CDC reports more than 4,100 cyclosporiasis cases in 41 states

Michigan accounts for 6,500 of more than 8,000 cases

The CDC’s Wednesday update reported more than 4,100 confirmed cyclosporiasis infections in 41 states, more than double the case count the agency reported a week earlier. The total includes 308 hospitalizations, with no deaths reported. The confirmed cases alone have already surpassed the 3,955 cyclosporiasis cases reported in all of 2025.

State health departments in six states — Michigan, Ohio, Indiana, Kentucky, West Virginia and New York — have collectively reported more than 8,000 cases this summer. Michigan reported the highest number of cases, with 6,500 reported cases, according to state health departments.

The CDC said it assumes a six-week lag between illness onset and case reporting, and that case counts will continue to rise as data arrives. The agency noted the true number of people sickened is likely higher than reported, since some people recover without seeking medical care and are not tested. The CDC’s count of confirmed cases does not include more than 7,000 additional suspected cases — most in Michigan and Ohio — that have not yet been confirmed by a laboratory, a figure about 45% higher than the previous count of suspected cases.

HHS Secretary Robert F. Kennedy Jr. said Tuesday the outbreak is “under control” despite the rising case numbers. “We do have the outbreak under control,” Kennedy told ABC News. “We have done extensive forensics, epidemiological forensics, and we’ve identified the source of the outbreak. We and the companies that are involved have implemented a recall.”

The FDA traced the outbreak to shredded iceberg lettuce supplied by Taylor Farms and sourced from central Mexico. Taylor Farms de Mexico issued a voluntary recall of all iceberg lettuce from central Mexico. The FDA reported over the weekend that a sample of shredded iceberg lettuce from Taylor Farms — not part of the recall — had tested positive for the Cyclospora parasite, but the agency later determined the result was a false positive. Acting FDA Commissioner Kyle Diamantas said Monday the false positive did not change the FDA’s epidemiological finding linking cases to Taylor Farms shredded lettuce.

The illness is caused by the Cyclospora cayetanensis parasite and spreads through food or water contaminated by feces from an infected person. Symptoms include sudden, watery diarrhea, vomiting, nausea, severe stomach cramps, loss of appetite and fatigue. It can take up to two weeks after consuming contaminated food for symptoms to appear.