title: Reduction in virulence of Babesia bovis due to rapid passage in splenectomized cattle.
mesh_terms: D000818:Animals; D001403:Babesia / Q000276:immunology*; D002417:Cattle; D013154:Spleen / Q000276:immunology*; D013156:Splenectomy; D014613:Vaccines, Attenuated
chemical_list: D014613:Vaccines, Attenuated