1　临床资料　　病人,男性,6 1岁,因反复咳嗽,气喘2 0年余,于2 0 0 3 11 16入院,胸部CT示双肺多发性囊性改变并模糊影,诊断双肺支气管扩张并感染,既往无癫及精神病史。入院后给予抗感染、利尿等对症处理,病情好转,咳嗽、咳痰、胸闷、气促缓解。入院第7天,改用培氟沙星粉针剂( 1 Clinical data Patient, male, 6 1 years old, due to repeated cough, asthma more than 20 years, admitted on 2 0 03 11 16, chest CT showed multiple lung cystic changes and fuzzy shadow to diagnose bilateral bronchiectasis Infection, no previous history of epilepsy and mental illness. Admission to give anti-infective, diuretic and other symptomatic treatment, the condition improved, cough, sputum, chest tightness, shortness of breath ease. The first 7 days admission, use pefloxacin powder (