CDC Parasite Outbreak Hits 18 States: Symptoms, Foods Under Investigation, and How to Stay Safe

The CDC is investigating a cyclosporiasis outbreak across 18 US states, with 700+ reported

What Is a Parasite Outbreak? Meet Cyclospora

Cyclosporiasis is caused by Cyclospora cayetanensis, a parasite so small it can only be seen under a microscope. People get sick by eating food or…

What States Have the Parasite Outbreak?

According to the CDC's surveillance data and state health departments, cases in 2026 have been reported in:

Parasite Outbreak Symptoms — and When to See a Doctor

Symptoms typically begin 2 to 14 days after exposure (about a week on average) and can last from a few days to more than a month. A distinctive…

What Food Caused the Parasite Outbreak?

Investigators haven't confirmed a single source yet. The CDC says there is currently no evidence that one multistate outbreak links all the cases…

How to Protect Your Family

Yes. Doctors typically treat cyclosporiasis with the antibiotic combination trimethoprim-sulfamethoxazole (sold as Bactrim or Septra), per CDC…

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