链球菌为革兰染色阳性球菌 ,根据其细胞壁C物质的不同分为A、B、C等 18个族。在 193 3年 ,Lancefield报道B族链球菌 (groupBstreptococci,GBS)能引起多种疾病。对GBS感染和妊娠之间关系的大量研究开始于 2 0世纪 70年代 ,研究发现GBS与围生期母儿感染有密切关系。1　妊娠期GBS Streptococcus is Gram-positive cocci, according to their cell wall C material is divided into A, B, C and other 18 families. In 193 3, Lancefield reported that group B streptococci (GBS) causes a variety of diseases. A large number of studies on the relationship between GBS infection and pregnancy started in the 1970s. The study found that GBS is closely related to perinatal maternal and child infections. 1 GBS during pregnancy