于１９９６～１９９７年组织了全国１２个省，对国内七类食品３７４６份样品进行单核细胞增生性李斯特氏菌（Ｌｉｓｔｅｒｉａｍｏｎｏｃｙｔｏｇｅｎｅｓ简称ＬＭ）的污染调查，结果表明：七类样品中除蔬菜外均检出了致病单核细胞增生性李斯特氏菌。其分离率为：冷饮１．３９％、生肉１．５３％、乳制品０．５２％、熟肉制品０．４７％、乳０．７２％及水产品０．１９％。表明ＬＭ在我国食品中存在污染，有食物中毒的潜在危险。 From 1996 to 1997, 12 provinces in China were surveyed. Totally 3746 samples of seven kinds of foodstuffs in China were investigated for the contamination of Listeria monocytogenes (LM). The results showed that in all seven samples except vegetables Listeria monocytogenes was detected. The separation rate was 1.39% for cold drinks, 1.53% for raw meat, 0.52% for dairy products, 0.47% for cooked meats, 0.72% for milk and 0.19% for aquatic products. This shows that LM is contaminated with food in our country and has the potential danger of food poisoning.