Efeitos de extratos de frutos na ativação de bactérias patogênicas e ácido láticas

Abstract

The intestinal microbiota is composed of a variety of microorganisms in which some have beneficial effects while others can bring harm to the host's health. The quantity and quality of the colonies present in the intestinal microbiota are directly influenced by diet. Fruits have been the subject of research because they contain numerous bioactive compounds that may be beneficial to the human organism. Considering the above, the objective of the present study was to analyze the effect of aqueous extracts based on unconventional fruits on the growth of lactic acid bacteria with probiotic potential and pathogenic bacteria. The following fruits were tested: purple abiu (Chrysophyllum cainito); atemoia (Annona cheriola); baru (Dipteryx alata); cocoa (Theobroma cacao); cashew (Anacardium occidentale); jabuticaba (Plinia cauliflora); jambo-pink (Syzygium samarangense); pequi (Caryocar brasiliense) and tamarind (Tamarindus indica). For analysis of the effect on growth the extracts were inserted in 6 mm discs along with strains of pathogenic bacteria (Escherichia coli; Enteric Salmonella and Staphylococcus aureus) and lactic acid (Lactobacillus fermentum; Lactobacillus casei; Lactobacillus delbrueckii subsp. Bulgaricus). The tamarind extract inhibited the growth of the pathogenic bacteria tested. In relation to the lactic acid bacteria, the extract of atemoia promoted the growth of all the strains used, while the tamarind extract promoted the growth of Lactobacillus fermentum strain 30 and Lactobacillus casei strain 37. These results suggest that atemoia and tamarind fruits may benefit the human intestinal microbiota.