感染是急性白血病常见并发症之一,也是致死的一个重要原因。尤其近年来大剂量联合化疗使机体各种防御机能遭到极大的破坏,骨髓造血功能障碍,周围血中性粒细胞严重缺乏,细胞和体液免疫机制受损,各种感染频繁发生。另外,肾上腺皮质激素和多种抗生素的应用,造成菌群失调和双重感染。因此,及时而有效地防治感染性并发症将明显有 Infection is one of the common complications of acute leukemia and an important cause of death. Especially in recent years, large doses of combined chemotherapy have greatly damaged the various defense functions of the body, hematopoietic disorders of the bone marrow, severe lack of peripheral blood neutrophils, impaired cellular and humoral immune mechanisms, and frequent occurrence of various infections. In addition, the adrenal cortex hormones and a variety of antibiotics, resulting in flora and double infection. Therefore, the timely and effective prevention and treatment of infectious complications will be obvious