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Mexico says FDA lettuce probe did not conclusively identify contamination source

By Thomson Reuters Oct 3, 2026 | 6:41 PM

MEXICO CITY, Oct 3 (Reuters) – Mexico’s Health Ministry said on Saturday that a US Food and Drug Administration investigation into ​the cyclospora parasite outbreak linked to shredded ‌iceberg lettuce from Taylor Farms in Mexico did not conclusively identify the source of contamination.

• Mexico’s food-safety regulator Cofepris said tests conducted by its national reference ‌laboratory ​on raw materials, finished products ⁠and water from the ⁠facility investigated in the outbreak were negative for the cyclospora parasite.

• The regulator added that environmental findings alone do not constitute ​conclusive evidence that agricultural products were the source of contamination.

• The FDA said on Friday ⁠it found a strong ⁠epidemiological and traceback link between the ​outbreak and recalled shredded iceberg lettuce produced by ​Taylor Farms in Mexico, but said there ‌was insufficient evidence to determine how contamination occurred.

• The agency reported two environmental samples positive for cyclospora in Mexico, one from wastewater leaving ⁠a processing facility and another from a drainage ditch at an iceberg lettuce farm.

• The Centers for ⁠Disease Control ‌and Prevention declared the outbreak over ⁠on September 11. The outbreak sickened ​12,883 ‌people in 21 states, hospitalized ​570 and ⁠was linked to two deaths.

• Mexico said it cooperated throughout the investigation, providing traceability information, inspections and samples, and would continue technical cooperation with US health authorities.

(Reporting by Natalia Siniawski; Editing by ​Chizu Nomiyama )