| Actinomyces oris |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Actinomycinae, Family
Actinomycetaceae, Genus Actinomyces, Actinomyces oris Henssge, Do, Radford, Gilbert, Clark and Beighton, 2009.
Historical synonyms: Actinomyces naeslundii genospecies 2 (Johnson et al., 1990) Thompson and Lovestedt 1951, Actinomyces
naeslundii serotypes II, III and NV, Thompson and Lovestedt 1951, A. viscosus serotype II (Johnson et al., 1990) Georg et al. 1969.
Actinomycetaceae, Genus Actinomyces, Actinomyces oris Henssge, Do, Radford, Gilbert, Clark and Beighton, 2009.
Historical synonyms: Actinomyces naeslundii genospecies 2 (Johnson et al., 1990) Thompson and Lovestedt 1951, Actinomyces
naeslundii serotypes II, III and NV, Thompson and Lovestedt 1951, A. viscosus serotype II (Johnson et al., 1990) Georg et al. 1969.
Gram-positive diphtheroid rods, sometimes occurring in curved or branched filaments.
Non-motile. Non-spore-forming.
Non-motile. Non-spore-forming.
Colonies are flat, round with entire edges, small after 24 h on BHI agar; after 7-14 days
the colonies are 1-3 mm in diameter, convex, smooth or finely granular, white and soft.
In BHI broth grows as a flocculent mass to the top with discreet soft granules below.
Alpha-haemolysis may occur. Facultative anaerobic. Grows at 35-37 ºC, optimally.
No growth at 25 ºC.
the colonies are 1-3 mm in diameter, convex, smooth or finely granular, white and soft.
In BHI broth grows as a flocculent mass to the top with discreet soft granules below.
Alpha-haemolysis may occur. Facultative anaerobic. Grows at 35-37 ºC, optimally.
No growth at 25 ºC.
Isolated from human sputum, human abscess, gingival crevice, subgingival plaque and from hamster.
Undetermined.
- Slack J.M., 1975. Genus Actinomyces Harz 1877 . In: Buchanan R.E. and Gibbons N.E. (Editors), Bergey’s Manual of
Determinative Bacteriology, Eight Edition, The Williams & Wilkins Company, Baltimore, 660-667. - Henssge U., Do T., Radford D.R., Gilbert S.C., Clark D. and Beighton D., 2009. 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. Int J Syst Evol Microbiol. 59, 509-516. - Johnson J.L., Moore L.V.H., Kaneko B. and Moore W.E.C., 1990. Actinomyces georgiae sp. nov. , Actinomyces gerencseriae sp.
nov. , Designation of Two Genospecies of Actinomyces naeslundii, and Inclusion of A. naeslundii serotypes II and III and
Actinomyces viscosus serotype II in A. naeslundii Genospecies 2. Int J Syst Bacteriol Vol. 40, No. 3, 273-286.
Non-acid-fast.
Description is based on API Rapid ID 32A results.
Positive results for alpha- and beta-galactosidase, beta-glucosidase, leucine arylamidase, methyl red, acid production from: fructose,
glucose, inositol, maltose, raffinose & sucrose.
Negative results for alkaline phosphatase, arginine dihydrolase, alpha-fucosidase, gelatin hydrolysis, hippurate hydrolysis, indole
production, beta-glucuronidase, N-acetyl-beta-glucosaminidase, pyrrolidonyl arylamidase, starch hydrolysis, urease,
Voges-Proskauer test, acid production from: amygdalin, D-arabinose, esculin, mannitol, rhamnose & xylose.
Variable results for catalase, esculin hydrolysis, alpha-glucosidase, nitrate reduction, acid production from: cellobiose, glycogen,
lactose, mannose, melibiose, melezitose, ribose, salicin, sorbitol, starch & trehalose.
Description is based on API Rapid ID 32A results.
Positive results for alpha- and beta-galactosidase, beta-glucosidase, leucine arylamidase, methyl red, acid production from: fructose,
glucose, inositol, maltose, raffinose & sucrose.
Negative results for alkaline phosphatase, arginine dihydrolase, alpha-fucosidase, gelatin hydrolysis, hippurate hydrolysis, indole
production, beta-glucuronidase, N-acetyl-beta-glucosaminidase, pyrrolidonyl arylamidase, starch hydrolysis, urease,
Voges-Proskauer test, acid production from: amygdalin, D-arabinose, esculin, mannitol, rhamnose & xylose.
Variable results for catalase, esculin hydrolysis, alpha-glucosidase, nitrate reduction, acid production from: cellobiose, glycogen,
lactose, mannose, melibiose, melezitose, ribose, salicin, sorbitol, starch & trehalose.
(c) Costin Stoica
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