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.

The Centers for Disease Control and Prevention said Friday there are more than 800 confirmed cases of the food-borne intestinal illness cyclosporiasis that is typically contracted through contaminated...