title: The activity of 22, 23-dihydroavermectin B1 against the pig louse, Haematopinus suis.
mesh_terms: D000818:Animals; D007559:Ivermectin; D007783:Lactones / Q000627:therapeutic use*; D010373:Lice Infestations / Q000188:drug therapy / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000188:drug therapy*
chemical_list: D007783:Lactones; D007559:Ivermectin