| Genus Shimwellia |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacterales, Family Enterobacteriaceae, Genus Shimwellia,
- Shimwellia blattae Priest and Barker 2010, basonym: Escherichia blattae Burgess et al. 1973;
- Shimwellia pseudoproteus Priest and Barker 2010 - type species of the genus, synonym: Obesumbacterium proteus biogroup 2.
- Shimwellia blattae Priest and Barker 2010, basonym: Escherichia blattae Burgess et al. 1973;
- Shimwellia pseudoproteus Priest and Barker 2010 - type species of the genus, synonym: Obesumbacterium proteus biogroup 2.
Gram-negative, straight, nonmotile, nonspore-forming bacilli. S. blattae becomes
motile after incubation of more than 2 days.
motile after incubation of more than 2 days.
Colonies are smooth, small, circular, entire, entire margins, 1.0–1.5 to 5 mm
diameter. Aerobic, facultatively anaerobic. Mesophilic with optimum growth
temperature 30-37 ºC.
Media: Nutrient agar or nutrient broth, Trypticase Soy Agar ± 5% sheep blood.
diameter. Aerobic, facultatively anaerobic. Mesophilic with optimum growth
temperature 30-37 ºC.
Media: Nutrient agar or nutrient broth, Trypticase Soy Agar ± 5% sheep blood.
Shimwellia (Escherichia) blattae was isolated from the cockroach intestine and do not seem to have been isolated from other sources.
Shimwellia pseudoproteus was solated from brewery fermentors.
Shimwellia pseudoproteus was solated from brewery fermentors.
Shimwellia blattae has not been associated with disease either in humans or in cockroaches.
Shimwellia pseudoproteus is a contaminant of brewing yeasts.
Shimwellia pseudoproteus is a contaminant of brewing yeasts.
- 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. - Fergus G. Priest andMargaret Barker. Gram-negative bacteria associated with brewery yeasts: reclassification of
Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to
Shimwellia blattae comb. nov. Int J Syst Evol Microbiol April 2010 60:828-833. - 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, lysine decarboxylase, ornithine decarboxylase, nitrate
reduction and acid production from glucose.
Negative results for oxidase, ONPG, arginine dihydrolase, indole production. H2S production, urease, Voges-Proskauer reaction,
phenilalanine, gelatinase, growth on KCN media, esculin hydrolysis, DN-ase, lipase, acid production from: adonitol, lactose,
mannitol, inositol, D-sorbitol, sucrose, melibiose, cellobiose, dulcitol, alpha-methyl-D-glucoside, raffinose and salicin.
reduction and acid production from glucose.
Negative results for oxidase, ONPG, arginine dihydrolase, indole production. H2S production, urease, Voges-Proskauer reaction,
phenilalanine, gelatinase, growth on KCN media, esculin hydrolysis, DN-ase, lipase, acid production from: adonitol, lactose,
mannitol, inositol, D-sorbitol, sucrose, melibiose, cellobiose, dulcitol, alpha-methyl-D-glucoside, raffinose and salicin.
(c) Costin Stoica
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Differential characters of the species:
Legend: + positive 90-100%, - negative 90-100%, [+] positive 75-89%, [-] negative 75-89%, d positive 25-74% of strains
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