Updated July 20, 2026 — Federal regulators have corrected a key laboratory detail in the investigation of a multistate Cyclospora outbreak linked to shredded iceberg lettuce.\n\nThe FDA said experts re-reviewed a lettuce sample that had been reported positive on July 18 and concluded the signal was not true amplification. The agency now says there are no confirmed positive product samples for Cyclospora as of July 19.\n\nThat correction does not cancel the recall or close the investigation. Epidemiological interviews and traceback work still point to shredded iceberg lettuce supplied by Taylor Farms de Mexico and served at affected Taco Bell locations. Taylor Farms continues removing implicated lettuce from the market, including listed food-service products and certain Marketside packages sold at Walmart.\n\nThe outbreak count remains 1,644 reported illnesses and 94 hospitalizations across five states, with no deaths reported. Consumers, restaurants and retailers should continue to discard recalled products and consult the FDA recall list for identifying details. Anyone with prolonged watery diarrhea or related symptoms after eating shredded iceberg lettuce should contact a health professional.\n\nCorrection: An earlier version reported the preliminary sample as a confirmed positive test. The FDA has withdrawn that finding after laboratory review.\n\nSource: U.S. Food and Drug Administration — https://www.fda.gov/food/outbreaks-foodborne-illness/investigation-5-state-outbreak-cyclospora-illnesses-iceberg-lettuce-july-2026\n\nSource: Taylor Fresh Foods recall notice via FDA — https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/taylor-fresh-foods-recalls-iceberg-lettuce-central-mexico-because-possible-health-risk