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Source of U.S. diarrhea-causing outbreak back in question after FDA declares false positive

A U.S. outbreak of cyclosporiasis linked to contaminated produce remains under review as authorities revisit a recent test result that initially pointed to a single source. The investigation centers on Taylor Farms, a major leafy greens supplier based in Salinas, California, and follows new information from federal health agencies indicating a false positive in earlier testing.

Public health officials had previously named Taylor Farms as a potential origin in the widespread intestinal illness, which can cause severe diarrhea, stomach cramps, and weight loss. Cyclosporiasis is caused by the parasite Cyclospora cayetanensis and is typically associated with imported produce or contaminated fresh greens. However, the latest assessment calls into question whether the Taylor Farms facility was the definitive source of the infections.

Health authorities did not identify a confirmed alternative source or a new timeline, stating that the investigation is ongoing and that multiple lines of inquiry remain active. They emphasized that food safety investigations can be complex, requiring genetic testing, traceback analyses, and epidemiological studies to establish a direct link between a supplier and reported cases.

Taylor Farms has historically been a major supplier of fresh produce to retailers and foodservice operations across the United States. The company has not provided a public comment within the provided material, and no new statements from them were included in the latest update.

Officials have urged consumers to practice standard food safety measures, including thorough washing of fresh produce and careful handling to reduce the risk of foodborne illness. They also advised individuals experiencing symptoms such as prolonged diarrhea, stomach cramps, or nausea to seek medical care promptly.

No new case counts, geographic distribution details, or reassessment timelines were released in the latest briefings. Health departments continue to coordinate with federal agencies to determine whether the initial link to Taylor Farms will be upheld or revised as additional data becomes available.

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