Resistencia a los antihelmínticos en bovinos del nordeste de Corrientes (Argentina)

Abstract

The objective of this research was to determine the prevalence of the resistance to antiparasitics of bovine gastrointestinal nematodes in the northeast of Corrientes. The studied area comprised 4 livestock establishments in Ituzaingó and Santo Tomé districts. The study period ran from March 2014 to August 2016. The analysis unit was the weaning calf. The method used was the faecal egg count reduction test. The prevalence of the anthelmintic resistance to ivermectin in the four livestock establishments sampled in this study was of 100% and 25% to benzimidazole. The parasite genders resistant to ivermectina were Haemonchus and Cooperia. These results demonstrate an increase in anthelmintic resistance when compared with previous studies elsewhere in the country.