Evidence map›Paper›PMID 31491000›Full record

ArticlePloS one2019

The rising incidence of Acanthamoeba keratitis: A 7-year nationwide survey and clinical assessment of risk factors and functional outcomes.

Anna C Randag, Jeroen van Rooij, Arnoud T van Goor, Samuël Verkerk, Robert P L Wisse, Isabelle E Y Saelens, Remco Stoutenbeek, Bart T H van Dooren, Yanny Y Y Cheng, Cathrien A Eggink

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 1 pooled it
9.9field-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

58 citing papers in PubMed, 1 synthesis or guideline pooled it, 122 citations in OpenAlex.

  1. Orthokeratology lens-relatedThe Journal of international medical research · 2021
    Pooled it
  2. Article
  3. Article
  4. Prognostic factors for therapeutic keratoplasty in Acanthamoeba keratitis: a retrospective study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Article
  5. Article
  6. Acanthamoeba Keratitis: 34-Year Epidemiological Profile.Antibiotics (Basel, Switzerland) · 2026
    Article
  7. Microbiology spectrum · 2026
    Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Observational
  14. Complicated Diagnosis and Treatment of Rare PainlessJournal of clinical medicine · 2025
    Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Acanthamoeba keratitis: from pathophysiology to prevention, a contemporary clinical perspective.Medical hypothesis, discovery & innovation ophthalmology journal · 2025
    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

10 authors at 7 institutions in 1 country.

Anna C RandagRotterdam Eye Hospital, Rotterdam, the Netherlands.ORCID 0000-0002-6993-291X
Jeroen van RooijRotterdam Eye Hospital, Rotterdam, the Netherlands.ORCID 0000-0003-4130-6869
Arnoud T van GoorRotterdam Eye Hospital, Rotterdam, the Netherlands.
Samuël VerkerkRadboud University Medical Center, Nijmegen, the Netherlands.
Robert P L WisseUniversity Medical Center Utrecht, Utrecht, the Netherlands.ORCID 0000-0002-2844-9868
Isabelle E Y SaelensUniversity Eye Clinic, Maastricht University Medical Center, Maastricht, the Netherlands.
Remco StoutenbeekUniversity Medical Center Groningen, Groningen, the Netherlands.
Bart T H van DoorenAmphia Hospital, Breda, the Netherlands.
Yanny Y Y ChengLeiden University Medical Center, Leiden, the Netherlands.
Cathrien A EgginkRadboud University Medical Center, Nijmegen, the Netherlands.
Rotterdam Eye Hospital · NLRadboud University Nijmegen · NLErasmus MC · NLLeiden University Medical Center · NLMaastricht University · NLUniversity Medical Center Groningen · NLUniversity Medical Center Utrecht · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo evaluate the incidence of Acanthamoeba keratitis in the Netherlands between 2009 and 2015 and to analyse predicting factors for treatment outcome.

methodsPatient characteristics, diagnostic methods, diagnostic delay, therapy prior to and after diagnosis, and visual outcome were obtained from medical files of all patients diagnosed with Acanthamoeba keratitis in the Netherlands between 2009 and 2015. A logistic regression analysis on treatment failure, defined as a best corrected visual acuity of less than 20/40 Snellen decimals (i.e. >0.3 logMAR or an approximate loss of three lines of visual acuity) and/or the need for keratoplasty, was performed to determine predicting factors.

resultsTwo hundred and twenty-four eyes of 224 patients were included. Ninety-five percent of the patients were contact lens wearers, of whom 74% wore soft contact lenses. The number of cases increased from 16 in 2009 to 49 in 2015. This resulted in an estimated incidence of 1 in 21,000 for soft contact lens wearers in 2015. Eighty-seven eyes (39%) met the criteria for treatment failure. In a multivariable regression analysis, higher age at presentation, a higher severity stage and corticosteroid use before diagnosis were positively correlated with treatment failure. Early referral to a cornea specialist was associated with better clinical outcomes.

conclusionsAlthough Acanthamoeba keratitis is still a relatively uncommon disease, the incidence in soft contact lens wearers has increased to reach 1 in 21,000 in 2015. Treatment failure occurred in 39% of cases, with age, higher severity stage, corticosteroid use before diagnosis and indirect referral to a cornea specialist as important risks factors.

Indexed as

Health SurveysAcanthamoeba KeratitisAdolescentAdultAgedChildFemaleHumansIncidenceMaleMiddle AgedRisk FactorsTreatment FailureYoung Adult

Identifiers

PMID31491000
PMCPMC6731013
OpenAlexW2971991145

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.