The immunotoxicity of cadmium, lead, manganese and chromium on ICR mice were investigated by using the peripheral blood lymphocyte acid α-naphthyl acetate esterase ( PBL-ANAE) and serum hemolysin tests. 采用外周血淋巴细胞酸性α-醋酸萘酯酶(ANAE)和血清溶血素测定法研究了镉、铅、锰和铬对小鼠体内免疫功能的影响。