Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Diversity and Characteristics of the Meat Microbiological Community on Dry Aged Beef

  • Ryu, Sangdon (Department of Animal Science and Institute of Milk Genomics, Chonbuk National University) ;
  • Park, Mi Ri (Department of Animal Science and Institute of Milk Genomics, Chonbuk National University) ;
  • Maburutse, Brighton E. (Department of Animal Science and Institute of Milk Genomics, Chonbuk National University) ;
  • Lee, Woong Ji (Department of Animal Science and Institute of Milk Genomics, Chonbuk National University) ;
  • Park, Dong-Jun (Korea Food Research Institute) ;
  • Cho, Soohyun (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Hwang, Inho (Department of Animal Science and Institute of Milk Genomics, Chonbuk National University) ;
  • Oh, Sangnam (Department of Functional Food and Biotechnology, Jeonju University) ;
  • Kim, Younghoon (Department of Animal Science and Institute of Milk Genomics, Chonbuk National University)
  • Received : 2017.08.30
  • Accepted : 2017.10.21
  • Published : 2018.01.28
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Abstract

Beef was dry aged for 40-60 days under controlled environmental conditions in a refrigerated room with a relative humidity of 75%-80% and air-flow. To date, there is little information on the microbial diversity and characteristics of dry aged beef. In this study, we explored the effect of change in meat microorganisms on dry aged beef. Initially, the total bacteria and LAB were significantly increased for 50 days during all dry aging periods. There was an absence of representative foodborne pathogens as well as coliforms. Interestingly, fungi including yeast and mold that possess specific features were observed during the dry aging period. The 5.8S rRNA sequencing results showed that potentially harmful yeasts/molds (Candida sp., Cladosporium sp., Rhodotorula sp.) were present at the initial point of dry aging and they disappeared with increasing dry aging time. Interestingly, Penicillium camemberti and Debaryomyces hansenii used for cheese manufacturing were observed with an increase in the dry aging period. Taken together, our results showed that the change in microorganisms exerts an influence on the quality and safety of dry aged beef, and our study identified that fungi may play an important role in the palatability and flavor development of dry aged beef.

Keywords

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