U.S. health officials have issued a warning that a salmonella outbreak affecting 13 people across seven states was linked to raw, frozen tuna supplied by Jensen Tuna. Two of the sickened people were hospitalized due to their illnesses.

Louisiana-based Jensen Tuna voluntarily recalled packages of the frozen ground fish that may be contaminated with the bacteria that causes symptoms including diarrhea, fever, and stomach cramps. Symptoms typically appear within 12 to 72 hours after eating contaminated food.

Illnesses connected to the fish were reported between Jan. 8 to March 20, according to the U.S. Centers for Disease Control.

The company sold the frozen ground tuna fish packaged in one-pound bags and 20-pound boxes to wholesalers in Connecticut, Iowa, Illinois, Minnesota, North Dakota, New York, and Washington under lot numbers z266, z271, and z272, according to the U.S. Food and Drug Administration.



"Jensen Tuna distributed product to all the states where ill people were reported, but recalled product might have been redistributed to additional states," the CDC warned in a press release.

Jensen Tuna imported the ground fish from JK Fish of Vietnam.



What should restaurants do?

Restaurants and retailers are advised to check with their suppliers to make sure they haven't purchased the possibly contaminated fish.

"If restaurants and retailers do not know if the frozen ground tuna they have is recalled, contact the distributor," the CDC said. "When in doubt, don't sell or serve it."

What about consumers?

Before consuming sushi made with raw tuna or "spicy tuna," consumers should ask the restaurant or grocery store if the fish was supplied by Jensen Tuna.

"If you are not sure if the tuna has been recalled, do not eat it," the CDC advised.

What else?

There have been no deaths linked to the tuna reported. Most people recover from the illness in about four to seven days.

People who think they may have contracted salmonella after eating raw tuna should contact their health care provider.

The investigation is ongoing.