Amplified products of 16 Y.pestis strains of Microtus type by gel electrophoresis method showed that stripes of 13 strains were same, but 3 strains were short of part stripes.

• 结果扩增的13株田鼠型鼠疫耶尔森氏菌在凝胶电泳所显示的条带,除3株菌缺少部分条带外,其余菌株基本相同。