Simultaneous resistance to two or more broad-spectrum anthelmintics by gastrointestinal nematode parasites of sheep and goats |
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| Authors: | PB McKenna SB Badger RL McKinley DE Taylor |
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| Institution: | 1. Batchelar Animal Health Laboratory , PO Box 1654, Palmerston North;2. Veterinary Services (Hawkes Bay) Ltd , PO Box 503, Waipukurau;3. Veterinary Services (Hawkes Bay) Ltd , 506 West Queen St, Hastings;4. Wanganui Veterinary Club Inc. , PO Box 911, Wanganui |
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| Abstract: | The detection, by means of faecal egg count reduction tests and larval cultures, of two cases of multiple anthelmintic resistance in goats and two in sheep, is reported. The former cases appeared to involve resistance to all three broad-spectrum drench groups (benzimidazole, levamisole, ivermectin) by mainly Ostertugia spp., the latter resistance to two of them (benzimidazole, levamisole) bv Trichostrondus spp. (New Zealand Veterinary Journal 38, 114–117, 1990) |
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| Keywords: | Volcanic ash trace elements livestock |
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