issued a report Wednesday indicating cases of a parasitic infection that causes "explosive" watery diarrhea are on the rise in the United States. Cyclosporiasis, a gastrointestinal illness, has sickened dozens of people in Michigan and popped up in clusters around the country. The CDC reports cases have been on the rise in multiple states since May and at least 20 people have been hospitalized nationwide. The parasitic infection is commonly linked to fresh produce.