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azole resistance

  • Potent Synergistic Interactions between Lopinavir and Azole Antifungal Drugs against Emerging Multidrug-Resistant <span class="named-content genus-species" id="named-content-1">Candida auris</span>
    Experimental Therapeutics
    Potent Synergistic Interactions between Lopinavir and Azole Antifungal Drugs against Emerging Multidrug-Resistant Candida auris

    The limited therapeutic options and the recent emergence of multidrug-resistant Candida species present a significant challenge to human medicine and underscore the need for novel therapeutic approaches. Drug repurposing appears as a promising tool to augment the activity of current azole antifungals, especially against multidrug-resistant Candida auris. In...

    Hassan E. Eldesouky, Ehab A. Salama, Nadia A. Lanman, Tony R. Hazbun, Mohamed N. Seleem
  • <em>ERG11</em> Polymorphism in Voriconazole-Resistant <span class="named-content genus-species" id="named-content-1">Candida tropicalis</span>: Weak Role of <em>ERG11</em> Expression, Ergosterol Content, and Membrane Permeability
    Mechanisms of Resistance
    ERG11 Polymorphism in Voriconazole-Resistant Candida tropicalis: Weak Role of ERG11 Expression, Ergosterol Content, and Membrane Permeability

    Mutations in ERG11 were detected by gene sequencing and amino acid alignment in 18 Candida tropicalis strains with different degrees of sensitivity to voriconazole (VRC). ERG11 expression, sterol content, and membrane permeability were also evaluated. We report three missense mutations in ERG11 that resulted in resistance to VRC. The...

    Patricia Navarro-Rodríguez, Loida López-Fernández, Adela Martin-Vicente, Josep Guarro, Javier Capilla
  • Olorofim Susceptibility Testing of 1,423 Danish Mold Isolates Obtained in 2018-2019 Confirms Uniform and Broad-Spectrum Activity
    Susceptibility
    Olorofim Susceptibility Testing of 1,423 Danish Mold Isolates Obtained in 2018-2019 Confirms Uniform and Broad-Spectrum Activity

    Olorofim is a novel antifungal drug in phase 2 trials. It has shown promising in vitro activity against various molds, except for Mucorales. Initially, we observed a broad range of EUCAST MICs for Aspergillus fumigatus. Here, we explored the MIC variability in more detail and prospectively investigated the susceptibility of contemporary clinical mold isolates...

    Karen Marie Thyssen Astvad, Karin Meinike Jørgensen, Rasmus Krøger Hare, Raluca Datcu, Maiken Cavling Arendrup
  • Multicentric Analysis of the Species Distribution and Antifungal Susceptibility of Cryptic Isolates from <em>Aspergillus</em> Section <em>Fumigati</em>
    Editor's Pick Susceptibility
    Multicentric Analysis of the Species Distribution and Antifungal Susceptibility of Cryptic Isolates from Aspergillus Section Fumigati

    The antifungal susceptibility of Aspergillus cryptic species is poorly known. We assessed 51 isolates, belonging to seven Fumigati cryptic species, by the EUCAST reference method and the concentration gradient strip (CGS) method. Species-specific patterns were observed, with high MICs for azole drugs, except for Aspergillus hiratsukae and...

    S. Imbert, A. C. Normand, S. Cassaing, F. Gabriel, L. Kristensen, C. Bonnal, L. Lachaud, D. Costa, J. Guitard, L. Hasseine, M. Palous, M. Piarroux, M. Hendrickx, R. Piarroux, A. Fekkar
  • <span class="named-content genus-species" id="named-content-1">Aspergillus fumigatus</span> Cyp51A and Cyp51B Proteins Are Compensatory in Function and Localize Differentially in Response to Antifungals and Cell Wall Inhibitors
    Mechanisms of Resistance
    Aspergillus fumigatus Cyp51A and Cyp51B Proteins Are Compensatory in Function and Localize Differentially in Response to Antifungals and Cell Wall Inhibitors

    Triazole antifungals are the primary therapeutic option against invasive aspergillosis. However, resistance to azoles has increased dramatically over the last decade. Azole resistance is known to primarily occur due to point mutations in the azole target protein Cyp51A, one of two paralogous 14-α sterol demethylases found in Aspergillus fumigatus. Despite the...

    Mark T. Roundtree, Praveen R. Juvvadi, E. Keats Shwab, D. Christopher Cole, William J. Steinbach
  • Genetic Basis of Azole and Echinocandin Resistance in Clinical <span class="named-content genus-species" id="named-content-1">Candida glabrata</span> in Japan
    Mechanisms of Resistance
    Genetic Basis of Azole and Echinocandin Resistance in Clinical Candida glabrata in Japan

    Infections caused by Candida glabrata have caused worldwide concern, especially when they are associated with increasing echinocandin and azole resistance. In this study, we analyzed the molecular mechanisms of azole and echinocandin resistance in C. glabrata isolates obtained from hospitalized...

    Hazim O. Khalifa, Teppei Arai, Hidetaka Majima, Akira Watanabe, Katsuhiko Kamei
  • A Simple Method To Detect Point Mutations in <span class="named-content genus-species" id="named-content-1">Aspergillus fumigatus</span> <em>cyp51A</em> Gene Using a Surveyor Nuclease Assay
    Analytical Procedures
    A Simple Method To Detect Point Mutations in Aspergillus fumigatus cyp51A Gene Using a Surveyor Nuclease Assay

    One of the main mechanisms of azole resistance of Aspergillus fumigatus is thought to be a reduction in the drug’s affinity for the target molecule, Cyp51A, due to its amino acid mutation(s). It is known that the azole resistance pattern is closely related to the mutation site(s) of the molecule. In this study, we tried to develop a simple and rapid detection method...

    Teppei Arai, Hidetaka Majima, Akira Watanabe, Katsuhiko Kamei
  • <span class="named-content genus-species" id="named-content-1">Aspergillus fumigatus</span> Clinical Isolates Carrying CYP51A with TR34/L98H/S297T/F495I Substitutions Detected after Four-Year Retrospective Azole Resistance Screening in Brazil
    Susceptibility
    Aspergillus fumigatus Clinical Isolates Carrying CYP51A with TR34/L98H/S297T/F495I Substitutions Detected after Four-Year Retrospective Azole Resistance Screening in Brazil

    Azole antifungal resistance in Aspergillus fumigatus is a worldwide concern. As in most public hospitals in Brazil, antifungal susceptibility tests are not routinely performed for filamentous fungi at our institution. A 4-year retrospective azole antifungal resistance screening revealed two azole-resistant...

    Laís Pontes, Caio Augusto Gualtieri Beraquet, Teppei Arai, Guilherme Leite Pigolli, Luzia Lyra, Akira Watanabe, Maria Luiza Moretti, Angélica Zaninelli Schreiber
  • Comparison of the MICs Obtained by Gradient Concentration Strip and EUCAST Methods for Four Azole Drugs and Amphotericin B against Azole-Susceptible and -Resistant <em>Aspergillus</em> Section <em>Fumigati</em> Clinical Isolates
    Susceptibility
    Comparison of the MICs Obtained by Gradient Concentration Strip and EUCAST Methods for Four Azole Drugs and Amphotericin B against Azole-Susceptible and -Resistant Aspergillus Section Fumigati Clinical Isolates

    Reference methods used to assess the drug susceptibilities of Aspergillus fumigatus isolates consisted of EUCAST and CLSI standardized broth microdilution techniques. Considering the increasing rate and the potential impact on the clinical outcome of azole resistance in A. fumigatus, more suitable...

    S. Dellière, L. Verdurme, J. Bigot, E. Dannaoui, Y. Senghor, F. Botterel, A. Fekkar, M. E. Bougnoux, C. Hennequin, J. Guitard
  • Comparison of Two Typing Methods for Characterization of Azole Resistance in <span class="named-content genus-species" id="named-content-1">Aspergillus fumigatus</span> from Potting Soil Samples in a Chinese Hospital
    Epidemiology and Surveillance
    Comparison of Two Typing Methods for Characterization of Azole Resistance in Aspergillus fumigatus from Potting Soil Samples in a Chinese Hospital

    To understand the characterizations of azole resistance in Aspergillus fumigatus from potting soil samples in the hospital, a total of 58 samples were collected. Among 106 A. fumigatus samples obtained, 5 isolates from 4 soil samples located in the gerontology department were identified as azole-...

    Hong Fan, Yong Chen, Liping Duan, Jingya Zhao, Chunping Qin, Haifeng Li, Jinke Sun, Li Han

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