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Comparative analysis of the distribution of segmented filamentous bacteria in humans, mice and chickens

文献类型： 外文期刊

作者： Yin, Yeshi 1 ; Wang, Yu 1 ; Zhu, Liying 1 ; Liu, Wei 1 ; Liao, Ningbo 1 ; Jiang, Mizu 3 ; Zhu, Baoli; Yu, Hongwei D.;

作者机构： 1.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, Inst Plant Protect & Microbiol, Hangzhou 310021, Zhejiang, Peoples R China

2.Zhejiang Normal Univ, Coll Chem & Life Sci, Jinhua, Zhejiang, Peoples R China

3.Zhejiang Univ, Sch Med, Childrens Hosp, Dept Gastro

关键词： distribution;diversity;phylogenetic relationships;segmented filamentous bacteria

期刊名称：ISME JOURNAL （ 影响因子：10.302； 五年影响因子：12.284 ）

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收录情况： SCI

摘要： Segmented filamentous bacteria (SFB) are indigenous gut commensal bacteria. They are commonly detected in the gastrointestinal tracts of both vertebrates and invertebrates. Despite the significant role they have in the modulation of the development of host immune systems, little information exists regarding the presence of SFB in humans. The aim of this study was to investigate the distribution and diversity of SFB in humans and to determine their phylogenetic relationships with their hosts. Gut contents from 251 humans, 92 mice and 72 chickens were collected for bacterial genomic DNA extraction and subjected to SFB 16S rRNA-specific PCR detection. The results showed SFB colonization to be age-dependent in humans, with the majority of individuals colonized within the first 2 years of life, but this colonization disappeared by the age of 3 years. Results of 16S rRNA sequencing showed that multiple operational taxonomic units of SFB could exist in the same individuals. Cross-species comparison among human, mouse and chicken samples demonstrated that each host possessed an exclusive predominant SFB sequence. In summary, our results showed that SFB display host specificity, and SFB colonization, which occurs early in human life, declines in an age-dependent manner.

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