中文摘要：

对分离自酸马奶酒中的两株产抑菌物质的乳酸菌BY-3—2、SQ-3—2进行分离鉴定及系统发育分析，以更准确地判定其属种。对菌株进行生理、生化特性鉴定及其16SrDNA序列分析。结果表明：菌株BY-3-2、SQ-3-2的生理、生化特性符合肠球菌属特征，其中BY-3-2菌株符合E．faecium的特征；SQ-3—2菌株符合E．durans的特征。通过16S rDNA序列进行系统发育分析，结果与生理生化鉴定相一致。

英文摘要：

In order to identify genus and species of two stains of lactic acid bacteria with antibacterial functions, BY-3-2 and SQ-3-2 were separated from Koumiss. Their physiological and biochemical characteristics and 16S rDNA sequence were analyzed. Results indicated that physiological and biochemical characteristics of BY-3-2 and SQ-3-2 were the same as those of Enterococcus. Moreover, strain BY-3-2 had the characteristics of E.faecium, and SQ-3-2 had the characteristics orE. durans, which was also supported by 16S rDNA sequence analysis.