Anthelmintic resistance in cattle

Johnathan Love, Mike Taylor

Research output: Contribution to specialist publicationFeatured article

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Parasitic nematode infections can affect all ages of cattle, but are mainly of clinical significance in young parasite-naïve calves in their first year at grass, or in second-year grazers (Figure 1). For these animals, several control and worming strategies have been advocated that have proved successful – particularly since the launch of the macrocyclic lactone (3-ML) class of anthelmintics, which now dominate the cattle “wormer” market.


  • Ostertagia ostertagi
  • Cooperia oncophora
  • parasitic nematode infection

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