CDC investigating Cyclospora outbreak linked to 145 cases across 17 states.
The Centers for Disease Control and Prevention (CDC) reported 145 confirmed cases of Cyclospora cayetanensis infection in 17 US states between May 1 and June 16, 2025. Twenty individuals were hospitalized. No deaths have been reported.
Outbreak Overview
- Cases: 145 infections in individuals aged 5 to 86.
- States: Alaska, Colorado, Connecticut, Florida, Georgia, Illinois, Louisiana, Massachusetts, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Texas, Virginia, Wisconsin.
- Hospitalizations: 20.
- No travel history: All patients became ill without recent international travel, suggesting domestic foodborne transmission.
Symptoms and Incubation
Symptoms typically begin about one week after infection, primarily watery diarrhea, along with loss of appetite, weight loss, cramping, bloating, increased gas, nausea, and fatigue. Less common symptoms include vomiting, body aches, headache, and low-grade fever.
Infections may resolve without antibiotics but can last from several days to over a month.
Investigation
The CDC, FDA, and state authorities are investigating multiple clusters. The specific food source has not been identified.
Cyclosporiasis is a nationally notifiable disease, and cases typically increase during the summer season (May 1 to August 31). There is no evidence of person-to-person transmission.
Additional Context
In the same period, 45 travel-associated cases were reported, with three hospitalizations and no deaths.