The Canadian Food Inspection Agency has issued a warning over meat products put out by Maple Leaf Consumer Foods over concerns about meat-borne bacterial contamination.

The agency and Burlington, Ont.-based company, said people should not eat Sure Slice brand roast beef and corned beef in one-kilogram packages.

They say there's a chance the product is contaminated with listeria.

The affected roast beef products have a best-before date of Aug. 9, while the affected corned beef packages have an Aug. 23 best-before date.

The food inspection agency said there have been no confirmed illnesses associated with eating the meat.

However, the products have been distributed nationally, primarily to restaurants, hospitals and nursing homes, and may also be sold at deli counters.

Consumption of food tainted with listeria can lead to high fever, severe headache, neck stiffness and nausea. Pregnant women, the elderly and people with weakened immune systems are particularly at risk.

With files from the Canadian Press