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Subject

Antimicrobial activity of bacterial isolates against microbial residents on human skin and pathogenic bacteria
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인간 피부 상재균과 병원성 세균에 대한 분리세균들의 항균활성

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Type
Academic journal
Author
Da-Sol Lee (강원대학교) Hong-Gyu Song (강원대학교)
Journal
The Microbiological Society of Korea Korean Journal of Microbiology Vol.55 No.4 KCI Accredited Journals SCOPUS
Published
2019.12
Pages
385 - 391 (7page)

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Antimicrobial activity of bacterial isolates against microbial residents on human skin and pathogenic bacteria
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Propagation of microorganisms in cosmetics and foodstuffs not only deteriorates the quality of the products but also can cause various diseases in human. The aim of this study is to evaluate the antimicrobial activity of substances produced by isolated bacteria Burkholderia gladioli DS518, Streptomyces lienomycini DS620, and Paenibacillus elgii DS1515 against several microbial residents on human skin and pathogenic bacteria. Three strains showed large inhibition zone diameters up to 35.3 mm against target microorganisms in agar well diffusion assay. Crude extracts of antimicrobial substances (proteins and antibiotics) from the bacterial cultures were highly effective against most target microbes with low minimum inhibitory concentration (MIC). Especially, antimicrobial substances from strain DS620 showed the lowest MIC of 0.0156~0.0625 μg/ml against Micrococcus luteus and Enterococcus faecalis strains. Antimicrobial substances of isolated bacteria completely killed 10<SUP>5</SUP>~10<SUP>6</SUP>cells/ml of target microorganisms during 24 h, and they were stable at broad range of temperature and pH and in the presence of urea and surfactants.

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