Health officials in the United States announced on Monday that two fatalities in Michigan are associated with the ongoing Cyclospora outbreak. These deaths represent the first known cases connected to a severe diarrhea outbreak affecting multiple states, as reported by CNN.
The Michigan Department of Health and Human Services stated, “Two deaths have been identified in the Cyclospora outbreak affecting Michigan. Medical records indicate that both individuals had severe pre-existing medical conditions, which may have been exacerbated by Cyclospora infection and dehydration. No further information regarding these cases will be provided.”
While Cyclospora infections are generally not life-threatening, the department clarified that such fatalities are rare. In total, Michigan has reported 11,234 cases of Cyclospora, with 193 individuals hospitalized.
The Centers for Disease Control and Prevention (CDC) acknowledged in a statement on its website that it is aware of the two deaths linked to Cyclospora among individuals with preexisting health conditions in the context of this outbreak.
Cyclospora is caused by the microscopic parasite Cyclospora cayetanensis, which can contaminate fresh food and water, leading to severe diarrhea in infected individuals. Some Cyclospora infections may resolve spontaneously; however, without treatment, symptoms may persist for a month or longer, and persistent diarrhea can complicate hydration maintenance. Dehydration from frequent diarrhea can lead to serious health issues.
The incidence of Cyclospora typically rises during the spring and summer months in the U.S., with the season usually lasting from early May to late August, according to the CDC. However, this year, the number of cases is particularly high.
The CDC has identified over 18,000 Cyclospora cases across the U.S. this season, with 6,707 confirmed cases and approximately 11,500 cases undergoing further testing to determine if the illness was contracted domestically.
In 2026, the U.S. Food and Drug Administration (FDA), in collaboration with the CDC and state partners, is investigating multiple Cyclospora outbreak cases, including a particularly extensive outbreak affecting several states centered in the Midwest.
Iceberg lettuce supplied by Taylor Farms has been recalled, with authorities indicating that contaminated products may have already been consumed or removed from store shelves.
