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Identification and Probiotic Properties of Lactococcus lactis NK24 Isolated from Jeot-gal, a Korean Fermented Food  

Lee, Na-Kyoung (Korea Food Research Institute)
Kim, Tae-Hoon (Division of Animal Life Science, Konkuk University)
Choi, Shin-Yang (Korea Food Research Institute)
Lee, Si-Kyung (Department of Applied Biology and Chemistry, Konkuk University)
Paik, Hyun-Dong (Division of Animal Life Science, Konkuk University)
Publication Information
Food Science and Biotechnology / v.13, no.4, 2004 , pp. 411-416 More about this Journal
Abstract
Phenotypic characteristics and 16S rDNA sequences of isolate NK24 from Jeot-gal, Korean fermented food, were investigated. Isolate NK24 showed very close similarity to Lactococcus lactis and was tentatively named as L. lactis NK24. L. lactis NK24 was highly resistant against artificial gastric acid and bile juices. When measured by API ZYM kit, ${\beta}$-glucuronidase was not produced. This strain was resistant to antibiotics such as nisin, gentamycin, rifampicin, and streptomycin. In antimicrobial activity test, L. lactis NK24 showed inhibition on growths of most spoilage and pathogenic microorganisms, completely inhibiting Helicobacter pylori KCTC 2948 within 1 hr incubation. L. lactis NK24 showed strong adherence to Caco-2 cells. These results indicate L. lactis NK24 could be used as a probiotic strain.
Keywords
probiotics; Lactococcus lactis NK24; identification; probiotic property; Helicobacter pylori; Caco-2;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 6  (Related Records In Web of Science)
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