| Actinomyces meyeri |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinomycetota, Class Actinomycetes, Order Actynomycetales, Suborder Actinomycinae, Family Actinomycetaceae, Genus
Actinomyces, Actinomyces meyeri Cato, Moore, Nygaard and Holdeman 1984.
Historical synonym: Actinobacterium meyeri Prevot 1938.
Actinomyces, Actinomyces meyeri Cato, Moore, Nygaard and Holdeman 1984.
Historical synonym: Actinobacterium meyeri Prevot 1938.
Gram-positive short rods, 0.5-0.9 / 0.9-3.0 µm, occasionally with terminal swellings;
occuring in pairs, short chains or clumps. Non-motile. Non-spore-forming.
occuring in pairs, short chains or clumps. Non-motile. Non-spore-forming.
Colonies are pinpoint to 1 mm in diameter, flat to convex, translucent to opaque,
white, with shiny and smooth surfaces on supplemented (vitamin K1 and Tween 80)
BHI blood agar after anaerobic incubation; no growth after aerobic incubation. There
is growth in peptone-yeast extract-glucose broth supplemented with vitamin K1,
hemin and Tween 80. The requirement for vitamin K1 is absolute and the growth is
stimulated by 0.02% Tween 80 and by fermentable carbohydrate. No growth in 20%
bile or 6.5% NaCl. Alpha- or non-hemolytic. Grows at 25-37 ºC; no growth at 45 ºC.
white, with shiny and smooth surfaces on supplemented (vitamin K1 and Tween 80)
BHI blood agar after anaerobic incubation; no growth after aerobic incubation. There
is growth in peptone-yeast extract-glucose broth supplemented with vitamin K1,
hemin and Tween 80. The requirement for vitamin K1 is absolute and the growth is
stimulated by 0.02% Tween 80 and by fermentable carbohydrate. No growth in 20%
bile or 6.5% NaCl. Alpha- or non-hemolytic. Grows at 25-37 ºC; no growth at 45 ºC.
The principal habitat is human periodontal sulci.
Isolated from human clinical specimens. Susceptible to clindamycin, erythromycin, penicillin G and tetracycline.
Isolated from human clinical specimens. Susceptible to clindamycin, erythromycin, penicillin G and tetracycline.
Isolated from purulent pleural fluid, abscesses of brain, hips, hands, feet, spleen and from bite wounds.
- Cato E.P., Moore W.E.C., Nygaard G. and Holdeman L.V., 1984. Actinomyces meyeri sp. nov., specific epithet rev. Int. J. Syst.
Bacteriol., Vol. 34, N0. 4, 487-489.
Description is based on API ZYM results.
Positive results for alpha-glucosidase, acid production from: fructose, D-glucose, maltose, sucrose, ribose, starch and xylose.
Negative results for catalase, esculin hydrolysis, gelatin hydrolysis, hippurate hydrolysis, H2S production, indole production, lipase
C14, lecithinase, nitrate reduction, starch hydrolysis, Voges-Proskauer reaction, acid production from: cellobiose, dulcitol, erythritol,
esculin, inositol, inulin, mannitol, mannose, melibiose, melezitose, pectin, raffinose, rhamnose, salicin, sorbitol, sorbose and
trehalose.
Variable results for urease, acid production from: adonitol, amygdalin, arabinose, galactose, glycogen, glycerol and lactose.
Positive results for alpha-glucosidase, acid production from: fructose, D-glucose, maltose, sucrose, ribose, starch and xylose.
Negative results for catalase, esculin hydrolysis, gelatin hydrolysis, hippurate hydrolysis, H2S production, indole production, lipase
C14, lecithinase, nitrate reduction, starch hydrolysis, Voges-Proskauer reaction, acid production from: cellobiose, dulcitol, erythritol,
esculin, inositol, inulin, mannitol, mannose, melibiose, melezitose, pectin, raffinose, rhamnose, salicin, sorbitol, sorbose and
trehalose.
Variable results for urease, acid production from: adonitol, amygdalin, arabinose, galactose, glycogen, glycerol and lactose.
(c) Costin Stoica
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