Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Antibacterial Activity by Lactobacillus bulgaricus SP5 against Pathogenic Bacteria

병원성 미생물에 대한 Lactobacillus bulgaricus SP5의 항균활성

  • 김완섭 (한경대학교 동물생명환경과학과) ;
  • 양아름 (한경대학교 동물생명환경과학과)
  • Received : 2016.04.25
  • Accepted : 2016.07.11
  • Published : 2016.08.31
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Abstract

This study was carried out to get basic resources for the industrial use of Lactobacillus bulgaricus SP5. The antibacterial activity of the supernatant obtained from Lactobacillus bulgaricus SP5 was tested against the pathogenic bacteria such as Escherichia coli KCCM 11234, Salmonella enteritidis KCCM 3313, Salmonella enteritidis KCCM 12021, and Salmonella typhimurium KCCM 40253. The supernatant of L. bulgaricus SP5 showed antibacterial activity against tested pathogenic bacteria. The antibacterial activity was examined after adjusting pH and heat treatment of supernatant. Heat treatment of supernatant had antibacterial activity against pathogenic bacteria at all temperature. However, pH changes showed no antibacterial activity. Antibacterial activity of the supernatant was confirmed to be due to organic acids (lactic, acetic, phosphoric, succinic, pyroglutamic, citric, malic, and formic acid).

본 연구는 Lactobacillus bulgaricus SP5 분비물의 항균물질 탐색과 특성을 조사하고 병원성 미생물에 대한 억제효과를 얻고자 실시하였다. L. bulgaricus로부터 얻어진 상징액에 대한 항균활성은 시험에 이용된 모든 병원성 미생물인 E. coli 11234, Salmonella. enteritidis 3313, S. enteritidis 12021, 그리고 S. typhimurium 40253에 대해서 항균활성을 가지는 것으로 나타났다. 상징액 중의 황균활성 성분을 확인하기 위하여 다양한 pH 조정과 열처리 후, 병원성 미생물에 대한 항균활성을 측정하였다. 상징액의 열처리 후, 병원성미생물에 대한 항균활성은 비열처리와 같은 항균활성을 나타내었으나, 상징액의 pH를 4.6에서 중성이상으로의 변화는 항균활성이 현저히 감소하였다. 따라서 상징액의 항균활성은 pH 변화에 대해서 불안정하였으나, 열에 대해서는 매우 안정한 것으로 밝혀졌다. 이상의 결과를 통해 상징액의 병원성균에 대한 항균작용은 박테리오신 같은 peptide 보다는 lactic, acetic, phosphoric, succinic, pyroglutamic, citric, malic, 그리고 formic acid 등 다양한 유기산의 작용에 의한 것으로 확인되었다.

Keywords

References

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