Actinomyces dentalis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Actinomycinae, Family
Actinomycetaceae, Genus Actinomyces,
Actinomyces dentalis  Hall, Collins, Lawson, Falsen, and Duerden 2005.

Species description is based on a single isolate.
Gram-positive filamentous, beaded rods. Non-motile. Non-spore-forming.
Colonies are tiny, white, breadcrumb-like on Fastidious Anaerobic Agar with 5%
horse blood after 48 h of anaerobic incubation and pit the agar
. Anaerobic.
Isolated from human dental abscess. Habitat is not known.
Isolated from human dental abscess.
  1. Hall V., Collins M.D., Lawson P.A., Falsen E., and Duerden B.I., 2005. Actinomyces dentalis sp. nov., from a human dental
    abscess. J. Syst. Evol. Microbiol. 55, 427-431.
Non-acid-fast.
Most results are based on API CORYNE, API rapid ID32Strep and API rapid ID32A.


Positive results for
esculin hydrolysis, alpha-galactosidase, alpha- and beta-glucosidase, leucine arylamidase, acid production from:
cellobiose, fructose, D-glucose, lactose (weak reaction), maltose, mannose, melibiose, raffinose, sucrose & trehalose.

Negative results for
alkaline phosphatase, arginine dihydrolase, catalase, alpha-fucosidase, gelatin hydrolysis, beta-glucuronidase,
N-acetyl-beta-glucosaminidase, hippurate hydrolysis, indole production, nitrate reduction, pyrazinamidase, starch hydrolysis, urease,  
Voges-Proskauer test,
acid production from: L-arabinose, D-arabitol, cyclodextrin, methyl-beta-D-glucopyranoside, glycogen,
mannitol, melezitose, pullulan, ribose, sorbitol, tagatose & D-xylose.


Variable results for
beta-galactosidase.
(c) Costin Stoica
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