Cyclosporiasis Outbreak Linked to Contaminated Lettuce Across North America

A significant outbreak of cyclosporiasis, a parasitic infection caused by *Cyclospora cayetanensis*, is affecting regions across the United States and Canada. Approximately 5,000 cases have been reported, with the highest concentration occurring in Michigan. Other affected states include Ohio and Indiana, while Canadian health authorities have confirmed 50 cases across five provinces, including Quebec, Ontario, and British Columbia. Investigators have traced the source of the infection to contaminated lettuce distributed throughout the region.

Cyclosporiasis is typically transmitted via the faeco-oral route, often through contaminated agricultural water or poor handling practices. Once the parasite invades the small intestine, it causes severe, watery, and explosive diarrhea, often accompanied by abdominal cramping, fatigue, and nausea. The current crisis highlights the vulnerability of the supply chain for fresh, ready-to-eat produce that is consumed without cooking. Experts emphasize that the parasite is difficult to detect and prone to spreading in environments with varying sanitation standards.

In response to the growing evidence, the food chain Taco Bell has preemptively removed lettuce from its menu at various US locations. Health agencies, including the CDC, are conducting rigorous trace-back investigations to identify specific batches and prevent further spread. Authorities advise the public to wash all fresh greens thoroughly and monitor government health alerts for updates on recalled products. International travelers are encouraged to exercise caution regarding raw vegetable consumption until the supply chain is cleared and the source of the contamination is fully contained.