Foodborne illness cases tend to draw national attention each summer as federal and state agencies track infections linked to fresh produce and water. Cyclosporiasis is one of those illnesses, with the Centers for Disease Control and Prevention identifying it as an intestinal infection caused by the parasite Cyclospora cayetanensis. Current public guidance from the CDC and state health departments focuses on spread, symptoms, prevention, and the standard treatment used in the U.S.
How cyclosporiasis spreads
The CDC said cyclosporiasis spreads when people consume food or water contaminated with Cyclospora cayetanensis. U.S. investigations have often linked outbreaks to fresh produce, including imported items, according to CDC outbreak notices published in prior summer seasons. The parasite is not known to spread directly from one person to another in the way some other stomach illnesses do, because it needs days to weeks in the environment to become infectious, the CDC stated.
State and local health departments generally confirm cases through stool testing ordered by clinicians. The CDC has said infections in the U.S. are reported every year, with seasonal increases often seen in spring and summer. Officials have not tied every case to a single source, and agencies do not always release a full list of where contaminated products were sold during an active investigation.
Symptoms and what is confirmed now
The CDC said common symptoms include watery diarrhea, loss of appetite, weight loss, stomach cramps, bloating, nausea, fatigue, and low-grade fever. Symptoms can begin about 1 week after a person consumes contaminated food or water, according to the agency. Some people may also have vomiting or body aches, while others can carry the parasite without obvious symptoms.
Illness can last from a few days to more than a month if it is not treated, the CDC stated. Symptoms may appear to improve and then return, which is one reason doctors may order specific lab testing. Public health agencies have said not every gastrointestinal illness is cyclosporiasis, and only lab-confirmed testing can distinguish it from many other causes of diarrhea.
Prevention and treatment
The CDC said washing hands with soap and water is an important prevention step, especially before eating or preparing food and after using the bathroom. Federal health officials also note that washing produce may not fully remove Cyclospora, which is one reason outbreak investigations often focus on tracing supply chains. There is no vaccine to prevent cyclosporiasis, according to the CDC.
For treatment, the CDC said the standard therapy is the antibiotic combination trimethoprim-sulfamethoxazole, often called TMP-SMX. People who are not treated can remain ill for weeks or longer, while some patients who cannot take sulfa drugs may need other supportive care discussed with a clinician, the agency stated. Public health guidance in the U.S. continues to center on diagnosis, traceback investigations, and seasonal monitoring by state and federal officials.
