白血病是以血液循环中白细胞的大量增生为特征的造血系统恶性疾病,主要致病因素为电离辐射、严重病毒感染等。近年来,医学界发现农村儿童白血病的发病率远远高于城镇儿童。经多方调查发现,是由于农药蓄积体内所致。九十年代初,美国加州大学的研究人员对洛杉机267个家庭调查时发现,那些经常在自家庭院中给花喷洒农药的儿童要比家中不使用农药的儿童患白 Leukemia is a hematopoietic malignant disease characterized by massive proliferation of leucocytes in the blood circulation. The main risk factors are ionizing radiation and severe viral infections. In recent years, the medical community has found that the incidence of leukemia in rural children is much higher than that of urban children. After many investigations found that due to pesticide accumulation in vivo. In the early 1990s, researchers at the University of California, Los Angeles investigated a survey of 267 Los Angeles households and found that children who regularly spray flowers in their own courtyards had a higher prevalence than children who did not use pesticides