The Public Health Agency of Canada says raw BC oysters have been linked to hundreds of cases of norovirus in BC, Alberta, Saskatchewan and Ontario.
The agency issued a public health advisory saying 279 cases of norovirus and gastrointestinal illnesses have been identified among people who ate raw oysters between mid-January and the end of March.
There have been no deaths and most cases have been in British Columbia, but the agency says 15 illnesses have been reported in Ontario and there was one in Alberta and Saskatchewan.
The agency says one food recall was issued in February, while three more were issued last month for oysters from the Deep Bay and Union Bay areas off the east of the island. of Vancouver and that the investigation could lead to the recall of other products.
Brands of oysters from shellfish companies Taylor, Stellar Bay and Pacific Rim are affected by the recalls, and agency details show the oysters were sold in British Columbia, the Yukon, the three prairie provinces , Ontario and Quebec.
Health officials say norovirus symptoms can include diarrhea, vomiting, nausea and stomach cramps, and customers with recalled oysters should throw them away or return them to the place of purchase.