title: Natural and acquired antibodies to Plasmodium lophurae in intact and bursaless chickens. I. Agglutination and passive  immunity studies.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002060:Bursa of Fabricius; D002645:Chickens / Q000276:immunology*; D005455:Fluorescent Antibody Technique; D007106:Immune Sera; D007112:Immunity, Maternally-Acquired; D008289:Malaria, Avian / Q000276:immunology*; D008297:Male; D011201:Poultry Diseases / Q000276:immunology*
chemical_list: D007106:Immune Sera