Abstract
The aim of this study was to isolate Enterococcus faecium from raw milk samples, to characterize its antimicrobial metabolites, and to evaluate its viability in a probiotic Minas Frescal cheese. For this, antagonist activity against Listeria monocytogenes, safety aspects and biochemical, genotypic, and probiotic characteristics of the isolates were evaluated. Minas Frescal cheese was manufactured with the isolate that showed the best characteristics in vitro, and its viability in the product was evaluated. It was observed that of the 478 lactic acid bacteria isolates, only isolate E297 presented antagonist activity, genes encoding for enterocin production and absence of virulence factors. Besides that, E297 presented probiotic characteristics in vitro, and maintained its viability (8.09 log CFU mL−1) for 14 days of cold storage, when it was added to cheese. Therefore, isolate E297 can be considered a promising microorganism for the manufacture of probiotic foods, especially Minas Frescal cheese.
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This study was financed in part by Coordenação de Aperfeiçoamento Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001. The authors would like to thank FAPERGS and CNPq (309101/2016-6) for their financial support for the research.
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Schittler, L., Perin, L.M., de Lima Marques, J. et al. Isolation of Enterococcus faecium, characterization of its antimicrobial metabolites and viability in probiotic Minas Frescal cheese. J Food Sci Technol 56, 5128–5137 (2019). https://doi.org/10.1007/s13197-019-03985-2
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DOI: https://doi.org/10.1007/s13197-019-03985-2