Deltaretrovirus
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Through Exogeny
The genus of viruses is known for its propensity to target immune cells and oncogenicity, evident in the names of the four named species. Infection is usually asymptomatic, but inflammation and cancer can develop over time.
Classification
Four species are recognized by the ICTV as of 2023:
- Bovine leukemia virus
- Primate T-lymphotropic virus 1
- Primate T-lymphotropic virus 2
- Primate T-lymphotropic virus 3
Two additional PTLVs are known but not recognized: HTLV-4 (South Cameroon, 2005) and STLV-5 (Mac B43 strain, highly divergent PTLV-1).
In addition, eight endogenous retroviruses identified as Deltaretrovirus are known as of 2019. Two of these were complete enough to show ORFs; the rest only showing long terminal repeats.
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GenusTaxonomic rank above species and below familyFamily (taxonomy)Taxonomic rank between genus and orderEndemismState of species being unique to a locationCladeGroup of a common ancestor and all of their descendantsGenomeAll genetic material of an organismOrder (taxonomy)Taxonomic rank between class and family