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 the investigation into the outbreak of cyclosporiasis unfolded.

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…

It's probably not news to you that a parasite that causes explosive diarrhea has been surging in the US.

Cases have been reported across more than 40 states including Michigan, New York and Ohio

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.

US officials claim evidence points to lettuce grown in Mexico, which Mexico's Health Ministry disputes.

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