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    Primer reporte de resistencia antiparasitaria a ivermectina en cuyes de Cajamarca, Per煤

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    The aim of this study was to determine the efficacy of three frequently drugs used in the treatment of nematodes in guinea pigs at the Ba帽os del Inca Experimental Station of the National Institute of Agricultural Innovation (INIA), Cajamarca. Forty male guinea pigs of the Inka line between 2 to 3 months of age, positive for Trichuris spp and Paraspidodera uncinata, naturally infected, and reared within the same management and feeding system were used. The guinea pigs were homogeneously distributed according to the number of eggs per gram of faeces in 20 positive for Paraspidodera uncinata and 20 for Trichuris spp, distributed in four groups of five each. The treatments were T0: control group, not dosed; T1: fenbendazole 20 mg/kg, PO; T2: oxfendazole 20 mg/kg, PO; and T3: ivermectin 0.5 mg/kg, SQ. The evaluation was carried out by necropsy on day 10 of dosing using the the Randomized Controlled Trial. An efficacy of 100% was determined for fenbendazole and oxfendazole against Trichuris spp and P. uncinata, while ivermectin was 91% effective against P. uncinata and 68% against Trichuris spp. It is concluded that, in INIA-Cajamarca guinea pigs, P. uncinata and Trichuris spp were susceptible to fenbendazole and oxfendazole, and resistant to ivermectin.El presente estudio tuvo como objetivo determinar la eficacia de tres principios activos de uso frecuente en el tratamiento de nematodos en cuyes de la Estaci贸n Experimental Ba帽os del Inca del Instituto Nacional de Innovaci贸n Agropecuaria (INIA), Cajamarca. Se utilizaron 40 cuyes machos de la l铆nea Inka de entre 2 a 3 meses de edad, positivos a Trichuris spp y Paraspidodera uncinata, infectados naturalmente, y criados dentro de un mismo sistema de manejo y alimentaci贸n. Los cuyes fueron distribuidos homog茅neamente seg煤n el n煤mero de huevos por gramo de heces en 20 positivos a Paraspidodera uncinata y 20 a Trichuris spp, distribuidos en cuatro grupos de cinco cada uno. Los tratamientos fueron T0: grupo control, no dosificado; T1: fenbendazol 20 mg/kg, PO; T2: oxfendazol 20 mg/kg, PO; y T3: ivermectina 0.5 mg/kg, SQ. La evaluaci贸n se realiz贸 mediante necropsia al d铆a 10 de la dosificaci贸n mediante el Test de Ensayo Controlado. Se determin贸 una eficacia de 100% para fenbendazol y oxfendazol frente a Trichuris spp y P. uncinata, en tanto que ivermectina fue 91% eficaz frente a P. uncinata y 68% contra Trichuris spp. Se concluye que, en cuyes del INIA-Cajamarca, P. uncinata y Trichuris spp fueron susceptibles a fenbendazol y oxfendazol, y resistentes a ivermectina
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