An attempt to demonstrate passive resistance in lambs to three species of gastro-intestinal nematodes as a result of sucking the ewe.
D000818:Animals; D000831:Animals, Newborn; D003126:Colostrum / Q000276:immunology*; D005260:Female; D007112:Immunity, Maternally-Acquired; D007774:Lactation; D009349:Nematode Infections / Q000276:immunology*; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology*; D014252:Trichostrongyloidiasis / Q000276:immunology; D014427:Twins