http://en.wikipedia.org/wiki/Escherichia_coli
E. coli and other facultative anaerobes constitute about 0.1% of gut flora,and fecal–oral transmission is the major route through which pathogenic strains of the bacterium cause disease. Cells are able to survive outside the body for a limited amount of time, which makes them ideal indicator organisms to test environmental samples for fecal contamination.There is, however, a growing body of research that has examined environmentally persistent E. coli which can survive for extended periods outside of the host.
E. coli and other facultative anaerobes constitute about 0.1% of gut flora,and fecal–oral transmission is the major route through which pathogenic strains of the bacterium cause disease. Cells are able to survive outside the body for a limited amount of time, which makes them ideal indicator organisms to test environmental samples for fecal contamination.There is, however, a growing body of research that has examined environmentally persistent E. coli which can survive for extended periods outside of the host.
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