Evidence map›Paper›PMID 27686415›Full record

ArticleScientific reports2016

Comparison of standard, quantitative and digital PCR in the detection of enterotoxigenic Bacteroides fragilis.

Rachel V Purcell, John Pearson, Frank A Frizelle, Jacqueline I Keenan

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.9field-weighted citation impact, top 10% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
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  6. Review
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  8. Advancement inBiosensors · 2021
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  9. The Mechanism ofThe Malaysian journal of medical sciences : MJMS · 2020
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  10. Article
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  13. Toward the Development of a Circulating Free DNA-BasedJournal of clinical microbiology · 2019
    Review
  14. Article
  15. Article
  16. Gastrointestinal Pathobionts in Pediatric Crohn's Disease Patients.International journal of microbiology · 2018
    Article
  17. Article
  18. Droplet digital PCR for quantification ofWorld journal of gastroenterology · 2017
    Article
  19. 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

4 authors at 1 institution in 1 country.

Rachel V PurcellDepartment of Surgery, University of Otago, 2 Riccarton Avenue, PO Box 4345, Christchurch 8140, New Zealand.
John PearsonDepartment of Population Health,University of Otago, 2 Riccarton Avenue,PO Box 4345,Christchurch 8140, New Zealand.
Frank A FrizelleDepartment of Surgery, University of Otago, 2 Riccarton Avenue, PO Box 4345, Christchurch 8140, New Zealand.
Jacqueline I KeenanDepartment of Surgery, University of Otago, 2 Riccarton Avenue, PO Box 4345, Christchurch 8140, New Zealand.
University of Otago · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gut colonization with enterotoxigenic Bacteroides fragilis (ETBF) appears to be associated with the development of colorectal cancer. However, differences in carriage rates are seen with various testing methods and sampling sites. We compared standard PCR, SYBR green and TaqMan quantitative PCR (qPCR) and digital PCR (dPCR) in detecting the B. fragilis toxin (bft) gene from cultured ETBF, and from matched luminal and faecal stool samples from 19 colorectal cancer patients. Bland-Altman analysis found that all three quantitative methods performed comparably in detecting bft from purified bacterial DNA, with the same limits of detection (<1 copy/μl). However, SYBR qPCR under-performed compared to TaqMan qPCR and dPCR in detecting bft in clinical stool samples; 13/38 samples were reported positive by SYBR, compared to 35 and 36 samples by TaqMan and dPCR, respectively. TaqMan qPCR and dPCR gave bft copy numbers that were 48-fold and 75-fold higher for the same samples than SYBR qPCR, respectively (p < 0.001). For samples that were bft-positive in both fecal and luminal stools, there was no difference in relative abundance between the sites, by any method tested. From our findings, we recommend the use of TaqMan qPCR as the preferred method to detect ETBF from clinical stool samples.

Identifiers

PMID27686415
PMCPMC5043350
OpenAlexW2526392185

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.