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No Evidence for Resistance to Fenbendazole in Trichostrongylus tenuis , a Nematode Parasite of the Red Grouse
Author(s) -
Cox Ruth,
Newborn David,
Baines David,
Thomas Christopher J.,
Sherratt Thomas N.
Publication year - 2010
Publication title -
the journal of wildlife management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.94
H-Index - 111
eISSN - 1937-2817
pISSN - 0022-541X
DOI - 10.2193/2009-114
Subject(s) - grouse , biology , fenbendazole , trichostrongylus , anthelmintic , lagopus , eimeria , parasite hosting , veterinary medicine , population , nematode , resistance (ecology) , ecology , microbiology and biotechnology , habitat , medicine , arctic , demography , sociology , world wide web , computer science
The parasitic nematode Trichostrongylus tenuis has a detrimental effect on red grouse ( Lagopus lagopus scoticus ) at the individual and population levels. Treatment using grit coated with the anthelmintic fenbendazole hydrochloride reduces parasite infection and increases grouse density. However, a frequent and low dose of anthelmintic increases selection pressure for parasite resistance, a serious practical and economic problem. We used an egg hatch assay to test resistance of T. tenuis from 12 moors in northern England, which differed in grit treatment intensity. The anthelmintic concentration that prevented 50% and 95% of T. tenuis eggs from hatching (ED 50 and ED 95 , respectively) did not differ among moors and were not related to treatment. We suggest annual monitoring and responsible anthelmintic use to prevent resistance so that medicated grit continues to enhance red grouse management.