Health officials across the United States are tracking an unusual increase in cyclospora infections, a parasitic illness that spreads through contaminated food and water. The clusters represent higher case counts than typical seasonal patterns for this time of year, according to public health experts monitoring the outbreak.

Cyclospora cayetanensis causes severe gastrointestinal illness, including watery diarrhea, stomach cramps, and nausea that can last for weeks if left untreated. The parasite enters the food supply primarily through contaminated produce, particularly items like berries, lettuce, and other raw vegetables. Imported fruits and vegetables carry higher risk, especially those from regions where sanitation standards differ from the United States.

The uptick has prompted public health agencies to investigate the source of contamination. Epidemiologists typically trace cyclospora cases back to specific produce distributors or farms by interviewing affected individuals about their recent meals. This detective work helps prevent additional exposures by identifying which foods to avoid.

People who suspect cyclospora infection should seek medical attention rather than waiting for symptoms to resolve on their own. A healthcare provider can order stool samples to confirm the diagnosis, since cyclospora symptoms mimic other foodborne illnesses. Treatment with antibiotics like trimethoprim-sulfamethoxazole (TMP-SMX) effectively clears the infection, though some patients require extended courses if symptoms persist.

Prevention focuses on food safety habits. Washing all produce thoroughly under running water reduces risk, though washing does not completely eliminate parasites embedded in porous surfaces. Travelers returning from areas with poor sanitation should be particularly cautious, as they may unknowingly carry the parasite home.

The CDC encourages anyone experiencing persistent diarrhea and stomach pain to consult a doctor rather than assuming it will pass. Providing a detailed food history helps clinicians identify the likely source and