Objective To identify Neisseria meningitidis serogroup B strain by PCR amplification,enzyme digestion and sequence alignment.Methods A total of 15 strains obtained from differert resources were preliminary tested by serological silde agglutination method,and then identified by PCR amplification,enzyme digestion and sequence alignment,namely,the sialyltransferase(Sia D) gene was amplified by PCR.Meanwhile,the 15 PCR amplification products were enzyme-digested and compared with the original sequence of sia D ...