Effects of cow's and goat's milk as fermentation media on the microbial ecology of sugary kefir grains

International Journal of Food Microbiology
Hsin-Hui HsiehMing-Ju Chen

Abstract

In the present study, we have investigated the importance of fermentation media on grain formation and the microbial characteristics of sugary kefir. The sugary kefir grains were fermented in brown sugar, cow's milk or goat's milk. Using culture-dependent and culture-independent methods, we identified the microorganisms present in both the grains and filtrate and then evaluated their distribution. The structure of the grains was also observed by scanning electronic microscopy (SEM). The identification results indicated that there were remarkable changes in microbial ecological profiles of the sugary kefir grains and their filtrates when brown sugar and milk were compared as fermentation media. Three lactic acid bacteria (LAB) species (Leuconostoc mesenteroides, Lactobacillus mali and Lactobacillus hordei) were found in the grains fermented using brown sugar. However, four species, named Leu. mesenteroides, Lactococcus lactis, Bifidobacterium psychraerophilum and Enterococcus faecalis, were identified in the grains fermented using either cow's or goat's milk. The size and structure of the kefir grains were also significantly influenced by the culture medium. We hypothesize that the grains originally may contain many different mi...Continue Reading

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Citations

Jan 8, 2016·International Journal of Systematic and Evolutionary Microbiology·David LaureysPeter Vandamme
Feb 18, 2014·Applied and Environmental Microbiology·David Laureys, Luc De Vuyst
Sep 6, 2013·FEMS Microbiology Letters·Alan J MarshPaul D Cotter
Mar 29, 2019·Frontiers in Microbiology·Marko VerceStefan Weckx
Mar 23, 2021·International Journal of Food Microbiology·Kieran M LynchElke K Arendt
Nov 7, 2020·Critical Reviews in Food Science and Nutrition·Mariana Buranelo EgeaAilton Cesar Lemes
May 29, 2021·Scientific Reports·Letícia Leandro BatistaCarlos Ueira-Vieira
Jun 3, 2021·Foods·Nor Farahin AziziNoorjahan Banu Alitheen

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