The partial bla gene of ESBL producing isolates and their transcojugants were detected by PCR using universal primers for TEM, SHV, CTX-M-1group, Toho-1group, CTX-M-13group respectively.

• TEM、SHV、CTX M 1组、CTX M 13组、Toho 1组通用引物检测产ESBL菌株及其转移接合子 ;