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Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium propinquum Riegel, De Briel, Prevost, Jehl and Monteil 1994.

Historical synonyms: CDC coryneform group ANF-3.
Gram-positive, typical corynebacterial forms.
Colonies are matted surface, 1-2 mm in diameter after 24 h of incubation at 37 ºC on
sheep blood agar. Hemolysis is not produced. CAMP reaction is negative.
Isolated mainly from respiratory tract specimens. Susceptible to beta-lactam antibiotics.
It has not been described as a causative agent of lower respiratory tract infections so far.
  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.
Oxidative metabolism.

Positive results for nitrate reduction & tyrosine hydrolysis.

Negative results for esculin hydrolysis, lipophilism, acid production from: glucose, maltose, mannitol, sucrose & xylose.

Variable results for alkaline phosphatase, pyrazinamidase & urease.
Corynebacterium propinquum
(c) Costin Stoica
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