Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Characterization of Bacillus polyfermenticus SCD for Oral Bacteriotherapy of Gastrointestinal Disorders

식품용 프로바이오틱 비스루트균의 주요 생균제 특성

  • Published : 2002.02.01
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Abstract

Bacillus polyfermenticus SCD, which is commonly called as Bisroot strain, is being used for functional foods through the treatment of long-term intestinal disorders, since the live strains in the form of active endospores can successfully reach the target intestine in both humans and animals. The cells of B. polyfermenticus SCD were treated for 24 h in artifical bile after incubation for 2 h in artificial gastric juice and final number of the strain was reached to around $3.3{times}10^7\;CFU/mL$. In test of API ZYM kit, ${\beta}-glucuronidase$ or ${\beta}-glucosidase$ was not produced by B. polyfermenticus SCD. B. polyfermenticus SCD was resistant to antibiotics, such as nisin, streptomycin, tetracycline, and rifamycin. B. polyfermenticus SCD was also affected by alcohol concentration up to 4%, but more than 8%, their growth was not affected significantly. Finally, B. polyfermenticus SCD was shown to inhibit the growth of Listeria monocytogenes ATCC 19111 completely within 24 h of incubation, which indicated its bactericidal nature.

본 연구에서는 식품용 프로바이토틱 생균인 비스루트균의 인공위액과 인공담즙산에 대한 내성, 효소활성, 항생물질과 알콜에 대한 내성, 그리고 병원성 세균에 대한 항균기작 등 주요 생균제 특성에 대하여 검토하였다. 인공위액 내성 실험에서는 pH 2.5로 조성된 인공위액을 통과한 생존율이 매우 높았으며 균수가 $2.4{\times}10^7\;CFU/mL$의 수준이었다. 인공담즙산에 대한 내성에서는 pH 2.5의 인공위액을 통과한 비스루트균의 인공담즙산의 내성은 oxgall이 함유되지 않은 대조구$(1.6{\times}10^7\;CFU/mL)$에 비해 오히려 균수가 증가되었으며, 최종적인 생존수가 $3.3{\times}10^7\;CFU/mL$ 으로 확인됨으로써 프로바이오틱 생균으로 매우 우수한 특성을 가지고 있었다. 효소활성을 측정한 결과, 비스루트균은 발암효소인 ${\beta}-glucuronidase$ 및 ${\beta}-glucosidase$ 의 활성이 나타나지 않았다. 또한 항생물질에 대한 내성은 rifamycin $10\;{\mu}g/mL$ 이상의 농도에 대해서는 생육 저해를 보였으나, $nisin(100\;{\mu}g/mL)$, $streptomycin(20\;{\mu}g/mL)$, $tetracycline(20\;{\mu}g/mL)$에 대해 내성을 보였다. 그리고 비스루트균의 알콜에 대한 내성은 4%의 농도에서 저해를 받았으며, 8%의 농도에서 더욱 저해를 받으나, $8{\sim}32%$ 범위의 농도에서는 균수가 더욱 크게 감소를 하지는 않았다. Listeria에 대한 향균기작을 측정한 결과, 24시간이내에 L. monocytogenes ATCC 19111을 완전히 저해를 하였으며, bactericidal한 양상을 나타내었다. 본 연구를 통해 밝혀진 비스루트균의 프로바이오틱 특성은 기능성 식품의 개발 등 산업적으로 매우 유용하다고 판단된다.

Keywords

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