As of mid-Jun 2026, we have been experiencing an unusually large outbreak of cyclosporiasis, a gastrointestinal illness caused by the microscopic parasite Cyclospora cayetanensis. Cases have been reported across multiple states, with particularly high numbers in Ohio and neighboring Michigan. Health departments continue to search for the cause of the outbreak, but no specific food item or source has yet been identified.
Cyclosporiasis outbreaks are commonly associated with the contaminated water and fresh produce. The general route of produce contamination is through contaminated irrigation water or soil. Learn the facts about this foodborne illness and tips for prevention for growers and consumers:
Tips for GROWERS to reduce the risk of Cyclospora contamination on the farm
- Infographic for growers: Source of contamination infographic
Tips for CONSUMERS to lower the risk of cyclosporiasis
Tips for HEALTHCARE WORKERS AND FOODSERVICE OPERATIONS to lower the risk of cyclosporiasis