Changes of Antibiotic Resistance and Serotype Distribution of Group B Streptococcus in the Reproductive Tract of Pregnant Women during Perinatal Period

XIE Yun，YANG Liu，QU Lei，WANG Li-bin，MENG Gai-li，YANG Jun-lan

Journal of International Obstetrics and Gynecology . 2019, (6): 657 -660 .