Sargento Foods Inc. said yesterday that the U.S. Food and Drug Administration has informed them that it made an error in the laboratory finding that led to Sargento issuing a voluntary cheese recall on July 27. "Following FDA's review of our supporting laboratory records for this sample and additional testing, we have determined that our initial finding of Listeria monocytogenes was incorrect," stated Gary L. Pierce, Regional Food & Drug Director of the FDA in Dallas, in a letter to Sargento dated August 24.