CDC links Mexican lettuce at Taco Bell to cyclospora outbreak across five states

Late Thursday evening, federal health officials announced what investigators had been quietly tracking for weeks: lettuce from a single Mexican farm, served at Taco Bell restaurants across five states, had sickened thousands of people with cyclospora, a parasite that causes severe diarrhea and can linger in the body for a month. The Centers for Disease Control and Prevention issued a direct warning to consumers in Indiana, Kentucky, Michigan, Ohio, and West Virginia to avoid shredded iceberg lettuce from the chain. What began as scattered reports of illness had grown into something far larger—more than 30 states now reported infections, and the numbers had already surpassed the previous American record of roughly 4,700 cases set in 2019.

The outbreak traces back to a specific supplier, identified through FDA traceback investigation, though federal warnings did not publicly name the company. Taylor Fresh Foods, the California-based produce distributor, acknowledged on Friday that it was withdrawing all iceberg lettuce from the affected region indefinitely. The company stated that the contaminated source represented less than one percent of the nation's iceberg lettuce supply, and that none of its branded salads were directly linked to the outbreak. Still, the precaution reflected the seriousness of what was unfolding. Taco Bell had already begun removing ingredients from select locations earlier in the week, and now committed to stopping all use of lettuce from the identified supplier.

Cyclospora is a microscopic parasite that thrives in warm weather, which is why outbreaks cluster in late spring and summer. The illness it causes, cyclosporiasis, produces watery diarrhea that can be sudden and severe, along with fatigue and nausea. Most cases resolve with antibiotic treatment and are not life-threatening, but the duration—sometimes stretching across four weeks—makes the infection genuinely debilitating. The parasite spreads through feces and typically contaminates produce when irrigation water has been exposed to human waste. In this case, investigators were working to determine whether contaminated lettuce remained on store shelves in states beyond the initial five.

For years, cyclosporiasis was relatively rare in the United States, and many cases went undiagnosed because standard food-poisoning tests were not designed to detect it. But roughly a decade ago, reported cases began climbing. A particularly sharp spike occurred in 2018 and 2019, and experts now attribute the rising trend to two factors: better detection methods that catch cases previously missed, and the climate crisis, which extends the warm season when the parasite thrives. The 2019 outbreak had been the worst on record until now. This year's numbers suggest the outbreak is still unfolding, with the FDA continuing to investigate whether potentially contaminated lettuce from the same source had reached other parts of the country.

The scale of this outbreak—thousands of people across more than 30 states experiencing the same illness traced to a single farm—underscores how interconnected American food systems have become, and how quickly a contamination event can ripple across the country. Taco Bell's voluntary removal of ingredients and the supplier's decision to halt distribution were reactive measures, but the real work now belongs to federal investigators trying to determine the full extent of the contamination and whether more lettuce from this source remains in circulation. For consumers in the affected states, the warning was straightforward: do not eat shredded iceberg lettuce from Taco Bell until further notice.