General Information

Cyclosporiasis is an illness that causes diarrhea and stomach pain. It is caused by the Cyclospora cayetanensis parasite, which is so small it can only be seen with a microscope.

The parasite is common in tropical countries. In the U.S., people can get sick by traveling to or eating fresh produce imported from tropical countries.

The Cyclospora parasite is spread when people eat or drink something that has been contaminated with poop, especially fresh produce (herbs, vegetables, berries) and untreated water. Cyclospora cannot be spread from person-to-person.

Cyclosporiasis fact sheet, P-42041 (PDF)

Centers for Disease Control and Prevention (CDC) Cyclosporiasis travel information

Information for Providers

Wisconsin case reporting and public health follow-up guidelines:

Case Reporting and Investigation Protocol (EpiNet): P-01883 Cyclosporiasis (PDF)
Cyclosporiasis Case Report Form (PDF)

Questions about Cyclosporiasis? Contact us!
Phone: 608-267-9003 | Fax: 608-261-4976

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Last Revised: September 21, 2021