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A Meta-Analysis of Fecal Bacterial Diversity in Dogs

메타분석을 통한 반려견 분변 박테리아 군집 조사

  • Jeong, Jin Young (Animal Nutrition and Physiology Team, National Institute of Animal Science) ;
  • Kim, Minseok (Animal Nutrition and Physiology Team, National Institute of Animal Science)
  • 정진영 (국립축산과학원 영양생리팀) ;
  • 김민석 (국립축산과학원 영양생리팀)
  • Received : 2016.11.15
  • Accepted : 2017.01.06
  • Published : 2017.01.31
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Abstract

In this study, a meta-analysis of fecal bacteria in dogs was conducted using 16S rRNA gene sequences that have been recovered from cloning and Sanger sequencing. For this meta-analysis, we retrieved all 16S rRNA gene sequences recovered from fecal bacteria in dogs in the RDP database (Release 11, Update 3). A total of 420 sequences were identified from the RDP database, 42 of which were also recovered from cultured isolates. The 420 sequences were assigned to five phyla, of which Firmicutes was the most predominant phylum, accounting for 55.2% of all 420 sequences. Bacteroidetes was the second most predominant phylum, accounting for 32.1% of the 420 sequences, followed by Actinobacteria (6.4%), Fusobacteria (3.8%), and Proteobacteria (2.4%). The genus Bacteroides within Bacteroidetes was the largest, representing 30.0% of all 420 sequences, while the putative genus Clostridium XI within Firmicutes was the second largest, representing 27.4% of all 420 sequences. A total of 82 operational taxonomic units (OTUs) that are putative species were identified from the retrieved sequences. The results of this study will improve understanding of the diversity of fecal bacteria in dogs and guide future studies on the health and well-being of dogs.

본 연구에서는 클로닝과 생어 염기서열 분석으로 획득된 16S rRNA 유전자 염기서열을 메타분석하여 반려견 분변 박테리아를 조사하였다. 이러한 메타분석을 위해서 RDP 데이터베이스(Release 11, Update 3)에 등록되어 있는 반려견 분변 박테리아 유래 16S rRNA 유전자 염기서열 검색하여 획득하였다. RDP 데이터베이스에서 총 420개의 반려견 분변 박테리아 유래 16S rRNA 유전자 염기서열이 확인되었고, 그 중에서 42개 유전자 염기서열이 배양가능한 박테리아에서 유래한 것으로 확인되었다. 이러한 420개의 유전자 염기서열은 박테리아 분류학상의 '문'(phylum)에서 총 5개(Firmicutes, Bacteroidetes, Actinobacteria, Fusobacteria, Proteobacteria)로 분류되었다. 그 중에서 Firmicutes가 가장 우점하는 '문'이었고, 총 420개 유전자 중에서 55.2%를 차지하였다. Bacteroidetes는 32.1%로 두 번째로 우점하는 '문'이였고, 다음으로 Actinobacteria(6.4%), Fusobacteria(3.8%), Proteobacteria(2.4%)가 우점하였다. 박테리아 분류학상의 '속'(genus)에서는 Bacteroidetes의 하위 단계인 Bacteroides가 가장 우점하였고 총 420개 유전자 중에서 30.0%를 차지하였다. 반면에 Firmicutes의 하위 단계인 Clostridium XI는 두 번째로 우점하는 '속'으로 총 420개 유전자 중에서 27.4%를 차지하였다. 추정상의 '종'(species)인 Operational taxonomic units의 수는 82개로 확인되었다. 본 연구의 결과는 반려견 분변 내 미생물 다양성을 이해하는데 도움을 줄 수 있을 것이고, 향후 반려견의 건강과 웰빙에 관한 연구에 활용될 수 있을 것이다.

Keywords

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