: an HTLV (species Primate T-lymphotropic virus 1 of the genus Deltaretrovirus) that is found in association with adult T-cell leukemia and a progressive paralyzing myelopathy

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“HTLV-I.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/HTLV-I. Accessed 9 Mar. 2025.

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