An estimated 181,000 cases occur annually in the USA with no known deaths. Outbreaks have been caused by oysters contaminated by sewage dumped overboard by oyster harvesters and recreational boaters. Consumers make mistakes preparing food at home that increases the risk of foodborne illness. Foodborne illnesses have also been traced to commercial food establishments. Many food establishments do not know that the pooling and undercooking of eggs can increase the risk of Salmonella enteritidis .
Institutional environments increase the risk of foodboren infection.