Infection of human embryo cells with avian sarcoma virus B77 in vitro

Human embryo cells were infected with avian sarcoma virus B77--Hu(B77). The virus genome was detected in the Hu(B77) cells during subsequent cell passages in the uncloned cells as well as in single-cell clones. Despite the presence of the virus genome in cells, the growth properties did not differ from uninfected cells. The Hu(B77) cells did not reveal the transformed phenotype in vitro.