title: Anthelmintic resistance by Haemonchus contortus to ivermectin in Brazil: a preliminary report.
authors.affiliation: Departamento de Parasitologia, Centro Nacional de Pesquisa de Ovinos, Bage, Brazil.
authors.forename: F A
authors.initials: FA
authors.lastname: Echevarria
authors.forename: G N
authors.initials: GN
authors.lastname: Trindade
mesh_terms: D000818:Animals; D001938:Brazil; D004351:Drug Resistance; D005243:Feces / Q000469:parasitology; D006188:Haemonchiasis / Q000188:drug therapy / Q000662:veterinary; D006189:Haemonchus / Q000187:drug effects*; D007559:Ivermectin / Q000494:pharmacology* / Q000627:therapeutic use; D010270:Parasite Egg Count / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000188:drug therapy; D014251:Trichostrongyloidea / Q000187:drug effects*
chemical_list: D007559:Ivermectin