Abstract
THE human T-cell lymphotropic viruses Type I (HTLV-I) and Type II (HTLV-II) and the bovine leukemia virus, which are members of a family of leukemogenic mammalian retroviruses, share some of the same structural and functional characteristics. HTLV-I has been implicated as the causative agent of adult T-cell leukemia, a T-cell lymphoid malignant disease endemic to southern Japan and the Caribbean area.
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Bovine leukemia virus has been recognized as a cause of specific lymphoid malignant diseases of cattle.
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The role of HTLV-II in human cancer is unclear. This agent is a human retrovirus with a nucleic acid sequence homology to HTLV-I . . .
