Cases of diarrhea caused by the parasite cyclospora continue to climb, and with the threat of weekslong illness and no certainty about the source, it’s easy to wonder: Is there anything in the produce aisle that’s safe to eat?

The source of the current US outbreak is unknown, but in the past, cyclosporiasis has been linked to raspberries, basil, snow peas, green onions, and lettuce.

An outbreak of diarrhea caused by the parasite cyclospora has risen to more than 3,000 cases in Michigan and Ohio.

CDC investigates a Cyclospora outbreak across 34 US states. Learn the symptoms, source, affected states, treatment and prevention steps.

Case numbers of this parasite-caused illness have exploded in the last week. An expert explains how to try and stay safe