革兰氏阴性杆菌的鉴别特征是具有一双层细胞壁，虽然所有细菌都有一细胞内膜，革兰氏阴性杆菌还有一个均一的外膜。
目的评价国产注射用头孢他啶治疗临床革兰氏阴性杆菌感染的有效性和安全性。
Objective To evaluate the efficacy and safety of domestic ceftazidime inject in the treatment of Gram negative bacillus infection in clinic.
仅有几项研究提供了有关病原体数据并且强调了革兰氏阴性杆菌的重要性，特别是在手术部位感染和呼吸机相关肺炎研究中提供了上述数据。
Data on causative pathogens were available from a few studies only and highlighted the importance of Gram-negative rods, particularly in surgical site infection and ventilator-associated pneumonia.
大部分感染是由革兰氏阴性杆菌导致的。
Most infections were caused by gram-negative aerobic bacteria.
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