2014
DOI: 10.1590/s1984-29612014045
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Risk factors for anthelmintic resistance development in cattle gastrointestinal nematodes in Argentina

Abstract: Risk factors for anthelmintic resistance (AR) on bovine ranches were studied. Data were derived from a survey made to 50 ranch owners, who had conducted a faecal egg-count-reduction test. The questionnaire contained descriptors of bovine ranch management and nematode control. A case-control design study was undertaken and AR cases were present in 26 herds. Associations between the binary outcome variable (AR versus not AR) and risk factors recorded in the questionnaire were evaluated. Variables associated with… Show more

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Cited by 9 publications
(2 citation statements)
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References 29 publications
(32 reference statements)
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“…In line with the lower efficacy rates of ivermectin, it was observed that macrocyclic lactones, especially avermectins, were the drugs most used for anthelmintic treatments on the farms studied, similarly to what had been observed in other studies (Pereira, 2011;Suarez & Cristel, 2014). Soutello et al (2007) and Ramos et al (2018Ramos et al ( , 2020 stated that the higher rate of resistance to ivermectin, compared with other drugs, was probably related to its frequent use, and to its easy availability and ease of acquisition by farmers.…”
Section: Discussionsupporting
confidence: 83%
“…In line with the lower efficacy rates of ivermectin, it was observed that macrocyclic lactones, especially avermectins, were the drugs most used for anthelmintic treatments on the farms studied, similarly to what had been observed in other studies (Pereira, 2011;Suarez & Cristel, 2014). Soutello et al (2007) and Ramos et al (2018Ramos et al ( , 2020 stated that the higher rate of resistance to ivermectin, compared with other drugs, was probably related to its frequent use, and to its easy availability and ease of acquisition by farmers.…”
Section: Discussionsupporting
confidence: 83%
“…Las principales se centran en la alta frecuencia de desparasitaciones, el uso indiscriminado de antipara-sitarios y la falta de rotación de principios activos (Fiel et al, 2001), además del concepto de refugio, que en parasitología se define como la proporción de la población parasitaria que no es expuesta a la acción del control, siendo, para el caso de los nemátodos gastrointestinales, la población de parásitos en estadios de vida libre que se encuentra en el pasto (Buffarini, 2011). La implementación de programas de control parasitario que consideren el concepto de refugio es fundamental para mantener una población parasitaria en la pastura que no esté sujeta a la selección por tratamientos antihelmínticos, reduciendo así la aparición de RA (Suarez y Cristel, 2014.…”
Section: Introductionunclassified