Evidence map›Paper›PMID 19624922›Full record

ArticleEmerging infectious diseases2009

Frequency and evolution of Azole resistance in Aspergillus fumigatus associated with treatment failure.

Susan J Howard, Dasa Cerar, Michael J Anderson, Ahmed Albarrag, Matthew C Fisher, Alessandro C Pasqualotto, Michel Laverdiere, Maiken C Arendrup, David S Perlin, David W Denning

Open access · diamondAbstract read
In one paragraph

Article in Emerging infectious diseases, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 372 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
372citing papers in PubMed, 2 pooled it
24.8field-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

372 citing papers in PubMed, 2 syntheses or guidelines pooled it, 742 citations in OpenAlex.

  1. Antifungal Stewardship in Invasive Fungal Infections, a Systematic Review.Advances in experimental medicine and biology · 2025
    Pooled it
  2. Guideline
  3. Article
  4. Article
  5. Article
  6. Article
  7. Molecular and Phenotypic Characterization of Multidrug-ResistantJournal of fungi (Basel, Switzerland) · 2026
    Article
  8. Review
  9. Genotype-Phenotype Relationships in Azole-ResistantJournal of fungi (Basel, Switzerland) · 2026
    Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Global epidemiology of azole resistance inJAC-antimicrobial resistance · 2026
    Review
  15. A One Health Perspective onJournal of fungi (Basel, Switzerland) · 2026
    Article
  16. Article
  17. Article
  18. Article
  19. Azole-ResistantJournal of fungi (Basel, Switzerland) · 2025
    Review
  20. Whole-chromosome duplications drive antimicrobial resistance inbioRxiv : the preprint server for biology · 2025
    Article

312 more citing papers are in PubMed but not listed here.

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 5 institutions in 5 countries.

Susan J HowardRegional Mycology Laboratory, Manchester, UK.
Dasa Cerar
Michael J Anderson
Ahmed Albarrag
Matthew C Fisher
Alessandro C Pasqualotto
Michel Laverdiere
Maiken C Arendrup
David S Perlin
David W Denning
Ljubljana University Medical Centre · SIHôpital Maisonneuve-Rosemont · CAUniversidade Federal do Rio Grande do Sul · BRStatens Serum Institut · DKUniversity of Manchester · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Azoles are the mainstay of oral therapy for aspergillosis. Azole resistance in Aspergillus has been reported infrequently. The first resistant isolate was detected in 1999 in Manchester, UK. In a clinical collection of 519 A. fumigatus isolates, the frequency of itraconazole resistance was 5%, a significant increase since 2004 (p<0.001). Of the 34 itraconazole-resistant isolates we studied, 65% (22) were cross-resistant to voriconazole and 74% (25) were cross-resistant to posaconazole. Thirteen of 14 evaluable patients in our study had prior azole exposure; 8 infections failed therapy (progressed), and 5 failed to improve (remained stable). Eighteen amino acid alterations were found in the target enzyme, Cyp51A, 4 of which were novel. A population genetic analysis of microsatellites showed the existence of resistant mutants that evolved from originally susceptible strains, different cyp51A mutations in the same strain, and microalterations in microsatellite repeat number. Azole resistance in A. fumigatus is an emerging problem and may develop during azole therapy.

Indexed as

Amino Acid SubstitutionAntifungal AgentsAspergillosisAspergillus fumigatusAzolesCytochrome P-450 Enzyme SystemDisease ProgressionDrug Resistance, FungalEvolution, MolecularFungal ProteinsHumansItraconazolePyrimidinesTreatment FailureTriazolesVoriconazoleAntifungal AgentsAzolescytochrome P-450 CYP51A, AspergillusCytochrome P-450 Enzyme SystemFungal ProteinsItraconazolePyrimidinesTriazolesVoriconazole

Identifiers

PMID19624922
PMCPMC2744247
OpenAlexW2169748580

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.