Taco Bell is removing shredded iceberg lettuce from restaurants in five states following a multistate outbreak of cyclosporiasis [1], [3].

This action follows an investigation into the Cyclospora parasite, a gastrointestinal illness that has sickened thousands of people [1]. The scale of the outbreak highlights the vulnerability of fast-food supply chains to contaminated produce sourced from international growers.

Health officials linked the outbreak to shredded iceberg lettuce supplied by Taylor Farms [3]. The contaminated produce was distributed to Taco Bell locations in Michigan, Ohio, Indiana, Kentucky, and West Virginia [2], [4]. The lettuce in question was sourced from Mexico [4].

The FDA and CDC advised the company to stop using the specific supplier linked to the parasite [4]. Cyclospora is a parasite that causes prolonged diarrhea and stomach distress, symptoms that can persist for weeks if left untreated.

Officials have traced the contamination to the shredded iceberg lettuce used in various menu items [2]. The company has moved to hold the lettuce in the affected regions to prevent further illnesses [3].

Investigation efforts continue to determine how the parasite entered the supply chain in Mexico before the lettuce was processed by Taylor Farms and shipped to the U.S. [4].

The contaminated produce was distributed to Taco Bell locations in Michigan, Ohio, Indiana, Kentucky, and West Virginia.

This outbreak underscores the systemic risks associated with centralized produce sourcing in the fast-food industry. Because a single supplier like Taylor Farms distributes to numerous locations across multiple states, a localized contamination event in Mexico can rapidly become a multistate public health crisis. The reliance on imported, pre-shredded greens increases the difficulty of tracing contamination until after a significant number of consumers have fallen ill.