CDC confirms 4,173 U.S. Cyclospora cases as it investigates a lettuce-linked outbreak. More than 7,400 additional reports remain under review.

More than 30 American states have reported illnesses related to Cyclospora, an intestinal parasite that contaminates food that has come into contact with human feces. Here's how…

Some US states are facing a large and growing outbreak of diarrhea caused by cyclospora, a microscopic parasite that can contaminate fresh food or water.