Christine you may want to read this then too. I sure hope all your packages did not have the use by date in the article on them.
This is from the same article on the USDA's website.
Recommendations For People At Risk For Listeriosis
Wash hands with warm, soapy water for at least 20 seconds before and after handling raw meat and poultry. Wash cutting boards, dishes and utensils with hot, soapy water. Immediately clean spills.
Keep raw meat, fish and poultry away from other food that will not be cooked. Use separate cutting boards for raw meat, poultry and egg products and cooked foods.
Do not eat hot dogs, luncheon meats, bologna or other deli meats unless they are reheated until steaming hot.
Do not eat refrigerated pâté, meat spreads from a meat counter or smoked seafood found in the refrigerated section of the store. Foods that don't need refrigeration, like canned tuna and canned salmon, are safe to eat. Refrigerate after opening.
Do not drink raw (unpasteurized) milk and do not eat foods that have unpasteurized milk in them.
Do not eat salads made in the store such as ham salad, chicken salad, egg salad, tuna salad or seafood salad.
Do not eat soft cheeses such as Feta, quesco blanco, quesco fresco, Brie, Camembert cheeses, blue-veined cheeses and Panela unless it is labeled as made with pasteurized milk.
Use precooked or ready-to-eat food as soon as you can. Listeria can grow in the refrigerator. The refrigerator should be 40° F or lower, and the freezer 0° F or lower. Use an appliance thermometer to check the temperature of your refrigerator.