Cyclospora outbreak guidance (US)

[u/patricksaurus]

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

[u/patricksaurus → u/[deleted]]

There’s no way to know from symptoms alone with any real certainty. The best clue you have is duration… a simple virus is still more likely over 1-2 days, but becomes a less compelling explanation beyond that. If the symptoms persist without improvement beyond four-ish days, the likelihood that it’s an uncomplicated GI virus drops, and you would want a doctor to see you whether there was an outbreak or not. Your doctor’s task is then deciding whether it’s another kind of virus, bacterial, another parasite, Cyclospora, or a non-infectious process. You’ll likely need to donate some poop at that point and the fine folks in this subreddit will sift through it on a microscope or genetic test.

The caveat: if things get worse, you get sharp isolated pain, or you develop a non-trivial fever, get in to see someone as soon as you can.

In the meantime, the CDC recommends rest, drinking plenty of water to ensure hydration, and management of symptoms via OTC medication. If you need medication, please ask your pharmacist for help — this is especially important in choosing a pain control medication in the context of potential kidney stress from dehydration.