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Anthelmintic resistance in India

B S Gill

    Veterinary Parasitology
    |May 1, 1996
    PubMed
    Summary
    This summary is machine-generated.

    Gastrointestinal nematode resistance to albendazole and levamisole is widespread in sheep farms, with significant reductions in efficacy. Ivermectin remained effective in controlling parasite egg counts in this study.

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    Area of Science:

    • Veterinary Parasitology
    • Animal Science
    • Sheep Production

    Background:

    • Gastrointestinal nematodes are a significant threat to sheep health and productivity worldwide.
    • Anthelmintic resistance in nematodes poses a major challenge to effective parasite control in sheep farming.
    • Commonly used anthelmintics include albendazole, levamisole, and ivermectin.

    Purpose of the Study:

    • To investigate the prevalence of anthelmintic resistance in gastrointestinal nematodes affecting sheep.
    • To evaluate the efficacy of albendazole, levamisole, and ivermectin against these parasites across different geographical locations.

    Main Methods:

    • A survey was conducted on five sheep farms in diverse geo-climatic regions.
    • Faecal egg counts were measured before and after treatment with albendazole, levamisole, and ivermectin.

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  • Efficacy was determined by the percentage reduction in faecal egg counts.

    • Main Results:

    • Resistance to albendazole and levamisole was confirmed on all surveyed farms.
    • Albendazole demonstrated variable efficacy, reducing faecal egg counts by 0-73%.
    • Levamisole showed reduced efficacy, with faecal egg counts reduced by 0-61%.
    • Ivermectin treatment resulted in no detectable eggs, indicating high efficacy against the surveyed nematode populations.

    Conclusions:

    • Widespread resistance to albendazole and levamisole in sheep nematodes necessitates strategic treatment approaches.
    • Ivermectin appears to be an effective option for nematode control in the surveyed regions, but continued monitoring is crucial.
    • Integrated parasite management strategies are essential to mitigate the impact of anthelmintic resistance in sheep farming.