There are hundreds of strains of E.coli , and most are harmless.
Infection often causes severe bloody diarrhea and stomach cramping with little or no fever.
Symptoms usually begin 2 to 5 days after exposure and lasts for approximately 5 to 10 days. Some people may only have mild diarrhea without blood OR may have no symptoms at all. This condition is very serious and can lead to kidney failure and death. Children under 5 and the elderly are more likely to develop this condition. An infected person can pass the bacteria in their stool for up to 2 weeks after their symptoms have stopped.