galactose groups attached to proteases would enable the enzymes to latch on to A. naeslundii, which would not only suppress the bacterium's stickiness by plugging their adhesin sites but would also wreak havoc when the enzyme got to work on the bacterial cell-wall proteins.
	users.ox.ac.uk /~dplb0149/news/index.html (1606 words)

	ExactAntigen actinomyces naeslundii
		(2004) Genotypic diversity of oral Actinomyces naeslundii genospecies 1 and 2 in caries-active preschool children Oral Microbiol Immunol 19:371-8.
		(2003) Genetic diversity of Actinomyces naeslundii genospecies 2 in mother-child pairs Arch Oral Biol 48:851-5.
		(2001) Roles of fructosyltransferase and levanase-sucrase of Actinomyces naeslundii in fructan and sucrose metabolism Infect Immun 69:5395-402.
	www.exactantigen.com /taxonomy/bacteria/a/actinomyces-naeslundii.html (296 words)

	Antibacterial effects of a bioactive glass paste on oral microorganisms (Site not responding. Last check: 2007-10-23)
		In an aqueous environment, Ca2+, Na+, PO4(3-), and Si4+ are released from the glass, resulting in a rise in pH and in osmotic pressure in its vicinity.
		Since these are factors that potentially influence the viability of oral microorganisms at the dentogingival margin, we studied the effects of bioactive glass S53P4 on the oral microorganisms Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Actinomyces naeslundii, Streptococcus mutans, and Streptococcus sanguis.
		naeslundii was found to lose its viability within 10 min under the experimental conditions.
	www.vivoxid.com /articles/dental-experimental/6 (269 words)

	Genetic and Physiologic Characterization of Urease of Actinomyces naeslundii -- Morou-Bermudez and Burne 67 (2): 504 -- ...
		Genetic and Physiologic Characterization of Urease of Actinomyces naeslundii -- Morou-Bermudez and Burne 67 (2): 504 -- Infection and Immunity
		and characterized the urease gene cluster of Actinomyces naeslundii,
		Bergeron, L. J., Morou-Bermudez, E., Burne, R. Characterization of the Fructosyltransferase Gene of Actinomyces naeslundii WVU45.
	iai.asm.org /cgi/lookup?vol=67&fp=504&view=abstract (437 words)

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