The FDA withdrew a positive test that tied Taylor Farms' lettuce to the cyclospora outbreak.

The FDA issued an update on the cyclospora outbreak in the United States late Friday, confirming that a single supplier has been identified as the source.

Taylor Farms de Mexico lettuce sample tested positive for cyclospora, FDA said, as officials investigate a multistate outbreak of the parasite.

‘Today, FDA apologized to us,’ Taylor Farms said in a statement