| Morganella morganii Gram-negative cells |
| Morganella morganii beta-haemolytic colonies on sheep blood agar |
| Morganella morganii |
Legend: + positive 90-100%, - negative 90-100%, [+] positive 75-89%, [-] negative 75-89%, d
positive 25-74% of strains
positive 25-74% of strains
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacterales, Family Morganellaceae, Genus Morganella,
- Morganella morganii subsp. morganii (Winslow et al. 1919) Jensen et al. 1992 - type species of the genus, old synonym Proteus
morganii,
- Morganella morganii subsp. sibonii Jensen et al. 1992.
- Morganella morganii subsp. morganii (Winslow et al. 1919) Jensen et al. 1992 - type species of the genus, old synonym Proteus
morganii,
- Morganella morganii subsp. sibonii Jensen et al. 1992.
Gram-negative, 1.0 x 1.7 µm, straight rods.
Large, gray, moist colonies (beta haemolytic). No special growth requirements.
Facultatively anaerobic, growth temperature 30-37 ºC and below. Grows on: Nutrient
agar or Nutrient brot; Trypticase Soy Agar ± 5% sheep blood; MacConkey agar.
Facultatively anaerobic, growth temperature 30-37 ºC and below. Grows on: Nutrient
agar or Nutrient brot; Trypticase Soy Agar ± 5% sheep blood; MacConkey agar.
Widely distributed in nature (soil, water, foods). Isolated from human & animal stools.
Unknown clinical significance – opportunistic pathogen. Isolated from intestine,
urinary infections, absceses, pericarditis, endophthalmitis (most infections occurred
after surgical interventions).
urinary infections, absceses, pericarditis, endophthalmitis (most infections occurred
after surgical interventions).
- 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. - Jensen K.T., Frederiksen W., Hickman-Brenner F.W., Steigerwalt A.G., Riddle C.F. & Brenner D.J.: Recognition of Morganella
subspecies, with proposal of Morganella morganii subsp. morganii subsp. nov. and Morganella morganii subsp. sibonii subsp.
nov. Int. J. Syst. Bacteriol., 1992, 42, 613-620. - Fulton MacD.: The identity of Bacterium columbensis Castellani. Journal of Bacteriology, 1943, 46, 79-81.
- 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. - 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 catalase, urease, phenylalanine deaminase, nitrate reduction,
tartrate and acid production from: glucose (with gas production) and galactose.
Negative results for oxidase, ONPG, arginine dihydrolase, citrate utilization, H2S
production, Voges-Proskauer reaction, gelatinase, malonate utilization, esculin
hydrolysis, acetate utilization, DN-ase, lipase, acid production from lactose, mannitol,
inositol, sorbitol, rhamnsoes, sucrose, melibiose, arabinose, cellobiose, dulcitol,
glycerol, alpha-methyl-D-glucoside, raffinose, salicin, xylose, mucate, erythritol and
adonitol.
tartrate and acid production from: glucose (with gas production) and galactose.
Negative results for oxidase, ONPG, arginine dihydrolase, citrate utilization, H2S
production, Voges-Proskauer reaction, gelatinase, malonate utilization, esculin
hydrolysis, acetate utilization, DN-ase, lipase, acid production from lactose, mannitol,
inositol, sorbitol, rhamnsoes, sucrose, melibiose, arabinose, cellobiose, dulcitol,
glycerol, alpha-methyl-D-glucoside, raffinose, salicin, xylose, mucate, erythritol and
adonitol.
(c) Costin Stoica
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Differential characters of the M. morganii subspecies and biotypes:
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