title: Further studies on antigenic changes in Trypanosoma lewisi.
mesh_terms: D000818:Animals; D000941:Antigens / Q000032:analysis*; D007106:Immune Sera; D005779:Immunodiffusion; D011817:Rabbits; D051381:Rats; D014345:Trypanosoma / Q000254:growth & development / Q000276:immunology*; D014352:Trypanosomiasis / Q000382:microbiology
chemical_list: D000941:Antigens; D007106:Immune Sera