What is Cyclospora cayetanensis? CDC reports parasite causing stomach illness across US, including Texas
CDC and San Antonio Metro Health offer some ways to help reduce the chances of infection
Luis Cienfuegos, Photojournalist
Ricardo Moreno, Photojournalist
Published:Â July 6, 2026 at 8:22 PM
A parasite is causing hundreds of cases of serious stomach and intestinal illness across several states, including Texas, according to the U.S. Centers for Disease Control and Prevention
The parasite is Cyclospora cayetanensis, which is microscopic, but the infection’s symptoms can be more obvious
The infection spreads when people ingest contaminated food or water
Produce has been linked to many of the reported cases, the CDC said
The CDC said Cyclospora can contaminate fruits, vegetables and water through human fecal matter
Infection begins when contaminated produce or water is swallowed
The CDC is reporting at least 145 cases in 17 states, including Texas. No deaths have been reported, but 20 people have been hospitalized
San Antonio Metro Health said it is aware of the outbreak, but no cases have been reported in San Antonio at this time. There is no evidence yet of a common link connecting the confirmed cases, according to health officials
Health officials said the outbreak is a reminder to take the following precautions:
- Wash produce before eating, cutting or cooking
- Wash hands with soap and water before and after handling raw fruits and vegetables. Alcohol-based hand sanitizer does not work.
- Avoid swallowing water during recreation, including at splash pads.
Metro Health also said people with diarrhea should avoid public pools
The most common symptom is severe diarrhea, described as profuse or explosive. Other symptoms can include stomach cramps, bloating, increased gas and nausea
Many people with healthy immune systems recover without treatment, but the infection can last from a few days to a month or longer, according to the CDC
If you are concerned, talk with your doctor about possible treatment options
Read also:
- What we know about the flu outbreak at Joint Base San Antonio-Lackland
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