title: Mechanisms for congenital transmission of avian leukosis virus.
mesh_terms: D000818:Animals; D001354:Avian Leukosis Virus / Q000502:physiology*; D002642:Chick Embryo; D003582:Cytogenetics; D007275:Injections, Intravenous; D008854:Microscopy, Electron; D011200:Poultry