| Actinomyces howellii |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinomycetota, Class Actinomycetes, Order Actynomycetales, Suborder Actinomycinae, Family Actinomycetaceae, Genus
Actinomyces, Actinomyces howellii Dent and Williams 1984.
Actinomyces, Actinomyces howellii Dent and Williams 1984.
Gram-positive rods, 1.5-5.0 x 0.8 µm. Non-motile. Non-spore-forming.
Colonies on horse blood agar are white, convex, smooth, shiny, translucent, up to 2
mm in diameter after 3-5 days of anaerobic incubation at 37 ºC. Facultative anaerobic.
Liquid media: CO2 stimulates growth.
mm in diameter after 3-5 days of anaerobic incubation at 37 ºC. Facultative anaerobic.
Liquid media: CO2 stimulates growth.
Isolated from the dental plaque of dairy cattle.
Undetermined.
- Dent V.E., & Williams R.A.D., 1984. Actinomyces howellii, a new species from the dental plaque of dairy cattle. Int. J. Syst.
Bacteriol. Vol. 34, No. 3, 316-320.
Positive results for catalase, acidification of D-glucose, maltose, raffinose and sucrose.
Negative results for acid production from amygdalin, cellobiose, glycerol, inositol, inulin, mannitol, rhamnose, ribose and salicin.
Variable results for acid production from L-arabinose, lactose, mannose, melezitose, trehalose and D-xylose.
Negative results for acid production from amygdalin, cellobiose, glycerol, inositol, inulin, mannitol, rhamnose, ribose and salicin.
Variable results for acid production from L-arabinose, lactose, mannose, melezitose, trehalose and D-xylose.
(c) Costin Stoica
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