当前,随着化疗的进展,急性白血病的缓解率与生存期得到了显著的改善。但强烈化疗常可引起或加重患者的中性粒细胞减少,从而容易引起严重的感染而危及生命。因此,感染仍是目前急性白血病患者死亡的主要原因之一;而其中尤以革兰氏阴性杆菌引起的感染最为常见,病情也最为严重。特别是处于粒细胞减少期的患者更易发生感染,应用抗菌素治疗也难获预期疗效。故早期发现与及时处理 At present, with the progress of chemotherapy, acute leukemia remission rate and survival have been significantly improved. However, strong chemotherapy can often cause or aggravate the patient’s neutropenia, which can easily lead to serious infections and life-threatening. Therefore, the infection is still one of the major causes of death in patients with acute leukemia; especially Gram-negative bacteria caused the most common infection, the most serious condition. Especially in patients with neutropenia more susceptible to infection, the application of antibiotic therapy is difficult to expect the effect. Therefore, early detection and timely treatment