More than 400 people have fallen ill in a cyclosporiasis outbreak spanning Michigan, Ohio, West Virginia, and Kentucky. The U.S. Centers for Disease Control and Prevention is investigating the source with state and federal partners but has not yet identified a contaminated food.
The CDC reported the figure as of July 13. Cases involve people who became sick on or after June 22, 2026. Officials noted that the true number of illnesses is likely higher because some people recover without medical care or testing.
Investigators are interviewing patients about foods consumed in the two weeks before symptoms began. No specific food has been confirmed as the source. Additional clusters are under review in other parts of the country.
Cyclosporiasis is caused by a parasite and is not usually life threatening. Symptoms typically appear about one week after infection and can last weeks without treatment. Health officials urge anyone with symptoms to contact a provider.
The CDC and FDA continue to collect data from patients and review information with state agencies to trace the outbreak.
