The United States Food and Drug Administration issued multiple advisories on Wednesday for oysters and clams that they declare could be contaminated with norovirus, a solemn gastrointestinal illness.

The recalled oysters originated from British Columbia, Canada, with a recall first being issued in California.

“Consumers should not eat these potentially contaminated oysters. Consumers who have symptoms should contact their health worry provider to update their symptoms and receive worry,” the FDA said in a press release.

Another recall was also issued by the FDA affecting oysters from Washington state and Manila clams. The administration says these recalled seafood products could be contaminated with the norovirus.

Here is what we recognize about the ongoing recall.

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Canadian oysters

A recall dated Dec. 13 issued by S&M Shellfish Co. from San Francisco said impacted products were sold under the brands Fanny Bay, Buckley Bay and Royal Miyagi Oysters.

The recall says these oysters were harvested in British Columbia between Dec. 1-9 by the corporation Pacific Northwest Shellfish and Union Bay Seafood. 

An expanded recall issued by the FDA affects oysters sold to restaurants and food retailers in Arizona, California, Colorado, the District of Columbia, Florida, Georgia, Hawaii, Illinois, Kentucky, Missouri, Nevada, recent Jersey, recent York, North Carolina and Pennsylvania.

Manila clams and Washington state oysters

Similarly, a recall was issued in Washington state on Dec. 12 for oysters and clams shipped within Washington state and California. The FDA expanded the initial Washington recall to include restaurants and food stores in Arizona, California, Florida, Massachusetts, Michigan and recent York. 

According to the FDA, the recalled oysters and clams from Washington state were harvested by Rudy’s Shellfish between Nov. 15 and Dec. 11.

“The FDA is awaiting further information on the distribution of these oysters and Manila clams and will continue to monitor the investigation and provide assistance to state authorities as needed,” the FDA said.

What are the symptoms of norovirus?

According to the FDA, food contaminated by the norovirus could look, smell and taste normal. The administration says that symptoms of the virus could include diarrhea, abdominal cramps, nausea, vomiting, or fever after eating affected oysters.

Fernando Cervantes Jr. is a trending information reporter for USA TODAY. Reach him at [email protected] and pursue him on X @fern_cerv_.