In Canada, meat and cheese products from a Montreal-based company are being recalled due to
Listeria contamination, which may be undetectable to sight or smell but can cause severe illness, especially
to vulnerable populations like expectant mothers and the elderly.

http://www.cbc.ca/consumer/story/2010/07/20/con-deli-recall.html
http://www.torontosun.com/life/healthandfitness/2010/07/22/14791511.html