Boston Salads and Provisions Company recalled more than 200,000 pounds of chicken salad that was sold in New Hampshire and Massachusetts. Reser's Fine Foods recalled other packaged salads and deli items in the U-S and Canada. There have been no reports of illness, but the cases are raising questions about listeria.
Catherine Donnelly is an expert on the microbiological safety of food and a professor at the University of Vermont.
For more information about Listeria -- http://www.cdc.gov/listeria/index.html