Two listeria-related recalls for frozen waffles and pre-packaged meat products have been issued in recent weeks.

This image provided by TreeHouse Foods, Inc., shows the packaging of two styles of waffles, among hundreds of brands of frozen waffles, that are part of a voluntary recall because the products could be contaminated with dangerous listeria bacteria,

TreeHouse Foods issued a voluntary recall last week for its frozen waffle products that are sold at many retailers in the U.S. and Canada.

TreeHouse Foods has expanded its recall of frozen waffles and other breakfast products over concerns of listeria contamination.