Eradication of levamisole-resistant Ostertagia.
D000818:Animals; D004351:Drug Resistance; D007978:Levamisole / Q000627:therapeutic use*; D010029:Ostertagiasis / Q000517:prevention & control / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000517:prevention & control*; D014252:Trichostrongyloidiasis / Q000662:veterinary*
D007978:Levamisole