US faces largest cyclosporiasis outbreak on record with over 11,500 cases
The United States is experiencing an unprecedented cyclosporiasis outbreak in 2026. Since May first, more than 4,100 laboratory-confirmed cases have been reported across 41 states, with another 7,400 cases under investigation, totaling over 11,500 suspected or confirmed illnesses. This far exceeds typical yearly case numbers. Cyclosporiasis is caused by a microscopic parasite transmitted through contaminated food and water. The main symptoms are severe, watery diarrhea lasting weeks, loss of appetite, and weight loss. Three hundred eight hospitalizations have been reported with no deaths. A major cluster of at least 1,644 cases across five Midwestern states has been linked to shredded iceberg lettuce supplied by Taylor Farms to Taco Bell and other retailers. The source remains partially unconfirmed due to a false positive lab result. Health officials continue investigating multiple outbreak clusters and are working to identify additional sources affecting the remaining states.
Key facts
- Since May 1, 2026, more than 4,100 laboratory-confirmed cases and 7,400 additional suspected cases reported across 41 states
- 308 hospitalizations confirmed with zero deaths reported
- 1,644 cases linked to outbreak centered in Indiana, Kentucky, Michigan, Ohio, and West Virginia
- Outbreak linked to shredded iceberg lettuce supplied by Taylor Farms from central Mexico
- Cases exceed 249 reported during same period in 2025 by more than 16-fold
- FDA and CDC ended mandatory cyclospora tracking in FoodNet program in 2025
How different outlets framed it
Left-leaning coverage: Left-leaning sources and Democratic lawmakers, including Senator Jon Ossoff, criticize federal health agencies for cuts to surveillance programs under the Trump administration. They argue that ending mandatory cyclospora tracking in the FoodNet program, along with broader CDC budget reductions, weakened outbreak detection and response capabilities, allowing the outbreak to spread uncontrolled and leaving investigators without adequate resources.
Right-leaning coverage: Right-leaning sources report on HHS Secretary Robert F. Kennedy Jr.'s assertions that the outbreak is "under control" and that the source has been identified through "extensive forensics." They note Kennedy's defense against criticism of surveillance program changes, arguing that cuts were for redundant programs and that the parasite itself presents inherent investigation challenges.
Limits of this briefing
The true number of cases is likely higher due to underdiagnosis and underreporting. A false positive lab result complicated confirmation of the Taylor Farms connection. Multiple separate outbreak clusters may be occurring simultaneously, and sources for cases in 29 non-Midwest states remain unidentified.
Sources
- CDC: Surveillance of Cyclosporiasis | Cyclosporiasis | CDC Centre
- ABC News: More than 11,500 cyclosporiasis cases reported in 41 states: CDC Centre
- The Hill: Ossoff slams RFK Jr. over cyclosporiasis outbreak and cuts to FoodNet surveillance Left
- Fox News: HHS chief Kennedy claims cyclospora outbreak 'under control' amid FDA probe Right
- CNN: Tracking the largest cyclosporiasis outbreak in the US Centre