Barbatimão (Stryphnodendron rotundifolium Mart.) no controle dos helmintos em ovinos

Abstract

Sheep farming faces several challenges that can hinder its production, and one of these challenges is helminth infestations in flocks. In order to solve the problem, the use of commercial anthelmintics is the most adopted measure, however, several problems recur due to the indiscriminate and excessive use of these substances, such as parasitic resistance. Herbal medicines are being studied andused to combat parasitic resistance, especially from Haemonchus contortus, which brings serious economic losses and a high capacity for infestation on properties. Thus, the objectivewas to study the characteristics of barbatimão and its potential effects on ruminant productionthrough a literature review (Chapter I), based on a survey of public domain literature. The results obtained showed that the biological compounds present in barbatimão have great potential to be used in Haemonchus contortus infestation. For chapter II, the in vitro efficacy of barbatimão bark tannin on Haemonchus contortus was evaluated. Using ivermectin (positive control), distilled water (negative control) and hydroalcoholic extract of Barbatimão bark (EHCB), at concentrations of 30%, 40%, 50%, 60%, 70%, on Haemonchus contortus. In the egg hatchability test (TEO), EHCB showed an effectiveness (p < 0.05) in egg reduction (efficacy of 93.66%) compared to ivermectin. This trend of anthelmintic efficiency was verified when analyzing the inhibition of larval development, showing an efficacy (p < 0.05) when usingEHB, 98.53% in larval reduction, and an efficacy of 28.53% using ivermectin or which is considered ineffective. It can be concluded that this study provided evidence of the anthelmintic activity of the hydroalcoholic extract of barbatimão bark on gastrointestinalnematodes of naturally infested sheep, with the reducing effect observed in this study being ofgreat value in integrated parasite control programs.