Korean journal of food and cookery science (한국식품조리과학회지)

Korean Society of Food and Cookery Science (한국식품조리과학회)
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Antimicrobial Effect of Forsythiae Fructus Extracts on Several Food-Borne Pathogens

연교 추출물의 항균활성 검색 및 일부 식중독균의 증식에 미치는 영향

  • Bae Ji-hyun (Dept. of Food Science and Nutrition, Keimyung University) ;
  • Kim Hong-youn (Dept. of Food Science and Nutrition, Keimyung University) ;
  • Jang Ji-Youn (Dept. of Food Science and Nutrition, Keimyung University)
  • 배지현 (계명대학교 식품영양학과) ;
  • 김홍연 (계명대학교 식품영양학과) ;
  • 장지연 (계명대학교 식품영양학과)
  • Published : 2005.06.01
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Abstract

This study was performed to investigate the antimicrobial effect of the Forsythiae Fructus extracts against food-borne pathogens. First, Forsythiae Fructus was extracted with methanol at room temperature and the methanol extracts were fractionated by using petroleum ether, chloroform, ethyl acetate, and methanol. The antimicrobial activity of the Forsythiae Fructus extracts was determined by using a paper disc method against food-borne pathogens and food spoilage bacteria. The methanol extracts of Forsythiae Fructus showed the highest antimicrobial activity against Salmonella paratryphimurium and Salmonella typhimurium. A synergistic effect in inhibition was observed when Forsythiae Fructus extract was mixed with Ulmus davidiana Japonica extract as compared to each extract alone. Finally, the growth inhibition curves were determined by using ethyl acetate extracts of Forsythiae Fructus against Shigella flexneri and Salmonella paratyphimurium. The aqueous extract of Forsythiae Fructus had strong antimicrobial activity against Staphylococcus epidermidis at the concentration of 10,000 ppm. At this concentration, the growth of Shigella fexneri was retarded for more than 24 hours and for up to 12 hours for Staphylococcus epidermidis. In conclusion, the methanol extracts of Forsythiae Fructus efficiently inhibited Staphylococcus epidermidis and Shigella flexneri.

본 연구에서는 식중독 유발세균에 대한 항균활성이 우수한 천연 항균성 물질을 검색하기 위해 예로부터 민간과 한방에서 널리 이용되어 온 연교를 각종 유기용매로 추출하여 식중독 유발세균에 대한 항균활성을 조사해 보았다. 연교를 petroleum ether, chloroform, ethly acetate, methanol를 이용하여 실온에서 각각 용매별로 계통 분획하고, 열수추출물을 얻은 후, 9종의 식중독 유발세균 (Staphylococcus aureus, Staphylococcus epidermidis, Salmonella paratyphimurium, Shigella flexneri, Escherichia coli, Salmonella typhimurium, Shigella dysenteriae, Pseudomonas aeruginosa, Shigella sonnei)에 대하여 항균효과를 조사하였다. 연교 추출물의 농도별 항균 활성 검색에서는 연교의 열수 추출물이 가장 큰 항균 효과를 보였으며 Staphylococcus epidermidis와 Shigella flexneri가 가장 민감하게 반응하는 균주였다. 연교의 열수 추출물과 느릅나무의 methanol 추출물을 혼합하여 항균력을 측정해 본 결과 두 추출물을 섞어 첨가했을 경우가 단독으로 사용했을 시 보다 상승효과를 나타내었다. 또한 연교의 열수 추출물이 식중독 유발세균의 성장에 미치는 효과를 검정하기 위해 Staphylococcus epidermidis 및 Shigella flexneri의 배양액에 연교의 열수 추출물을 각각 10,000 ppm 농도로 첨가했을 시, Staphylococcus epidermidis의 생육이 12시간 이상까지 억제됨을 관찰할 수 있었고, Shigella flexneri의 생육도 24시간까지 지연시킬 수 있었다. 이상의 결과 연교의 열수 추출물은 S. epidermidis와 Shigella flexneri의 성장을 효과적으로 억제시킴을 알 수 있었다.

Keywords

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