Federal investigators and the CDC linked a Cyclospora outbreak to shredded iceberg lettuce supplied by Taylor Farms and served at Taco Bell restaurants.

This outbreak represents the largest known instance of cyclosporiasis in the U.S., highlighting vulnerabilities in the industrial produce supply chain. The scale of the contamination has forced a wide-scale investigation into how the parasite entered the food stream.

The outbreak has sickened an estimated 1,644 people [1] and resulted in 94 hospitalizations [1]. While early reports indicated the illness was concentrated in five states [1], the CDC has since expanded the affected area to nine states [3].

Those nine states include Illinois, Kansas, Oklahoma, Pennsylvania, Indiana, Kentucky, Michigan, Ohio, and West Virginia [3]. The contaminated product was shredded iceberg lettuce provided by Taylor Farms [1].

Investigators believe the lettuce was contaminated with the Cyclospora parasite during processing at a Taylor Farms facility located in Mexico [5]. The parasite causes cyclosporiasis, a diarrheal illness that can persist for weeks if left untreated.

Public health officials continue to monitor the situation as the number of reported cases fluctuates. Some reports suggest thousands of people may have been affected [5], though the official confirmed count stands at 1,644 [1].

The outbreak has sickened an estimated 1,644 people.

The link between a Mexican processing facility and restaurants across nine U.S. states underscores the complexity of the modern agricultural supply chain. Because Cyclospora is often resistant to standard washing, this event may prompt federal regulators to implement stricter oversight or new testing protocols for imported shredded produce to prevent similar large-scale outbreaks.