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Phylum Actinobacteria, Class Actinobacteria, Order Micrococcales, Family Brevibacteriaceae, Genus Brevibacterium, Brevibacterium
otitidis
Pascual, Collins, Funke and Pitcher, 1996.
Gram-positive relatively short rods with a marked rod-coccus cycle when growing on
complex media; young culture (up to 24 h) produce coryneform rods with V
arrangements, while older cells are coccoid or coccobacillary and decolorize easily.
Nonmotile. Spores are not produced. Mycolic acids are not present.
Colonies are opaque, convex, friable with dry texture, white-yellow after 24 hours of
incubation at 30-37 ºC in 5% CO
2 atmosphere on 5% sheep blood Columbia agar.
CAMP test is negative. Aerobic. Nonfastidious. Grows at 37 ºC. No growth at 10 or 20
ºC.
Isolated from a human ear infection.
May be involved in otitis.
  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. Trujillo M.E. and Goodfellow M., 2012. Genus I. Brevibacterium Breed 1953, emend. Collins, Jones, Keddie and Sneath 1980.In:
    Goodfellow M., Kampfer P., Busse H.J., Trujillo M.E., Suzuki K., Ludwig W. and Whitman W.B. (Editors), Bergey’s Manual of
    Systematic Bacteriology, second edition, Vol. Five, The Actinobacteria, Part A, Springer, Athens, pp. 685-700.
Oxidative metabolism. Not acid fast.

Positive results for casein hydrolysis, catalase, DNA hydrolysis, gelatin hydrolysis, pyrazinaminidase, pyrrolidone peptidase &  
xanthine hydrolysis.

Negative results for esculin hydrolysis, alpha-glucosidase, lipase, nitrate reduction, starch hydrolysis, urease, acid production from:
mannitol, phenylacetate & xylose.

Cannot utilize D-arabinose, gluconate & mannitol.
Brevibacterium otitidis
(c) Costin Stoica
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