Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Actinomycinae, Family
Actinomycetaceae, Genus Actinomyces, Actinomyces slackii Dent and Williams 1986.
Gram-positive rods, 0.8 / 0.56 µm. Non-motile. Non-spore-forming.
Colonies on horse 6% blood agar are white, convex, smooth, shiny, translucent, up to
2 mm in diameter after 3-5 days of aerobic incubation at 37 ºC. Grows aerobically or
in 80% nitrogen-10% hydrogen-10% CO2 atmosphere. Liquid media: CO2 stimulates
Isolated from the dental plaque of dairy cattle.
- Dent V. E. and Williams R.A.D., 1986. Actinomyces slackii sp. nov. from dental plaque of dairy cattle. Int J Syst Bacteriol Vol.36, No.
Positive results for catalase, acid production from D-glucose, raffinose and salicin.
Negative results for esculin hydrolysis, acid production from L-arabinose, amygdalin, cellobiose, glycerol, inositol, D-mannitol,
melezitose, L-rhamnose, sorbitol and D-xylose.
Variable results for acid production from inulin, lactose, D-mannose, D-ribose, sucrose (saccharose) and trehalose.
(c) Costin Stoica