What agents of acute diarrhea are most likely to be acquired from ingestion of raw oysters?
Oysters and other filter-feeding organisms, whether farmed or harvested from natural environments, are able to harbor and concentrate enteric pathogens. Both viral and bacterial enteric infections may be acquired by the ingestion of raw oysters. Common pathogens of concern include Vibrio species, in particular Vibrio parahaemolyticus , which causes a diarrheal illness. Norovirus outbreaks have also been attributed to raw oyster consumption. Vibrio vulnificus infection has been associated with these ingestions but is more associated with causing septicemia and bullous necrotizing fasciitis in immunocompromised patients and those with end-stage liver disease or cirrhosis.