恶性肿瘤病人由于正常组织结构破坏、免疫抑制疗法(药物和/或放射)、继发免疫力低下、粒细胞减少等原因,易发生微生物感染,且感染的症状往往缺如或不典型。疑有感染时,要根据局部主要菌群及其敏感性立即治疗,可凭经验选用两种协同性药物(如青霉素+氨基糖甙类),或单用新型青霉素与头孢霉素类药物。三种以上药物合用无明显优点。粒细胞低者,如合并两种药物治疗有效,但粒细胞数持 Malignant tumor patients are prone to microbial infection due to the destruction of normal tissue structure, immunosuppressive therapy (drugs and / or radiation), secondary immunity and neutropenia, and the symptoms of infection are often absent or atypical. Suspected infection, according to the local main flora and its sensitivity to immediate treatment, empirically choose two kinds of synergistic drugs (such as penicillin + aminoglycosides), or single new penicillin and cephalosporins drugs. Three kinds of drugs combined no obvious advantages. Low granulocyte, such as the combination of two drugs effective, but holding the number of granulocytes