Development of cross immunity in lambs by exposure to bovine gastrointestinal parasites.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology*; D007411:Intestinal Diseases, Parasitic / Q000276:immunology / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology*; D013272:Stomach Diseases / Q000276:immunology / Q000662:veterinary*