Evidence map›Paper›PMID 24117797›Full record

ArticleAlimentary pharmacology & therapeutics2013

Significantly higher frequency of Helicobacter suis in patients with idiopathic parkinsonism than in control patients.

C Blaecher, A Smet, B Flahou, F Pasmans, R Ducatelle, D Taylor, C Weller, I Bjarnason, A Charlett, A J Lawson and 3 more

Abstract read
In one paragraph

Article in Alimentary pharmacology & therapeutics, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 3 pooled it
–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

32 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Association ofFrontiers in medicine · 2025
    Pooled it
  2. Non-International journal of molecular sciences · 2024
    Pooled it
  3. Pooled it
  4. Article
  5. Review
  6. Review
  7. Presence ofJournal of personalized medicine · 2022
    Article
  8. Review
  9. Evaluation of Inflammatory Cytokine and AntiMiddle East journal of digestive diseases · 2022
    Article
  10. Review
  11. Review
  12. GastricInternational journal of molecular sciences · 2021
    Article
  13. Isolation and characterization ofProceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  14. Genetic and Environmental Factors in Parkinson's Disease Converge on Immune Function and Inflammation.Movement disorders : official journal of the Movement Disorder Society · 2021
    Review
  15. Adhesion ofFrontiers in molecular biosciences · 2021
    Review
  16. Review
  17. Parkinson's disease: Are gut microbes involved?American journal of physiology. Gastrointestinal and liver physiology · 2020
    Review
  18. Role ofJournal of clinical medicine · 2020
    Review
  19. Frontiers in immunology · 2020
    Review
  20. 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

13 authors.

C BlaecherFaculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium; Institute of Pharmaceutical Science, King's College London, London, UK.
A Smet
B Flahou
F Pasmans
R Ducatelle
D Taylor
C Weller
I Bjarnason
A Charlett
A J Lawson
R J Dobbs
S M Dobbs
F Haesebrouck

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThere is increased proportional mortality from Parkinson's disease amongst livestock farmers. The hypokinesia of Parkinson's disease has been linked to Helicobacter pylori. H. suis is the most common zoonotic helicobacter in man.

aimTo compare the frequency of H. suis, relative to H. pylori, in gastric biopsies of patients with idiopathic parkinsonism (IP) and controls from gastroenterology services.

methodsDNA extracts, archived at a Helicobacter Reference Laboratory, from IP patient and gastroenterology service biopsies were examined anonymously for H. suis, using species-specific RT-PCR.

resultsRelative risk of having H. suis in 60 IP patients compared with 256 controls was 10 times greater than that of having H. pylori. In patients with IP and controls, respectively, frequencies of H. suis were 27 (exact binomial 95% C.I. 15, 38) and 2 (0, 3)%, and of H. pylori, 28 (17, 40) and 16 (12, 21)%. Excess of H. suis in IP held when only the antral or corporal biopsy was considered. Of 16 IP patients with H. suis, 11 were from 19 with proven H. pylori eradication, 3 from 17 pre-H. pylori eradication, 2 from 24 H. pylori culture/PCR-negative. Frequency was different between groups (P = 0.001), greatest where H. pylori had been eradicated. Even without known exposure to anti-H. pylori therapy, H. suis was more frequent in IP patients (5/41) than in controls (1/155) (P = 0.002). Partial multilocus sequence typing confirmed that strains from IP patients (6) and control (1) differed from RT-PCR standard strain.

conclusionsGreater frequency of H. suis in idiopathic parkinsonism appears exaggerated following H. pylori eradication. Multilocus sequence testing comparison with porcine strains may clarify whether transmission is from pigs/porcine products or of human-adapted, H. suis-like, bacteria.

Indexed as

AdultAgedAged, 80 and overCase-Control StudiesDNA, BacterialFemaleHelicobacter heilmanniiHelicobacter InfectionsHelicobacter pyloriHumansMaleMiddle AgedParkinsonian DisordersReverse Transcriptase Polymerase Chain ReactionRiskYoung AdultDNA, Bacterial

Identifiers

PMID24117797
PMCPMC4065369

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.