title: Suspected ivermectin resistance in a south-east Queensland Parascaris equorum population.
abstract: BACKGROUND
  There have been several international reports of macrocyclic lactone (ML)-resistant Parascaris equorum over the past decade, but the resistance status of Australian P. equorum populations is largely unknown. A case of apparent reduced efficacy of ivermectin against P. equorum in Australia was investigated.
  
  
  RESULTS
  A faecal egg count reduction test carried out on a group of weanling foals in south-east Queensland showed the efficacy of ivermectin to be 65%.
  
  
  CONCLUSIONS
  The case highlights the need to review current worm control strategies, especially for young horses.
authors: School of Veterinary Science, University of Queensland, Gatton, Queensland, Australia. a.beasley@uq.edu.au.
authors: A
authors: A
authors: Beasley
authors: School of Veterinary Science, University of Queensland, Gatton, Queensland, Australia.
authors: G
authors: G
authors: Coleman
authors: CSIRO Agriculture Flagship, St Lucia, Queensland, Australia.
authors: A C
authors: AC
authors: Kotze
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000627:therapeutic use*; D017191:Ascaridida Infections / Q000188:drug therapy / Q000469:parasitology / Q000662:veterinary*; D001199:Ascaridoidea / Q000187:drug effects*; D004351:Drug Resistance; D006734:Horse Diseases / Q000188:drug therapy* / Q000469:parasitology; D006736:Horses; D007559:Ivermectin / Q000627:therapeutic use*; D011793:Queensland
chemical_list: D000871:Anthelmintics; D007559:Ivermectin
keywords: Parascaris equorum; ivermectin; macrocyclic lactone; resistance