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下呼吸道感染(1ower respiratory tract infections,LR-TI)是指气管、支气管及肺的感染,包括慢性阻塞性肺疾病急性加重、肺炎、支气管-细支气管炎等。在引起LRTI的病原体中,细菌仅占40%~50%[1],但临床上,LRTI抗生素的使用率较高。抗生素的滥用造成大量耐药菌株出现,仅我国每年
1ower respiratory tract infections (LR-TI) refers to the trachea, bronchus and lung infections, including acute exacerbation of chronic obstructive pulmonary disease, pneumonia, bronchi - bronchiolitis and so on. Bacteria account for only 40% to 50% of the pathogens that cause LRTI [1], but clinically, there is a high rate of antibiotic use of LRTI. The abuse of antibiotics has caused a large number of drug-resistant strains to appear, only in my country each year