The impact of dosing adult ewes for worms has on the development of resistance

On this week’s OviCast podcast Ciarán Lynch caught up with Dr Dave Leathwick following this year’s National Sheep Conference.

Dave, who is principal scientist in parasitology at the Pastoral Agricultural Research Centre in New Zealand, has for almost 35 years been researching nematode parasites of grazing livestock, with a focus on their biology and control, and the development and management of anthelmintic resistance.

Dave discusses the challenge posed by anthelminthic resistance in New Zealand and the factors contributing to its development.

In a wide ranging discussion Dave explains in detail the impact of dosing adult ewes for worms has on the development of resistance.

He finishes up discussing how worm control will require a change in mind-set going forward to maintain a susceptible worm population on farms.

Read Dave’s paper from the National Sheep Conference here https://www.teagasc.ie/media/website/publications/2023/National-Sheep-Conferences-2023.pdf

For more episodes from the OviCast podcast, visit the show page at https://www.teagasc.ie/animals/sheep/ovicast-sheep-podcast