title: The effect of selection with levamisole on benzimidazole resistance in Ostertagia spp. of sheep.
mesh_terms: D000818:Animals; D001562:Benzimidazoles / Q000494:pharmacology*; D004351:Drug Resistance; D007978:Levamisole / Q000494:pharmacology*; D010029:Ostertagiasis / Q000469:parasitology / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*; D014251:Trichostrongyloidea / Q000187:drug effects*; D014252:Trichostrongyloidiasis / Q000662:veterinary*
chemical_list: D001562:Benzimidazoles; D007978:Levamisole