Reticuloendotheliosis Viruses, Avian

Avian Reticuloendotheliosis Virus Group; Avian Reticuloendotheliosis Virus; Chick syncytial viruses; Reticuloendotheliosis Virus, Avian; Virus, Avian Reticuloendotheliosis; Viruses, Avian Reticuloendotheliosis; syncytial virus, Chick
A group of viruses in the genus GAMMARETROVIRUS comprising a few isolates from birds, with no known corresponding endogenous relatives.