近年来，Ｇ－杆菌致病菌已成为老年院内肺部感染之主要致病菌，且耐药菌株不断增加。为此，我们分析了１４２例老年人院内肺部感染之Ｇ一杆菌致病及药物敏感情况，现报告如下。１材料与方法１．１病例选择１４２例来自我院１９９５年７月～１９９８年７月住院患者，均符合国家 In recent years, G-bacilli pathogens have become the main pathogenic bacteria in elderly patients with pulmonary infection, and drug-resistant strains continue to increase. To this end, we analyzed the pathogenic and drug susceptibility of G-bacilli of 142 elderly patients with nosocomial pulmonary infections, are as follows. 1 Materials and Methods 1.1 Case Selection 142 cases from our hospital from July 1995 to July 1998 inpatients, are in line with the state