Cyclospora Outbreak Is Ending, Here's What That Means for Unresolved Cases
Summary
Federal officials are about to declare the end of the largest known Cyclospora outbreak in the U.S., which has sickened over 19,500 people since May 2026. The outbreak was mainly linked to shredded iceberg lettuce processed by Taylor Farms de Mexico, but many details about the source and other related cases remain unknown.Key Facts
- The Cyclospora outbreak began in May 2026 and is the largest in U.S. history, surpassing a previous outbreak in 2019 with 4,700 cases.
- Over 19,500 laboratory-confirmed cases have been reported, though actual illnesses are likely higher since many people do not get tested.
- The outbreak caused hundreds of hospitalizations and at least two deaths in Michigan.
- Most cases were traced to shredded iceberg lettuce from Taylor Farms de Mexico, which was supplied to major restaurant chains including Taco Bell.
- Investigators never found a Cyclospora-positive lettuce sample, making it hard to pinpoint the exact contamination source.
- Cyclospora is a tiny parasite that causes a stomach illness with symptoms like severe diarrhea.
- Other outbreaks and thousands of cases not linked to the lettuce cluster are still under investigation, with many sources remaining unidentified.
- Officials emphasize ongoing monitoring of disease threats even as this outbreak ends.
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