Epidemiology of echinocandin resistance in Candida

Current Fungal Infection Reports
Nina T GrossmanShawn R Lockhart

Abstract

Echinocandins are the newest antifungal agents approved for use in treating Candida infections in the US. They act by interfering with 1,3-β-D-glucan synthase and therefore disrupt cell wall production and lead to Candida cell death. There is no intrinsic resistance to echinocandins among Candida species, and isolates from historic collections archived before the release of the echinocandins show no resistance. Resistance to the echinocandins remains low among most Candida species and ranges overall from 0-1%. Among isolates of Candida glabrata, the proportion of resistant isolates is higher and has been reported to be as high as 13.5% in at least one hospital. Antifungal resistance is due to specific amino acid mutations in the Fksp subunit(s) of the 1,3-β-D-glucan synthase protein which are localized to one of two hotspots. These mutations are being recognized in isolates from patients who have failed echinocandin therapy, and often lead to a poor outcome. While the future looks bright for the echinocandins against most Candida species, C. glabrata remains a species of concern and resistance rates of C. glabrata to the echinocandins should be monitored closely.

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Citations

Oct 7, 2015·Antimicrobial Agents and Chemotherapy·Sandra A AsnerDominique Sanglard
May 7, 2020·Antibiotics·Martyna Mroczyńska, Anna Brillowska-Dąbrowska
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Aug 3, 2021·Evidence-based Complementary and Alternative Medicine : ECAM·Mohammad Zubair Alam, Mohd Sajjad Ahmad Khan

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