Federal health officials identified shredded iceberg lettuce imported from Mexico and served at Taco Bell restaurants as the source of a parasite outbreak.
The discovery highlights vulnerabilities in the international produce supply chain and the rapid spread of foodborne illnesses across multiple state lines.
The U.S. Centers for Disease Control and Prevention (CDC) and other health officials traced the outbreak to five states [2]. These locations include Indiana, Kentucky, Michigan, Ohio, and West Virginia [2]. The contaminated produce was distributed to Taco Bell restaurants within these regions [1].
According to reports, more than 1,644 people have fallen ill [3]. The illnesses were caused by the parasite *Cyclospora cayetanensis*, which leads to a condition known as cyclosporiasis [1]. This parasite typically causes severe diarrheal illness and can persist for weeks if left untreated [1].
Investigation reveals the shredded iceberg lettuce originated in Mexico before being shipped to the U.S. [1]. The parasite is often linked to contaminated water or soil used during the farming process, a common issue with imported fresh produce.
Health officials continue to monitor the situation as they work to ensure all contaminated batches are removed from the supply chain. The focus remains on preventing further infections in the affected Midwest and Appalachian regions [2].
“More than 1,644 people have fallen ill”
This outbreak underscores the systemic risks associated with importing fresh produce from regions with varying water-quality standards. Because shredded lettuce is consumed raw, there is no kill-step—such as cooking—to eliminate parasites like Cyclospora before it reaches the consumer. The scale of the infection across five states suggests a widespread contamination at the source or during the initial processing phase in Mexico.
