Eficácia de extratos vegetais para o controle da helmintose ovina,no Norte de Minas Gerais

Abstract

The quick selection of nematodes resistant to anthelmintics has reduced the success of gastrointestinal helminthiasis control in small ruminants in several countries, demanding the search of new alternative treatments. Researches using plant extracts for this control have demonstrated promising results. The aim of this work was to evaluate anthelmintic properties against sheep nematodes from different plant species frequently found in the North of Minas Gerais, Brazil. The species Anacardium humile, Annona crassiflora, Campomanesia cambessedeana, Caryocar brasilliense, Genipa americana,Hancornia spp., Hymenaea stigonocarpa, Mangifera indica, Magoniapubescens and Tamarindus indica were tested in vitro on the larvaldevelopment of sheep trichostrongylides. Larvae of Haemonchus (68%),Strongyloides (31%) e Trichostrogylus (1%) were identified in the coproculture of the control group with distilled water. The water extract of the seeds A. crassiflora, panã, aqueous and ethanolic extracts of Caryocar brasilliense, pequi and the ethanolic extracts of Genipa americana, genipap and fruit of Mangifera indica showed efficacy (%) of 99,4, 99,8, 98,5, 100 and 100 respectively. These extracts did not differ statistically from the coproculture group treated with ivermectin (p<0.01). The results obtained in this study indicate the promising anthelmintic potential of these four vegetal species (A. crassiflora, C. brasilliense, G. americana and M. indica), present in the North Minas, as a possible alternative to synthetic anthelmintics.