A survey of the trichostrongylid nematode species present on UK sheep farms and associated anthelmintic control practices

Veterinary Parasitology
Charlotte G S BurgessF Jackson

Abstract

A survey of sheep farms from across the UK was conducted to establish information on farming practices, the trichostrongylid nematode species present and anthelmintic usage. Questionnaires and faecal samples were returned from 118 farms. First stage larvae (L(1)) were cultured from faecal samples and used for PCR analysis to determine the presence/absence of selected trichostrongylid species. Teladorsagia circumcincta was the only species present on 100% of farms. Haemonchus contortus was found on ∼50% of farms and was widespread throughout the UK. The most common Trichostrongylus spp. was T. vitrinus, found on 95% of farms. Determining the anthelmintic dose rate based on the weight of the heaviest animal in the flock to avoid under dosing was carried out on 58% of farms and was associated with a significantly lower mean epg (p<0.001) in lambs. However, the weight of animals was only estimated (as opposed to animals weighed) on 32% of farms. Macrocyclic lactones (ML) were the most commonly used anthelmintic class for ewes, whilst benzimidazoles (BZ) were the most widely used in lambs. Twenty-two of the surveyed farms had confirmed anthelmintic resistance, of these, 18 had BZ resistance, one had levamisole (LEV) resistance and 3...Continue Reading

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Citations

Jul 31, 2014·Parasite : Journal De La Société Française De Parasitologie·Signe A HolmHeidi L Enemark
Jun 13, 2015·Royal Society Open Science·Naomi J FoxMichael R Hutchings
Sep 3, 2016·The Veterinary Record
Nov 9, 2020·Parasites & Vectors·Mohammad Amin GhateeHasan Azarmehr
Nov 13, 2020·Parasitology Research·Verónica Castilla-Gómez de AgüeroMaría Martínez-Valladares
Feb 28, 2021·Animal : an International Journal of Animal Bioscience·L A MelvilleF Kenyon
Jul 30, 2021·Transactions of the Royal Society of Tropical Medicine and Hygiene·Christian KositzMichael Marks

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Anthelmintics (ASM)

Anthelmintics or antihelminthics are a group of antiparasitic drugs that expel parasitic worms (helminths) and other internal parasites from the body by either stunning or killing them and without causing significant damage to the host. Discover the latest research on anthelmintics here.

Anthelmintics

Anthelmintics or antihelminthics are a group of antiparasitic drugs that expel parasitic worms (helminths) and other internal parasites from the body by either stunning or killing them and without causing significant damage to the host. Discover the latest research on anthelmintics here.