A 2003 California regulation restricting sales of raw oysters from the Gulf of Mexico appears to have nearly eliminated Vibrio vulnificus infections in the state.
Before the regulation took effect, California had tried for more than a decade to decrease V vulnificus illnesses and deaths linked with oysters. In 1991, the state required restaurants and other food establishments that sold or served raw Gulf Coast oysters to post written warnings that the shellfish can cause severe illness and death.
Vibrio Infections Down After California Restricts Oyster Sales. JAMA. 2013;310(11):1115. doi:10.1001/jama.2013.276926