Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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In vitro antibacterial activities of Pozzolan as a dietary silicate minerals supplementation to animals

가축에 대한 보조사료 규산염제로서 포졸란의 in vitro 항균 효과

  • Kim, Chang-Hyun (School of Animal Life Convergence Science, Hankyong National University) ;
  • Um, Kyung-Hwan (College of Animal Life Sciences, Kangwon National University) ;
  • Park, Byung-Sung (College of Animal Life Sciences, Kangwon National University)
  • 김창현 (한경대학교 동물생명융합학부) ;
  • 엄경환 (강원대학교 일반대학원) ;
  • 박병성 (강원대학교 동물생명과학대학)
  • Received : 2020.08.01
  • Accepted : 2020.08.20
  • Published : 2020.08.31
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Abstract

The purpose of this study was to investigate in vitro antibacterial activities of pozzolan against super bacteria and intestinal bacteria. There were four treatment groups: 1) CON, pozzolan free control group; 2) DP0.3, microbial culture medium prepared by mixing distilled water and 0.3% of pozzolan powder; 3) DP0.5, microbial culture medium prepared by mixing distilled water and 0.5% of pozzolan powder; and 4) PE, microbial culture medium prepared with pozzolan powder extracts without adding distilled water. The count of Lacctobacillus casei was significantly higher in the DP0.3 group compared to CON (P<0.05). However, it showed no significant difference compared to other treatment groups. Numbers of Clostridium butyricum, Escherichia coli, and Salmonella typhimurium were significantly lower in pozzolanic treatment groups compared to CON (P<0.05). Clostridium butyricum and Salmonella typhimurium counts were significantly different among DP0.3, DP0.5, and PE groups (P<0.05). Counts of E. coli were also significantly between DP0.5 and PE groups (P<0.05). Counts of MRSA and VRE were significantly lower in pozzolanic treatment groups compared to CON (P<0.05). MRSA counts were significantly different among DP0.5, DP0.3 and PE groups. VRE counts were significantly higher in the order of PE > DP0.3> DP0.5> CON (P<0.05). These results suggest that pozzolan could be used as a dietary silicate supplement and a natural antibacterial agent for livestock if its antimicrobial activity against super bacteria and harmful bacteria in the intestine is confirmed.

본 연구의 목적은 포졸란의 항생제 내성균과 장내 유해 미생물 억제에 관한 체외배양 항균 활성을 조사하는 것이었다. 대조군 (CON, 포졸란 무첨가 대조군)과 DP0.3 (증류수와 포졸란 분말 0.3%를 혼합하여 제조한 배지군), DP0.5 (증류수와 포졸란 분말 0.5%를 혼합하여 제조한 배지군), PE (포졸란 분말 추출물을 이용하여 제조한 배지군)으로 구분하였다. Lacctobacillus casei 균수는 CON과 비교할 때 DP0.3 처리군에서 유의하게 높았으나 (P<0.05) 기타 처리구 사이의 차이는 없었다. Clostridium butyricum, E. coli, Salmonella typhimurium 균수는 CON과 비교할 때 포졸란 처리구가 유의하게 낮았다 (P<0.05). Clostridium butyricum, Salmonella typhimurium 균수는 DP0.3, DP0.5와 PE 사이, E. coli 균수는 DP0.5와 PE 사이의 유의차가 있었다 (P<0.05). MRSA와 VRE의 균수는 CON과 비교할 때 포졸란 처리구가 유의하게 낮았다 (P<0.05). MRSA 균수는 DP0.5와 DP0.3, PE 사이의 차이가 있었고, VRE 균수는 PE> DP0.3> DP0.5> CON 처리구 순서로 유의하게 높았다(P<0.05). 이와 같은 결과를 통해 포졸란의 항생제 내성균 및 장내 유해 미생물에 대한 항균활성이 확인됨에 따라 가축용 천연항균제, 보조사료 규산염제로써의 활용이 가능할 것으로 보인다.

Keywords

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