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Phylum Actinobacteria, Class Actinobacteria , Subclass Actibacteridae, Order Actynomycetales, Suborder Corynebacterinae, Family
Corynebacteriaceae, Genus Corynebacterium,
Corynebacterium ammoniagenes (Cooke and Keith 1927) Collins 1987.

Historical synonyms:
Brevibacterium ammoniagenes (Cooke and Keith 1927) Breed 1953, Bacterium ammoniagenes Cooke and
Keith 1927.
Gram positive irregular rods, 1.0-4.5 x 0.6-1.2 µm, and occur singly, in pairs and in ‘V’
forms. Non-motile. Asporogenic. Tuberculostearic acid is present.
Colonies are grey–white or yellow,  low convex with an entire edge. Facultative
anaerobic. CAMP test is negative. Grows at/in : 10, 30 (optimum), and 37 ºC. No
growth at 45 ºC. Grows in: 10% NaCl media.
Isolated from feces of infants and piggery waste.
Causes nappy rash in infants.
  1. Bernard K.A., Wiebe D., Burdz T., Reimer A., Ng B., Singh C., Schindle S. and Pacheco A.L., 2010. Assignment of Brevibacterium
    stationis (ZoBell and Upham 1944) Breed 1953 to the genus Corynebacterium, as Corynebacterium stationis comb. nov., and
    emended description of the genus Corynebacterium to include isolates that can alkalinize citrate. Int J Syst Evol Microbiol 60, 874-
    879.
  2. Collins M.D., 1987. Transfer of Brevibacterium ammoniagenes (Cooke and Keith) to the Genus Corynebacterium as
    Corynebacterium ammoniagenes comb. nov. Int J Syst Bacteriol Vol 37, No. 4, 442-443.
Non-acid-fast. Description is based on APY ZYM, API 50CH and API Coryne results.

Positive results for catalase, hippurate hydrolysis, nitrate reduction (no nitrite reduction), Simmon’s citrate, tyrosine hydrolysis, urease,
acid production from ribose.

Negative results for acid phosphatase, alkaline phosphatase, arginine decarboxylase, casein hydrolysis, cellulose hydrolysis, chitin
hydrolysis, cystine arylamidase, DN-ase, esterase lipase, alpha-fucosidase, gelatinase, beta-glucuronidase, alpha- and beta-
galactosidase, alpha-glucosidase, N-acetyl-beta-glucosaminidase, indole production, lipase, lipophilism, lysine decarboxylase,
alpha-mannosidase, methyl-red reaction, ornithine decarboxylase, oxidase, pyrazinamidase, starch hydrolysis, trypsin, alpha-
chymotrypsin, valine arylamidase, Voges -Proskauer test, xanthine hydrolysis, acid production from: aesculin, galactose, glycerol,
glycogen, lactose, maltose, mannitol, mannose, raffinose, salicin, sucrose, trehalose & xylose.

Variable results for esterase & leucine arylamidase.
Corynebacterium ammoniagenes
(c) Costin Stoica
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