According to extracellular proteins structure on the gel, 18 strains could be divided into 3 groups. the results indicated that a well corresponding relationship between serotypes and ECPs groups.

• 根据凝胶上主要蛋白条带在不同菌株中的分布,可初步将其中的18 株细菌分为3 个胞外产物ECPs蛋白型,该ECPs蛋白型显示与血清型有一定的对应关系。