Evidence map›Paper›PMID 30392431›Full record

ArticleThe Journal of international medical research2019

No evidence of Chlamydia pneumoniae in the synovia of patients with osteoarthritis.

Marie Edvinsson, Nicole Welvaart, Lars Ryttberg, Per Wretenberg, Tomas Vikerfors, Christina Nyström-Rosander

Open access · goldAbstract read
In one paragraph

Article in The Journal of international medical research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.3field-weighted citation impact, top 35% 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

2 citing papers in PubMed, 2 citations in OpenAlex.

  1. Article
  2. Review
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

6 authors at 2 institutions in 1 country.

Marie Edvinsson1 Department of Medical Sciences, Infectious Diseases, Uppsala University, Uppsala, Sweden.ORCID https://orcid.org/0000-0003-2845-9190
Nicole Welvaart2 Department of Orthopaedics, School of Medical Sciences, Örebro University, Örebro, Sweden.
Lars Ryttberg2 Department of Orthopaedics, School of Medical Sciences, Örebro University, Örebro, Sweden.
Per Wretenberg2 Department of Orthopaedics, School of Medical Sciences, Örebro University, Örebro, Sweden.
Tomas Vikerfors3 Department of Infectious Diseases, Örebro University, Örebro, Sweden.
Christina Nyström-Rosander1 Department of Medical Sciences, Infectious Diseases, Uppsala University, Uppsala, Sweden.
Örebro University · SEUppsala University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveOsteoarthritis (OA) is a common cause of disability affecting millions of people of all ages worldwide. The pathogenesis involves an inflammatory component, but the cause of the inflammation remains incompletely understood. The intracellular bacteria Chlamydia trachomatis and C. pneumoniae have been demonstrated in patients with reactive arthritis. Both of these microorganisms can cause chronic and persistent infections, with C. trachomatis being the most common cause of reactive arthritis. This study was performed to investigate the presence of C. pneumoniae in a large number of patients with primary OA.

methodsThe study included 75 patients who underwent total knee arthroplasty. During surgery, a synovial biopsy was performed and synovial fluid drawn. Real-time polymerase chain reaction (PCR) of C. pneumoniae was run on all patients, and real-time PCR of bacterial 16S rDNA was conducted on 30 of the 75 patients to screen for the presence of other bacteria.

resultsReal-time PCR showed no evidence of the presence of C. pneumoniae in the patients' specimens, nor were other bacteria detected.

conclusionsAlthough an inflammatory component is part of the pathogenesis of OA, we found no evidence indicating that C. pneumoniae is a stimulator of that inflammation.

Indexed as

AgedArthroplastyChlamydophila InfectionsChlamydophila pneumoniaeDNA, BacterialFemaleFollow-Up StudiesHumansMaleMiddle AgedOsteoarthritisPolymerase Chain ReactionPrognosisRNA, Ribosomal, 16SSynovial FluidSynovial MembraneDNA, BacterialRNA, Ribosomal, 16Sinflammationknee arthroplastyOsteoarthritispolymerase chain reactionsynovial membrane

Identifiers

PMID30392431
PMCPMC6381461
OpenAlexW2900185892

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.