AI Article Synopsis
- Widespread anthelmintic resistance in small ruminants is significantly impacting the profitability of the meat and wool industry, particularly in Australia.
- The study focuses on a region in Victoria, where resistance to anthelmintics is notably high at 71%, with varying drug effectiveness among farms.
- Older drugs show more resistance compared to newer treatments, highlighting the need for more regional studies to assess and address this growing threat to worm control.
Article Abstract
Widespread anthelmintic resistance in small ruminants is a constraint on the profitability of the meat/wool industry. Limited published data is available on the prevalence and efficacy of anthelmintics, particularly in Australia where parasites affecting ruminant systems vary greatly between geographic regions. This paper reports on the anthelmintic resistance status in a temperate region of Victoria, Australia, a major sheep producing state largely affected by Trichostrongylus species and Teladorsagia circumcincta. The prevalence of anthelmintic resistance to any product was high (71%), with farms reporting varying levels of drug efficacies (21-100%). Resistance to older chemical groups (i.e. fenbendazole and levamisole) and single active macrocyclic lactone treatments was higher than newer chemical groups and combination treatments. This report provides clarity on anthelmintic resistance in the temperate region of Victoria and more importantly suggests that more comprehensive, regional specific anthelmintic resistance studies are required to understand the real level of chemical resistance threatening the effective control of worms.
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| http://dx.doi.org/10.1016/j.vprsr.2019.100313 | DOI Listing |
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