JOURNAL ARTICLE

In vitro activity of olorofim (F901318) against fungi of the genus, Scedosporium and Rasamsonia as well as against Lomentospora prolificans, Exophiala dermatitidis and azole-resistant Aspergillus fumigatus

Lisa Kirchhoff, Silke Dittmer, Jan Buer, Peter-Michael Rath, Joerg Steinmann
International Journal of Antimicrobial Agents 2020 July 25, : 106105
32721601
In recent decades, invasive infections from fungal pathogens have been reported with increasing frequency. Concurrently, the rates of detected resistance-mechanisms against commonly used antifungal agents in fungi are increasing. The need for novel antifungal drugs is thus imminent. Here, the novel drug olorofim (F901318) has been tested for its antifungal activity against the human fungal pathogens Lomentospora prolificans (N = 20), Scedosporium aurantiacum (N = 2), Scedosporium apiospermum (N = 6), Rasamsonia argillacea species complex (N = 23), Exophiala dermatitidis (N = 10) and azole-resistant Aspergillus fumigatus (ARAF, N = 25) in an in vitro broth microdilution assay according to EUCAST recommendations. While olorofim has been ascertained to be effective against R. argillacea species complex (MIC ≤0.008 mg/L), Scedosporium spp. (MIC 0.03 - 0.5 mg/L), L. prolificans (MIC 0.03 - 0.5 mg/L) and ARAF (MIC ≤0.008 - 0.03 mg/L), the drug has been shown to exhibit MIC at > 4mg/L against E. dermatitidis. The obtained data demonstrate the antifungal activity of olorofim against a broad range of filamentous fungal pathogens.

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