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对４６例本院老年人院内感染进行了分析。肠道病房有尿路感染及肠道感染；胸外病房以肺部感染为主。多发生在入院７天及术后１～４天后。感染以Ｇ－杆菌及霉菌感染为主，可为几种细菌或细菌霉菌混合感染。结合文献分析院内感染原因，认为感染与老年人患有基础疾病。并有心血管或呼吸道、消化道等多种疾患以及自身免疫力降低使一些条件致病菌成为内源性感染致病菌有关。
46 cases of nosocomial infections in our hospital were analyzed. Intestinal ward have urinary tract infections and intestinal infections; chest ward to pulmonary infection. Occurred more than 7 days after admission and 1 to 4 days after surgery. Infection with G-bacteria and mold-based infection, for several bacterial or bacterial mold mixed infection. Combined with the literature analysis of the causes of nosocomial infection, that the infection and the elderly suffering from underlying diseases. And cardiovascular or respiratory tract, digestive tract and other diseases and reduce their own immunity so that some conditions of pathogenic bacteria become endogenous infection pathogens.