Search results
Results From The WOW.Com Content Network
E. coli is the type species of the genus (Escherichia) and in turn Escherichia is the type genus of the family Enterobacteriaceae, where the family name does not stem from the genus Enterobacter + "i" (sic.) + "aceae", but from "enterobacterium" + "aceae" (enterobacterium being not a genus, but an alternative trivial name to enteric bacterium).
These bacteria are found in all environments that support life on Earth. Within this category, notable species include the model organism Escherichia coli , along with various pathogenic bacteria , such as Pseudomonas aeruginosa , Chlamydia trachomatis , and Yersinia pestis .
Escherichia (/ ˌ ɛ ʃ ə ˈ r ɪ k i ə / ESH-ə-RIK-ee-ə) is a genus of Gram-negative, non-spore-forming, facultatively anaerobic, rod-shaped bacteria from the family Enterobacteriaceae. [3] In those species which are inhabitants of the gastrointestinal tracts of warm-blooded animals, Escherichia species provide a portion of the microbially ...
Escherichia coli have an incubation period of 12–72 hours with the optimal growth temperature being 37 °C. Unlike the general coliform group, E. coli are almost exclusively of fecal origin and their presence is thus an effective confirmation of fecal contamination. Most strains of E. coli are harmless, but some can cause serious illness in ...
Other characteristics of E. coli are that it is oxidase-negative, citrate-negative, methyl-red positive, and Voges-Proskauer-negative. To sum up E. coli, it is a coliform. It is able to use glucose and acetate as a carbon source for fermentation. E. coli is commonly found in the gut of living organisms. [15]
E. coli lives on the surface of the meat, so when it’s ground up, it gets distributed throughout the meat. If the meat is not ground up, the cooking process will kill any bacteria on the outside ...
The body is continually exposed to many species of bacteria, including beneficial commensals, which grow on the skin and mucous membranes, and saprophytes, which grow mainly in the soil and in decaying matter. The blood and tissue fluids contain nutrients sufficient to sustain the growth of many bacteria.
The fimbriae is assembled by a chaperone-usher system, and proteins required for the assembly are expressed by the Pap operon, which is located on pathogenicity islands. The genes of the Pap operon encode five structural proteins (PapA, PapK, PapE, PapF and PapG), four proteins involved in the transport and assembly (PapD, PapH, PapC, PapJ) and ...