The protective effect of purified human immunoglobulin against human T
-cell leukaemia virus type I (HTLV-I), designated ATLIG on HTLV-I infe
ction was examined in cynomolgus monkeys (Macaca fascicularis) as a pr
eclinical study. Passive immunization of ATLIG 24 h before challenging
HTLV-I protected the monkeys from HTLV-I infection. The result sugges
ts that passive immunization of ATLIG could provide safe and sufficien
t protection against HTLV-I infection in humans. (C) 1997 Elsevier Sci
ence Ltd.