Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Antimicrobial Activity of Caesalpinia sappan against Animal husbandry disease.

가축질병 균주에 대한 소목의 항균활성

  • 이성규 (상지 대학교 생명산업학과)
  • Published : 2003.09.01
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Abstract

Antimicrobial activity of Caesalpina sappan L. extract (CS extract) against animal husbandry disease-related bacteria was studied. The CS extracts showed a significant antimicrobial activity against Gram(+) bacteria and this antimicrobial activity was most significant against Staphylococcus epidermidis. Minimum inhibitory concentrations (MIC) of CS was in the range of 0.8∼16 mg/ml and 0.8∼10 mg/ml, in the case of MeOH extracts and EtOH extracts, respectively. In addition, the antimicrobial activity of each solvent fraction was most significant with EtOAc layer. The antimicrobial activities of CS extracts against most microbial strains were stable by either heat treatment or acid treatment, whereas those against S. aureus and Sal. typhimurium were reduced by acid treatment. The inhibitory effect of CS extracts on microbial cell growth was further examined by the addition of 0, 100, 300, and 500 ppm of CS extracts into growth medium. The growth of gram(+) bacteria, S. aureus and S. epidermidis, was inhibited for 72 hours in all ranges of CS extracts added, but the growth of gram(-) bacteria was only inhibited when at least 100 ppm of CS extracts were added. Taken together, the antimicrobial activities of CS extracts were more effective against gram(+) bacteria compared to those against gram(-) bacteria.

소목추출물을 제조하여 가축질병에 관련이 있는 균에 대한 항균활성을 조사하였다. 소목추출물은 그람양성균에 대해 높은 항균활성을 보였으며 그 중 S. epidermidis에서 가장 높은 항균활성을 보였다. 소목추출물의 최소저해농도는 MeOH추출물은 0.8∼16 mg/ml 범위였으며 EtOH츤출물은 0.8∼10 mg/ml농도에서 항균활성을 보였으며 소목 분회물의 항균활성은 EtOAc층이 가장 높은 활성을 나타냈다. 열에 의한 항균활성 변화에 있어서는 대부분의 균주에서 항균력은 안정적이며 pH에 의한 항균활성의 변화에서 S.aureus와 Sal. typhimurum에서 산 처리 시 감소하는 경향을 보였으나 대부분의 균주에서 안정적이었다. 소목 추출물의 미생물증식억제 효과를 조사하기 위해 증식배지에 0, 100, 300및 500 ppm의 추출물을 첨가하여 균주의 증식 억제효과를 조사하였다. 그람양성균인 S. aureus 와 S. epidermidis는 첨가농도에 관계없이 배양 후 72시간까지 증식이 정지된 상태를 보였으며 그람 음성균에서는 100ppm이상 첨가 시 증식이 저지되거나 억제효과가 있었다. 이런 결과를 종합하면 소목 추출물은 그람음성균에 비해 그람양성균에 더욱 효과적인 항균활성이 있다고 보여 진다.

Keywords

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