呼吸道感染是临床常见病,早期合理地选择药物是快速、有效治疗的关键。但随着社会用药的普及和抗生素不规范使用的增多,病原体变迁及耐药菌株的增加,促使在临床治疗上需要选择新的用药。新一代喹诺酮左氧氟沙星的临床应用,拓宽了治疗呼吸道感染的用药选择。左氧氟沙星具有抗菌 Respiratory tract infection is a common clinical disease, the early rational choice of drugs is the key to rapid and effective treatment. However, with the popularization of social medicine and the non-standard use of antibiotics, the change of pathogens and the increase of drug-resistant strains have prompted the need to select new drugs for clinical treatment. A new generation of quinolone levofloxacin clinical application, broaden the treatment options for respiratory tract infection. Levofloxacin antibacterial