Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 429

The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.

Recombination and mutation during long-term gastric colonization by Helicobacter pylori : Estimates of clock rates, recombination size, and minimal age

Open access
Falush, Daniel, Kraft, Christian, Taylor, Nancy S., Correa, Pelayo, Fox, James G., Achtman, Mark, Suerbaum, Sebastian·2001·Proceedings of the National Academy of Sciences

Abstract

The bacterium Helicobacter pylori colonizes the gastric mucosa of half of the human population, resulting in chronic gastritis, ulcers, and cancer. We sequenced ten gene fragments from pairs of strains isolated sequentially at a mean interval of 1.8 years from 26 individuals. Several isolates had acquired small mosaic segments from other H. pylori or point mutations. The maximal mutation rate, the import size, and the frequency of recombination were calculated by using a Bayesian model. The calculations indicate that the last common ancestor of H. pylori existed at least 2,500–11,000 years ago. Imported mosaics have a median size of 417 bp, much smaller than for other bacteria, and recombination occurs frequently (60 imports spanning 25,000 bp per genome per year). Thus, the panmictic population structure of H. pylori results from very frequent recombination during mixed colonization by unrelated strains.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.251396098

Cites

32 of 32 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 32 references

Cited by

See all 429

Metadata

Authors
Falush, D., Kraft, C., Taylor, N. S., Correa, P., Fox, J. G., Achtman, M., & Suerbaum, S.
Venue
Proceedings of the National Academy of Sciences
Published
2001-12-11
Volume
98
Issue
26
Pages
15056-15061
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2169812063
Cited by
429
References
32
FWCI
16.46
Type
journal article
Language
en
Open access
green

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Recombination and mutation during long-term gastric colonization by Helicobacter pylori : Estimates of clock rates, recombination size, and minimal age. https://app.cochat.ai/papers/10.1073/pnas.251396098
The paper
Falush, D., Kraft, C., Taylor, N. S., Correa, P., Fox, J. G., Achtman, M., & Suerbaum, S. (2001). Recombination and mutation during long-term gastric colonization by Helicobacter pylori : Estimates of clock rates, recombination size, and minimal age. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.251396098

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.