Federal health officials said Monday they remain focused on lettuce from Taylor Farms as the source of a multistate outbreak of cyclospora, despite inaccurate test results that the government briefly publicized over the weekend. The Food and Drug Administration posted a positive finding for the parasite to its website on Saturday but said Sunday that the result was a false positive.
Taylor Farms announced last week it was recalling 25 shredded lettuce and salad mix products sold under eight different brand codes. The products are used by several U.S. food chains, including Taco Bell locations in five states where health officials initially linked the outbreak to cases of cyclosporiasis, a diarrheal illness caused by a microscopic parasite.
"FDA's traceback investigation and the outbreak data continue to converge on shredded iceberg lettuce from Taylor Farms' locations in central Mexico," FDA acting food chief Donald Prater told reporters Monday. In addition to tracing the supply chain, FDA staff have begun testing samples of produce coming across the U.S. border.
The false positive result came from a rapid test used to screen for traces of cyclospora, officials said. The sample that initially appeared positive was not part of Taylor Farms' recall but was released publicly because agency officials felt compelled to alert consumers. A subsequent quality control check confirmed the finding was an error, and FDA notified Taylor Farms on Sunday.
Taylor Farms publicized the corrected test results on social media and claimed "FDA apologized to us." Agency officials said there was no official apology issued by the government.
What the Right Is Saying
Republican lawmakers and industry groups say the premature release of faulty test data highlights communication problems within the agency that can damage businesses unfairly. They note Taylor Farms acted quickly to issue a recall once notified by federal authorities.
Conservative critics argue FDA's handling of the situation demonstrates how regulatory announcements based on incomplete information can devastate food suppliers and restaurant chains. Some Republican legislators have called for greater transparency around the validation processes for rapid testing methods before public notifications are issued.
"Companies like Taylor Farms that cooperate fully with investigations should not be subjected to false positive publicity," said one House Republican in a statement. "We need clear protocols ensuring test results meet rigorous standards before being shared with the public."
What the Left Is Saying
Democratic lawmakers and public health advocates say the incident underscores the need for more robust testing infrastructure at the FDA. They argue that rapid screening tools used for cyclospora detection require additional validation before results are released publicly, particularly given the difficulty of detecting this parasite in laboratory settings.
Consumer advocacy groups have called for increased funding for food safety inspections, noting that technicians cannot easily grow cyclospora in labs, making evidence gathering from contaminated produce challenging. Some progressive legislators have pointed to the central Mexico sourcing as a reason to strengthen import screening protocols.
"This is exactly why we need comprehensive food safety modernization," said one Senate Democrat who spoke on condition of anonymity to discuss pending legislation. "When you're dealing with imported produce and fast-moving outbreak data, precision in testing matters enormously for public health and consumer confidence."
What the Numbers Show
As of Friday, cyclospora had sickened at least 1,645 people in the U.S. and hospitalized 141 in 2026, according to FDA and CDC data. The agencies are investigating five separate clusters of illnesses, including the one traced to Taylor Farms products.
Foot traffic data from Placer.ai showed measurable declines at restaurant chains named in connection with the outbreak. Taco Bell suffered an 18.9% decline following federal health officials' announcement. Chopt saw a 14.3% drop, while Chipotle and Panera Bread each experienced nearly 7% decreases. Cava had a smaller impact at 4.2%, according to the firm that tracks foot traffic based on cellphone usage.
The recall covers products sold under eight brand codes distributed to multiple food chains nationwide. FDA acting commissioner Kyle Diamantas said health officials continued to see new cases associated with the outbreak, including some reported as recently as last week.
The Bottom Line
FDA officials say their investigation remains centered on Taylor Farms' central Mexico lettuce operations despite the testing error. The false positive incident illustrates the technical challenges of detecting cyclospora, a parasite that cannot be easily cultured in laboratory settings and requires specialized screening methods.
The outbreak has had measurable financial consequences for restaurant chains linked to the contaminated produce. Taco Bell's significant foot traffic decline suggests consumers may be making different dining choices while the investigation continues.
Taylor Farms maintains it acted responsibly by issuing a recall once notified of potential contamination concerns. The company disputes any suggestion that FDA issued an apology, though agency officials have not publicly contested the company's version of events regarding communication about the corrected test result.