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  • Title: Activities of Manogepix and Comparators against 1,435 Recent Fungal Isolates Collected during an International Surveillance Program (2020).
    Author: Pfaller MA, Huband MD, Rhomberg PR, Bien PA, Castanheira M.
    Journal: Antimicrob Agents Chemother; 2022 Nov 15; 66(11):e0102822. PubMed ID: 36286491.
    Abstract:
    We evaluated the in vitro activity of manogepix and comparator agents against 1,435 contemporary fungal isolates collected worldwide from 73 medical centers in North America, Europe, the Asia-Pacific region, and Latin America during 2020. Of the isolates tested, 74.7% were Candida spp.; 3.7% were non-Candida yeasts, including 27 Cryptococcus neoformans var. grubii (1.9%); 17.1% were Aspergillus spp.; and 4.5% were other molds. All fungal isolates were tested by reference broth microdilution according to CLSI methods. Based on MIC90 values, manogepix (MIC50/MIC90, 0.008/0.06 mg/liter) was 16- to 64-fold more active than anidulafungin, micafungin, and fluconazole against Candida spp. isolates and the most active agent tested. Similarly, manogepix (MIC50/MIC90, 0.5/1 mg/liter) was ≥8-fold more active than anidulafungin, micafungin, and fluconazole against C. neoformans var. grubii. Based on minimum effective concentration for 90% of the isolates tested (MEC90) and MIC90 values, manogepix (MEC90, 0.03 mg/liter) was 16- to 64-fold more potent than itraconazole, posaconazole, and voriconazole (MIC90s, 0.5 to 2 mg/liter) against 246 Aspergillus spp. isolates. Aspergillus fumigatus isolates exhibited a wild-type (WT) phenotype for the mold-active triazoles, including itraconazole (87.0% WT) and voriconazole (96.4% WT). Manogepix was highly active against uncommon species of Candida, non-Candida yeasts, and rare molds, including 11 isolates of Candida auris (MIC50/MIC90, 0.004/0.015 mg/liter) and 12 isolates of Scedosporium spp. (MEC50/MEC90, 0.06/0.12 mg/liter). Additional studies are in progress to evaluate the clinical utility of the manogepix prodrug fosmanogepix in difficult-to-treat resistant fungal infections.
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