title: The effect of syringe and cyclical passage on antigenic variants of Trypanosoma vivax.
mesh_terms: D000818:Animals; D000941:Antigens; D002417:Cattle; D003165:Complement System Proteins; D014644:Genetic Variation; D005827:Genetics, Microbial; D007106:Immune Sera; D007125:Immunogenetics; D007158:Immunologic Techniques; D009584:Nitrogen; D012756:Sheep; D013594:Syringes; D014345:Trypanosoma / Q000276:immunology*; D014370:Tsetse Flies
chemical_list: D000941:Antigens; D007106:Immune Sera; D003165:Complement System Proteins; D009584:Nitrogen