antifungal resistance
Mechanisms of ResistanceDetection of Candida auris Antifungal Drug Resistance Markers Directly from Clinical Skin SwabsAccurate and rapid assessment of Candida auris antifungal drug resistance is crucial for effective infection prevention and control actions, as well as for patient management. Here, performance of a molecular diagnostic platform, enabling rapid identification of FKS1 and ERG11 mutations conferring echinocandin and azole resistance, respectively, was...
Mechanisms of ResistanceTrichophyton rubrum Azole Resistance Mediated by a New ABC Transporter, TruMDR3The mechanisms of terbinafine resistance in a set of clinical isolates of Trichophyton rubrum have been studied recently. Of these isolates, TIMM20092 also showed reduced sensitivity to azoles. The azole resistance of TIMM20092 could be inhibited by milbemycin oxime, prompting us to examine the potential of...
SusceptibilityCiclopirox and Efinaconazole Transungual Permeation, Antifungal Activity, and Proficiency To Induce Resistance in Trichophyton rubrumOnychomycosis is a nail fungal infection, mostly caused by dermatophytes. The treatment efficacy is impaired by difficulties of reaching effective drug levels at the site of infection; frequent relapses occur after cessation of antifungal therapy. The aim of the study was to compare two commercial products containing ciclopirox or efinaconazole for antimycotic activity and antifungal drug resistance.
SusceptibilityEmerging Terbinafine Resistance in Trichophyton: Clinical Characteristics, Squalene Epoxidase Gene Mutations, and a Reliable EUCAST Method for DetectionIn recent years, cases involving terbinafine-resistant Trichophyton isolates have been reported increasingly, particularly in India. We present 14 cases of terbinafine treatment failure in Trichophyton-infected Danish patients due to acquired resistance. Patients infected with Trichophyton rubrum (n = 12) or...
Mechanisms of ResistanceImpact of the Major Candida glabrata Triazole Resistance Determinants on the Activity of the Novel Investigational Tetrazoles VT-1598 and VT-1161VT-1161 and VT-1598 are promising investigational tetrazole antifungals that have shown in vitro and in vivo activity against Candida and other fungi. Candida glabrata is a problematic opportunistic pathogen that is associated with high mortality in invasive infection, as well as both intrinsic and rapidly acquired antifungal resistance....
SusceptibilityMolecular Identification, Antifungal Susceptibility Testing, and Mechanisms of Azole Resistance in Aspergillus Species Received within a Surveillance Program on Antifungal Resistance in SpainAntifungal resistance is one of the major causes of the increasing mortality rates for fungal infections, especially for those caused by Aspergillus spp. A surveillance program was established in 2014 in the Spanish National Center for Microbiology for tracking resistance in the most prevalent Aspergillus species. A total of 273 samples were included in the...
Epidemiology and SurveillanceElevated Prevalence of Azole-Resistant Aspergillus fumigatus in Urban versus Rural Environments in the United KingdomAzole resistance in the opportunistic pathogen Aspergillus fumigatus is increasing, dominated primarily by the following two environmentally associated resistance alleles: TR34/L98H and TR46/Y121F/T289A. By sampling soils across the South of England, we assess the prevalence of azole-resistant...
SusceptibilityFluconazole Resistance in Isolates of Uncommon Pathogenic Yeast Species from the United KingdomThe triazole drug fluconazole remains one of the most commonly prescribed antifungal drugs, both for prophylaxis in high-risk patients and also as a second-line treatment option for invasive Candida infections. Established susceptibility profiles and clinical interpretive breakpoints are available for fluconazole with...
Experimental TherapeuticsIn Vitro Activities of the Novel Investigational Tetrazoles VT-1161 and VT-1598 Compared to the Triazole Antifungals against Azole-Resistant Strains and Clinical Isolates of Candida albicansThe fungal Cyp51-specific inhibitors VT-1161 and VT-1598 have emerged as promising new therapies to combat fungal infections, including Candida spp. To evaluate their in vitro activities compared to other azoles, MICs were determined by Clinical and Laboratory Standards Institute (CLSI) method for VT-1161, VT-1598, fluconazole, voriconazole, itraconazole, and posaconazole against 68 ...
Mechanisms of ResistanceAbrogation of Triazole Resistance upon Deletion of CDR1 in a Clinical Isolate of Candida aurisCandida auris has rapidly emerged as a health care-associated and multidrug-resistant pathogen of global concern. In this work, we examined the relative expression of the four C. auris genes with the highest degree of homology to Candida...