Ohio is second in the nation for cases of an intestinal parasite that causes explosive diarrhea amid a nationwide outbreak, with the number more than doubling in the past week.

Cases of cyclosporiasis, a parasitic foodborne illness that can cause "explosive" diarrhea, are being reported across the United States, including in Rhode Island.

While the source has not yet been identified, past outbreaks have been linked to foodborne illness in raw produce.