| Morganella psychrotolerans |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacterales, Family Morganellaceae, Genus Morganella,
- Morganella psychrotolerans Emborg et al. 2006.
- Morganella psychrotolerans Emborg et al. 2006.
Gram-negative, 1.0 x 2.0-3.0 µm, straight rods with rounded ends, occurring singly
and in short chains. Motile.
and in short chains. Motile.
Growth occurs at 2-35 ºC (77 % grew at 0 ºC), in zero to close to 7.5% (w/v) NaCl (46%
of strainsgrew in 7.5 % NaCl) and at pH 4.6-9.2 (77 % grew at pH 4.6). Facultatively
anaerobic
of strainsgrew in 7.5 % NaCl) and at pH 4.6-9.2 (77 % grew at pH 4.6). Facultatively
anaerobic
Isolated from various seafoods.
Involved in histamine fish poisoning caused by eating seafood in which bacteria have produced high concentrations of histamine.
- Emborg Jette, Dalgard Paw & Ahrens Peter: Morganella psychrotolerans sp. nov., a histamine-producing bacterium isolated
from various seafoods. Int. J. Syst. Evol. Microbiol., 2006, 56, 2473-2479. - Adeolu M, Alnajar S, Naushad S, S Gupta R. Genome-based phylogeny and taxonomy of the 'Enterobacteriales': proposal for
Enterobacterales ord. nov. divided into the families Enterobacteriaceae, Erwiniaceae fam. nov., Pectobacteriaceae fam. nov.,
Yersiniaceae fam. nov., Hafniaceae fam. nov., Morganellaceae fam. nov., and Budviciaceae fam. nov. Int J Syst Evol Microbiol
2016; 66:5575-5599.
Positive results for catalse, indole production, nitrate reduction, phenylalanine deamination, tyrosine degradation, urease, acid
production from glucose (with gas production), D-fructose, gluconate, D-mannose, N-acetylglucosamine, D-ribose, and xylitol.
Negative results for citrate utilization, beta-galactosidase, gelatinase, lysine decarboxylase, oxidase, Voges-Proskauer, acid
production from D-adonitol, arabinose, arabitol, amygdalin, arbutin, D-cellobiose, dulcitol, esculin,erythritol, fucose, glycerol, glycogen,
gentiobiose, 2- and 5-ketogluconate, inositol, inulin, methyl alpha-D-mannopyranoside, methyl alpha-D-glycopyranoside, D-lactose,
D-lyxose, D-mannitol, D-maltose, D-melibiose, melezitose, D-raffinose, L-rhamnose, D-sorbitol, salicin, starch, L-sorbose, D-
sucrose, D-trehalose, D-turanose, D-tagatose, and xylose.
Variable results for ornithine decarboxylase, tryptophan deaminase, acid production from trehalose.
H2S is produced from cysteine, but not from thiosulfate.
Morganella psychrotolerans can be differentiated from M. morganii by the ability to grow at 2 ºC but not 37 ºC, inability to grow in 8.5%
NaCl, variable fermentation of D-trehalose (negative for M. morganii) and no fermentation of D-galactose (positive for M. morganii).
production from glucose (with gas production), D-fructose, gluconate, D-mannose, N-acetylglucosamine, D-ribose, and xylitol.
Negative results for citrate utilization, beta-galactosidase, gelatinase, lysine decarboxylase, oxidase, Voges-Proskauer, acid
production from D-adonitol, arabinose, arabitol, amygdalin, arbutin, D-cellobiose, dulcitol, esculin,erythritol, fucose, glycerol, glycogen,
gentiobiose, 2- and 5-ketogluconate, inositol, inulin, methyl alpha-D-mannopyranoside, methyl alpha-D-glycopyranoside, D-lactose,
D-lyxose, D-mannitol, D-maltose, D-melibiose, melezitose, D-raffinose, L-rhamnose, D-sorbitol, salicin, starch, L-sorbose, D-
sucrose, D-trehalose, D-turanose, D-tagatose, and xylose.
Variable results for ornithine decarboxylase, tryptophan deaminase, acid production from trehalose.
H2S is produced from cysteine, but not from thiosulfate.
Morganella psychrotolerans can be differentiated from M. morganii by the ability to grow at 2 ºC but not 37 ºC, inability to grow in 8.5%
NaCl, variable fermentation of D-trehalose (negative for M. morganii) and no fermentation of D-galactose (positive for M. morganii).
(c) Costin Stoica
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