Health officials are tracking a growing outbreak of a parasitic stomach illness that's now been reported in 31 states.
Since May, the CDC has confirmed 800 cases of cyclosporiasis, with more than 1,500 additional cases still under investigation. So far, 86 people have been hospitalized, but no deaths have been reported.
The hallmark symptom of a cyclospora infection is watery, often "explosive" diarrhea that can last for weeks or even months if left untreated, the CDC says.
The source remains unknown, though Michigan health officials believe the outbreak may be linked to fresh produce, including lettuce, basil, cilantro and snow peas.