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The FDA found Cyclospora in wastewater at Taylor Farms de Mexico’s lettuce processing facility and in a drainage ditch at a contract grower’s farm. The findings add environmental evidence to the link between recalled Taylor Farms iceberg lettuce and an outbreak that sickened 12,883 people, but the FDA says it cannot yet determine how contamination occurred.
The FDA found Cyclospora in wastewater at a Taylor Farms lettuce processing facility in Central Mexico and in a drainage ditch at a grower’s farm, adding environmental evidence to the investigation of a summer outbreak linked to the company’s iceberg lettuce. The outbreak sickened 12,883 people, led to 570 hospitalizations and two deaths, according to the CDC; the FDA says it still cannot conclusively determine how the lettuce became contaminated.
The FDA announced the findings on October 2, following onsite inspections and sample collection at multiple iceberg lettuce growers and a processing facility in Mexico. The agency coordinated the work with Mexican officials and collected samples of water, soil, sediment and lettuce.
Two samples tested positive for Cyclospora. One came from a tank holding outgoing wastewater at the Taylor Farms de Mexico processing facility; the other came from a drainage ditch at an iceberg lettuce grower identified through the FDA’s traceback investigation. The agency said genotyping of both samples is complete, but it is still analyzing how those results relate to genotyping of samples from outbreak patients.
The FDA said the positive environmental samples show Cyclospora was present where lettuce was grown and processed. It said that evidence adds to epidemiological data and traceback findings linking the outbreak to recalled shredded iceberg lettuce from the Taylor Farms operation in Central Mexico. Those findings do not, by themselves, establish the precise route or point of contamination.
Environmental Evidence in a Major Outbreak
The findings matter because they document Cyclospora in the production and processing environment connected to lettuce recalled during a large outbreak. The outbreak’s reported toll—12,883 illnesses, 570 hospitalizations and two deaths—shows the public health consequences associated with the investigation, while the environmental results add a new kind of evidence alongside patient data and product traceback.
For consumers and food businesses, the results also underline why outbreak investigations combine several lines of evidence. A positive sample at a site connected to the supply chain can support an association, but it does not establish when or how contamination reached food. The FDA’s continued analysis is needed to clarify how the environmental findings compare with samples from ill people.
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How Investigators Traced the Lettuce
Initial links between the outbreak and Taylor Farms iceberg lettuce emerged in July, after people who ate at Taco Bell restaurants became ill. The affected menu items contained iceberg lettuce that the restaurant chain sourced from Taylor Farms, according to the report. The FDA’s traceback investigation then identified several farms and a Mexican processing facility that supplied lettuce later recalled and distributed by Taylor Fresh Foods.
The CDC reported on September 11 that the outbreak had ended. The FDA’s October findings came after inspections and sampling at locations identified through the traceback work. The investigation’s identification of a supply-chain link and the detection of the parasite in environmental samples are related findings, but the agency has not said that it has established the contamination mechanism.
“There is currently not enough evidence to conclusively determine how contamination occurred in the outbreak.”
— U.S. Food and Drug Administration
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How the Lettuce Became Contaminated
The FDA has not established how Cyclospora entered or reached the lettuce, or whether either environmental sample matches the parasite found in outbreak patients. Although genotyping of the two positive environmental samples is complete, the agency said it is continuing to compare those results with ongoing genotyping of patient specimens.
The available findings also do not identify when contamination may have occurred or show that the samples themselves came from the lettuce eaten by people who became ill. The outbreak was reported ended by the CDC on September 11, but the source investigation’s genetic analysis remains ongoing.
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Genotyping and Facility Status
The next stated step is the FDA’s continued analysis of the environmental samples alongside genotyping from outbreak patients. The agency has not provided a date for completing that work in the information reported. Any further conclusion about the relationship between the samples and the outbreak will depend on those results and the broader investigation.
Taylor Fresh Foods told ABC News that the Central Mexico facility remains closed while it works on enhanced safety protocols. The spokesperson also said the grower where the drainage-ditch sample tested positive is no longer part of the company’s supplier program. The source material does not specify when the facility might reopen or what inspection or other conditions would apply.
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Key Questions
Where did the FDA find Cyclospora?
The FDA reported positive samples from a wastewater tank at Taylor Farms de Mexico’s processing facility and a drainage ditch at an iceberg lettuce grower identified in its traceback investigation.
How many people were affected by the outbreak?
The CDC counted 12,883 illnesses, 570 hospitalizations and two deaths. It reported on September 11 that the outbreak had ended.
Has the FDA determined how the lettuce was contaminated?
No. The FDA said there is not enough evidence to conclusively determine how contamination occurred. It is comparing the completed genotyping of the environmental samples with ongoing analysis of patient specimens.
Is the Taylor Farms facility still operating?
A Taylor Fresh Foods spokesperson told ABC News that the Central Mexico facility remains closed while the company works on enhanced safety protocols. The source material does not give a reopening date.
Source: rss
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