US reports first two deaths linked to diarrhea-causing parasite outbreak

Michigan has reported the first two confirmed deaths in the United States linked to an ongoing outbreak of cyclosporiasis, an intestinal illness caused by the *Cyclospora* parasite. State health officials announced on Monday, August 3, 2026, that both individuals had significant underlying health conditions which may have been exacerbated by the parasitic infection and resulting dehydration.

This microscopic parasite, *Cyclospora*, is typically transmitted through contaminated food or water, often by produce exposed to human feces. Symptoms of cyclosporiasis commonly include severe, watery diarrhea. While the illness is usually not life-threatening, this development underscores the potential for serious complications in vulnerable individuals.

The current outbreak has affected thousands across the U.S., with Michigan alone reporting over 11,000 cases. Federal health officials have identified iceberg lettuce from Mexico, served at Taco Bell restaurants in several states, as a source for many infections, leading to a voluntary recall on July 17, 2026. Investigations into other potential sources for the widespread illness are still ongoing.