Story highlights Possible listeria contamination prompted a major produce supplier to recall products

Certain people are at increased risk of serious infection, including pregnant women and newborns

(CNN) A leading vegetable supplier in California, Mann Packing, voluntarily recalled products that might have been contaminated with a harmful bacteria called listeria, the company announced last week.

The recall affects packaged produce at multiple supermarkets across the United States and Canada including Walmart, Whole Foods , Trader Joe's, Meijer, Albertson's and Safeway.

"Mann Packing is issuing this recall out of an abundance of caution," the company said in a statement, adding that it is cooperating with US and Canadian health officials to recall the products.

No illnesses have been linked to the products, the company said. The contamination risk was picked up by the Canadian Food Inspection Agency through random sampling.

The affected items were listed as "best if used by" October 11 to October 20. Customers should not consume these items but should discard them or return them to the place of purchase.