title: Substitution of egg yolk for serum in indirect fluorescence assay for Rous sarcoma virus antibody.
mesh_terms: D001358:Avian Sarcoma Viruses / Q000276:immunology*; D004530:Egg Yolk; D005260:Female; D005455:Fluorescent Antibody Technique; D007106:Immune Sera
chemical_list: D007106:Immune Sera