Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Screening and Isolation of Chitinase and Chitosanase Producing Microbes from the Feces of Korean Native Calves Medicated DFMs Including Chitin

키틴함유 DFMs 급여 한우송아지 분변내 키틴 및 키토산분해효소 생산 미생물 선발 및 동정

  • Kim, Tae-Il (Hanwoo Experiment Station, National Institute of Animal Science, RDA) ;
  • Kwon, Eung-Gi (Hanwoo Experiment Station, National Institute of Animal Science, RDA) ;
  • Kim, Hyeong-Cheol (Hanwoo Experiment Station, National Institute of Animal Science, RDA) ;
  • Cho, Young-Moo (Hanwoo Experiment Station, National Institute of Animal Science, RDA) ;
  • Park, Byung-Ki (Hanwoo Experiment Station, National Institute of Animal Science, RDA) ;
  • Lee, Won-Kyu (Han Dong Co. Ltd) ;
  • Im, Seok-Ki (Hanwoo Experiment Station, National Institute of Animal Science, RDA)
  • 김태일 (농촌진흥청 국립축산과학원) ;
  • 권응기 (농촌진흥청 국립축산과학원) ;
  • 김형철 (농촌진흥청 국립축산과학원) ;
  • 조영무 (농촌진흥청 국립축산과학원) ;
  • 박병기 (농촌진흥청 국립축산과학원) ;
  • 이원규 ((주)한동) ;
  • 임석기 (농촌진흥청 국립축산과학원)
  • Received : 2009.09.04
  • Accepted : 2009.10.20
  • Published : 2009.10.01
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Abstract

This study was carried out to screen and identify the chitinase and chitosanase producing microorganisms from the feces of calves medicated DFM sincluding chitin in order to do the immune fortification of Korean Native calves. Ten isolates were grown in the medium containing chitin and chitosan that had more than $10^5$ cfu/g in feces. Among these 10 strains, 2 strains (HANDI 110 and HANDI 309) had the chitinase activities and 2 strains (HANWOO and HANYOO) had the chitosanase activities in calves' feces. They showed no reaction in hemolysis tests by utilizing chitin and chitosan. The results from morphological, physicochemical and genetical identification indicated the HANDI 110 as a strain of Escherichia fergusonii, HANDI 309 was identified as a strain of Acinetobacter parvus, HANWOO was identified as a strain of Comamonas koreensis, and HANYOO as a strain of Chryseobacterium indologenes.

본 연구는 키틴으로부터 면역증강물질인 N-acetyl-Dglucosamine을 축적시킴으로써 동물의 면역력을 향상시켜 폐사율을 줄이고자 키틴이 함유된 DFM을 급여한 생후 3~7개월령된 한우 송아지의 분변에서 키틴분해 효소능을 가진 미생물을 분리 동정하기 위해서 수행하였다. 송아지 분변 1g당 키틴이 함유된 배지상에서 $10^5$ 이상의 집락이 형성된 10균주 중 키틴을 분해하는 2균주와 키토산을 분해하는 2균주를 선발하였으며 이들은 모두 용혈성을 갖지 않는 것으로 나타났다. 키틴을 분해하는 균주는 선발한 4균주 모두 그람 음성균으로서 HANDI 110과 HANDI 309는 키틴을 분해하는 균주로 선발되었으며 HANWOO와 HANYOO는 키토산을 분해하는 균주로 선발되었다. 분리된 미생물은 형태학적, 물리화학적 및 유전학적 분류를 통해 HANDI 110는 Escherichia fergusonii으로, HANDI 309는 Acinetobacter parvus으로, HANWOO는 Comamonas koreensis으로 HANYOO는 Chryseobacterium indologenes으로 각각 동정하였다.

Keywords

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