Evidence map›Paper›PMID 12106506›Full record

ArticleBMC microbiology2002

Determination of PCR efficiency in chelex-100 purified clinical samples and comparison of real-time quantitative PCR and conventional PCR for detection of Chlamydia pneumoniae.

Tina Mygind, Svend Birkelund, Niels H Birkebaek, Lars Østergaard, Jørgen Skov Jensen, Gunna Christiansen

Open access · goldAbstract readComparative StudyValidation Study
In one paragraph

Article in BMC microbiology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
1.8field-weighted citation impact, top 16% 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

20 citing papers in PubMed, 70 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. A new method for quantitative real-time polymerase chain reaction data analysis.Journal of computational biology : a journal of computational molecular cell biology · 2013
    Article
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  13. Review
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  15. Screening for sexually transmitted infection pathogens in semen samples.The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2005
    Article
  16. Diagnosis and assessment of trachoma.Clinical microbiology reviews · 2004
    Review
  17. Article
  18. Article
  19. Article
  20. Comparison of PCR-based methods for the simultaneous detection of Neisseria meningitidis, Haemophilus influenzae, and Streptococcus pneumoniae in clinical samples.The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases
    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

6 authors at 3 institutions in 1 country.

Tina MygindDepartment of Medical Microbiology and Immunology, University of Aarhus, Denmark. mygind@biobase.dk
Svend Birkelund
Niels H Birkebaek
Lars Østergaard
Jørgen Skov Jensen
Gunna Christiansen
Aarhus University · DKAarhus University Hospital · DKStatens Serum Institut · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundChlamydia pneumoniae infection has been detected by serological methods, but PCR is gaining more interest. A number of different PCR assays have been developed and some are used in combination with serology for diagnosis. Real-time PCR could be an attractive new PCR method; therefore it must be evaluated and compared to conventional PCR methods.

resultsWe compared the performance of a newly developed real-time PCR with a conventional PCR method for detection of C. pneumoniae. The PCR methods were tested on reference samples containing C. pneumoniae DNA and on 136 nasopharyngeal samples from patients with chronic cough. We found the same detection limit for the two methods and clinical performance was equal for the real-time PCR and for the conventional PCR method, although only three samples tested positive. To investigate whether the low prevalence of C. pneumoniae among patients with chronic cough was caused by suboptimal PCR efficiency in the samples, PCR efficiency was determined based on the real-time PCR. Seventeen of twenty randomly selected clinical samples had similar PCR efficiency to samples containing pure genomic C. pneumoniae DNA.

conclusionThese results indicate that the performance of real-time PCR is comparable to that of conventional PCR, but this needs to be confirmed further. Real-time PCR can be used to investigate the PCR efficiency which gives a rough estimate of how well the real-time PCR assay work in a specific sample type. Suboptimal PCR efficiency of PCR is not a likely explanation for the low positivity rate of C. pneumoniae in patients with chronic cough.

Indexed as

Cation Exchange ResinsChelating AgentsChlamydophila pneumoniaeDNA, BacterialHeLa CellsHumansPolymerase Chain ReactionReference StandardsResins, SyntheticCation Exchange ResinsChelating AgentsChelex 100DNA, BacterialResins, Synthetic

Identifiers

PMID12106506
PMCPMC117782
OpenAlexW2153534897

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.