Primate T-lymphotropic virus

Primate T-lymphotropic virus
a micrograph showing both Human T-lymphotropic virus 1 and HIV
Scientific classification
(unranked): Virus
Realm: Riboviria
Kingdom: Pararnavirae
Phylum: Artverviricota
Class: Revtraviricetes
Order: Ortervirales
Family: Retroviridae
Subfamily: Orthoretrovirinae
Genus: Deltaretrovirus
Groups included

The primate T-lymphotropic viruses (PTLVs) are a group of retroviruses that infect primates, using their lymphocytes to reproduce. The ones that infect humans are known as human T-lymphotropic virus (HTLV), and the ones that infect Old World monkeys are called simian T-lymphotropic viruses (STLVs). PTLVs are named for their ability to cause adult T-cell leukemia/lymphoma, but in the case of HTLV-1 it can also cause a demyelinating disease called tropical spastic paraparesis.[2] On the other hand, newer PTLVs are simply placed into the group by similarity and their connection to human disease remains unclear.[1]

HTLVs have evolved from STLVs by interspecies transmission. Within each species of PTLV, the HTLV is more similar to its cognate STLV than to the other HTLVs.[1] There are currently three species of PTLVs recognized by the ICTV (P/H/STLV-1, -2, -3), plus two that are reported but unrecognized (HTLV-4, STLV-5).[1] The first known, and still most medically important PTLV is HTLV-1, discovered in 1980.[3]

HTLVs belong to the genus Deltaretrovirus. The only other recognized species in the genus is Bovine leukemia virus, an economically-important cattle pathogen. As its name suggests, this virus causes leukemia in cows.[4]

  1. ^ a b c d e Cite error: The named reference pmid21994771 was invoked but never defined (see the help page).
  2. ^ "Recommendations for counseling persons infected with human T-lymphotrophic virus, types I and II. Centers for Disease Control and Prevention and U.S. Public Health Service Working Group". MMWR Recomm Rep. 42 (RR-9): 1–13. 1993. PMID 8393133. Archived from the original on 2017-08-29. Retrieved 2017-09-09.
  3. ^ Verdonck, Kristien; González, Elsa; Van Dooren, Sonia; Vandamme, Anne-Mieke; Vanham, Guido; Gotuzzo, Eduardo (April 2007). "Human T-lymphotropic virus 1: recent knowledge about an ancient infection". The Lancet Infectious Diseases. 7 (4): 266–281. doi:10.1016/S1473-3099(07)70081-6. PMID 17376384.
  4. ^ Hron, T; Elleder, D; Gifford, RJ (27 November 2019). "Deltaretroviruses have circulated since at least the Paleogene and infected a broad range of mammalian species". Retrovirology. 16 (1): 33. doi:10.1186/s12977-019-0495-9. PMC 6882180. PMID 31775783.
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