The FDA said experts re-checked lettuce sample results from Taylor Farms in an investigation into 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.

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