医院感染为入院时无感染表现或不在感染的潜伏期内,入院后获得感染。新生儿,尤其是收入新生儿重症监护病房(NICU)的患儿是医院感染的易感人群。早产及相关免疫缺陷、中心静脉置管、呼吸机 Nosocomial infections were free of infection at admission or were not infected during the incubation period and were admitted after admission. Newborns, especially those who receive NICU, are susceptible to nosocomial infections. Premature delivery and related immunodeficiency, central venous catheterization, ventilator