a group of viruses (subfamily Oncovirinae, family Retroviridae) that are lymphotropic with a selective affinity for the helper/inducer cell subset of T lymphocytes and that are associated with adult T-cell leukemia and lymphoma, part of a group of viruses (subfamily Lentivirinae, family Retroviridae) that are lymphotropic with a selective affinity for the helper/inducer cell subset of T lymphocytes and that are associated with adult T-cell leukemia and lymphoma., HTLV - inimese retroviirus, millest HTLV-I võib tekitada täiskasvanud inimese ägedat leukeemiat ja HTLV-II retikuloendoteliaalleukeemiat (HI-viirust nimetati varem HTLV-III viiruseks)