Infections due to gram-negatie bacteria including Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae hae become common in critically ill patients in many parts of the world.

• 在世界许多地方，危重病人身上由于鲍氏不动杆菌、铜绿假单孢菌、肺炎克雷白杆菌等革兰氏阴性菌造成的感染已经很常见。