Kefir, a fermented dairy beverage, exhibits antimicrobial activity due to many metabolic products, including bacteriocins, generated by lactic acid bacteria. In this study, the antimicrobial activities of artisanal kefir products from Fusion Tea (A), Britain (B), Ireland (I), Lithuania (L), the Caucuses region (C), and South Korea (K) were investigated against select foodborne pathogens. Listeria monocytogenes CWD 1198, Salmonella enterica serovar Enteritidis ATCC 13076, Staphylococcus aureus ATCC 25923, and Bacillus cereus ATCC 14579 were inhibited by artisanal kefirs made with kefir grains from diverse origins. Kefirs A, B, and I inhibited all bacterial indicator strains examined at varying levels, except Escherichia coli ATCC 12435 (non-pathogenic, negative control). Kefirs K, L, and C inhibited all indicator strains, except S. aureus ATCC 25923 and E. coli ATCC 12435. Bacteriocins present in artisanal kefirs were determined to be the main antimicrobials in all kefirs examined. Kefir-based antimicrobials are being proposed as promising natural biopreservatives as per the results of the study.

中文翻译：

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六种国际手工开菲尔对蜡样芽孢杆菌、单核细胞增生李斯特菌、肠炎沙门氏菌和金黄色葡萄球菌的抗菌活性。


开菲尔是一种发酵乳饮料，由于乳酸菌产生的许多代谢产物（包括细菌素）而表现出抗菌活性。在这项研究中，对来自 Fusion Tea (A)、英国 (B)、爱尔兰 (I)、立陶宛 (L)、高加索地区 (C) 和韩国 (K) 的手工开菲尔产品的抗菌活性进行了调查，以选择食源性病原体。使用不同来源的开菲尔颗粒制成的手工开菲尔可抑制单核细胞增生李斯特菌CWD 1198、肠炎沙门氏菌ATCC 13076、金黄色葡萄球菌ATCC 25923 和蜡样芽孢杆菌ATCC 14579。除大肠杆菌ATCC 12435（非致病性阴性对照）外，开菲尔 A、B 和 I 均以不同水平抑制所有细菌指示菌株。开菲尔 K、L 和 C 抑制除金黄色葡萄球菌ATCC 25923 和大肠杆菌ATCC 12435 之外的所有指示菌株。手工开菲尔中存在的细菌素被确定为所有检查的开菲尔中的主要抗菌剂。根据研究结果，基于开菲尔的抗菌剂被认为是有前途的天然生物防腐剂。