● Live · Jul 22, 2026
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FDA called the iceberg lettuce Cyclospora test a false positive — the source investigation is back to square one

The FDA announced that a positive test result on shredded iceberg lettuce from Taylor Farms' Mexican operations was a false positive. The announcement came shortly after Taylor Farms de Mexico had voluntarily removed all iceberg lettuce sourced from central Mexico from the supply chain.

This is a significant reversal that complicates the public narrative around the outbreak. The voluntary removal happened before the false positive was confirmed, meaning product was pulled based on a result that didn't hold up — and the actual source of one of the largest Cyclospora outbreaks in U.S. history remains unconfirmed.

For buyers managing iceberg programs, this adds another layer of complexity: supply was disrupted for a product that may not have been the contamination source. Worth monitoring how FDA communicates next steps and whether Taylor Farms de Mexico product re-enters the market.

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