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对感染抵抗力低下的宿主或广义的免疫功能不全的宿主,由弱毒菌、平时非致病菌或条件致病菌引起的感染性疾病叫条件性感染。当初使用菌交替症名称时,抗生素种类少、抗菌谱窄,较少应用类固醇激素、细胞毒性药物和代谢拮抗剂。今天,特别是细胞毒性药物、类固醇激素和广谱抗生素的广泛持续应用,条件性感染这一名称应变而生。抗感染能力的低下原因是基础病本身、治疗或两者共同诱发的。主要的基础病有:恶性淋巴瘤、白血
Infection-resistant hosts or in generalized immunocompromised hosts, infectious diseases caused by weak toxins, usually non-pathogenic bacteria or opportunistic pathogens are called opportunistic infections. Originally used when the name of bacterial Alternaria, antibiotic species less antibacterial spectrum narrow, less use of steroid hormones, cytotoxic drugs and metabolic antagonists. Today, with the widespread and continuing use of cytotoxic drugs, steroid hormones and broad-spectrum antibiotics in particular, the term conditional infection is a governed strain. Anti-infective ability of the underlying cause of underlying disease, treatment or both induced. The main underlying diseases are: malignant lymphoma, white blood