Long-term serological outcome of infants who received frozen-thawed milk from human T-lymphotropic virus type-I positive mothers.

Aim: Human T-lymphotropic virus type-I (HTLV-I) infection occurs via mothers' milk during feeding. However, freeze-thaw processing can eliminate the infectivity of the mother's milk of HTLV-I carriers.

Methods: A long-term follow-up survey was conducted to investigate the HTLV-I infectivity of frozen-thawed mothers' milk among infants whose mothers were HTLV-I seropositive.