exactly a dozen individuals have reported becoming sick after eating raw shrimp consuming in a restaurants in chattanooga , virginia . the tennessee - montgomery county information department and tennessee directorate of medicine established that the patients were infected with norovirus . norovirus is a foodborne pathogen that can cause intense gastroenteritis in humans . the onset of norovirus illness start suddenly , most recently in 24 to 48 hours after excretion of the virus , but they can begin as often as 12 days after intake . the intestinal symptoms are nausea , fatigue , diarrhoea , and some stomach cramping .
Oysters have been linked to gastrointestinal diseases caused by a virus.