The Journal of General and Applied Microbiology
Online ISSN : 1349-8037
Print ISSN : 0022-1260
ISSN-L : 0022-1260
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Identification and characterization of the dominant lactic acid bacteria from kurut: The naturally fermented yak milk in Qinghai, China
Zhihong SunWenjun LiuWa GaoMei YangJiachao ZhangLan WuJunguo WangBilige MengheTiansong SunHeping Zhang
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2010 Volume 56 Issue 1 Pages 1-10

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Abstract

Forty-three samples of kurut, a kind of traditional naturally-fermented yak milk, were collected in Qinghai, China. One hundred and forty-eight lactic acid bacterial (LAB) strains were isolated and identified from the kurut samples according to phenotypic characterization and 16S rRNA gene sequence analysis. Among them, 52 isolates belonged to the Lactobacillus strains. Ninety-six isolates were resolved to coccoid LAB. The results showed that these isolates belonged to five genera and thirteen different species and subspecies. Moreover, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus were the predominant population in these samples. This paper systematically studied the composition of LAB in kurut, which may provide raw data for further study involving probiotics strain selection and starter culture design for industrialization production of traditional fermented milk in the future.

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© 2010 by The Applied Microbiology, Molecular and Cellular Biosciences Research Foundation
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