The false positive was discovered when the Food and Drug Administration re-reviewed the results of a sample from Taylor Farms de Mexico. It doesn’t change its earlier voluntary recall.

Taylor Farms is a top fruit and vegetable producer and restaurant supplier.

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.

As of Sunday, the FDA said there are no confirmed positive sample results for Cyclospora.