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Escherichia coli is one of the most important model organisms, and its genetics and biochemistry have been closely studied. Some enterobacteria are important pathogens, e.g. Salmonella, or Shigella e.g. because they produce endotoxins. Endotoxins reside in the cell wall and are released when the cell dies and the cell wall disintegrates.
Some of the most common bugs that contaminate food include E. coli, salmonella, campylobacter, staphylococcus, listeria and norovirus. Though most any food can become contaminated with bacteria or ...
Salmonella was named after Daniel Elmer Salmon (1850–1914), an American veterinary surgeon. Salmonella species are non-spore-forming, predominantly motile enterobacteria with cell diameters between about 0.7 and 1.5 μm, lengths from 2 to 5 μm, and peritrichous flagella (all around the cell body, allowing them to move). [5]
Coliform bacteria include genera that originate in feces (e.g. Escherichia, Enterobacter, Klebsiella, Citrobacter). The fecal coliform assay is intended to be an indicator of fecal contamination; more specifically of E. coli which is an indicator microorganism for other pathogens that may be present in feces.
One way E. coli is spread is when feces contaminate food and water. Since animals can potentially carry pathogenic E. coli, touching animals, such as at a petting zoo, can potentially put you at risk.
But there are different strains of E. coli, and some can be potentially dangerous. This recall involves one of those types. Referred to as E. coli O157:H7 or Shiga toxin-producing E. coli (STEC ...
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 ...
E. coli, listeria and salmonella have collectively sickened hundreds of people across the U.S.