The FDA said that as of Sunday, it had not found any "confirmed positive sample results for product testing for Cyclospora."

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.

Walmart has removed iceberg lettuce from Taylor Farms for risk of cyclospora. The move comes amid an outbreak investigated by the CDC and FDA.

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