美国有线新闻 CNN 美国2.1万磅冷冻批萨因可能感染李斯特菌被召回（在线收听）

AZUZ: If you got a frozen pizza in your house, have a look at the label before you bake it. U.S. Department of Agriculture announced last week that more than 21,000 pounds of frozen pizza had been recalled. The foods involved are processed by the RBR Meat Company in California. They are labeled Marketside supreme frozen pizza, and they were demonstrated by Wal- Mart centers in the American West, in California, Nevada, Utah and Washington.

The government's recall announcement said that no confirmations have been made that anyone's actually gotten sick from the pizzas, but that the risk is high. During routine testing of the foods, officials discovered they were contaminated with listeria.

SUBTITLE: What is Listeria?

ELIZABETH COHEN, CNN SENIOR MEDICAL CORRESPONDENT: Listeria is a bacteria that can be found in several different kinds of foods. For example, sprouts, deli meats, hot dogs, smoked seafood, soft cheeses and raw unpasteurized milk.

Healthy people, if they're exposed to listeria, they might get fever or diarrhea. But people who are at high risk, they can get fever, muscle aches, headaches, a stiff neck, confusion and convulsions.

Pregnant women who ate foods contaminated with listeria, they might get just a fever or maybe a fever and chills and headache. But the big risk is that listeria can cause miscarriages.

Listeria can kill. The Centers for Disease Control estimates that about 260 people die each year after eating foods contaminated with listeria. In addition, there are about 1,600 illnesses.

Now, you can reduce your chances from getting sick with listeria. So, first of all, rinse your produce, scrub firmed produce like melons and cucumbers with a brush, dry the produce, separate uncooked meats and poultry from other foods.

Soft cheeses like Brie and Camembert and feta, those are very popular. But look on the labels. Make sure they are made with pasteurized milk.