Oysters from British Columbia linked to multi-state norovirus outbreak

MDH logo

Partnership and Workforce Development – Food Safety Partnership Update

View this as a webpage

View past Updates via RSS Feed

April 5, 2022

Oysters from British Columbia linked to multi-state norovirus outbreak

Health officials are warning restaurants and retailers not to serve or sell raw oysters harvested from a specific bay in British Columbia, Canada, after linking norovirus illnesses to these oysters. Consumers should not eat these potentially contaminated raw oysters.

The Minnesota Department of Health, Hennepin County Public Health, and the Minnesota Department of Agriculture are working with federal officials and public health agencies in other states and Canada to investigate a norovirus outbreak linked to raw oysters from British Columbia, Canada. The U. S. Food and Drug Administration (FDA) has confirmed that potentially contaminated raw oysters harvested in the south and central parts of Baynes Sound, British Columbia, Canada, were distributed to restaurants and retailers in 13 states, including Minnesota.

Check shellstock tags

While some parts of the harvest area have been closed, it is likely that oysters from this area are still in the marketplace. With that in mind, officials are urging restaurants and distributors to check shellstock tags and discard oysters from this harvest area.

Consumers can ask oyster suppliers or restaurants to check the shellstock tag for the harvest location. Norovirus and other pathogens found in raw oysters can be destroyed by cooking to 145 degrees Fahrenheit before eating.

Norovirus

Symptoms of norovirus typically include nausea, vomiting, diarrhea, or stomach cramps that begin 12 to 48 hours after ingestion of the virus. There is currently a high level of norovirus illness activity in Minnesota, and most is not associated with eating oysters.

“People with norovirus can spread it to others even after symptoms stop,” MDH Epidemiologist Supervisor Senior Carlota Medus said. “The best way to limit spread is to wash your hands well with soap and water after using the bathroom and before preparing food for others.”

Oysters can cause illness if eaten raw, particularly in people with compromised immune systems. Food contaminated with norovirus may look, smell, and taste normal.

For more information...