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Phylum Actinobacteria, Class Actinobacteria , Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium auris Funke, Lawson and Collins 1995.

Historical synonyms: some strains were included in CDC coryneform group ANF-1 (absolute nonfermentative).
Gram-positive, typical irregular coryneform rods or coccobacilli, that sometimes contain
metachromatic granules; are  arranged  in typical V-shaped forms or palisades.
Nonmotile. Nonsporing.
Colonies are convex, dry, slightly adherent to agar, become slightly yellowish with
time, 1-2 mm in diameter after 48 h of incubation at 37 ºC on sheep blood agar.
Hemolysis is not produced. CAMP reaction is positive.
Isolated exclusively from specimens of pedriatic patients with otitis media.
Susceptible to ciprofloxacin, gentamicin, rifampin, tetracycline and vancomycin. Resistant to penicillin G.
Isolated exclusively from patients with ear 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. Funke G., Lawson P.A. and Collins M.D., 1995. Heterogeneity within Human-Derived Centers for Disease Control and Prevention
    (CDC) Coryneform Group ANF-1-Like Bacteria and description of Corynebacterium auris sp. nov. IJSB Vol. 45, No. 4, p. 735-739.
Not acid fast. Oxidative metabolism.

Positive results for acid phosphatase, alkaline phosphatase, catalase, esterase,
lipase & pyrazinamidase.

Negative results for esculin hydrolysis, lipophilism, nitrate reduction, urease, acid production from: glucose, glycogen, lactose, maltose,
mannitol, ribose, sucrose & xylose.
Corynebacterium auris
(c) Costin Stoica
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