 The most common symptoms of E. coli include diarrhea, bloody diarrhea, abdominal pain, nausea and vomiting.Proper storage, sanitary tools and work spaces, heating and cooling properly and to adequate temperatures, and avoiding contact with other uncooked foods can greatly reduce the chances of contamination.Tightly sealed water and air proof containers are good measures to limit the chances of both physical and biological contamination during storage.