当今大多数发达国家感染性疾病还是主要的死亡原因。随着病菌理论的研究以及防腐、抗腐与抗菌治疗,免疫注射和公共卫生措施的实行,感染作为缩短生命的过程,其作用已大大减少。但在老年人群中,感染性疾病就其常见性、发病率及死亡率而言依然是临床主要问题。老年患者感染有其独特性,疾病的临床表现多不典型或无症状,感染诊断缺乏精确性而又很难取得体弱老人临床标本来确定其特有的 In most developed countries today, infectious diseases are the leading cause of death. With the study of germ theory and the implementation of antisepsis, antisepsis and antibacterial treatment, immunization and public health measures, infection has been greatly reduced as a life-shortening process. In the elderly, however, infectious diseases remain a major clinical problem in terms of their prevalence, morbidity and mortality. Elderly patients have their own unique characteristics of infection, the clinical manifestations of the disease or atypical asymptomatic, the lack of accuracy of the diagnosis of infection and difficult to obtain clinical samples of frail elderly to determine its unique