Cyclosporiasis in Michigan: List of foods linked to some outbreaks

Key Points:

• Michigan has reported a significant increase in cyclosporiasis cases, rising from 170 on June 30 to 572 by the weekend, with the highest numbers in Monroe, Lenawee, Washtenaw, Wayne, Shiawassee, Jackson, Oakland, and Livingston counties.
• No specific produce grower, supplier, or produce type has been identified as the source of the outbreak in southeast Michigan as of July 4, 2026, but officials have highlighted foods previously linked to Cyclospora outbreaks, including bagged salad mixes, fresh cilantro, basil, raspberries, snow peas, and green onions.
• To reduce the risk of infection, health officials recommend thoroughly washing or cooking these high-risk raw foods, avoiding prewashed bagged salads, and considering frozen raspberries as an alternative, although freezing does not guarantee parasite elimination.
• Cyclosporiasis is caused by the parasite Cyclospora cayetanensis, typically transmitted through contaminated food or water, leading to symptoms such as watery diarrhea, abdominal cramps, nausea, and low-grade fever, with symptoms appearing 2 to 14 days after exposure.
• Treatment involves antibiotics, and individuals experiencing sudden or ongoing diarrhea are advised to seek medical attention promptly to manage symptoms and prevent prolonged illness.