title: The acquisition of immunity to Histophilus ovis by sheep in nature.
abstract: It was demonstrated that skin wound infection with Histophilus ovis elicits an immune response which can protect a ram against a challenge injection of the same organism into its epididymis.
mesh_terms: D000818:Animals; D004823:Epididymitis / Q000209:etiology / Q000276:immunology / Q000662:veterinary; D006192:Haemophilus Infections / Q000276:immunology / Q000662:veterinary*; D007110:Immunity, Active; D008297:Male; D012756:Sheep / Q000276:immunology; D012757:Sheep Diseases / Q000276:immunology*; D014946:Wound Infection / Q000276:immunology / Q000662:veterinary