title: A study of the antigenic relationships of isolates of Trypanosoma brucei collected from a herd  of cattle kept in one locality for five years.
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D000941:Antigens / Q000032:analysis*; D002417:Cattle; D002999:Clone Cells; D007106:Immune Sera; D051379:Mice; D009500:Neutralization Tests; D009549:Nigeria; D011817:Rabbits; D051381:Rats; D013997:Time Factors; D014345:Trypanosoma / Q000276:immunology*; D014354:Trypanosomiasis, Bovine / Q000276:immunology*
chemical_list: D000941:Antigens; D007106:Immune Sera