Taxonomy
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Phylum Actinobacteria, Class Actinobacteria , Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium  minutissimum (Sarkany et al. 1962) Collins and Jones 1983.
Two biotipes were described.
Historical synonyms:
 Corynebacterium  minutissimum Sarkany et al. 1962
Typical diphtheroids with single cells, V forms, palisades and clustering as “Chinese
letters”.
Colonies are convex,  with shiny and moist surface, have entire edges and 1.0-1.5
mm in diameter after 1 day of incubation; coral-red to orange fluorescence under
Wood’s light (365 nm) on rich media (containing 20% fetal calf serum). Most colonies
are of a creamy texture, but some may also be sticky.
CAMP test is negative. Facultatively anaerobic. Can grow in 6.5% NaCl.
Habitat is the human skin; is a member of the normal human skin flora. Susceptible to O/129.
Implicated in erythrasma, an asymptomatic skin infection and probably a polymicrobial process  in human.
Deep tissue invasion in a patient with recurrent breast abscesses.
Probably cases of bacteremia and one case of postoperative neck abscess in human.
Other disease association: wound infections, urinary tract infections.
  1. 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.
  2. Funke G ., 2006.Corynebacteria and rare coryneforms. In: Topley & Wilson’s Microbiology & Microbial Infections, 10th Edition,
    Edited by Borriello S.P., Murray P.R. and Funke G.,Edward Arnold (Publishers) Ltd., Bacteriology, volume 2.
  3. Cummins C.S., Lelliott R.A. and Rogosa M., 1975. Genus Corynebacterium Lehmann and Neumann 1896 . In: Buchanan R.E.
    and Gibbons N.E. (Editors), Bergey’s Manual of Determinative Bacteriology, Eight Edition, The Williams & Wilkins Company,
    Baltimore, 602-617.
  4. Diaconescu A. si Damian M., 2009. Identificarea corinebacteriilor. In: Buiuc D., Negut M. (Editori), Tratat de Microbiologie Clinica,
    Editia a III-a, Editura Medicala, Bucuresti, 620-651.
  5. Holt J.G., Krieg N.R., Sneath P.H.A., Staley J.T. and Williams S.T., 1994. Bergey's Manual of Determinative Bacteriology, Ninth
    Edition, Williams & Wilkins, A Waverly Company, Baltimore, pp 571-596.
Fermentative metabolism. Biotype1 ferments sucrose, while biotype 2 doesn't.

Positive results for alkaline phosphatase, DNase, hippurate hydrolysis, pyrazinamidase, tyrosine hydrolysis, acid production from:
fructose, glucose, maltose & ribose.

Negative results for casein hydrolysis, catalase, esculin hydrolysis, gelatinase, beta-glucuronidase, beta-galactosidase,
alpha-glucosidase, lipophilism, methyl red, nitrate reduction, pyrrolidonyl arylamidase, urease, acid production from: glycogen,
lactose, raffinose, starch, trehalose & xylose.

Acid production from mannitol is variable.
Corynebacterium minutissimum
(c) Costin Stoica
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