Two Michigan Residents Die as Cyclosporiasis Outbreak Spreads Across 45 States

Health officials in Michigan confirmed two deaths associated with the state’s cyclosporiasis outbreak, marking the first fatalities from the parasitic disease reported in the United States this year. The Michigan Department of Health and Human Services said both decedents had significant underlying health conditions that may have been worsened by the infection and dehydration, and noted that death from cyclosporiasis is uncommon in the country.

Cyclosporiasis, caused by the microscopic parasite Cyclospora cayatenensis, typically produces watery diarrhea and other gastrointestinal symptoms. While the illness is rarely life-threatening, it can be severe for young children, the elderly and individuals with weakened immune systems.

The outbreak, which has been documented in 45 states, is the largest on record for 2026. A nine-state cluster linked to certain lots of iceberg lettuce from Taylor Farms has resulted in about 2,000 confirmed cases, with Michigan alone reporting more than 11,500 cases and roughly 200 hospitalizations. Ohio follows with over 4,000 cases. Additional investigations are under way for at least three other active outbreaks, including one in North Carolina where officials suspect parsley or cilantro as possible sources.

Federal health authorities have confirmed over 6,700 cases nationwide, with another 11,000 pending verification. No further details about the Michigan deaths will be released.