Deltaretrovirus

**Definition:** A genus in the family RETROVIRIDAE consisting of exogenous horizontally-transmitted viruses found in a few groups of mammals. Infections caused by these viruses include human B- or adult T-cell leukemia/lymphoma (LEUKEMIA-LYMPHOMA, T-CELL, ACUTE, HTLV-I-ASSOCIATED), and bovine leukemia (ENZOOTIC BOVINE LEUKOSIS). The type species is LEUKEMIA VIRUS, BOVINE.

**Tree numbers:** - B04.613.807.200 - B04.820.650.200

**Synonyms:** - BLV-HTLV Viruses - HTLV-BLV Viruses