Escherichia -...

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Escherichia—E. coli  is a major member of the enteric group. It is also the most studied and  familiar bacterial species used in biological research. Tests to detect its presence in water or food  are important because this is considered an indication of fecal contamination. Although regular  strains of  E. coli  are normal and harmless in the intestinal tract, there are exceptions: Regular strains cause many urinary tract infections—they are OK in the intestines  but pathogenic in other locations Certain strains produce enterotoxins, which cause travelers' diarrhea One specific strain,  E. coli  O157:H7 produces a toxin which causes a severe or  fatal foodborne disease   Salmonella —these enterics are not normal flora, and their presence in the intestinal tract of  humans is not considered normal. Animals, especially poultry and cattle, frequently do carry 
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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