Food and Drug Administration officials are investigating a salmonella outbreak that has been linked to raw tuna. The deadly bacteria has thus far sickened 53 people in nine states.
The California Department of Public Health reported 31 cases as of late Thursday. Other states reporting incidents include Arizona, Illinois, Mississippi, New Mexico, South Dakota, Virginia, Washington and Wisconsin.
So far ten people have been hospitalized in serious condition but no deaths have thus far been reported.
The precise source of the outbreak is still being determined but most people who fell ill reported eating sushi containing raw tuna.
Salmonella is the most common source of food poisoning in the U.S. It is a bacteria that causes diarrhea, cramping and fever. If untreated it can lead to death, especially in those who are already weak.
The FDA advises that the elderly, young children, pregnant women and people with weakened immune systems should not consume raw fish or raw shellfish.