The Centers for Disease Control and Prevention reported 15,716 laboratory-confirmed cases of cyclosporiasis acquired in the United States since May 1. This figure marks a substantial increase from the 1,180 cases reported during the same period last year.

The latest update covers data through August 17 and spans 47 states. At least 11,841 additional cases require further investigation. Officials have linked many infections to contaminated produce, including a large multistate outbreak tied to iceberg lettuce imported from central Mexico.

Cyclosporiasis is caused by the Cyclospora cayetanensis parasite and typically produces prolonged watery diarrhea, fatigue, and abdominal cramps. Symptoms can persist for weeks without treatment. The illness spreads through food or water contaminated with human feces.

Health authorities noted 828 hospitalizations connected to the confirmed cases, along with two deaths. No widespread fatalities have occurred. The true number of infections is likely higher because many people recover without seeking medical care or testing.

CDC, FDA, and state partners continue investigating multiple clusters. Traceback efforts focus on imported fresh produce as a primary source. Public health messaging emphasizes thorough washing of fruits and vegetables and prompt medical attention for persistent symptoms during peak season.

Surveillance data shows cases concentrated in certain regions, with Michigan reporting the highest totals. The outbreak has prompted recalls and supply chain reviews for affected products.