Bacteria are the most common cause of foodborne illness.
Bacteria are found everywhere in our environment. Most species of bacteria are beneficial or do not cause illness. It is estimated that the few bacteria that do cause foodborne illnesses are partially responsible for approximately 30 million cases of foodborne illness yearly, with a mortality rate of approximately 10,000 yearly. The common symptoms are nausea, vomiting, and dehydration. Fever may or may not be present.