Retroviruses type d
retroviruses, type d
A genus of the family retroviridae consisting of oncogenic exogenous retroviruses that contain type d particles. They include the type species, mason-pfiser monkey virus, isolated from mammary carcinoma and normal tissues in rhesus monkeys, and several other serotypes of simian type d retroviruses (retroviruses type d, simian), all of which cause simian aids (saids) and other malignancies. The permanent human fibroblast virus (pmfv) is also type d. The core of the type d viruses is the intracytoplasmic type a particle and its mechanism of budding from the cell membrane is similar to the type b oncoviruses.