Bacteria found mostly in meat (particularly beef) or produce contaminated with feces harboring the bacteria, and in unpasteurized (raw) milk and untreated water too. The most common form is E. coli 0157:H7—the rest of the group of E. coli bacteria are mostly harmless.
Charges: Causing people to double over with diarrhea (often bloody), severe stomach cramps and vomiting. May also cause a low fever or pneumonia. Symptoms show up within two to five days of eating the contaminated food and most infections are mild, but about 5 to 10 percent of people develop hemolytic uremic syndrome (HUS), a life-threatening condition characterized by anemia, acute renal failure and low platelet count.