Mystery of explosive diarrhea parasite outbreak in the US — as experts try to figure out what’s causing it

A stomach-churning parasite that causes explosive, watery diarrhea has sickened over 140 people across multiple states — with the highest number of cases in New York.

According to the CDC, 145 people ranging in age from 5 to 86 years and from 20 states contracted the parasite Cyclospora cayetanensis between May and June 16, with 20 hospitalized.

Fortunately, there have not yet been any deaths.

Since none of the patients had traveled recently, officials believe the cause is food — although they’re unsure of the exact source.

The cyclospora parasite causes cyclosporiasis, a type of food poisoning that leads to diarrhea, severe cramping, nausea, vomiting, and fatigue.