title: Preface.
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000494:pharmacology*; D004351:Drug Resistance; D006188:Haemonchiasis / Q000469:parasitology / Q000517:prevention & control / Q000662:veterinary*; D006189:Haemonchus / Q000187:drug effects / Q000502:physiology*; D012418:Ruminants / Q000469:parasitology*
chemical_list: D000871:Anthelmintics