Federal officials on Monday reaffirmed that iceberg lettuce from Taylor Farms still appears to be the source of Cyclospora, the microscopic parasite behind a multi-state surge in explosive diarrhea cases. The assertion was intended to clear up confusion that began swirling over the weekend around a false positive test from the Food and Drug Administration —which Taylor Farms celebrated , sparking confusion. Still, many details of the outbreak remain murky, largely due to the vague recall information Taylor Farms has publicly provided.

On Friday, the FDA, along with the Centers for Disease Control and Prevention, announced that the FDA's traceback investigations for the outbreak converged on Taylor Farms. Traceback investigations work by tracking backward from sick people and the foods they ate to where those foods came from through the supply chain, down to individual farms or production facilities. When the FDA said their investigation converged on Taylor Farms, the agency means that, over and over again, tracebacks led them to shredded iceberg lettuce grown in Central Mexico and supplied by Taylor Farms—which also goes by Taylor Fresh Foods.

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