[Preventive medicine of adult T-cell leukaemia]

Preventive medicine of adult T cell leukemia (ATL) was discussed from four points of view, namely (1) seroepidemiology, (2) clinical laboratory findings of HTLV-I seropositive and seronegative groups in comparison with those of ATL patients, (3) relationship between genetic polymorphisms of 4 serum proteins and HTLV-I infection/development of ATL and (4) detection of antibodies to HTLV-I in pregnant women and prevention of its mother to child transmission.