Texas is one the many states included in a voluntary recall of romaine lettuce because of fears about possible E. coli contamination.

The lettuce was shipped from a California produce supplier to 18 other states, including, Puerto Rico and Canada.

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.

Texas grocery stores selling Tanimura & Antle products include Aldi, Costco, HEB, Kroger (private label), Randall’s (Tom Thumb), Sam’s Club and Walmart, according to the company’s website.

The recall was being conducted in consultation with Food and Drug Administration, and was based on the testing of a random sample by the Canadian Food Inspection Agency. There have been no reported illnesses associated with consumption of this product.