Evidence map›Paper›PMID 9770535›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1998

Free recombination within Helicobacter pylori.

S Suerbaum, J M Smith, K Bapumia, G Morelli, N H Smith, E Kunstmann, I Dyrek, M Achtman

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 275 papers.

0numbers the graph read from it
0cells of the map it votes in
275citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

275 citing papers in PubMed.

  1. Microbiology and molecular biology reviews : MMBR · 2026
    Review
  2. Molecular Characterization and Genetic Diversity ofDiagnostics (Basel, Switzerland) · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Crystal structure of dihydroorotate dehydrogenase from Helicobacter pylori with bound flavin mononucleotide.Acta crystallographica. Section F, Structural biology communications · 2025
    Article
  9. Article
  10. Article
  11. Pathogens (Basel, Switzerland) · 2024
    Review
  12. Review
  13. High-Salt Diet ExacerbatesJournal of personalized medicine · 2023
    Review
  14. Article
  15. Helicobacter pylori infection.Nature reviews. Disease primers · 2023
    Review
  16. Mutations Related to Antibiotics Resistance inAntibiotics (Basel, Switzerland) · 2023
    Article
  17. High prevalence ofFrontiers in microbiology · 2023
    Article
  18. Pathogenomics of Helicobacter pylori.Current topics in microbiology and immunology · 2023
    Review
  19. Application of biomaterials in the eradication ofFrontiers in microbiology · 2023
    Review
  20. Article

215 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

S SuerbaumDepartment of Medical Microbiology, Ruhr-Universität Bochum, D-44780 Bochum, Germany. suerbaum@ruhr-uni-bochum.de
J M Smith
K Bapumia
G Morelli
N H Smith
E Kunstmann
I Dyrek
M Achtman

Funding

Wellcome Trust
6 · The paper itself

Abstract

Sequences of three gene fragments (flaA, flaB, and vacA) from Helicobacter pylori strains isolated from patients in Germany, Canada, and South Africa were analyzed for diversity and for linkage equilibrium by using the Homoplasy Test and compatibility matrices. Horizontal genetic exchange in H. pylori is so frequent that different loci and polymorphisms within each locus are all at linkage equilibrium. These results indicate that H. pylori is panmictic. Comparisons with sequences from Escherichia coli, Neisseria meningitidis, and Drosophila melanogaster showed that recombination in H. pylori was much more frequent than in other species. In contrast, when multiple family members infected with H. pylori were investigated, some strains were indistinguishable at all three loci. Thus, H. pylori is clonal over short time periods after natural transmission.

Indexed as

Recombination, GeneticAllelesBacterial ProteinsBase SequenceDNA PrimersFlagellinHelicobacter pyloriMolecular Sequence DataPhylogenySpecies SpecificityBacterial ProteinsDNA PrimersflaA protein, bacteriaflaB flagellinFlagellinVacA protein, Helicobacter pylori

Identifiers

PMID9770535
PMCPMC22880

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.