What to know about cyclosporiasis in Pa.
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Update July 14: The Allegheny County Health Department has identified 11 cases of cyclosporiasis as of noon on July 14. The health department is working with state and federal partners to investigate if there is a link between cases.
A gut-wrecking parasite that spreads through contaminated food is circulating nationwide — including in Pennsylvania.
The big picture: The gastrointestinal illness spreads during the summer months, and can cause symptoms like "explosive" or "watery" diarrhea, the CDC says.
By the numbers: Pennsylvania had reported 28 cases through July 9, including 11 in Western Pennsylvania, per the state Department of Health, and three in Allegheny County.
- The state had 40 reported cases in 2025.
- Pennsylvania had 87 reported cases in 2024.
Yes, but: That's probably not the full picture. The illness isn't on the state's official list of reportable diseases, so health care providers report cases voluntarily.
- Local health care providers should report cases of cyclosporiasis to the Allegheny County Health Department.
Zoom in: Symptoms, which also include loss of appetite, weight loss and abdominal cramping, can last for a few days or even a month or longer without any treatment, the CDC says.
- Anyone who believes they may have cyclosporiasis should contact their healthcare provider.
Treatment usually includes antibiotics, per the Cleveland Clinic.
- Some infections resolve without treatment.
Recently, cases in the U.S. have come from eating contaminated produce.
- Experts recommend washing produce under running water before eating or cooking.
- Firm produce items, like cucumbers or watermelons, should be scrubbed with a clean brush.
- Bruised or damaged areas of fruit should be cut off.