Salinas-based Tanimura & Antle says the recall is limited to a single lot of its Field Fresh Wrapped Single Head Romaine that was available at retail stores starting Aug. 2. The lettuce is packed in a plastic bag with the UPC number 0-27918-20314-9, and it may have a "best by" date of Aug. 19.
The product was packed with either 12 or 18 heads per case.
The recall is based on the testing of a random sample by the Canadian Food Inspection Agency. There have been no reported illnesses associated with eating the product.