2006
DOI: 10.1080/00480169.2006.36711
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Prevalence of anthelmintic resistance on 62 beef cattle farms in the North Island of New Zealand

Abstract: Anthelmintic resistance in parasitic nematodes of cattle is common in the North Island of New Zealand. Beef farmers need to be aware of the risks posed by anthelmintic resistance, and routine FECR testing is recommended to ensure optimal productivity and to guide decision-making when purchasing anthelmintics to be used on-farm.

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Cited by 122 publications
(50 citation statements)
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“…has become increasingly common in Brazil (Echevarria and Pinheiro, 1999), Argentina Fiel et al, 2001;Mejia et al, 2003), New Zealand (Familton et al, 2001;Loveridge et al, 2003;Vermunt et al, 1996), the US (Gasbarre et al, 2004) and the UK (Coles et al, 1998. To date, the first cases of suspected emerging IVM resistance in O. ostertagi are reported in New Zealand (Mason and McKay, 2006;Waghorn et al, 2006) and Argentina (Suarez and Cristel, 2007 not yet been confirmed with controlled field studies. In the light of these recent findings ML resistance in O. ostertagi might be more common than currently recognized.…”
Section: Introductionmentioning
confidence: 99%
“…has become increasingly common in Brazil (Echevarria and Pinheiro, 1999), Argentina Fiel et al, 2001;Mejia et al, 2003), New Zealand (Familton et al, 2001;Loveridge et al, 2003;Vermunt et al, 1996), the US (Gasbarre et al, 2004) and the UK (Coles et al, 1998. To date, the first cases of suspected emerging IVM resistance in O. ostertagi are reported in New Zealand (Mason and McKay, 2006;Waghorn et al, 2006) and Argentina (Suarez and Cristel, 2007 not yet been confirmed with controlled field studies. In the light of these recent findings ML resistance in O. ostertagi might be more common than currently recognized.…”
Section: Introductionmentioning
confidence: 99%
“…Numerous studies about bovine nematode AR have been reported worldwide, mostly in regions where production systems are based on grazing management, such as New Zealand, Brazil, Colombia, UK and the United States. AR has been reported for all the broad-spectrum anthelmintics *Corresponding author: Víctor Humberto Suarez Laboratório de Parasitología, Unidad de Salud Animal Estación Experimental Agropecuaria Salta, INTA, RN68 Km 172, 4403, Cerrillos, Salta, Argentina e-mail: suarez.victor@inta.gob.ar; suarez@correo.inta.gov.ar (levamisole, benzimidazoles and macrocyclic lactones) used for cattle (PAIVA et al, 2001;FAMILTON et al, 2001;COLES, 2002;WAGHORN et al, 2006;MÁRQUEZ et al, 2008;GASBARRE et al, 2009). In Argentina, the first cases of macrocyclic lactone and benzimidazoles resistance in cattle were reported by Anziani et al (2001) and Fiel et al (2001).…”
Section: Introductionmentioning
confidence: 99%
“…Adult worms can be readily identified, but collecting them requires euthanasia of the host. Morphological features cannot be used to distinguish eggs of all species parasitising sheep (Wilson et al 2008;Bailey et al 2009) and cattle (Waghorn et al 2006); therefore, eggs are hatched in culture and the larvae are examined. Routine identification of third-stage infective larvae (L3) is based on either morphological features or size (Lancaster and Hong 1987;McMurtry et al 2000;van Wyk et al 2004): Haemonchus contortus can be identified by a long, whiplike tail, whereas Teladorsagia circumcincta and Trichostrongylus colubriformis are distinguished by length, the ranges of which can overlap for the two species (Lancaster and Hong 1987).…”
Section: Introductionmentioning
confidence: 99%