医院环境中含有很多致病力较强的菌群。病人入院时,其本身抗感染能力往往已受影响,如再接受某些特种检查或手术治疗,则可进一步削弱其本身防御机理;因此,原先无任何感染,也不处在感染潜伏期的外科病人很容易在住院期间获得感染,这就是外科病人的医院内感染。最常见者为泌尿系感染、伤口感染、 Hospital environment contains many virulent bacteria. When patients are admitted to the hospital, their own anti-infective ability is often affected. If they undergo some special tests or surgery, their own defensive mechanism can be further weakened. Therefore, surgical patients without any infection or latent infection period It is easy to get infected during hospitalization, which is a nosocomial infection of surgical patients. The most common urinary tract infections, wound infections,