Farm management practices associated with macrocyclic lactone resistance on sheep farms in New Zealand

References

• Barger, IA, and Southcott, WH, 1978. Parasitism and production in weaner sheep grazing alternately with cattle, Australian Journal of Experimental Agriculture 18 (1978), pp. 340–346.
   Google Scholar
• Barnes, EH, Dobson, RJ, and Barger, IA, 1995. Worm control and anthelmintic resistance: Adventures with a model, Parasitology Today 11 (1995), pp. 56–63.
   PubMedGoogle Scholar
• Bartley, DJ, Jackson, E, Johnston, K, Coop, RL, Mitchell, GBB, Sales, J, and Jackson, F, 2003. A survey of anthelmintic-resistant nematode parasites in Scottish sheep flocks, Veterinary Parasitology 117 (2003), pp. 61–71.
   PubMed Web of Science ®Google Scholar
• Bates, J, Mirams, G, Hickford, J, and Hill, S, 2006. S3 — The sheep sustainability strategy: Project introduction and preliminary results, Proceedings of the New Zealand Society of Animal Production 66 (2006), pp. 20–23.
   Google Scholar
• Brunsdon, R, 1988. "The economic impact of nematode infection in sheep: Implications for future research and control". In: Heath, ACG, ed. The Economic Importance of Parasites of Livestock in New Zealand. Wellington, NZ: New Zealand Society for Parasitology, Miscellaneous; 1988. pp. 4–16.
   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 (1983), pp. 24–29.
   PubMed Web of Science ®Google Scholar
• Coles, GC, 2001. The future of veterinary parasitology, Veterinary Parasitology 98 (2001), pp. 31–39.
   PubMed Web of Science ®Google Scholar
• Coles, GC, and Roush, RT, 1992. Slowing the spread of anthelmintic-resistant nematodes of sheep and goats in the United Kingdom, Veterinary Record 130 (1992), pp. 505–510.
   PubMed Web of Science ®Google Scholar
• Dobson, RJ, Besier, RB, Barnes, EH, Love, SCJ, Vizard, A, Bell, K, and Jambre, LF Le, 2001. Principles for the use of macrocyclic lactones to minimise selection for resistance, Australian Veterinary Journal 79 (2001), pp. 756–761.
   PubMed Web of Science ®Google Scholar
• Gerstman, B, 2003. Epidemiology Kept Simple: An Introduction to Traditional and Modern Epidemiology. New Jersey, USA: John Wiley & Sons; 2003. pp. 201–202.
   Google Scholar
• Good, B, Hanrahan, J P, Crowley, BA, and Mulcahy, G, 2006. Texel sheep are more resistant to natural nematode challenge than Suffolk sheep based on faecal egg count and nematode burden, Veterinary Parasitology 136 (2006), pp. 317–327.
   PubMed Web of Science ®Google Scholar
• Hanley, JA, and McNeil, BJ, 1982. The meaning and use of the area under a receiver operating characteristic (ROC) curve, Radiology 143 (1982), pp. 29–36.
   PubMed Web of Science ®Google Scholar
• Hosmer, D, and Lemeshow, S, 2000. Applied Logistic Regression. New York, USA: A Wiley & Sons Inc; 2000.
   Google Scholar
• Hughes, PL, McKenna, PB, and Murphy, A, 2004. Resistance to moxidectin and abamectin in naturally acquired Ostertagia circumcincta infections in sheep, New Zealand Veterinary Journal 52 (2004), pp. 202–204.
   PubMed Web of Science ®Google Scholar
• Hughes, PL, McKenna, PB, and Dowling, AF, 2005. A survey of the prevalence of emerging macrocyclic lactone resistance and of benzimidazole resistance in sheep nematodes in the lower North Island of New Zealand, New Zealand Veterinary Journal 53 (2005), pp. 87–90.
   PubMed Web of Science ®Google Scholar
• Hyndman, RJ, and Fan, YN, 1996. Sample quantiles in statistical packages, American Statistician 50 (1996), pp. 361–365.
   Web of Science ®Google Scholar
• Jackson, R, Rhodes, A P, Pomroy, WE, Leathwick, DM, West, DM, Waghorn, TS, and Moffat, JR, 2006. Anthelmintic resistance and management of nematode parasites on beef cattle-rearing farms in the North Island of New Zealand, New Zealand Veterinary Journal 54 (2006), pp. 289–296.
   PubMed Web of Science ®Google Scholar
• Kettle, PR, Vlassoff, A, Lukies, JM, Ayling, JM, and McMurtry, LW, 1981. A survey of nematode control measures used by sheep farmers and of anthelmintic resistance on their farms. 1. North Island and the Nelson region of the South Island, New Zealand Veterinary Journal 29 (1981), pp. 81–83.
   PubMed Web of Science ®Google Scholar
• Kettle, PR, Vlassoff, A, Ayling, JM, McMurtry, LW, Smith, SJ, and Watson, AJ, 1982. A survey of nematode control measures used by sheep farmers and of anthelmintic resistance on their farms. 2. South Island excluding the Nelson Region, New Zealand Veterinary Journal 30 (1982), pp. 79–81.
   PubMed Web of Science ®Google Scholar
• Leathwick, DM, 2004. Managing drench resistance in sheep parasites, Proceedings of the 34th Annual Seminar of the Society of Sheep and Beef Cattle Veterinarians of the New Zealand Veterinary Association (2004), pp. 73–84.
   Google Scholar
• Leathwick, DM, Vlassoff, A, and Barlow, ND, 1995. A model for nematodiasis in New Zealand lambs: The effect of drenching regime and grazing management on the development of anthelmintic resistance, International Journal for Parasitology 25 (1995), pp. 1479–1490.
   PubMed Web of Science ®Google Scholar
• Leathwick, DM, Miller, CM, Brown, AE, and Sutherland, IA, 1999. The establishment rate of Ostertagia circumcincta and Trichostronglyus colubriformis in lactating Romney ewes, International Journal for Parasitology 29 (1999), pp. 315–320.
   PubMed Web of Science ®Google Scholar
• Leathwick, DM, Pomroy, WE, and Heath, ACG, 2001. Anthelmintic resistance in New Zealand, New Zealand Veterinary Journal 49 (2001), pp. 227–235.
   PubMed Web of Science ®Google Scholar
• Leathwick, DM, Miller, CM, Atkinson, DS, Haack, NA, Alexander, RA, Oliver, A-M, Waghorn, TS, Potter, JF, and Sutherland, IA, 2006. Drenching adult ewes: Implications of anthelmintic treatments pre- and post-lambing on the development of anthelmintic resistance, New Zealand Veterinary Journal 54 (2006), pp. 297–304.
   PubMed Web of Science ®Google 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 (1999), pp. 70–70.
   Google Scholar
• Mason, P, Nottingham, R, and McKay, C, 2001. A field strain of ivermectin-resistant Ostertagia circumcincta in sheep in New Zealand, New Zealand Journal of Zoology 28 (2001), pp. 230–230.
   Google Scholar
• Nagelkerke, NJD, 1991. A note on a general definition of the coefficient of determination, Biometrika 78 (1991), pp. 691–692.
   Web of Science ®Google Scholar
• Palmer, DG, Besier, RB, Lyon, J, and Mitchell, TJ, 2001. Detecting macrocyclic lactone resistance using the faecal egg count reduction test — the Western Australian experience. Onderstepoort, South Africa: Proceedings of the Fifth International Congress for Sheep Veterinarians; 2001, CD-Rom.
   Google Scholar
• Pomroy, WE, 2006. Anthelmintic resistance in New Zealand: A perspective on recent findings and options for the future, New Zealand Veterinary Journal 54 (2006), pp. 265–270.
   PubMed Web of Science ®Google Scholar
• Pregibon, D, 1981. Logistic-regression diagnostics, Annals of Statistics 9 (1981), pp. 705–724.
   Web of Science ®Google Scholar
• Rendell, DK, Rentsch, TE, Smith, JM, Chandler, DS, and Callinan, APL, 2006. Evidence that moxidectin is a greater risk factor than ivermectin in the development of resistance to macrocyclic lactones by Ostertagia spp in sheep in south eastern, Australia New Zealand Veterinary Journal 54 (2006), pp. 313–317.
   PubMed Web of Science ®Google Scholar
• Rhodes, A P, Leathwick, DM, Waghorn, TS, Pomroy, WE, West, DM, Jackson, R, Lawrence, K, and Moffat, J, 2006 a. Prevalence of Anthelmintic Resistance on Sheep Farms in New Zealand. Part 2a of a series. Wellington, NZ: Sustainable Farming Fund, MAF, and Meat and Wool New Zealand; 2006 a, http://www.meatnz.co.nz/main. cfm?id=260=238 (accessed 28 October 2006).
   Google Scholar
• Rhodes, A P, Leathwick, DM, Waghorn, TS, Pomroy, WE, West, DM, Jackson, R, Lawrence, K, and Moffat, J, 2006 b. Management of Internal Nematode Parasites on Sheep Farms in New Zealand. Part 2b of a series. Wellington, NZ: Sustainable Farming Fund, MAF, and Meat and Wool New Zealand; 2006 b, http://www.meatnz.co.nz/main. cfm?id=260=238 (accessed 28 October 2006).
   Google Scholar
• Rowlands, GJ, 1998. Logistic regression analysis in observational studies: possible pitfalls and presentation of results. Ennis, Ireland: Proceedings of the Society for Veterinary Epidemiology and Preventive Medicine; 1998. pp. 56–68.
   Google Scholar
• Sanson, R, and Pearson, A, 1997. Logistic regression analysis in observational studies: possible pitfalls and presentation of results. Vol. 16.3. 1997. pp. 1–12.
   Google Scholar
• Sharma, SS, Pomroy, WE, and Moffat, JR, 2005. A limited survey of parasitic control practices on New Zealand sheep farms and also the prevalence of anthelmintic resistance on some of these farms, New Zealand Journal of Zoology 32 (2005), pp. 282–283.
   Web of Science ®Google Scholar
• Somers, RH, 1962. A new asymmetric measure of association for ordinal variables, American Sociological Review 27 (1962), pp. 799–811.
   Web of Science ®Google Scholar
• Suter, RJ, Besier, RB, Perkins, NR, Robertson, ID, and Chapman, HM, 2004. Sheep-farm risk factors for ivermectin resistance in Ostertagia circumcincta in Western Australia, Preventive Veterinary Medicine 63 (2004), pp. 257–269.
   PubMed Web of Science ®Google Scholar
• Sutherland, IA, Leathwick, DM, Moen, IC, and Bisset, SA, 2002. Resistance to therapeutic treatment with macrocyclic lactone anthelmintics in Ostertagia circumcincta, Veterinary Parasitology 109 (2002), pp. 91–99.
   PubMed Web of Science ®Google Scholar
• Sutherland, IA, Brown, AE, Leathwick, DM, and Bisset, SA, 2003. Resistance to prophylactic treatment with macrocyclic lactone anthelmintics in Teladorsagia circumcincta, Veterinary Parasitology 115 (2003), pp. 301–309.
   PubMed Web of Science ®Google Scholar
• Wyk, JA Van, 2001. Refugia — overlooked as perhaps the most potent factor concerning the development of anthelmintic resistance, Onderstepoort Journal of Veterinary Research 68 (2001), pp. 55–67.
   PubMed Web of Science ®Google Scholar
• Vlassoff, A, and Kettle, PR, 1980. Benzimidazole resistance in Haemonchus contortus, New Zealand Veterinary Journal 28 (1980), pp. 23–24.
   Web of Science ®Google Scholar
• Waghorn, TS, Leathwick, DM, Rhodes, A P, Lawrence, KE, Jackson, R, Pomroy, WE, West, DM, and Moffat, JR, 2006 a. Prevalence of anthelmintic resistance on sheep farms in New Zealand, New Zealand Veterinary Journal 54 (2006 a), pp. 271–277.
   PubMed Web of Science ®Google Scholar
• Waghorn, TS, Leathwick, DM, Rhodes, A P, Jackson, R, Pomroy, WE, West, DM, and Moffat, JR, 2006 b. Prevalence of anthelmintic resistance on 62 beef cattle farms in the North Island of New Zealand, New Zealand Veterinary Journal 54 (2006 b), pp. 278–282.
   PubMed Web of Science ®Google Scholar
• Woodford, K, and Nicol, A, 2004. A re-assessment of the stock unit system. MAF Information. Wellington, NZ: Paper No: 2005/02. MAF; 2004.
   Google Scholar
• Wrigley, J, McArthur, M, McKenna, PB, and Mariadass, B, 2006. Resistance to a triple combination of broad-spectrum anthelmintics in naturally-acquired Ostertagia circumcincta infections in sheep, New Zealand Veterinary Journal 54 (2006), pp. 47–49.
   PubMed Web of Science ®Google Scholar