title: Immunological strain differences of bovine tick-borne fever agent.
mesh_terms: D000818:Animals; D001179:Arthropod Vectors; D001419:Bacteria / Q000276:immunology*; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D007109:Immunity; D012756:Sheep; D012757:Sheep Diseases / Q000382:microbiology*; D013987:Ticks