Among the used antibacterial drugs,the expending amount of cephalosporins was the largest,the second was nitroimidazole derivatives,and the third was aminoglycosides.

• 使用最多是头孢菌素类、硝基咪唑类、氨基糖苷类,常用联合用药方式有头孢菌素类+硝基咪唑类、头孢菌素类+氨基糖苷类。