Evidence map›Paper›PMID 34741122›Full record

ArticleEye (London, England)2022

Comparison of culture, confocal microscopy and PCR in routine hospital use for microbial keratitis diagnosis.

Jeremy J Hoffman, John K G Dart, Surjo K De, Nicole Carnt, Georgia Cleary, Scott Hau

Open access · hybridAbstract read
In one paragraph

Article in Eye (London, England), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
8.4field-weighted citation impact, top 1% 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

29 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Acanthamoeba keratitis: from pathophysiology to prevention, a contemporary clinical perspective.Medical hypothesis, discovery & innovation ophthalmology journal · 2025
    Review
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Fungal keratitis caused byFrontiers in medicine · 2024
    Article
  15. Article
  16. Article
  17. New Frontiers inBiology · 2023
    Review
  18. Article
  19. Article
  20. Diagnosis ofDiagnostics (Basel, Switzerland) · 2023
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Jeremy J HoffmanMoorfields Eye Hospital NHS Foundation Trust, London, UK. j.hoffman@ucl.ac.uk.ORCID 0000-0001-9454-2131
John K G DartMoorfields Eye Hospital NHS Foundation Trust, London, UK.
Surjo K DeMoorfields Eye Hospital NHS Foundation Trust, London, UK.
Nicole CarntMoorfields Eye Hospital NHS Foundation Trust, London, UK.ORCID 0000-0002-5376-0885
Georgia ClearyMoorfields Eye Hospital NHS Foundation Trust, London, UK.
Scott HauMoorfields Eye Hospital NHS Foundation Trust, London, UK.
Moorfields Eye Hospital NHS Foundation Trust · GB

Funding

Wellcome Trust 207472/Z/17/Z
6 · The paper itself

Abstract

aimsTo evaluate the sensitivity and specificity of polymerase chain reaction (PCR), in vivo confocal microscopy (IVCM) and culture for microbial keratitis (MK) diagnosis.

methodsRetrospective review of PCR, IVCM and culture results for MK diagnosis at Moorfields Eye Hospital between August 2013 and December 2014.

resultsPCR results were available for 259 MK patients with concurrent culture for 203/259 and IVCM for 149/259. Sensitivities and specificities with 95% confidence intervals [95% CI] were calculated for Acanthamoeba keratitis (AK) and fungal keratitis (FK), by comparison with culture, for both IVCM and PCR. For AK, FK and bacterial keratitis (BK) sensitivities were calculated, for each diagnostic method, by comparison with a composite reference standard (a positive result for one or more of culture, PCR or IVCM having a specificity of 100% by definition). For the latter, sensitivities with [95% CI] were: for AK, IVCM 77.1% [62.7-88.0%], PCR 63.3% [48.3-76.6%], culture 35.6 [21.9-51.2]; for FK, IVCM 81.8% [48.2-97.7%], PCR 30.8% [9.09-61.4%], culture 41.7% [15.2-72.3%]; for BK, PCR 25.0% [14.7-37.9%], culture 95.6% [87.6-99.1%].

conclusionIVCM was the most sensitive technique for AK and FK diagnosis but culture remains our gold standard for BK. These findings reflect results to be expected from service providers to UK ophthalmology units and demonstrates the need at our centre for ongoing diagnostic result audit leading to the potential to improve PCR diagnosis. Both FK and AK are now common in the UK; ophthalmology units need to have all these techniques available to optimise their MK management.

Indexed as

Acanthamoeba KeratitisCorneal UlcerEye Infections, BacterialEye Infections, FungalCorneaHospitalsHumansMicroscopy, ConfocalPolymerase Chain Reaction

Identifiers

PMID34741122
PMCPMC9581916
OpenAlexW3209994877

What OpenQuestion holds

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LicenceCC BY
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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.