Hop resistance and beer-spoilage features of foodborne Bacillus cereus newly isolated from filtration-sterilized draft beer

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• 作者：Wei Wang ; Yawen Liu ; Zhen Sun ; Guocheng Du ; Xianzhen Li
• 关键词：Bacillus cereus ; Hop resistance ; Beer spoilage ; Isolation ; Foodborne
• 刊名：Annals of Microbiology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：67
• 期：1
• 页码：17-23
• 全文大小：
• 刊物主题：Microbiology; Microbial Genetics and Genomics; Microbial Ecology; Mycology; Medical Microbiology; Applied Microbiology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1869-2044
• 卷排序：67

文摘

To meet consumer demands for fresher and healthier foods, the pasteurization of beer has largely been replaced by membrane filtration methods. Research on beer spoilage caused by hop-resistant bacteria is thus of great interest. In this context, we have isolated a beer-spoilage strain of bacteria from turbid bottled beer treated by membrane filter sterilization, which we identified as Bacillus cereus strain 3012. Strain 3012 was able to produce acids and bioamines, resulting in a change in the flavor profile of the beer. Unlike other known strains of B. cereus, this isolate was resistant to hop compounds present in the beer and was in an evolutionarily stable state in terms of hop resistance. Our results suggest that this hop-resistant B. cereus strain 3012 is a foodborne pathogen with the potential to cause beer-spoilage incidents in the brewing industry.