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KMID : 1134820070360040470
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Journal of the Korean Society of Food Science and Nutrition
2007 Volume.36 No. 4 p.470 ~ p.475
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Antimicrobial Activities of Scutellaria baicalensis Georgi Against Various Pathogens and Spoilage Bacteria Isolated from Tofu
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Woo In-Taeck
Park Kyeung-Nam
Lee Shin-Ho
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Abstract
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Antibacterial activities of Scutellaria baicalensis Georgi (SBG) extract were examined against spoilage bacteria isolated from commercial tofu and various pathogens such as Listeria monocytogenes ATCC 19115, Pseudomonas fluorescens ATCC 21541, Staphylococcus aureus ATCC 29737, Salmonella Typhimurium ATCC 11806, Vibrio parahaemolyticus ATCC 17802, and Aeromonas hydrophila KCTC 2358. Four kinds of spore forming organisms were isolated from commercial tofu and identified as Bacillus sp. KN-4, Bacillus sp. KN-6, Bacillus sp. KN-10 and Bacillus sp. KN-20 using API CHB kit. The SBG extract showed high antibacterial activities and significantly inhibited the growth of the isolated spoilage bacteria and pathogens. The inhibitory effects against the organisms increased as the concentration of the SBG extract increased. The antimicrobial activities of the SBG extract were maintained markedly after heat treatments (80℃/30 min, 100℃/30 min and 121℃/15 min). The minimum inhibitory concentrations (MIC) of the SBG extract against the organisms ranged from 1,000 ppm to 5,000 ppm.
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KEYWORD
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Scutellaria baicalensis Georgi, antimicrobial acitivity, pathogens, spoilage bacteria, tofu
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