Phylum Actinobacteria, Class Actinobacteria, Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium, Corynebacterium pilosum Yanagawa and Honda 1978.
Corynebacterium renale group
Gram-positive straight to slightly curved rods, 0.5-2.6 µm, often occurring in angular or
palisade arrangements; metachromatic granules; numerous pili are present.
White, semitranslucent colonies on nutrient agar and on serum agar, small, not
readily visible after 24 h at 37 ºC
In broth, there was slight turbidity, but no pellicle.
Hemolysis is not produced. CAMP reaction is positive. Aerobic, facultative anaerobic.
Can grow at pH 9.0, or at 41.5 ºC. No growth in pH 5.4.
Isolated from cows that showed signs of cystitis and pyelonephritis.
Cells cannot resist 30 min at 56 ºC. Susceptible to kanamycin, erythromycin, neomycin, bacitracin, and terramycin.
Cause genitourinary infections (cystitis and pyelonephritis) in animals, especially in cattle.
- 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.
- 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.
- Yanagawa R. and Honda E., 1978. Corynebacterium pilosum and Corynebacterium cystitidis, Two New Species from Cows. IJSB
Vol. 28, No. 2, p. 209-216.
Positive results for catalase, hippurate hydrolysis, pyrazinamidase, starch hydrolysis, Tween 80 hydrolysis, urease, acid production
from: dextrin, fructose, glucose, maltose, starch, trehalose & xylose.
Negative results for alkaline phosphatase, arginine decarboxylase, casein hydrolysis, esculin hydrolysis, gelatinase, H2S production,
indole production, lipophilism, lysine decarboxylase, mannose, methyl red, nitrate reduction, ornithine decarboxylase, oxidase,
phenylalanine deaminase, tyrosine hydrolysis, Voges-Proskauer reaction, acid production from: arabinose, galactose, lactose,
mannitol, raffinose, rhamnose, salicin & sucrose .
(c) Costin Stoica