Avaliação da eficácia anti-helmínticos comerciais no controle de parasita gastrointestinais de ovinos em propriedade rural no município de Paulistana-PI

Abstract

Sheep farming is an old practice in the Brazilian territory and most of the breeders of these animals are located in the Northeast of Brazil in family farming, being a source of income for them, however, the main responsible for economic losses in the production of these animals are gastrointestinal endoparasites that affect the productive performance of the herd. Thus, the present research aimed to evaluate the efficacy of anthelmintics commonly used by farmers in Paulistana-PI, through the reduction of eggs per gram of feces (OPG) in crossbred sheep using four anthelmintics widely used in parasitological control. Twenty-five sheep were used, divided into 5 groups, according to parasitological evaluation screening taking into account the average OPG. Group 0 were untreated animals, group 1 received treatment with Ivermectin 0.2% (orally), group 2 received treatment with Doramectin 1% (subcutaneous), group 3 received treatment with Albendazole 10% (orally), and group 4 received treatment with Levamisole Hydrochloride 5% (orally). It was observed that only ivermectin 0.2% was efficient for the treatment of gastrointestinal helminths in sheep, while doramectin 1% and albendazole 10% were inefficient for the treatment of worms, and levamisole hydrochloride 5% was moderately effective on the farm. These results point to the occurrence of anthelmintic resistance in ovine farms in the city of Paulistana, an aggravating factor for the control of worms, as well as the need to evaluate the situation of anthelmintic resistance in ovine herds in the Paulistana-PI.