Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Screening of Thermotolerant Yeast for Use as Microbial Feed Additive

  • Lee, Jae-Heung (Department of Food and Life Science, Faculty of Life Science and Technology, Sungkyunkwan University) ;
  • Lim, Yoo-Beom (NEL Biotech Co., Ltd) ;
  • Koh, Jong-ho (NEL Biotech Co., Ltd) ;
  • Baig, Soon-Yong (Department of Food and Life Science, Faculty of Life Science and Technology, Sungkyunkwan University) ;
  • Shin, Hyung-Tai (Department of Food and Life Science, Faculty of Life Science and Technology, Sungkyunkwan University)
  • Published : 2002.02.01
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Abstract

With the objective of identifying the commercial potential of new direct-fed microbials, several temperature-tolerant strains were isolated from cane molasses at $39^{\circ}C$ and tested for their tolerance to pH, bile salts, and a mixture of volatile fatty acids (acetic acid:propionic acid:butyric acid=6.5:2.0:1.5). It was found that the isolated strain DY 252 grew very well up to pH 2.0 and was resistant to relatively high concentrations of bile salts. Among the strains tested, DY 252 was least inhibited by the addition of volatile fatty acids to the growth medium at $39^{\circ}C$. Accordingly, it would appear that strain DY 252, identified as yeast Issatchenkia orientalis, may be a potential candidate for use as a microbial feed additive.

Keywords

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