title: PCA reactions in adult specific pathogen-free chickens.
mesh_terms: D000367:Age Factors; D000818:Animals; D000941:Antigens; D002417:Cattle; D002645:Chickens; D005856:Germ-Free Life; D007106:Immune Sera; D010323:Passive Cutaneous Anaphylaxis; D005719:gamma-Globulins
chemical_list: D000941:Antigens; D007106:Immune Sera; D005719:gamma-Globulins