CDC tracks intestinal parasite outbreak with 145 cases across 17 US states
Key Points:
- Federal health officials are investigating the source of a Cyclospora parasite outbreak causing prolonged gastrointestinal illness, with 145 confirmed cases across 17 U.S. states as of mid-June 2026.
- The infection, known as cyclosporiasis, leads to watery diarrhea lasting weeks or months, along with symptoms like abdominal cramping, nausea, fatigue, and weight loss.
- The outbreak season runs from May 1 to August 31, with New York reporting the highest number of cases, followed by Texas and Illinois.
- Among the confirmed cases, 20 patients required hospitalization, but no deaths have been reported; the median patient age is 42, and women account for 61% of cases.
- The CDC, FDA, and state health officials are investigating several clusters but have not identified a single source or multistate outbreak linking all cases.