Cyclosporiasis
UPDATED July 17, 2026
What You Need to Know About the Cyclosporiasis Outbreak
Cyclosporiasis is a parasitic illness affecting thousands of Americans. We are sharing this information so you can recognize the symptoms, understand how the illness spreads, and take steps to protect yourself and those around you.
Stay informed with real-time updates
Public health conditions change quickly. Access real-time updates from the CDC including cases reported, hospitalizations and states reporting cases.
Understanding cyclosporiasis
Cyclosporiasis is caused by Cyclospora cayetanensis, a microscopic parasite found in contaminated food and water. The illness is not spread from person to person — it requires ingestion of the parasite to cause infection.
Symptoms to watch for
- Watery diarrhea, often frequent and prolonged
- Loss of appetite and weight loss
- Stomach cramping, bloating and nausea
- Fatigue and low-grade fever
Symptoms typically begin one week after exposure and may last from a few days to several weeks if left untreated. If you are experiencing these symptoms, contact your healthcare provider.
Source: CDC — Cyclosporiasis
How it spreads
- Consuming fresh produce — particularly leafy greens, herbs and berries — contaminated with the parasite
- Drinking or using water contaminated with Cyclospora
- Contact with contaminated soil in agricultural or garden settings
Testing and treatment
Cyclosporiasis is treatable. Early diagnosis allows for faster recovery and helps limit further spread.
Getting tested
- Testing requires a stool sample analyzed by a laboratory for the presence of Cyclospora parasites.
- Standard stool tests do not always detect Cyclospora — inform your healthcare provider of any recent exposure to potentially contaminated food or travel history so they can request the appropriate test.
Source: CDC — Cyclosporiasis Diagnosis
Treatment options
- The standard treatment is a course of antibiotics prescribed by a healthcare provider.
- Most people recover fully with appropriate treatment.
- Individuals with weakened immune systems may experience more severe illness and should seek care promptly.
- Staying well-hydrated is important, particularly for young children and older adults.
Food safety and prevention
Protecting yourself starts with the food you prepare and consume. The following practices reduce the risk of exposure.
At home
- Wash all fresh fruits and vegetables thoroughly under running water before eating, cutting or cooking — including pre-washed produce.
- Scrub firm produce like melons and cucumbers with a clean produce brush.
- Remove and discard outer leaves from lettuce and leafy greens.
- Avoid consuming raw produce from sources linked to the outbreak; refer to FDA outbreak advisories for specific product guidance.
- Wash hands thoroughly with soap and water before handling food and after using the restroom.
- Prevent cross-contamination: Clean and sanitize food preparation surfaces, cutting boards and utensils regularly.
Source: CDPH – Cyclosporiasis
When purchasing food
- Check for recall notices and advisories before purchasing produce items associated with the outbreak.
- Avoid buying produce that appears damaged or improperly stored.
- Purchase from suppliers who follow verified food safety standards.
Frequently asked questions
No. Cyclosporiasis does not spread through direct contact between people. A person becomes infected only by ingesting food or water that contains the Cyclospora parasite. Standard hygiene practices — particularly thorough handwashing — remain important for overall food safety. (CDC)
Symptoms typically appear about one week after consuming contaminated food or water, though the incubation period can range from two days to two weeks. (CDC)
Cyclosporiasis occurs in many countries, but it is most common in tropical and subtropical regions. In the United States, foodborne outbreaks of cyclosporiasis have been linked to various types of fresh produce imported from Latin America, including raspberries, cilantro, basil, snow peas and mixed salad. (CDPH)
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