Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 404048
Title How widespread is resistance to invermectin among gastrointestinal nematodes in sheep in The Netherlands? = Hoe wijd verspreid is resistentie tegen ivermectine van maagdarmwormen bij het schaap in Nederland?
Author(s) Borgsteede, F.H.M.; Verkaik, J.C.; Moll, L.; Dercksen, D.; Vellema, P.; Bavinck, G.
Source Tijdschrift voor Diergeneeskunde 135 (2010)21. - ISSN 0040-7453 - p. 782 - 785.
Department(s) CVI - Divisie Bacteriologie en TSE's
LR - Backoffice
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) ivermectine - schapen - maagdarmziekten - wormen - schapenhouderij - haemonchus contortus - ivermectin - sheep - gastrointestinal diseases - helminths - sheep farming - anthelmintic resistance - teladorsagia-circumcincta - haemonchus-contortus - moxidectin - ostertagia - efficacy - benzimidazole - association - strain
Categories Animal Health and Welfare / Small Ruminants (Sheep and Goats)
Abstract In Autumn 2009, a faecal egg count reduction test (FERCT) was carried out on three sheep farms. Groups of 8-11 lambs were treated with ivermectin or moxidectin, with a 14-day interval between treatment and sampling. Ivermectin resistance was present on all three farms. Treatment with ivermectin resulted in a reduction in faecal egg numbers of 94.6%, 63%, and 59%. On two farms, 14 days after treatment pooled faecal samples yielded predominantly larvae of Hamonchus contortus (100% and 98%, respectively). On the third farm, H. contortus and (probably) Teladorsagia circumcincta were resistant to ivermectin (64% and 36% of the larvae, respectively). Treatment with moxidectin resulted in a 100% reduction in egg output in sheep on all three farms. More sensitive culture techniques failed to detect any larvae in samples taken from two farms, but a few Ostertagia-type larvae, probably of T. circumcincta, were detected in samples from the third farm. It can be concluded that gastrointestinal nematodes in sheep from these three farms were resistant to ivermectin, whereas resistance to moxidectin was not detected.
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