[JAMA 254(20): 2951,1985(英)] 美国急重症医院每年约发生2.1百万人次感染;而护理院每年约发生1.5百万人次感染,其感染发生率与医院获得性感染相差无几,约5％～10％。护理院的老年病人之所以容易感染,是因为与年令有关的免疫力下降和各种医学问题(如癌症、糖尿病、末梢血管疾病、失 [JAMA 254 (20): 2951, 1985 (英)] The U.S. Critical Care Hospital is responsible for about 2.1 million infections every year, while the nursing home is responsible for about 1.5 million infections annually, and its incidence is almost as high as that for hospital-acquired infections , About 5% ~ 10%. The reason why elderly patients in nursing homes are susceptible to infections is the decline in immunity associated with the decree and various medical problems such as cancer, diabetes, peripheral vascular disease,