对肺部感染作出诊断并不难,但准确的病原学的确定往往不易。目前临床不甚追究病原学诊断而采用多种或广谱抗生素的办法是不可取的,不仅抗生素的选用针对性不强,以致疗效不满意和经济上的浪费,且易招致微生态平衡的紊乱。对下呼吸道感染性疾病的病原学诊断。痰培养、即使采取痰块冲洗法,均因受到上呼吸道细 Diagnosis of pulmonary infection is not difficult, but accurate etiology is often not easy to determine. Clinically, the current clinical diagnosis of etiology and the use of multiple or broad-spectrum antibiotics approach is not desirable, not only the selection of antibiotics is not targeted, resulting in dissatisfaction with the efficacy and economic waste, and easily lead to micro-ecological balance disorders . Etiological diagnosis of lower respiratory tract infectious diseases. Sputum culture, even taking phlegm flushing method, are subject to the upper respiratory tract fine