Multigeneric resistance to benzimidazole anthelmintics in four sheep flocks |
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| Authors: | DM West WE Pomroy AD Probert WAG Charleston |
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| Institution: | 1. Department of Veterinary Clinical Sciences , Massey University , Palmerston North, New Zealand;2. Department of Veterinary Pathology and Public Health , Massey University , Palmerston North, New Zealand |
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| Abstract: | Clinical parasitism associated with multigeneric resistance to benzimidazole anthelmintics was investigated in four sheep flocks during February and March 1989. The genera considered resistant were Haemonchus and Nematodirus spp. on all four farms and Trichostrongylus and Ostertagia spp. on three of the four farms. It is suggested that when investigating cases of suspected drench resistance, postdrenching worm counts are useful to help identify the resistant worm species present. |
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| Keywords: | Broiler chickens stocking density performance carcass characteristics welfare indicators |
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