Retrieval of nematode larvae.
D000018:Abomasum / Q000469:parasitology*; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology; D010029:Ostertagiasis / Q000662:veterinary*; D014251:Trichostrongyloidea; D014252:Trichostrongyloidiasis / Q000662:veterinary*