A total of 946 adults belonging to ten population groups of Uttar Prad
esh and West Bengal were screened for HTLV-I using a gelatin particle
agglutination test. The percentage of seroreactive cases varied from 0
to 5.8 per cent. The overall prevalence of seroreactivity was 2 per c
ent. Of the 19 seroreactive cases, 15 were subjected to Western blot-a
nalysis, none could be confirmed. HTLV-I infection is, therefore, abse
nt in these populations.