A survey of anthelmintic resistant nematode parasites in Scottish sheep flocks

The state of anthelmintic resistance in Scottish sheep flocks was evaluated during April–August 2000 using in vitro bioassays, egg hatch assays for detecting thiabendazole (TBZ) resistance and larval development assays for levamisole, ivermectin and TBZ resistance. Anaerobic sampling kits and detail...

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Bibliographic Details
Published in:Veterinary parasitology 2003-11, Vol.117 (1), p.61-71
Main Authors: Bartley, David J, Jackson, Elizabeth, Johnston, Kelly, Coop, Robert L, Mitchell, George B.B, Sales, Jill, Jackson, Frank
Format: Article
Language:English
Subjects:
Animal Husbandry
Animals
Anthelmintic resistance
Anthelmintics - pharmacology
Anthelmintics - therapeutic use
Antinematodal Agents - pharmacology
Benzimidazole
Biological Assay - veterinary
Drug Resistance
Egg hatch assay
Female
Ivermectin - pharmacology
Larva - drug effects
Larval development assay
Levamisole - pharmacology
Male
Nematoda - drug effects
Nematode
Nematode Infections - drug therapy
Nematode Infections - parasitology
Nematode Infections - veterinary
Ovum - drug effects
Parasitic Sensitivity Tests - veterinary
Questionnaire
Scotland
Sheep
Sheep Diseases - drug therapy
Sheep Diseases - parasitology
Sheep-drug resistance
Surveys and Questionnaires
Thiabendazole - pharmacology
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Summary:The state of anthelmintic resistance in Scottish sheep flocks was evaluated during April–August 2000 using in vitro bioassays, egg hatch assays for detecting thiabendazole (TBZ) resistance and larval development assays for levamisole, ivermectin and TBZ resistance. Anaerobic sampling kits and detailed questionnaires outlining farm demographics and current management practices were mailed to 227 Moredun Foundation member farms, replies were received from 98 farms. Kits received from 90 farms contained sufficient material to conduct one or more of the assays. A majority of the farms examined (64%) exhibited TBZ resistance but there were both farm locality and regional variations in the percentage of resistant farms. Teladorsagia was the predominant genera detected from farms. No resistance to levamisole or ivermectin was detected in any of the samples. There was no strong evidence from this survey that any of the management practices examined greatly affected TBZ resistance.
ISSN:0304-4017
1873-2550
DOI:10.1016/j.vetpar.2003.07.023