Escherichia

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Escherichia
SEM micrograph of Escherichia coli bacteria.
Scientific classification
Kingdom: Bacteria
Phylum: Proteobacteria
Class: Gamma Proteobacteria
Order: Enterobacteriales
Family: Enterobacteriaceae
Genus: Escherichia
Castellani & Chalmers 1919
Species

E. adecarboxylata
E. albertii
E. blattae
E. coli
E. fergusonii
E. hermannii
E. vulneris

Escherichia is a genus of Gram-negative, non-spore forming, facultatively anaerobic, rod-shaped bacteria from the family Enterobacteriaceae.[1] Inhabitants of the gastrointestinal tracts of warm-blooded animals, Escherichia species provide a portion of the microbially-derived vitamin K for their host. Escherichia coli are the most numerous aerobic commensal inhabitants of the large intestine in humans.

Contents

[edit] Pathogenesis

While many Escherichia are harmless commensals, particular strains of some species are human pathogens,[2] and are known as the most common cause of urinary tract infections,[3] significant sources of gastrointestinal disease, ranging from simple diarrhea to dysentery-like conditions,[1] as well as a wide-range of other pathogenic states.[4] While E. coli is responsible for the vast majority of Escherichia-related pathogenesis, other members of the genus have also been implicated in human disease.[5],[6]

[edit] See also

[edit] References

  1. ^ a b Madigan M; Martinko J (editors). (2005). Brock Biology of Microorganisms, 11th ed., Prentice Hall. ISBN 0-13-144329-1. 
  2. ^ Guentzel MN (1996). Escherichia, Klebsiella, Enterobacter, Serratia, Citrobacter, and Proteus. In: Baron's Medical Microbiology (Baron S et al, eds.), 4th ed., Univ of Texas Medical Branch. (via NCBI Bookshelf) ISBN 0-9631172-1-1. 
  3. ^ Ronald A (2003). "The etiology of urinary tract infection: traditional and emerging pathogens". Dis Mon 49 (2): 71-82. PubMed. 
  4. ^ The Species of Escherichia other than E. coli. The Prokaryotes. Retrieved on May 5, 2006.
  5. ^ Pien FD, Shrum S, Swenson JM, Hill BC, Thornsberry C, Farmer JJ 3rd (1985). "Colonization of human wounds by Escherichia vulneris and Escherichia hermannii". J Clin Microbiol 22 (2): 283-5. PubMed. 
  6. ^ Chaudhury A, Nath G, Tikoo A, Sanyal SC (1999). "Enteropathogenicity and antimicrobial susceptibility of new Escherichia spp". J Diarrhoeal Dis Res 17 (2): 85-7. PubMed. 

[edit] External links

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