2003～2007年山东省集贸市场食品李斯特氏菌污染状况调查

目的]了解山东省市售食品单核细胞增生李斯特氏菌污染状况。方法]2003-2007年夏秋季,在山东省部分地区集贸市场、超市采样检测。结果]2003-2007年,合计检测各种食品1 502份,检出单增李斯特氏菌133份,检出率为8.85%。单增李斯特氏菌检出率,生鸡肉为9.54%,生羊肉为3.35%,生牛肉为14.47%,生猪肉为24.85%,散装熟肉为6.84%,生食蔬菜为1.34%（P〈0.01）;2003年为5.13%,2004年为3.63%,2005年为19.22%,2006年为3.52%,2007年为12.86%（P〈0.01）;济南市为9.34%,烟台市为3.77%,菏泽市为11.01%,莱芜市为7.51%,德州市为11.20%,潍坊市为4.61%（P〉0.05）。小鼠毒力试验显示检出的菌株均具有较强的致病性。结论]山东省部分地区集贸市场食品摊点销售的食品李斯特氏菌污染较为严重。

Investigation of Listeria Monocytogens Contamination in Shandong Province from 2003 to 2007

Objective]To understand the status of Listeria monoeytogens contamination in food in Shandong province. Methods]The samples from trade markets and supermarkets in some areas in Shandong province were analyzed in Summer and Automn seasons from 2003 to 2007. Results]It was 1 502 samples that were detected from 2003 to 2007. Listeria monocytogens strains were isolated from 133 of 1 502 samples（8.85 %）. The rate of detection of Listeria monoeytogens was 9.54% in uncooked chicken, 3.35% in uncooked mutton, 14.47% in raw beaf, 6.84% in prill cooked meat, and 1.34% in raw vegetables（ P 〈0.01）. The rate of detection of Listeria monocytogens in certain year was 5.13 % in 2003, 3.63% in 2004,19.22% in 2005,3.52% in 2006,and 12.86% in 2007（P 〈0.01）.The rate of detection of Listeria monocytogens in different cities was 9. 34 % in Ji＇nan,3.77% in Yantai,11.01% in Heze,7.51% in Laiwu, 11. 20% in Decheng district of Dezhou, and 4. 61% in Weifang（ P 〉 0. 05）. It was verified that these isolated strains were strong pathogenicity by the toxicity tests in mice. Conclusion]The Listeria monocytogens contamination in food from trade markets in some areas in Shandong province was relatively high.