Florida Confirms Nearly 50 Cases of "Explosive" Diarrhea Parasite, Including Cases in Tampa Bay

TAMPA, FL — Florida health officials are urging residents to stay informed but not alarmed as cases of cyclosporiasis, a foodborne diarrhea-causing parasite, continue to rise across the state and the country.

The Numbers 

The Florida Department of Health has confirmed close to 50 cases of cyclosporiasis statewide between May 1 and July 4, 2026, including cases spread across the Tampa Bay area — with two each in Hillsborough and Polk counties, and one each in Pasco and Pinellas counties. Nationally, the CDC has confirmed more than 800 cases across 31 states as of July 10, with health officials cautioning that true case numbers are likely higher than reported.

What It Is - Diarrhea Parasites

Cyclosporiasis is caused by the microscopic parasite Cyclospora cayetanensis, which spreads through food or water contaminated with feces — not person-to-person contact. Symptoms, including "explosive" or watery diarrhea, stomach cramps, bloating, and nausea, can take up to two weeks to appear and may last for days or even longer without treatment.

Where It's Coming From 

Historically, U.S. outbreaks have been traced to fresh produce like bagged salads, raspberries, cilantro, basil, and snap peas — but health officials have not yet identified the source of this year's outbreak.

What Experts Recommend 

"When you ingest an infected fruit or vegetable, normally about two to 14 days, you will have the symptoms," said Dr. Adelor Zamora, medical director of the Infection Prevention Control Program at HCA Florida Brandon Hospital. Health officials recommend thoroughly washing all raw produce, choosing whole heads of lettuce over pre-bagged salad kits, and cooking produce when possible — heating food to an internal temperature of 158°F effectively kills the parasite.

Why It's Worth Knowing 

The CDC considers May 1 through Aug. 31 to be cyclosporiasis season each year, as warmer temperatures create more favorable conditions for the parasite. While the illness isn't considered life-threatening, health officials say awareness and basic food-safety precautions remain the best defense during peak season.

📍 Statewide, including Hillsborough, Pasco, Pinellas, and Polk counties 

📅 Cases confirmed May 1 – July 4, 2026 (ongoing) 

🌐 floridahealth.gov for updated case counts