In vivo selection of a unique tandem repeat mediated azole resistance mechanism (TR 120 ) in aspergillus fumigatus cyp51A, Denmark

Abstract

We report a fatal aspergillosis case in which STRAf typing and whole-genome sequencing substantiated in vivo emergence of an azole-resistant Aspergillus fumigatus with a 120-bp tandem repeat in the promoter region of cyp51A. This event, previously restricted to the environment, challenges current understanding of azole resistance development in A. fumigatus.