关键词: 贝莱斯芽孢杆菌； 鉴定； 抑菌试验

Abstract: In this study,sequencing identification，drug sensitivity testing，and antibacterial assays were conducted on six Bacillus velezensis strains isolated from diverse sources. The results indicated that the 16S rDNA sequences of these six isolates were positioned within the same genetic evolutionary branch of Bacillus velezensis，and sensitivity to seven selected antimicrobial drugs was exhibited. Bacteriostatic effects against both Staphylococcus aureus and Escherichia coli were demonstrated for the six strains and their metabolites. The bacteriostatic intensity of the samples followed the order of Bacillus velezensis liquid, supernatant，and filtrate.

Key words: Bacillus velezensis； Identification； Antibacterial test