下呼吸道感染是临床的常见病,也是呼吸系疾病中主要死因之一。随着新型药物的广泛应用,呼吸道感染的菌种、致病性及机体对抗生素的敏感性发生了变化,给临床治疗造成了一定的困难。虽然下呼吸道感染病原菌的相关报道较多,但不同地区菌株的分布及病原菌的耐药性有较大差异。为掌 Lower respiratory tract infection is a common clinical disease, but also one of the major causes of death in respiratory diseases. With the wide application of new drugs, the strains of bacteria, pathogenicity and the sensitivity of the body to antibiotics have changed, which has caused some difficulties for clinical treatment. Although there are more reports about pathogens of lower respiratory tract infection, the distribution of strains in different areas and the drug resistance of pathogens are quite different. For the palm