Two U.S. deaths reported in Michigan cyclosporiasis outbreak linked to contaminated lettuce

Michigan health officials confirmed on Monday the first two U.S. deaths linked to a multistate cyclosporiasis outbreak, bringing the state’s reported cases to 11,234 as of Aug. 3. The Michigan Department of Health and Human Services stated that both individuals had “significant underlying health conditions that may have been impacted by cyclospora and dehydration” .
The outbreak, caused by the parasite *Cyclospora*, has sickened thousands across the country, with federal authorities still investigating its origin. The U.S. Food and Drug Administration initially suspected contaminated iceberg lettuce from Taylor Farms, a Mexican supplier, which was served in Taco Bell restaurants. Taylor Farms, which produces 40% of bagged salads sold in the U.S., recalled products distributed in 27 states, including lettuce supplied to Taco Bell . The company later stated it no longer sources lettuce from the Mexican farm in question.
Michigan remains the hardest-hit state, with 193 hospitalizations reported alongside the 11,234 cases. Nationally, the Centers for Disease Control and Prevention recorded 6,707 confirmed cases across 45 states as of July 28, with an additional 11,500 suspected cases awaiting laboratory confirmation . The CDC noted that symptoms—including watery diarrhea, nausea, and fatigue—can persist for weeks or even months without treatment.
Health authorities have emphasized that cyclosporiasis is rarely fatal. The Michigan Health and Human Services Department reiterated that the two deaths involved patients with severe preexisting conditions, which may have been exacerbated by the infection and dehydration .
The outbreak has disrupted the fast-food industry, with Taco Bell removing lettuce from some menus last month after cases were linked to its restaurants. Customer visits to affected chains dropped by 19% following reports of the contamination, according to industry data . Sweetgreen and Yum! Brands, Taco Bell’s parent company, saw stock declines of up to 5.7% and 1.8%, respectively, amid the fallout .
Investigations by the FDA and CDC continue, as officials have not yet confirmed a single source for all cases. While contaminated lettuce remains the leading suspect, authorities have not ruled out other potential vectors .
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