Phylum Actinobacteria, Class Actinobacteria, Order Micrococcales, Family Dermabacteraceae, Genus Dermabacter, Dermabacter
hominis Jones and Collins 1989.
Historical synonyms: CDC coryneform groups 3 and 5.
Gram-positive short rods. Non-motile. Non-spore-forming. Mycolic acids are not
Colonies are small, white, cream, convex, with a distinctive, pungent odor. CAMP test
is negative. Facultative anaerobic. Grows at 37 ºC, but not at 10 ºC. Variable growth at
45 ºC. Can grow in 5% NaCl media.
Isolated from human blood cultures, abscesses, wounds, skin lesions, eyes.
Susceptible to cephalosporins and rifampin.
- Funke G., von Graevenitz A., Clarridge III J.E., and Bernard K.A., 1997. Clinical Microbiology of Coryneform Bacteria. Clinical
Microbiology Rewiews Vol. 10, No. 1, p. 125-159.
- Jones D. and Collins M.D., 1988. Taxonomic studies on some human cutaneous coryneform bacteria: Description of
Dermabacter hominis gen.nov., sp.nov. FEMS Microbiology Letters 51, 51-56.
Non-acid fast. Fermentative metabolism.
Some tests' description is based on API CORYNE results (codes: 64470765, 4570165, 4570364, 4570365 and 4570765).
Positive results for casein hydrolysis, catalase, DNA hydrolysis, esculin hydrolysis, gelatin hydrolysis, alpha-glucosidase, beta-
galactosidase, lecithinase, leucine arylamidase, lysine decarboxylase, alpha-mannosidase, ornithine decarboxylase, starch
hydrolysis, acid production from: amygdalin, cellobiose, fructose, galactose, gentiobiose, glucose, N-acetylglucosamine, lactose,
maltose, D-mannose, melezitose, melibiose, D-raffinose, ribose, sucrose, trehalose & D-turanose.
Negative results for cellulose hydrolysis, alpha-galactosidase, beta-glucosidase, beta-glucuronidase, hippurate hydrolysis, nitrate
reduction, oxidase, tyrosine hydrolysis, urease, valine arylamidase, Voges-Proskauer test, xanthine hydrolysis, acid production from:
adonitol, arabinose, arabitol, erythritol, fucose, glycerol, glycogen, gluconate, inositol, inulin, mannitol, rhamnose, sorbitol, tagatose &
Variable results for H2S production, pyrazinamidase, acid production from: arbutin, salicin & xylose.
(c) Costin Stoica