The Canadian Food Inspection Agency (CFIA) has expanded a recall issued earlier this month to include 29 salads.
The agency says prepared salads, coleslaw and spinach dip made by Beaverton, Ore.-based Reser’s Fine Foods may be tainted with Listeria.
They were sold under the Reser’s Fine Foods, Market Pantry and Stonemill Kitchens brands and in bulk.
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The products came from the Reser’s plant in Topeka, Kan., and were distributed across the U.S. and Canada.
The CFIA discovered Listeria at the plant using microbiological tests, and when the U.S. Food and Drug Administration followed up, it found bacteria on surfaces which may have come into contact with many different products.
No one has reported becoming sick after eating the salads since the recall started on Oct. 5.
Food contaminated with Listeria bacteria might not look or smell spoiled and can cause high fever, severe headache, neck stiffness and nausea.