Ivermectin-resistant Ostertagia circumcincta from sheep in the lower North Island and their susceptibility to other macrocyclic lactone anthelmintics

References

• Badger , SB and McKenna , PB . 1990 . Resistance to ivermectin in a field strain of Ostertagia spp . in goats. New Zealand Veterinary Journal , 38 : 72 – 4 .
   PubMed Web of Science ®Google Scholar
• Besier , RB . 1996 . Ivermectin resistant Ostertagia in Western Australia Christchurch : Proceedings of the New Zealand and Australian Sheep Veterinary Societies and Veterinarians in Industry Associations Conferences, .
   Google Scholar
• Brunsdon , RV , Kissling , R and Hosking , BC . 1983 . A survey of anthelmintic usage for sheep: a time for change . New Zealand Veterinary Journal , 31 : 24 – 9 .
   PubMed Web of Science ®Google Scholar
• Conder , GA , Thompson , DP and Johnson , SS . 1993 . Demonstration of co-resistance of Haemonchus contortus to ivermectin and moxidectin . Veterinary Record , 132 : 651 – 2 .
   PubMed Web of Science ®Google Scholar
• Gill , JH and Lacey , E . 1998 . Avermectin/milbemycin resistance in trichostrongylid nematodes . International Journal for Parasitology , 28 : 863 – 77 .
   PubMed Web of Science ®Google Scholar
• Gopal , RM , Pomroy , WE and West , DM . 1999 . Resistance of field isolates of Trichostrongylus colubriformis and Ostertagia circumcincta to ivermectin . International Journal for Parasitology , 29 : 781 – 6 .
   PubMed Web of Science ®Google Scholar
• Hennessy , DR , Sangster , NC , Steel , JW and Collins , GH . 1993 . Comparative pharmacokinetic behaviour of albendazole in sheep and goats . International Journal for Parasitology , 23 : 321 – 5 .
   PubMedGoogle Scholar
• Kettle , PR , Vlassoff , A , Reid , TC and Horton , CT . 1983 . A survey of nematode control measures used by milking-goat farmers and of anthelmintic resistance on their farms . New Zealand Veterinary Journal , 31 : 139 – 43 .
   PubMed Web of Science ®Google Scholar
• Kettle , PR and White , DA . 1981/82 . “ Metabolism of anthelmintics ” . In Agricultural Research Division, New Zealand Ministry of Agriculture and Fisheries Annual Report 168 – 168 . Wellington : New Zealand Ministry of Agriculture and Fisheries, .
   Google Scholar
• Kieran , PJ . 1994 . Moxidectin against ivermectin-resistant nematodes — a global view . Australian Veterinary Journal , 71 : 18 – 20 .
   PubMed Web of Science ®Google Scholar
• Leathwick , DM . 1995 . A case of moxidectin failing to control ivermectin resistant Ostertagia species in goats . Veterinary Record , 136 : 443 – 4 .
   PubMed Web of Science ®Google Scholar
• Jambre , LF Le , Gill , JH , Lenane , IJ and Lacey , E . 1995 . Characterisation of an avermectin resistant strain of Australian Haemonchus contortus . International Journal for Parasitology , 25 : 691 – 8 .
   PubMedGoogle Scholar
• Macchi , C , Pomroy , WE , Pfeiffer , DU , Morris , RS , West , DM and Sanson , RL . 1999 . Anthelmintic use in sheep; results of a questionnaire . New Zealand Journal of Zoology , 26 : 70 – 70 .
   Google Scholar
• Mason , PC . 1997 . “ Internal parasites of goats in New Zealand ” . In Sustainable control of internal parasites in ruminants. Animal Industries Workshop Edited by: Barrell , GK . 57 – 66 . Lincoln : Lincoln University, .
   Google Scholar
• Mason , P , Nottingham , R and McKay , C . 1999 . “ A field strain of ivermectin resistant Ostertagia circumcincta in sheep in New Zealand ” . In Proceedings of the New Zealand Society for Parasitology Vol. 28 ,
   Google Scholar
• McKellar , QA and Benchaoui , HA . 1996 . Avermectins and milbemycins . Journal of Veterinary Pharmacology and Therapeutics , 19 : 331 – 51 .
   PubMed Web of Science ®Google Scholar
• McKenna , PB . 1990 . The detection of anthelmintic resistance by the faecal egg count reduction test: An examination of some of the factors affecting performance and interpretation . New Zealand Veterinary Journal , 38 : 142 – 7 .
   PubMed Web of Science ®Google Scholar
• McKenna , PB . 1991a . Update on drench resistance . Proceedings of the Sheep and Beef Cattle Society of the New Zealand Veterinary Association , 21 : 55 – 60 .
   Google Scholar
• McKenna , PB . 1991b . Update on anthelmintics in goats . Proceedings of the Sheep and Beef Cattle Society of the New Zealand Veterinary Association , 21 : 93 – 6 .
   Google Scholar
• McKenna , PB , Allan , CM , Taylor , MJ and Townsend , KG . 1995 . The prevalence of anthelmintic resistance in ovine case submissions to animal health laboratories in New Zealand in 1993 . New Zealand Veterinary Journal , 43 : 96 – 8 .
   PubMed Web of Science ®Google Scholar
• McKenna , PB . 1998 . What do anthelmintic efficacy figures really signify . New Zealand Veterinary Journal , 46 : 82 – 3 .
   PubMed Web of Science ®Google Scholar
• Pomroy , WE , Whelan , N , Alexander , AM , West , DW , Stafford , K , Adlington , BA and Calder , SM . 1992 . Multiple resistance in goat-derived Ostertagia and the efficacy of moxidectin and combinations of other anthelmintics . New Zealand Veterinary Journal , 40 : 76 – 8 .
   PubMed Web of Science ®Google Scholar
• Shoop , WL , Haines , HW , Michael , BF and Eary , CH . 1993 . Mutual resistance to avermectins and milbemycins: oral activity of ivermectin and moxidectin against ivermectin-resistant and susceptible nematodes . Veterinary Record , 133 : 445 – 7 .
   PubMed Web of Science ®Google Scholar
• Shoop , WL , Mrozik , H and Fisher , MH . 1995 . Structure and activity of avermectins and milbemycins in animal health . Veterinary Parasitology , 59 : 139 – 56 .
   PubMed Web of Science ®Google Scholar
• Sutherland , IA , Leathwick , DM and Brown , AE . 1999 . Moxidectin: persistence and efficacy against drug-resistant Ostertagia circumcincta . Journal of Veterinary Pharmacology and Therapeutics , 22 : 2 – 5 .
   PubMed Web of Science ®Google Scholar
• Vermunt , JJ , West , DM and Pomroy , WE . 1995 . Multiple resistance to ivermectin and oxfendazole in Cooperia species of cattle in New Zealand . Veterinary Record , 137 : 43 – 5 .
   PubMed Web of Science ®Google Scholar
• Vlassoff , A and Kettle , PR . 1980 . Benzimidazole resistance in Haemonchus contortus . New Zealand Veterinary Journal , 28 : 23 – 4 .
   Web of Science ®Google Scholar
• Waller , PJ . 1997 . “ Anthelmintic resistance ” . In Sustainable control of internal parasites in ruminants. Animal Industries Workshop Edited by: Barrell , GK . 129 – 40 . Lincoln : Lincoln University, .
   Google Scholar
• Watson , TG and Hosking , BC . 1990 . Evidence for multiple anthelmintic resistance in two nematode parasite genera on a Saanen goat dairy . New Zealand Veterinary Journal , 38 : 50 – 3 .
   PubMed Web of Science ®Google Scholar
• Watson , TG , Hosking , BC , Leathwick , DM and McKee , PF . 1996 . Ivermectin- moxidectin side resistance by Ostertagia species isolated from goats and passaged into sheep . Veterinary Record , 138 : 472 – 3 .
   PubMed Web of Science ®Google Scholar