Eficácia de anti-helmínticos no controle de parasitas gastrintestinais de ovinos no Alto Sertão da Paraíba, Brasil

Abstract

<p>This project evaluated the efficiency of different anthelmintics on sheep gastrointestinal nematodes in the Alto Sertão of Paraíba state. Resistance test was conducted in two sheep farming units (P1 and P2) of Dorper and Santa Inês crossbreed sheep, which are located in Sousa microregion. Young and adult sheep of both sexes, were divided into five groups, being control group (G1), Ivermectin 0,08% (G2), Doramectin 1% (G3), Albendazole 10% (G4) and Levamisole Chloridrate 5% (G5). In P1 each group was formed by three young and three adult animals, while in P2 each group was formed by two young and three adult animals. Faeces samples were collected on the pre-treatment (D0) and post-treatment evaluation (D7, D14 and D21). In P1, the most efficient drug was Levamisole Chloridrate 5%, while the other drugs evaluated presented insufficiently active. In P2, Albendazole 10% and Levamisole Chloridrate 5% showed the highest percentages of efficiency to D7, D14 and D21. Also in P2, Ivermectin 0,08% and Doramectin 1%, to D7 and D14, were effective, with parasite reduction between 90-98%. Results obtained from larvae culture indicated that 100% of sheep helminth infections, in both farming units, were caused by Trichostrongyloidea superfamily, being Haemonchus spp.the most prevalent one (75,9%).</p>