Overview
- The CDC reported Tuesday that 1,645 Cyclospora cases have been confirmed since May 1 and that more than 5,100 additional reports are under review, while state tallies—especially Michigan’s—show several thousand local illnesses.
- Michigan health officials interviewed more than 1,000 patients and say lettuce and leafy salad greens repeatedly appear in food histories, but no specific product, grower or distributor has been identified.
- Federal and state teams from the CDC and FDA are running multiple parallel epidemiologic and supply‑chain investigations, and some restaurants have voluntarily removed fresh ingredients as a precaution while probes continue.
- Cyclospora is a food‑ and waterborne parasite that typically causes watery, sometimes intense diarrhoea about a week after exposure; roughly one in ten reported cases required hospitalization and no deaths have been reported.
- Public‑health experts warn case counts are uncertain because Cyclospora reporting was made optional in July 2025 and the parasite’s delayed environmental maturation and genetic complexity make traceback and final source confirmation difficult.