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Braz J Microbiol ; 55(2): 1279-1286, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38652443

RESUMO

Probiotic-containing foods are among the most appreciated functional foods; however, probiotic-based dairy products cannot be consumed by people who are lactose intolerant, allergic to milk, or vegetarian or vegan individuals. Thus, new non-dairy matrices have been tested for probiotics delivery. This study evaluated the growth and viability of Limosilactobacillus fermentum ATCC 23271 and Lacticaseibacillus rhamnosus ATCC 9595 in Pitanga juice (Eugenia uniflora L.). The effects of the fermentation on the antioxidant and anti-infective properties of the juice were also analyzed. The E. uniflora juice allowed lactobacilli growth without supplementation, reaching rates around 8.4 Log CFU/mL and producing organic acids (pH values < 4) after 72 h of fermentation. The strain remained viable after 35 days of refrigerated storage. Fermentation by these bacteria increases the antioxidant capacity of the juice. The central composite rotational design was employed to evaluate the effects of bacterial inoculum and pulp concentration on growth and organic acids production by L. fermentum ATCC 23271. The strain was viable and produced organic acids in all tested combinations. L. fermentum-fermented juice and its cell-free supernatant significantly increased the survival of Tenebrio molitor larvae infected by enteroaggregative Escherichia coli 042. The results obtained in this study provide more insights into the potential of Pitanga juice to develop a functional non-dairy probiotic beverage with antioxidant and anti-infective properties.


Assuntos
Antioxidantes , Eugenia , Fermentação , Limosilactobacillus fermentum , Probióticos , Antioxidantes/farmacologia , Antioxidantes/metabolismo , Limosilactobacillus fermentum/metabolismo , Limosilactobacillus fermentum/crescimento & desenvolvimento , Limosilactobacillus fermentum/fisiologia , Limosilactobacillus fermentum/efeitos dos fármacos , Probióticos/farmacologia , Eugenia/química , Anti-Infecciosos/farmacologia , Sucos de Frutas e Vegetais/microbiologia , Sucos de Frutas e Vegetais/análise , Lacticaseibacillus rhamnosus/metabolismo , Lacticaseibacillus rhamnosus/crescimento & desenvolvimento , Lacticaseibacillus rhamnosus/efeitos dos fármacos , Viabilidade Microbiana/efeitos dos fármacos
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