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Review of Anthelmintic Resistance

Dr. Ray Kaplan from the University of Georgia recently authored a publication on anthelmintic resistance: Biology, Epidemiology ,Diagnosis, and Management of Anthelmintic Resistance in Gastrointestinal Nematodes of Livestock. The key points of his article are:

  1. Anthelmintic resistance is a severe and worsening problem worldwide.

  2. Anthelmintic resistance is natural evolutionary process that is impossible to prevent, but the rate can be substantially reduced by modifying strategies of anthelmintic use.

  3. The further development and spread of anthelmintic resistance will outpace the development of new anthelmintic classes; active measures must be implemented to reduce the development of resistance.

  4. Fecal egg count reduction tests should be performed on every farm to determine the efficacy of dewormers being used.

  5. Refugia-based strategies and anthelmintic combinations must be implemented immediately across the livestock industry to reduce the development of resistance and preserve the efficacy of the few existing anthelmintics that remain effective.

The review article was published in the March 2020 issue of Veterinary Clinics of North America: Food Animal Practice. Source:

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