Parasite Causing ‘Explosive’ Diarrhea Surges Nationwide, but King Co. Cases Remain at Normal Levels

Parasite causing ‘explosive’ diarrhea surges nationwide, but King Co. cases remain at normal levels

The microscopic parasite Cyclospora, which has been reported to cause explosive diarrhea, is surging across the U.S., but the number of cases in King County remains at normal levels.

60 cases of stomach illness in Florida caused by cyclospora parasite

A tiny parasite wreaking havoc in the U.S. this summer is responsible for more than 60 cases of gastrointestinal illness in Florida.

'Explosive diarrhea' parasite cases spike in Florida. See where

A literal stomach bug that causes “explosive diarrhea” has been spreading across the United States, including Florida.

Stomach bug causing ‘explosive’ diarrhea reported in Pa. What you need to know

A stomach bug that can lead to weeks of “explosive” or “watery” diarrhea has arrived in Pennsylvania. Pennsylvania has seen 28 reported cases of the intestinal infection cyclosporiasis as of Thursday, a state Department of Health official told Axios. By comparison, 40 cases were reported in all of 2025, and 87 in 2024, according to the health officials. The US Centers for Disease Control and Prevention is tracking a multi-state outbreak of cyclo…

What to know about the intestinal parasite causing ‘explosive’ diarrhea in Pa. and N.J.

If left untreated, symptoms can last anywhere between a few days and a month or longer.

Cases of 'explosive diarrhea' have nearly doubled in Florida in 2026

The scramble is on to find the source of multi-state surge in a parasitic infection. Florida is among them. What to know.