Eating roast beef and corned beef with Maple Leaf Consumer Foods labels may be dangerous to your health, the Canadian Food Inspection Agency (CFIC) warned Monday.

One-kilogram packages of Sure Slice Roast Beef with a best-before date of Aug. 9 and Sure Slice Corned Beef with an expiration date of Aug. 23 have already been recalled by Maple Leaf from restaurants, hospitals and nursing homes, but the CFIC is taking extra precautions with its alert after listeria bacteria was found in the meat products.

There are no reports yet of infection from listeria, which can cause high fever, severe headache, neck stiffness and nausea. Most vulnerable are pregnant women, the elderly and people with weakened immune systems.