title: Some aspects of resistance to animal and human helminths. Acquired resistance and its effect on populations of Ostertagia ostertagi.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology*; D004196:Disease Outbreaks; D006801:Humans; D009348:Nematoda / Q000254:growth & development; D009349:Nematode Infections / Q000276:immunology* / Q000662:veterinary*