Journal
AUSTRALIAN VETERINARY JOURNAL
Volume 93, Issue 9, Pages 305-307Publisher
WILEY-BLACKWELL
DOI: 10.1111/avj.12352
Keywords
ivermectin; macrocyclic lactone; Parascaris equorum; resistance
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BackgroundThere 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. Methods and ResultsA 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%. ConclusionThe case highlights the need to review current worm control strategies, especially for young horses.
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