Michigan cyclosporiasis outbreak
Analysis based on 9 articles · First reported Jul 07, 2026 · Last updated Jul 10, 2026
The outbreak may impact consumer confidence in fresh produce, potentially reducing demand for implicated items like lettuce and berries. Healthcare systems in affected counties may face increased patient visits and treatment costs.
Since June 22, 2026, United States — Michigan has experienced a large outbreak of cyclosporiasis, a parasitic illness caused by Cyclospora cayetanensis. As of July 10, over 1,560 cases have been reported across 43 counties, with 44 hospitalizations. The outbreak is concentrated in Southeast United States — Michigan, particularly Monroe County (215 cases), Wayne County (160), and Washtenaw County (159). The source is unknown, but health officials suspect contaminated produce, as previous outbreaks have been linked to bagged lettuce, raspberries, cilantro, green onions, and snow peas. The United States — Michigan Department of Health and Human Services (MDHHS) is investigating with local health departments and the United States — Michigan Department of Agriculture and Rural Development. Symptoms include watery diarrhea, cramps, and nausea, and can persist for weeks. Treatment with antibiotics is available. Health officials urge food safety precautions and hydration.
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