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尽管医院内感染是一个世界性问题,但许多国家对其发生率和患病率心中无数。1980年由微生物学者和控制感染的护士对英国43所医院,18,000患者进行调查,发现每5人中,有1人患过感染症,且半数是在住院期间得病的。以泌尿系感染最多(2.8%);伤口感染次之(1.7%);下呼吸道感染为1.5%。各国情况大抵相同,致病菌主要是革兰氏阴性菌(60.1%)。大多是由原来的内源性细菌所致。
Although nosocomial infections are a worldwide problem, many countries are infiltrated by their incidence and prevalence. In 1980, microbiologists and infection-controlling nurses conducted a survey of 18,000 patients in 43 hospitals in the United Kingdom and found that one out of every five people had had an infectious disease and about half were sick during their stay in hospital. The most urinary tract infection (2.8%); wound infection (1.7%); lower respiratory tract infection was 1.5%. The situation is roughly the same in all countries, and the main pathogens are Gram-negative bacteria (60.1%). Mostly caused by the original endogenous bacteria.