approximately a dozen individuals have admitted becoming vomiting after ordering the oysters consumed in a restaurant in chattanooga , tennessee . the cincinnati - mercer county health department and tn department of health confirmed that the patients were treated with norovirus . norovirus is a foodborne pathogen that can cause early gastroenteritis in patients . the symptoms of norovirus illness begin suddenly , most often in 24 to 48 hours after inhalation of the viral , but they can resolve as early as 12 months after exposure . the intestine features included nausea , fatigue , diarrhea , and some stomach cramping .
Oysters have been linked to gastrointestinal diseases caused by a virus.