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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Dong-Hyeon (Center for One Health, College of Veterinary Medicine, Konkuk University) Jeong, Dana (Center for One Health, College of Veterinary Medicine, Konkuk University) Kim, Hyunsook (Department of Food & Nutrition, College of Human Ecology, Hanyang University) Kang, Il-Byeong (Center for One Health, College of Veterinary Medicine, Konkuk University) Chon, Jung-Whan (Division of Microbiology, National Center for Toxicological Research, US Food and Drug Administration) Song, Kwang-Young (Center for One Health, College of Veterinary Medicine, Konkuk University) Seo, Kun-Ho (Center for One Health, College of Veterinary Medicine, Konkuk University)
저널정보
한국축산식품학회 한국축산식품학회지 한국축산식품학회지 제36권 제6호
발행연도
2016.1
수록면
787 - 790 (4page)

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Kefir is a unique fermented dairy product produced by a mixture of lactic acid bacteria, acetic acid bacteria, and yeast. Here, we compared the antimicrobial spectra of four types of kefirs (A, L, M, and S) fermented for 24, 36, 48, or 72 h against eight food-borne pathogens. Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, Enterococcus faecalis, Escherichia coli, Salmonella Enteritidis, Pseudomonas aeruginosa, and Cronobacter sakazakii were used as test strains, and antibacterial activity was investigated by the spot on lawn method. The spectra, potencies, and onsets of activity varied according to the type of kefir and the fermentation time. The broadest and strongest antimicrobial spectrum was obtained after at least 36-48 h of fermentation for all kefirs, although the traditional fermentation method of kefir is for 18-24 h at $25^{\circ}C$. For kefir A, B. cereus, E. coli, S. Enteritidis, P. aeruginosa, and C. sakazakii were inhibited, while B. cereus, S. aureus, E. coli, S. Enteritidis, P. aeruginosa, and C. sakazakii were inhibited to different extents by kefirs L, M, and S. Remarkably, S. aureus, S. Enteritidis, and C. sakazakii were only inhibited by kefirs L, M, and S, and L. monocytogenes by kefir M after fermentation for specific times, suggesting that the antimicrobial activity is attributable not only to a low pH but also to antimicrobial substances secreted during the fermentation.

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