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对发生医院感染的老年患者２３９例进行了回顾性调查分析表明：感染好发部位以下呼吸道最高，占总例数的４７．２８％；其次为泌尿道，占３６．８２％。与国内外报道基本相符。调查分析表明：老年病人医院感染危险因素为：自身免疫功能减退，生理防御机制减弱；严重的原发基础疾病引起机体心、肺、肝、肾功能下降；住院日延长，患者群居引起交叉感染；频繁的侵入性诊断及治疗操作破坏了免疫屏障；抗生素的不合理使用引起菌群失调等。并针对老年病人的特点及感染危险因素，制定了综合性防治措施。
Retrospective analysis of 239 elderly patients with nosocomial infections showed that the respiratory tract was the highest, accounting for 47.28% of the total cases, followed by the urinary tract, accounting for 36.82%. Basically consistent with the reports at home and abroad. The investigation and analysis showed that the risk factors of nosocomial infection in elderly patients were: decreased autoimmune function and weakened physiological defense mechanism; severe primary underlying diseases caused the decline of heart, lung, liver and kidney function; prolonged stay in hospital, Frequent invasive diagnosis and treatment of the operation destroyed the immune barrier; irrational use of antibiotics caused flora and other disorders. And for the characteristics of elderly patients and risk factors for infection, developed a comprehensive prevention and treatment measures.