Genus Moellerella
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacteriales, Family Enterobacteriaceae, Genus Moelerella,  
Moellerella wisconsensis Hickman-Brenner et al. 1984. Type species of the genus.
Gram negative, straight rods. Non-motile.
Colonies resemble Escherichia coli. No special growth requirements. Facultatively
anaerobic, growth temperature 30 - 37 ºC. Grow on media:
  1. Nutrient agar or nutrient broth;
  2. Trypticase Soy Agar ± 5% sheep blood;
  3. MacConkey agar – red colonies;
  4. Drigalski.
Rarely isolated from human feces & other clinical specimens. Some strains were isolated from food, water and feces of birds
(Falconiformes, Strigiformes) & insects (
Lutzomyia longipalpis). Resistant to colistin, penicillin, ampicillin & carbenicillin.
Unclear significance; opportunistic pathogen. Moellerella wisconsensis has been associated with diarrhoea. Also, was isolated from
an infected human gallbladder.
  1. J. G.Holt et al., 1994. Begey’s manual of Determinative Bacteriology, 9th-edition, Williams & Wilkins.
  2. 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.
  3. Hickman-Brenner F.W., Huntley-Carter G.P., Saitoh Y., Steigerwalt A.G., Farmer III J.J. & Brenner D.J.: Moellerella wisconsensis, a
    new genus and species of Enterobacteriaceae found in human stool specimens. J. Clin. Microbiol., 1984, 19, 460-463.
Positive results dor nitrate reduction, methyl red, citrate utilization (Simmons),ONPG,
catalase, acid production from: lactose, glucose (without gas), sucrose, adonitol,
raffinose, melibiose, D-arabitol, D-mannose & D-galactose.

Negative results for oxidase, indole production, Voges–Proskauer, H
2S production (TSI), urea hydrolysis, phenylalanine deaminase,
lysine decarboxylase, arginine dihydrolase, ornithine decarboxylase, malonate utilization, esculin hydrolysis, gelatin hydrolysis (22 °
C), lipase (corn oil), DN-ase, acid production from: dulcitol, salicin, myo-inositol, D-sorbitol, L-arabinose, L-rhamnose, D-xylose,
trehalose, cellobiose, alpha-methyl-D-glucoside, erythritol, glycerol & mucate.
(c) Costin Stoica
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