| Klebsiella aerogenes |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacteriales, Family Enterobacteriaceae, Genus Enterobacter,
Klebsiella aerogenes (Hormaeche and Edwards 1960) Tindall et al. 2017.
Synonyms: Enterobacter aerogenes Hormaeche and Edwards 1960,
Klebsiella mobilis Bascomb et al. 1971.
Klebsiella aerogenes (Hormaeche and Edwards 1960) Tindall et al. 2017.
Synonyms: Enterobacter aerogenes Hormaeche and Edwards 1960,
Klebsiella mobilis Bascomb et al. 1971.
Gram-negative rods. Motile.
Colonies on nutritive agar are round, 2-3 mm in diameter, and slightly iridescent and,
nonpigmented. Incubation temperature 30-37 ºC. Can grow at 15-42 ºC. Grows on
simple media and on selective media for Enterobacteriaceae. Facultatively anaerobic.
Grows on KCN.
nonpigmented. Incubation temperature 30-37 ºC. Can grow at 15-42 ºC. Grows on
simple media and on selective media for Enterobacteriaceae. Facultatively anaerobic.
Grows on KCN.
Occur in water, sewage, soil, dairy products, and the feces of humans and animals.
Considered a nosocomial, opportunistic pathogen. Produces antigenically similar fimbriae to Klebsiella pneumoniae.
- Bascomb S, Lapage SP, Willcox WR, Curtis MA. Numerical classification of the tribe Klebsielleae. J Gen Microbiol 1971; 66:279-
295. - Tindall BJ, Sutton G, Garrity GM. Enterobacter aerogenes Hormaeche and Edwards 1960 (Approved Lists 1980) and Klebsiella
mobilis Bascomb et al. 1971 (Approved Lists 1980) share the same nomenclatural type (ATCC 13048) on the Approved Lists and
are homotypic synonyms, with consequences for the name Klebsiella mobilis Bascomb et al. 1971 (Approved Lists 1980). Int J
Syst Evol Microbiol 2017; 67:502-504. - J. G. Holt et al., 1994. Facultatively Anaerobic Gram-Negative Rods. Subgroup 1. Family Enterobacteriaceae. In: Begey’s Manual of
Determinative Bacteriology, 9th-edition, Williams & Wilkins, pp 175-189. - Don J. Brenner and J.J. Farmer III, 2001. Family I. Enterobacteriaceae. In: Bergey’s Manual of Systematic Bacteriology, Second
edition, Vol two, part B, George M. Garrity (Editor-in-Chief), pp 587-897.
Positive results for catalase, citrate (Simmons), esculin hydrolysis, lysine decarboxylase, ONPG, ornithine decarboxylase, nitrate
reduction, Voges-Proskauer test, acid production from alpha-methyl-D-glucoside, L-arabinose, D-arabitol, cellobiose, glycerol,
glucose, myo-inositol, lactose, maltose, mannitol, mannose, melibiose, mucate, raffinose, L-rhamnose, salicin, D-sorbitol, sucrose,
trehalose, and D-xylose.
Negative results for arginine dihydrolase, DN-ase, indole production, H2S production, lipase, methyl red test, phenylalanine, gelatin
hydrolysis, oxidase, urease, and acid production from dulcitol.
Variable results for acid production from starch.
reduction, Voges-Proskauer test, acid production from alpha-methyl-D-glucoside, L-arabinose, D-arabitol, cellobiose, glycerol,
glucose, myo-inositol, lactose, maltose, mannitol, mannose, melibiose, mucate, raffinose, L-rhamnose, salicin, D-sorbitol, sucrose,
trehalose, and D-xylose.
Negative results for arginine dihydrolase, DN-ase, indole production, H2S production, lipase, methyl red test, phenylalanine, gelatin
hydrolysis, oxidase, urease, and acid production from dulcitol.
Variable results for acid production from starch.
(c) Costin Stoica
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