title: Comparative morphological studies of the allergic reactions of young and old animals.
mesh_terms: D000367:Age Factors; D000707:Anaphylaxis / Q000473:pathology; D000818:Animals; D000917:Antibody Formation; D001183:Arthus Reaction / Q000473:pathology; D001327:Autoimmune Diseases / Q000473:pathology; D001808:Blood Vessels / Q000473:pathology; D006967:Hypersensitivity / Q000276:immunology / Q000473:pathology*; D008642:Mesenteric Veins / Q000473:pathology; D009393:Nephritis / Q000473:pathology; D011817:Rabbits; D051381:Rats; D012713:Serum Sickness / Q000473:pathology; D014376:Tuberculosis / Q000473:pathology