How to handle deli meats as CDC investigates listeria outbreak in the US

FILE - This 2002 electron microscope image made available by the Centers for Disease Control and Prevention shows a Listeria monocytogenes bacterium, responsible for the food borne illness listeriosis.

As U.S. health officials investigate a fatal outbreak of listeria food poisoning, they're advising people who are pregnant, elderly or have compromised immune systems to avoid eating sliced deli meat unless it's recooked at home to be steaming hot.