(CNN) — A California company has issued a nationwide recall on its romaine lettuce after the lettuce tested positive for salmonella in Wisconsin, according to a statement from the company.

No illnesses have been linked to the lettuce, the statement said.

The Wisconsin Department of Agriculture conducted a random test on romaine lettuce from Tanimura & Antle Fresh Foods, Inc., the company said in a statement, and found the bacteria.

The company has also recalled its romaine lettuce distributed in Puerto Rico and Canada.

Customers in 29 states received the lettuce, according to the company: Alabama, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Massachusetts, Michigan, Missouri, Nebraska, New Hampshire, New Mexico, Nevada, North Carolina, Ohio, Oregon, Pennsylvania, Tennessee, Texas, Utah, Virginia, Wisconsin and Wyoming.

The cartons being recalled are marked with lot code 531380 and were harvested from June 25 to July 2.

Despite the lettuce being past its shelf life, Tanimura & Antle cited an "abundance of caution" in issuing the recall.

The company said it had notified its customers on Tuesday about the recall and told them to “discard any existing product.”

The voluntary recall affects single, whole heads of lettuce with a shelf life of 14 to 16 days after harvest dates from June 25 to July 2, the company said.

WOW! That kills the lettuce and tomato orders for a while! I don't need help getting sick on my own cooking!!!

Thanks, DG.