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Cited by 1,158

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Molecular analysis of the bacterial microbiota in the human stomach

Open access
Bik, Elisabeth M., Eckburg, Paul B., Gill, Steven R., Nelson, Karen E., Purdom, Elizabeth A., Francois, Fritz, Perez-Perez, Guillermo, Blaser, Martin J., Relman, David A.·2006·Proceedings of the National Academy of Sciences

Abstract

The microbiota of the human stomach and the influence of Helicobacter pylori colonization on its composition remain largely unknown. We characterized bacterial diversity within the human gastric mucosa by using a small subunit 16S rDNA clone library approach and analyzed 1,833 sequences generated by broad-range bacterial PCR from 23 gastric endoscopic biopsy samples. A diverse community of 128 phylotypes was identified, featuring diversity at this site greater than previously described. The majority of sequences were assigned to the Proteobacteria , Firmicutes , Actinobacteria , Bacteroidetes , and Fusobacteria phyla. Ten percent of the phylotypes were previously uncharacterized, including a Deinococcus -related organism, relatives of which have been found in extreme environments but not reported before in humans. The gastric clone libraries from 19 subjects contained H. pylori rDNA; however, only 12 of these subjects tested positive for H. pylori by conventional laboratory methods. Statistical analysis revealed a large degree of intersubject variability of the gastric ecosystem. The presence of H. pylori did not affect the composition of the gastric community. This gastric bacterial rDNA data set was significantly different from sequence collections of the human mouth and esophagus described in other studies, indicating that the human stomach may be home to a distinct microbial eco-system. The gastric microbiota may play important, as-yet-undiscovered roles in human health and disease.

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Metadata

Authors
Bik, E. M., Eckburg, P. B., Gill, S. R., Nelson, K. E., Purdom, E. A., Francois, F., Perez-Perez, G., Blaser, M. J., & Relman, D. A.
Venue
Proceedings of the National Academy of Sciences
Published
2006-01-04
Volume
103
Issue
3
Pages
732-737
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2120472610
Cited by
1,158
References
1
FWCI
39.58
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Molecular analysis of the bacterial microbiota in the human stomach. https://app.cochat.ai/papers/10.1073/pnas.0506655103
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Bik, E. M., Eckburg, P. B., Gill, S. R., Nelson, K. E., Purdom, E. A., Francois, F., Perez-Perez, G., Blaser, M. J., & Relman, D. A. (2006). Molecular analysis of the bacterial microbiota in the human stomach. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0506655103

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