Listeria, a very common microorganism that contaminates protein-rich foods, affects people with a weakened immune system, those over 65, pregnant women and infants. While cooking kills listeria, foods can easily be recontaminated by it. The infection can spread to the nervous system and can cause headaches, stiff neck,and loss of balance and convulsions.
Antibiotics are the usual treatment.
Use unopened packages within two weeks. Reheat foods like hot dogs, sausages and cold cuts to steaming hot 165 degrees Fahrenheit. Don't use the microwave, as it heats unevenly. Take steps to avoid food poisoning. Make sure your food is pasteurized, adequately heated and thrown away on a timely basis.