Cited by 1,490Gut microbiota and healthMicrobial Community Ecology and PhysiologyGenomics and Phylogenetic Studies

Direct analysis of genes encoding 16S rRNA from complex communities reveals many novel molecular species within the human gut

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Suau, Antonia, Bonnet, Régis, Sutren, Malène, Godon, Jean-Jacques, Gibson, Glenn R., Collins, Matthew D., Doré, Joel·1999·Applied and Environmental Microbiology

Abstract

The human intestinal tract harbors a complex microbial ecosystem which plays a key role in nutrition and health. Although this microbiota has been studied in great detail by culture techniques, microscopic counts on human feces suggest that 60 to 80% of the observable bacteria cannot be cultivated. Using comparative analysis of cloned 16S rRNA gene (rDNA) sequences, we have investigated the bacterial diversity (both cultivated and noncultivated bacteria) within an adult-male fecal sample. The 284 clones obtained from 10-cycle PCR were classified into 82 molecular species (at least 98% similarity). Three phylogenetic groups contained 95% of the clones: the Bacteroides group, the Clostridium coccoides group, and the Clostridium leptum subgroup. The remaining clones were distributed among a variety of phylogenetic clusters. Only 24% of the molecular species recovered corresponded to described organisms (those whose sequences were available in public databases), and all of these were established members of the dominant human fecal flora (e.g., Bacteroides thetaiotaomicron, Fusobacterium prausnitzii, and Eubacterium rectale). However, the majority of generated rDNA sequences (76%) did not correspond to known organisms and clearly derived from hitherto unknown species within this human gut microflora.

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Crossref · 10.1128/aem.65.11.4799-4807.1999

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  • Detection and identification of translocated bacteria and characterisation of collapsing gut communities are no longer limited by insensitive culture-based techniques, which cannot detect most gut bacteria.

    “The detection and identification of translocated bacteria and characterisation of collapsing gut communities are no longer limited by insensitive culture-based techniques, which cannot detect most gut bacteria.”

    From The microbiome and critical illness (2016) · cites this paper as [108]

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  1. [12]Gibson, G. R., and M. B. Roberfroid (ed.). Colonic microbiota, nutrition and health, in press. Kluwer Academic Publishers, Dodrecht, The Netherlands.

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Authors
Suau, A., Bonnet, R., Sutren, M., Godon, J.-J., Gibson, G. R., Collins, M. D., & Doré, J.
Affiliations
  • Institut National de la Recherche Agronomique (FR)
  • <!--label omitted: 2-->Department of Food Science and Technology, University of Reading, Whiteknights, Reading, RG6 6AP United Kingdom2
  • <!--label omitted: 1-->Laboratoire d’Ecologie et Physiologie du Système Digestif, Institut National de la Recherche Agronomique, 78352 Jouy-en-Josas Cedex,1 and
  • Laboratoire de Biotechnologie de l'Environnement (FR)
  • University of Reading (GB)
Venue
Applied and Environmental Microbiology
Published
1999-11
Volume
65
Issue
11
Pages
4799-4807
ISSN
  • 0099-2240 (ISSN-L)
  • 1098-5336
OpenAlex
W2117130914
Cited by
1,490
References
37
Citations by year
2026: 10 · 2025: 13 · 2024: 24 · 2023: 20 · 2022: 23 · 2021: 37 · 2020: 45 · 2019: 40 · 2018: 49 · 2017: 40 · 2016: 61 · 2015: 56 · 2014: 75 · 2013: 65 · 2012: 57
FWCI
12.23
Type
journal article
Language
en
Open access
Locations
  • Applied and Environmental Microbiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • CentAUR (University of Reading) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
human gut microbiome, 16S rRNA gene, bacterial diversity, uncultured bacteria, molecular species, fecal bacteria, Bacteroides, Clostridium coccoides, Clostridium leptum, novel bacterial species, Bacteroides thetaiotaomicron, Eubacterium rectale, phylogenetic classification
MeSH terms
Bacteroides, Clostridium, Eubacterium, Feces, Fusobacterium, Genes, Bacterial, Humans, Phylogeny, RNA, Bacterial, RNA, Ribosomal, 16S

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