title: Production of pathogen free avian cell substrate for production of vaccines.
mesh_terms: D001355:Alpharetrovirus / Q000254:growth & development; D000818:Animals; D002460:Cell Line; D002642:Chick Embryo; D002645:Chickens; D014765:Viral Vaccines / Q000302:isolation & purification*; D014776:Virus Cultivation
chemical_list: D014765:Viral Vaccines