A northern California produce supplier is voluntarily recalling romaine lettuce that was shipped to 19 states, Puerto Rico and Canada over fears about possible E. coli contamination.

FOX News Radio's Jeff Monosso reports:

Salinas, California-based Tanimura & Antle recalling field fresh wrapped single head romaine. The recall based on random testing by the Canadian food inspection agency.

The company says some 2,100 cases of romaine lettuce were possibly affected and would have been at retail stores starting August 2nd. The lettuce, packed in a plastic bag with the UPC number 0-27918-20314-9 and may have had a "best by" date of August 19th.

So far, there have been no reported illnesses associated with the lettuce.

Jeff Monosso, FOX News Radio.

Editor's note: The romaine lettuce in question was shipped to Alabama, Arkansas, Arizona, California, Georgia, Kansas, Kentucky, Maryland, North Carolina, New Mexico, Nevada, New York, New Jersey, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, Washington, Puerto Rico and Canada.