7例患者均长期使用广谱抗生素，病因有严重的外伤、烫伤、慢性的心肺疾患等；症状均有咳嗽、咳黄绿色腥臭痰、发热；肺部听诊闻及湿音，实验室生化及X线检查提示肺感染。误诊原因：①知识不全面：表现为通过病史、症状等只考虑到常见的几种肺炎而没考虑到本病；②未行正规的疾? Seven patients were long-term use of broad-spectrum antibiotics, the cause of serious trauma, scalds, chronic heart and lung disease, etc .; symptoms are cough, cough yellow green stench sputum, fever; pulmonary auscultation and wet sound, laboratory biochemistry and X Check the line prompted pulmonary infection. Causes of misdiagnosis: ① knowledge is not comprehensive: manifested by history, symptoms, etc. only consider the common several pneumonia and did not take into account the disease; ② not formal disease?