title: Acquired resistance to Ostertagia infection.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology* / Q000473:pathology; D007110:Immunity, Active; D014251:Trichostrongyloidea / Q000254:growth & development; D014252:Trichostrongyloidiasis / Q000276:immunology / Q000473:pathology / Q000662:veterinary*