作者已发现接触职业性膀胱癌致癌物4,4′-二氨基联苯及β-萘胺(AA)的工人,其末梢血中淋巴细胞减少,但NK细胞除外。作者通过对接触AA工人淋巴细胞数及淋巴细胞亚族的直接测定又发现CD_4阳性淋巴细胞减少。以某化工厂接触AA 52名男性现职工人及退修工人(53～74岁)为研究对象,以33名 The authors have found that workers exposed to occupational bladder cancer carcinogens 4,4’-diaminodiphenyl and β-naphthylamine (AA) have reduced peripheral blood lymphocytes, with the exception of NK cells. The authors also found that CD 4-positive lymphocytopenia was found by direct measurement of lymphocyte numbers and lymphocyte subsets in AA-exposed workers. A chemical plant contact AA 52 male current workers and retreat workers (53 ~ 74 years old) as the research object, with 33