近年来,由于抗生素的不合理使用,医院里产生了大量耐药菌株;侵入性技术日益广泛的应用,造成人体防御机制损伤;免疫抑制剂、放疗、化疗等可明显损伤病人的免疫力。先进医疗技术虽然能挽救大量病人的生命,也会造成病人免疫力低下,引起医院感染。医院感染又称医院内获得性感染,它 In recent years, due to the irrational use of antibiotics, a large number of drug-resistant strains have been produced in hospitals; invasive techniques have become more widely used, causing damage to the body’s defense mechanisms; immunosuppressive agents, radiotherapy, and chemotherapy can significantly impair patient immunity. Although advanced medical technology can save the lives of a large number of patients, it can also cause the patient’s immunity to be low and cause nosocomial infections. Hospital infection, also known as hospital acquired infection, it