Cyclosporiasis

Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. People become infected by consuming contaminated food or water contaminated with the parasite. While fresh produce—including berries, leafy greens, cilantro, basil, and other herbs—has often been associated with Cyclospora infections, the source of the exposure occuring June/July 2026 has not yet been identified in this investigation.

For more information on symptoms, treatment, and FAQ’s, please see below.

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What to Know
How Does it Spread
Symptoms & Treatment
Prevention Tips
Food Prep Guide
Job Exclusions

Frequently Asked Questions

  1. Do we know what is causing the current outbreak? Not yet. This remains an active multi-state investigation involving state and federal public health partners. Investigators continue interviewing confirmed cases and reviewing food histories to identify any common exposures.Information will be shared publicly as it becomes available.
  2. Is this part of a larger outbreak? Yes. The increase in cases appears to be part of a larger regional outbreak affecting multiple areas.
  3. Do we know which produce is responsible? Not at this time. No single food item has been confirmed. Investigators continue evaluating all possible food sources.
  4. Should people stop eating fresh produce?No. Fresh fruits and vegetables remain an important part of a healthy diet. Continue eating fresh produce while carefully washing it before preparation or consumption.
  5. Are locally grown fruits and vegetables involved? At this time, investigators have not identified a specific source.All possible food sources remain under consideration.
  6. Are restaurants safe?Licensed food establishments are required to follow food safety regulations, including proper produce washing and safe food handling practices.The investigation is ongoing, and no specific restaurant or restaurant chain has been identified as the source.
  7. Is bagged salad or pre-cut produce more dangerous? There is currently no evidence that bagged salads or pre-cut produce are riskier than other fresh produce. However, these products have been linked to previous outbreaks. Recommendation is to buy whole heads or whole products and continue following food prep & safety recommendations.
  8. Should people continue shopping at farmers markets? Yes. Fresh produce from farmers markets can continue to be enjoyed. Wash produce thoroughly before eating or preparing it.
  9. Does washing produce completely eliminate the parasite? Washing produce helps reduce the risk of illness but may not completely eliminate microscopic parasites. Proper washing remains one of the most effective prevention measures currently available. Cooking to a proper temperature of 160 degrees Fahrenheit for produce will kill the parasite.
  10. Can cooking vegetables kill Cyclospora? Yes. Cooking foods to an internal temperature above 160°F (71°C) kills the parasite. Produce should still be washed before cooking.
  11. Does hand sanitizer kill Cyclospora? Soap and running water are recommended. Handwashing is more effective than alcohol-based hand sanitizer for reducing contamination associated with foodborne illness.
  12. How soon do symptoms appear? Most people become ill approximately one week after exposure, although symptoms may begin anywhere from 2 to 14 days afterward.
  13. When should someone seek medical care? Individuals should contact their healthcare provider if they experience: Frequent watery diarrhea, Symptoms lasting more than a couple of days, Signs of dehydration, Severe abdominal pain, Persistent illness after travel or eating fresh produce. Healthcare providers can determine whether stool testing is appropriate and prescribe treatment if needed.
  14. How is cyclosporiasis diagnosed? Diagnosis requires laboratory testing of a stool specimen ordered by a healthcare provider.



Lucas County Health Department – Cyclosporiasis page and local case count Ohio Department of Health CDC Cyclosporiasis