approximately a dozen patients have reported becoming ill after consume raw oysters consumed in a restaurant in chattanooga , tennessee . the chattanooga - clark local health department and tennessee departments of safety confirmed that the patients were infected with norovirus . norovirus is a foodborne pathogen that can cause mild gastroenteritis in humans . the events of norovirus symptoms begin slowly , most usually in 24 to 48 nights after inhalation of the virus , but they can begin as early as 12 hours after exposure . the bowel consequences include confusion , vomiting , malnutrition , and some stomach cramping .
Oysters have been linked to gastrointestinal diseases caused by a virus.