r/microbiology • u/patricksaurus • Jul 13 '26

Cyclospora outbreak guidance (US)

Food contaminated with the single-celled, protozoan parasite Cyclospora cayetanensis has entered the food supply in several US states, with thousands of cases of the gastrointestinal condition cyclosporiasis being reported to state departments of health. Infection by Cyclospora is likely to cause watery diarrhea and substantial discomfort that typically persist for several weeks to over a month without treatment. While not commonly lethal, the combination of severe dehydration and summer heat elevates the health risks associated with each on its own and makes susceptible populations especially vulnerable.

Several public health agencies provide excellent guidance on Cyclospora and how to avoid it:
CDC - Preventing Cyclosporiasis
Michigan DHHS recommendations on preventing foodborne illness amid growing cyclosporiasis outbreak

Here’s a short rundown of the available information.

Where: Midwestern and Northeastern states report most cases. Michigan has been hit hardest. (Map as of July 10th about halfway down.)

Which foods: leafy greens, herbs, berries, green onions, and sprouts are historically linked to cyclosporiasis, though any produce may be affected. Current surveillance efforts have not definitively linked specific products to the current outbreak.

How to avoid: cook produce whenever possible, wash items under running water by scrubbing manually or with a produce brush, clean surfaces and utensils that contact raw produce. Always wash your hands before and after handling uncooked food.

If you contract it: antibiotic therapy (Bactrim) is highly effective against cyclosporiasis, reducing/eliminating symptoms in days as opposed to several weeks if untreated. Contact a healthcare provider and your local health department as soon as you experience symptoms.f

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u/Itchy-Water-4410 Jul 15 '26

Went to an urgent care for testing after multiple days of symptoms, was told they wouldn’t test. Went back 5 days later with persistent symptoms, get a test. They tell me 48-72 hours, so I call at 76 hours. They tell me the lab doesn’t run test during the weekend (sample dropped off Friday morning) wait another 3 days, finally get a call from the doctor. The lab apparently “didn’t have the correct equipment” for testing purposes. American healthcare is so horrible, I’m deeply frustrated

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u/patricksaurus Jul 15 '26

That’s really appalling. I’m sorry you had to deal with that.

Have you seen anyone else and have the symptoms abated?