小儿急性白血病时由于白血病本身和强化疗法,使机体抗感染能力降低,即处于免疫无能(Immunocompromised)状态,对于条件性感染的易感性比正常人增高很多倍.因此小儿急性白血病时的感染是最常见的合并症和致死原因,直接影响提高儿童急性白血病的五年生存率和临床治愈率.根据国内外统计急性白血病半数以上继发感 Infantile acute leukemia due to leukemia itself and intensive chemotherapy, the body’s ability to reduce the anti-infective, that is immune incompetence (Immunocompromised), the susceptibility to opportunistic infections many times higher than normal, so children with acute leukemia infection is the most Common complications and causes of death, a direct impact on raising the five-year survival rate of children with acute leukemia and clinical cure rate.According to statistics at home and abroad more than half of acute leukemia secondary sense