RT Journal Article T1 In Vitro Antifungal Activity of Ibrexafungerp (SCY-078) Against Contemporary Blood Isolates From Medically Relevant Species of Candida: A European Study. A1 Quindos, Guillermo A1 Miranda-Cadena, Katherine A1 San-Millan, Rosario A1 Borroto-Esoda, Katyna A1 Canton, Emilia A1 Linares-Sicilia, Maria Jose A1 Hamprecht, Axel A1 Montesinos, Isabel A1 Tortorano, Anna Maria A1 Prigitano, Anna A1 Vidal-Garcia, Matxalen A1 Marcos-Arias, Cristina A1 Guridi, Andrea A1 Sanchez-Reus, Ferran A1 Machuca-Barcena, Jesus A1 Rodriguez-Iglesias, Manuel Antonio A1 Martin-Mazuelos, Estrella A1 Castro-Mendez, Carmen A1 Lopez-Soria, Leyre A1 Ruiz-Gaitan, Alba A1 Fernandez-Rivero, Marcelo A1 Lorenzo, Damaris A1 Capilla, Javier A1 Rezusta, Antonio A1 Peman, Javier A1 Guarro, Josep A1 Pereira, Joana A1 Pais, Celia A1 Romeo, Orazio A1 Ezpeleta, Guillermo A1 Jauregizar, Nerea A1 Angulo, David A1 Eraso, Elena K1 Candida K1 EUCAST K1 SCY-078 K1 Antifungal resistance K1 Antifungal testing K1 Caspofungin K1 Ibrexafungerp K1 Micafungin AB Ibrexafungerp (SCY-078) is the newest oral and intravenous antifungal drug with broad activity, currently undergoing clinical trials for invasive candidiasis. The aim of this study was to assess the in vitro activity of ibrexafungerp and comparators against a collection of 434 European blood isolates of Candida. Ibrexafungerp, caspofungin, fluconazole, and micafungin minimum inhibitory concentrations (MICs) were collected from 12 European laboratories for 434 blood isolates, including 163 Candida albicans, 108 Candida parapsilosis, 60 Candida glabrata, 40 Candida tropicalis, 29 Candida krusei, 20 Candida orthopsilosis, 6 Candida guilliermondii, 2 Candida famata, 2 Candida lusitaniae, and 1 isolate each of Candida bracarensis, Candida catenulata, Candida dubliniensis, and Candida kefyr. MICs were determined by the EUCAST broth microdilution method, and isolates were classified according to recommended clinical breakpoints and epidemiological cutoffs. Additionally, 22 Candida auris from different clinical specimens were evaluated. Ibrexafungerp MICs ranged from 0.016 to ≥8 mg/L. The lowest ibrexafungerp MICs were observed for C. albicans (geometric MIC 0.062 mg/L, MIC range 0.016-0.5 mg/L) and the highest ibrexafungerp MICs were observed for C. tropicalis (geometric MIC 0.517 mg/L, MIC range 0.06-≥8 mg/L). Modal MICs/MIC50s (mg/L) against Candida spp. were 0.125/0.06 for C. albicans, 0.5/0.5 for C. parapsilosis, 0.25/0.25 for C. glabrata, 0.5/0.5 for C. tropicalis, 1/1 for C. krusei, 4/2 for C. orthopsilosis, and 0.5/0.5 for C. auris. Ibrexafungerp showed activity against fluconazole- and echinocandin-resistant isolates. If adopting wild-type upper limits, a non-wild-type phenotype for ibrexafungerp was only observed for 16/434 (3.7%) isolates: 11 (4.6%) C. parapsilosis, 4 (5%) C. glabrata, and 1 (2.5%) C. tropicalis. Ibrexafungerp showed a potent in vitro activity against Candida. PB Frontiers Research Foundation YR 2022 FD 2022-04-19 LK http://hdl.handle.net/10668/20540 UL http://hdl.handle.net/10668/20540 LA en NO Quindós G, Miranda-Cadena K, San-Millán R, Borroto-Esoda K, Cantón E, Linares-Sicilia MJ, et al. In Vitro Antifungal Activity of Ibrexafungerp (SCY-078) Against Contemporary Blood Isolates From Medically Relevant Species of Candida: A European Study. Front Cell Infect Microbiol. 2022 May 16;12:906563 DS RISalud RD Apr 12, 2025