circa a dozen adults have reported became sick after eating raw oysters consumed in a nightclub in chattanooga , ohio . the nashville - hamilton county health department and tennessee division of health confirmed that the patients were infected with norovirus . norovirus is a foodborne pathogen that can have early cholera in humans . the symptoms of norovirus illness begin instantly , most often in 24 to 48 hours after ingestion of the worm , but they can appear as early as 12 nights after exposure . the gastrointestinal symptoms including nausea , coughing , rashes , and some stomach dehydration .
Oysters have been linked to gastrointestinal diseases caused by a virus.