Evidence map›Paper›PMID 28655347›Full record

ArticleBMC research notes2017

Helicobacter pylori cagA and vacA genes in dyspeptic Ghanaian patients.

Timothy N Archampong, Richard H Asmah, Ebenezer K Aidoo, Edwin K Wiredu, Richard K Gyasi, David N Adjei, Sandra Beleza, Christopher D Bayliss, Karen Krogfelt

Open access · goldAbstract read
In one paragraph

Article in BMC research notes, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% of its field
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

10 citing papers in PubMed, 1 synthesis or guideline pooled it, 29 citations in OpenAlex.

  1. Pooled it
  2. Prevalence and Predisposing Factors ofPublic health challenges · 2026
    Article
  3. Prevalence of cagA, cagM, vacA and oipA genes in isolates of Helicobacter pylori obtained from hospital patients in Northeast Brazil.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2024
    Article
  4. Characterization ofThe Pan African medical journal · 2024
    Article
  5. Article
  6. Article
  7. Serum antibodies to selectedMalawi medical journal : the journal of Medical Association of Malawi · 2022
    Article
  8. Article
  9. BioMed research international · 2019
    Review
  10. Application of PCR and Microscopy to DetectThe Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2019
    Article
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

9 authors at 5 institutions in 3 countries.

Timothy N ArchampongDepartment of Medicine and Therapeutics, School of Medicine and Dentistry, College of Health Sciences, University of Ghana, P O Box 4236, Korle-Bu, Accra, Ghana. tnaa@doctors.net.uk.
Richard H AsmahDepartment of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana.
Ebenezer K AidooDepartment of Medical Microbiology, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana.
Edwin K WireduDepartment of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana.
Richard K GyasiDepartment of Pathology, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana.
David N AdjeiDepartment of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana.
Sandra BelezaDepartment of Genetics, University of Leicester, University Road, Leicester, UK.
Christopher D BaylissDepartment of Genetics, University of Leicester, University Road, Leicester, UK.
Karen KrogfeltMicrobiology and Infection Control, Statens Serum Institut, 5 Artillerivej, Copenhagen, Denmark.
University of Ghana · GHUniversity of Health and Allied Sciences · GHUniversity of Leicester · GBKorle Bu Teaching Hospital · GHStatens Serum Institut · DK

Funding

Medical Research Council MR/M01987X/1
6 · The paper itself

Abstract

backgroundHelicobacter pylori infection is prevalent in Ghana. The development of gastro-duodenal disease is dependent on virulence of the infecting strain, host susceptibility and environmental factors. Helicobacter pylori cagA and vacA strains induce more inflammation, ulceration and oncogenesis. Here, for the first time we present data on H. pylori cagA and vacA genes and their association with gastro-duodenal disease in Ghana. A total of 159 patients with dyspepsia at Korle-Bu Teaching Hospital, Accra, were investigated for H. pylori with urease-CLO, of which 113 (71.1%) were positive. Genomic DNA was extracted from antral biopsies using QIAGEN DNeasy kit. Detection of H. pylori vacA and cagA genes were determined by PCR as previously described.

resultsIn total, 110 (69.2%) vacAs1, 71 (44.7%) vacAm1, 35 (22.0%) vacAm2, 77 (48.4%) cagA-(hydrophilic region) and 109 (68.6%) cagA-(internal duplication region) were detected. In multivariate analysis, duodenal ulcer was more likely than other diagnoses to have detectable cagA-(hydrophilic region) (OR 3.1 CI 1.2-7.9) or vacAs1m1 (OR 6.5 CI 1.2-34.0).

conclusionsMajority of biopsies were colonized with H. pylori harboring both cagA and vacA. H. pylori cagA-(internal duplication region) was more prevalent than cagA-(hydrophilic region). Duodenal ulcer was more likely than other diagnoses to have detectable cagA-(hydrophilic region) or vacAs1m1.

Indexed as

Antigens, BacterialBacterial ProteinsBiopsyCross-Sectional StudiesDNA, BacterialDuodenal UlcerDyspepsiaFemaleGene ExpressionGenotypeGhanaHelicobacter InfectionsHelicobacter pyloriHumansMaleMiddle AgedAntigens, BacterialBacterial ProteinscagA protein, Helicobacter pyloriDNA, BacterialVacA protein, Helicobacter pyloricagAEndoscopyGhanaHelicobacter pylorivacA

Identifiers

PMID28655347
PMCPMC5488471
OpenAlexW2732686446

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.