The introduction of Nematodirus battus (Crofton and Thomas, 1951) into a new environment.
D000818:Animals; D000831:Animals, Newborn; D000871:Anthelmintics / Q000627:therapeutic use; D002980:Climate; D004463:Ecology; D005243:Feces / Q000032:analysis; D005260:Female; D008297:Male; D009348:Nematoda / Q000302:isolation & purification; D009349:Nematode Infections / Q000188:drug therapy / Q000453:epidemiology / Q000662:veterinary*; D009664:Norway; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*
D000871:Anthelmintics