approximately a dozen people have reported becoming sick after eating raw clams consumed in a restaurant in hamilton , tennessee . the tennessee - jackson district education department and tennessee state of health confirmed that the patients were infected with norovirus . norovirus is a foodborne pathogen that can cause acute typhoid in humans . the causes of norovirus illnesses appear suddenly , most recently in 24 to 48 times after ingesting of the oyster , but they can manifest as early as 12 hours after exposure . the gastrointestinal symptoms encompass nausea , vomiting , diarrhea , and some stomach cramping .
Oysters have been linked to gastrointestinal diseases caused by a virus.