The U.S. Food and Drug Administration (FDA) says a lettuce sample from Taylor Farms that it previously reported as positive for cyclospora is a false positive. Multiple outlets report that FDA laboratory experts re-check the results and conclude the initial positive finding was incorrect, affecting how the investigation is interpreted. As of Sunday, the FDA says it has not identified any “confirmed positive sample results for product testing” for cyclospora.

The FDA’s update follows earlier reports of a cyclospora-associated outbreak that has sickened people across multiple states. Some coverage notes that the incorrect test result has created new confusion while federal officials continue their investigation into the outbreak’s source. One outlet also reports that attention remains on Taylor Farms lettuce tied to a recall, even though the specific sample that tested positive is now considered false.

While the FDA says the product testing has not confirmed cyclospora positivity, the agency continues monitoring and reviewing evidence related to the multi-state outbreak.