Purpose In order to develop an economic and effective method for isolation and purification of the capsular polysaccharide(CPS) from group B streptococcus(GBS).

• 目的为提高荚膜多糖抗原得率,降低荚膜多糖中残余蛋白质含量和核酸含量,提高荚膜多糖抗原纯度,优化B群链球菌荚膜多糖的提取纯化工艺条件。