中文摘要：

为了解上海市动物性食品中单增李斯特菌的进化情况和群体遗传学特征，本研究采用MLST法和eBURST软件对33株分离株进行分子分型及进化树分析。结果共分成8个型别，并且33株单增李斯特菌之间遗传相关性不是很大。分为4个进化谱系：ST11和ST196为一个进化谱系，ST9、ST8和ST155为一个进化谱系，ST87和ST277/589为一个进化谱系，所占比例最多的ST121单独一个进化谱系。

英文摘要：

In order to investigate into the evolution and population genetics of Listeria monocytogenes from animal foods in Shanghai, MLST method was used for molecular typing of 33 isolated strains. These strains were divided into eight types based on MLST typing. In phylogenetic analysis, these strains showed a little genetic correlation and were divided into four groups. Group 1 was represented by ST11 and ST196, group 2 by ST9 ST8 and ST155, group 3 by ST87 and ST277/589, and group 4 by ST121.