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本文将我院１９８９年１～１９９２年１２月住院病人中痰普通细菌培养阳性、医院内下呼吸道感染的１６３例病人，分成老年组与非老年组进行分析比较。两组病人中Ｇ－杆菌感染（８１．６％）明显高于Ｇ＋球菌感染（１８．４％）。老年组绿脓假单胞杆菌感染尤为突出３１．３％；老年组Ｇ－杆菌感染对第三代头孢菌素、喹诺酮类抗生素、多粘菌素、庆大霉素、妥布霉素的敏感性达７４．３％～１００％，而对氨苄青霉素、氯霉素、链霉素的耐药性高达８０．６％～９２％。老年组病程迁延，临床表现为胸闷较多占４６．９％，比非老年组高，有糖尿病、高血压、冠心病等合并症者（３７．５％），比非老年组显著增高，治疗也较困难
In this paper, from January 1989 to December 1992 in our hospital inpatients sputum common bacterial culture positive, lower respiratory tract infection in the hospital 163 patients were divided into the elderly group and the non-elderly group for analysis and comparison. G-bacilli infection (81.6%) was significantly higher in both groups than in G + coccus (18.4%). The elderly group of Pseudomonas aeruginosa infection was particularly prominent 31.3%; elderly G-bacilli infection on the third generation cephalosporins, quinolone antibiotics, polymyxin, gentamicin, tobramycin sensitive The rate of 74.3% to 100%, while the ampicillin, chloramphenicol, streptomycin resistance as high as 80.6% to 92%. The course of disease in the elderly group was prolonged. The clinical manifestations were chest tightness (46.9%), higher than those in the non-elderly group (37.5%) with diabetes, hypertension, coronary heart disease and other complications, significantly higher than those in the non-elderly group Also more difficult