The role of the bursa of Fabricius in immunity against spirochetosis in fowls.
D000818:Animals; D002060:Bursa of Fabricius / Q000276:immunology*; D002645:Chickens; D011201:Poultry Diseases / Q000276:immunology*; D013142:Spirochaeta / Q000276:immunology*; D014211:Treponemal Infections / Q000276:immunology*