Antibodies to human T-lymphotropic virus type-I in sufferers with tropical spastic paraparesis. 10 out of 17 (59%) sufferers with tropical spastic paraparesis (TSP) had antibodies to human T-lymphotropic virus-I (HTLV-I), as did 5 out of 5 TSP sufferers with systemic signs. Solely 13 out of 303 (4%) controls, made up of blood donors, medical…
