Monepantel resistance identified in UK can pose worm prevalence risk in the future

摘要

Monepantel resistance has been confirmed on a mixed Livestock and arable unit in the UK.The farm runs 1,200 ewes and sells lambs during an extended period on a supermarket contract.The unit, based in the south west, lambs in three batches of 400 due to housing capacity restrictions. Grazing comprises of blocks of permanent pasture, some co-grazed with cattle.Suspicion of monepantel resistance first emerged in autumn 2018 when a Fecal Egg Count (FEC), revealed a count of 1,020 eggs per gram (epg). The farmer was surprised at the result because this batch of sheep had been wormed with monepantel only two weeks previously.