title: Further studies of the effect of selection with levamisole on a benzimidazole resistant population of Ostertagia spp. of sheep.
mesh_terms: D000818:Animals; D000969:Antinematodal Agents / Q000494:pharmacology*; D001562:Benzimidazoles / Q000494:pharmacology*; D004351:Drug Resistance; D007978:Levamisole / Q000494:pharmacology*; D010029:Ostertagiasis / Q000469:parasitology; D010270:Parasite Egg Count; D012756:Sheep / Q000469:parasitology; D014251:Trichostrongyloidea / Q000187:drug effects*
chemical_list: D000969:Antinematodal Agents; D001562:Benzimidazoles; D007978:Levamisole; C011030:oxfendazole