Consumption of contaminated foods or beverages causes foodborne or waterborne infections. Failure to control an identified (or unknown) threat causes foodborne and waterborne diseases. It is an unacceptable contamination in food and water that renders the food or water unfit for human consumption. "Food poisoning," which includes vomiting and diarrhoea, is a common symptom of food - borne illnesses. Depending on the microbes involved, waterborne infections can cause food poisoning or pneumonia. Untreated water or water contaminated with human or animal sewage are apparent sources of foodborne and waterborne infections. Foodborne infections are caused by contaminated foods at any point during the food preparation process. Before they reach the grocery store, certain meats are contaminated with E. coli bacteria; other items may be contaminated with Salmonella or the bacteria that causes cholera.