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First investigative study of azole-resistant aspergillus fumigatus in the environment in burkina faso

par Yerbanga, Isidore IW;Resendiz-Sharpe, Agustin;Bamba, Sanata;Lagrou, Katrien;Diallo, Seydou Nakanabo;Rodriguez-Villalobos, Hector;Denis, Olivier ;Montesinos Hernandez, Isabel
Référence International Journal of Environmental Research and Public Health, 18, 5, page (1-6), 2250
Publication Publié, 2021-03

Article révisé par les pairs

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Résumé :

Azole-resistant Aspergillus fumigatus (ARAF) strains have been reported on all continents, however, limited data exist on these strains in Africa, while several factors, mainly environmental ones, suggest their presence on this continent. This study aimed to assess the environmental prevalence of ARAF strains in Burkina Faso, a country situated in the West African region where data on ARAF is non-existent. In total, 120 environmental samples (soil) were collected and analyzed. Samples were screened for resistance using three azole-containing agar plates; one without azole antifungal (growth control) and two supplemented with either itraconazole (4 mg/L) or voricona-zole (2 mg/L). The EUCAST susceptibility testing method was used to confirm the azole-resistant phenotype of A. fumigatus sensu-stricto isolates. Mutations in the cyp51A gene were determined by sequencing. Of the 120 samples, 51 positive samples showed growth of A. fumigatus isolates on control medium. One ARAF (2%; 1/51) isolate was found amongst A. fumigatus positive samples and harbored the F46Y/M172V/E427K cyp51A mutations. No TR34/L98H or TR46/Y121F/T289A mutations were observed. Our study described the first A. fumigatus isolate resistant to an azole antifun-gal in Burkina Faso.