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Listeriosis
Contaminated food could be deadly

From Mary Kugler, R.N., for About.com

Updated: June 30, 2009

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

How food poisoning happens

How food poisoning happens

Photo © A.D.A.M.
The Centers for Disease Control and Prevention (CDC) estimates that between 1,100 and 2,500 cases of listeriosis (infection with the bacterium Listeria monocytogenes) occur in the United States each year. Approximately 25% of these people die as a result of the illness. It's likely, however, that this is an underestimate.

Certain People Are at High Risk

Healthy people who get listeriosis usually have only mild illness, such as fever, muscle aches, nausea, or diarrhea. The people at highest risk for serious, potentially deadly illness from listeriosis, such as bacteremia or meningitis, are newborn babies and people with weakened immune systems, such as those on steroids for any reason and people with cancer, diabetes, kidney disease, or AIDS. Pregnant women who get listeriosis are usually only mildly ill, but the infection can cause miscarriage, stillbirth, premature delivery, or infection in the baby.

How it is Spread

Listeriosis is spread through contaminated food. Ready-to-eat food, such as hot dogs and lunch meats, are often a source. In 2002, a listeriosis outbreak from contaminated turkey meat resulted in 46 illnesses, 7 deaths, and 3 stillbirths or miscarriages in eight U.S. states. Research in 2003 concluded that cases of listeriosis are not isolated, as once thought -- they occur in geographic clusters at about the same time. Researchers suggested that when a few cases occur, public health officials should look for more cases in the area.

How You Can Protect Yourself and Your Family

The U.S. government has a food safety program called Fight BAC! Consumers should follow the four simple steps of the program:
  • Clean: Wash hands, knives, cutting boards, dishes, and countertops with hot, soapy water after preparing food.
  • Separate: Keep raw meat, poultry, and seafood separate from vegetables, fruits, breads, and other food already prepared for eating. Keep the liquid from hot dog packages away, too.
  • Cook: Thoroughly cook food. Hot dogs should be steaming hot.
  • Chill: Refrigerate or freeze perishable food within 2 hours.
People at high risk for listeriosis (such as pregnant women or those with weakened immune systems) should avoid eating soft cheeses such as feta and Brie, refrigerated pates or meat spreads, and refrigerated smoked seafood, such as lox.

Sources:

"Listeriosis." Division of Bacterial and Mycotic Diseases. 12 Oct 2005. Centers for Disease Control and Prevention. 2 Sep 2007.

"Listeriosis and Pregnancy: What is Your Risk?" Foodborne Illness and Disease. Sep 2001. US Department of Agriculture. 2 Sep 2007.

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