Michigan health officials and the CDC announced the first two US deaths linked to a cyclosporiasis outbreak between August 1 and 4, 2026 [1, 2]. Both deceased had significant underlying health conditions that may have been worsened by the intestinal parasite and dehydration, the Michigan Department of Health and Human Services said [3].
As of early August 2026, the outbreak has infected 11,234 people across Michigan and hospitalized 193 patients, according to state health data [1, 2]. Cyclosporiasis, caused by the parasite Cyclospora cayetanensis, leads to watery diarrhea and nausea which can last for weeks or months if untreated [1, 2]. The illness is generally rare and not normally life-threatening [3, 2].
Investigators have linked the widespread outbreak to contaminated lettuce or salad greens, including lettuce sourced from Mexico and served at Taco Bell locations across multiple states [1, 3]. In response, Taco Bell removed some lettuce products in July 2026 while Taylor Farms issued a recall of lettuce distributed in 27 states [1].
The outbreak has affected 45 states nationally, with Michigan one of the hardest hit [1]. The Michigan Department of Health and Human Services emphasized that the recent deaths involved individuals with pre-existing conditions that likely increased their vulnerability to complications from the infection and dehydration [3].
Health authorities continue monitoring the situation as investigations into the source of the contaminated produce remain ongoing. No new fatalities have been reported beyond the initial two deaths. Hospitals in Michigan remain vigilant for new severe cases amid the outbreak.
