Cyclosporiasis Outbreak Hits 47 States — 15,716 Cases, 2 Dead, Lettuce Recalled

The United States is experiencing its largest cyclosporiasis outbreak on record, with the CDC reporting 15,716 lab-confirmed cases across 47 states as of August 17, 2026. The outbreak has hospitalized 828 people and killed two. Federal health officials have linked 9,481 cases in 17 states to recalled iceberg lettuce from Taylor Farms de Mexico.

Michigan remains the epicenter. State health officials reported 13,909 cases, 314 hospitalizations, and both deaths as of August 13.

Cyclosporiasis is an intestinal infection caused by a parasite called Cyclospora cayetanensis. It spreads through contaminated food or water. For related coverage on how America's food supply is under pressure, read our report on food safety recalls across the country.

What Is Cyclosporiasis

Cyclosporiasis is caused by a single-celled parasite that contaminates produce and water. Unlike bacteria, it is not killed by routine washing. Only heating food to at least 158 degrees destroys it.

Lynette Johnston, assistant professor at NC State University, explained: "Cyclospora is not a bacteria. Many of our foodborne illnesses we think of them as bacteria. We can handle them in a little bit different way. Their control and prevention are certainly different."

Federal investigators traced the outbreak to iceberg lettuce grown in central Mexico by Taylor Farms. The recall was issued July 17, 2026.

For more on food systems and public health pressure, see our coverage of healthcare costs and public health infrastructure in America.

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