Cyclosporiasis Outbreak: What You Need to Know 

WVU Medicine Emergency Expert weighs in on parasitic illness 

July 13, 2026
 
 

A recent outbreak of a foodborne parasitic infection is causing widespread gastrointestinal illness, known as Cyclosporiasis, across the United States.  

Several official cases have been reported in West Virginia, as well as cases confirmed in nearby Virginia, Pennsylvania, Ohio, and Maryland.  The majority of cases in West Virginia have been in the southern region of the state.

“Cyclosporiasis can cause intense gastrointestinal symptoms and be an uncomfortable experience for those infected,” said Ben Deuell, DO, WVU Medicine Emergency Medicine Specialist. “The good news is that most people will get better on their own. But there are symptoms and complications to watch out for.” 

Symptoms of Cyclosporiasis 

The primary symptom of cyclosporiasis, according to Dr. Deuell, is extreme, watery diarrhea that can be uncontrollable.  

Other symptoms include: 

  • Gas.
  • Stomach cramps and nausea.
  • Flu-like symptoms.
  • Appetite loss.
  • Severe fatigue.

How Does Cyclosporiasis Spread?

Dr. Deuell of WVU Medicine works in the Emergency Department at Berkeley Medical Center.
Dr. Deuell in the Emergency Department at WVU Medicine Berkeley Medical Center.

The parasite that causes cyclosporiasis spreads through contaminated food. It may take up to two weeks outside the body for Cyclospora to become infectious, so it’s extremely unlikely to spread person-to-person.  Once contracted, the incubation (time to symptoms onset) is 2 days to 2 weeks (average of 1 week). 

The source of this most recent outbreak has not been determined based on the most recent reports, but past outbreaks of cyclosporiasis have been connected to various types of fresh produce. 

“I recommend following general food safety preparation guidelines,” Dr. Deuell said. “Wash fruits and vegetables well, cook food to safe temperatures, wash your hands, and keep cooking areas clean and sanitized.” 

Treatment and Outlook 

If you suspect you have cyclosporiasis, it’s important to let your healthcare provider know and to seek proper treatment and to monitor the infection.  If indicated, the treatment of choice is an antibiotic.  Your healthcare provider can guide you if antibiotic treatment is indicated for your gastrointestinal symptoms.  Most gastrointestinal illnesses do not require antibiotics.   

"Young children, elderly adults and those with compromised immune systems are most at risk for severe cases,” Dr. Deuell said. “Most others will likely make a full recovery from cyclosporiasis even without treatment.” 

The most likely complication, according to Dr. Deuell, is dehydration.  

“Those with cyclosporiasis need to drink plenty of fluids and rest,” he said. “If dehydration becomes severe, you may need to seek emergency treatment.” 

Learn more about emergency, urgent, and primary care at WVU Medicine in the Eastern Panhandle and surrounding regions.  

 

Ben Deuell, DO

Featured Expert

Ben Deuell, DO.