Ohio reports 4,013 cyclosporiasis cases in lettuce parasite outbreak
Cleveland
Last updated: August 5, 2026
Ohio is currently experiencing a significant outbreak of cyclosporiasis, with over 4,000 cases reported. The majority of these cases are linked to the consumption of contaminated lettuce.
- The Ohio Department of Health (ODH) has confirmed 4,013 cases of cyclosporiasis across the state as of the latest report. This figure includes 13 new cases added in the past week, indicating the ongoing nature of the outbreak. Northern Ohio counties have consistently reported the highest number of infections, suggesting a localized source or distribution pattern. Cyclosporiasis is a diarrheal illness caused by the parasite *Cyclospora cayetanensis*. The ODH advises residents to practice good hand hygiene and to thoroughly wash produce before consumption. While the specific brand or source of the contaminated lettuce has not been publicly identified by the ODH, the widespread nature of the outbreak points to a common contaminated product. Further investigations are underway to pinpoint the exact origin of the contamination and prevent future occurrences. The state is working with federal agencies to monitor the situation and provide guidance to the public.
