دورية أكاديمية
High prevalence of triazole resistance in Aspergillus fumigatus, especially mediated by TR/L98H, in a French cohort of patients with cystic fibrosis
| العنوان: | High prevalence of triazole resistance in Aspergillus fumigatus, especially mediated by TR/L98H, in a French cohort of patients with cystic fibrosis |
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| المؤلفون: | Morio, Florent, Aubin, Guillaume G., Danner-Boucher, Isabelle, Haloun, Alain, Sacchetto, Emilie, Garcia-Hermoso, Dea, Bretagne, Stéphane, Miegeville, Michel, Le Pape, Patrice |
| بيانات النشر: | Oxford University Press |
| سنة النشر: | 2012 |
| المجموعة: | HighWire Press (Stanford University) |
| مصطلحات موضوعية: | Original research |
| الوصف: | Objectives Triazole resistance in Aspergillus fumigatus due to a single azole resistance mechanism (TR/L98H) is increasingly reported in European countries. Data from patients with cystic fibrosis (CF) are limited. Our study aimed to investigate the prevalence and molecular mechanisms of azole resistance in A. fumigatus in a cohort of patients with CF. Methods Eighty-five A. fumigatus isolates from 50 CF patients, collected between January 2010 and April 2011, were retrospectively analysed for azole resistance using agar plates containing 4 mg/L itraconazole. MICs of itraconazole, voriconazole and posaconazole were determined according to EUCAST methodology for each isolate able to grow on this medium. Species identification was performed by sequencing of the β-tubulin gene. Sequencing analysis of the cyp51A gene and its promoter region was conducted. Results Nine isolates (four patients, 8% prevalence) were able to grow on itraconazole-containing agar plates. Itraconazole resistance was confirmed by EUCAST methodology (MICs >2 mg/L). All isolates had mutations in the cyp51A gene at residues previously involved in azole resistance: L98H ( n = 5), M220T ( n = 4) and G54R ( n = 1). One patient had three genetically distinct azole-resistant isolates identified during the study. The isolates with L98H that were recovered from three patients (6% prevalence) also had the 34 bp tandem repeat in the promoter region of cyp51A (TR/L98H) and displayed multiazole resistance. Conclusions We report an 8% prevalence of itraconazole resistance in CF patients in our centre, mostly driven by TR/L98H (6%). Our data confirm that TR/L98H occurs in France and can be highly prevalent in CF patients. |
| نوع الوثيقة: | text |
| وصف الملف: | text/html |
| اللغة: | English |
| العلاقة: | http://jac.oxfordjournals.org/cgi/content/short/dks160v2Test; http://dx.doi.org/10.1093/jac/dks160Test |
| DOI: | 10.1093/jac/dks160 |
| الإتاحة: | https://doi.org/10.1093/jac/dks160Test http://jac.oxfordjournals.org/cgi/content/short/dks160v2Test |
| حقوق: | Copyright (C) 2012, The British Society for Antimicrobial Chemotherapy |
| رقم الانضمام: | edsbas.EBB812D9 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/jac/dks160 |
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