Abstract
Candida spp. biofilm is considered highly resistant to conventional antifungals. The aim of this study was to investigate the in vitro effect of amphotericin B on Candida spp. biofilms at different stages of maturation. We investigated the activity of amphotericin B against 78 clinical isolates of Candida spp., representing three species, growing as planktonic and sessile cells, by a widely accepted broth microdilution method. The in vitro effect on sessile cell viability was evaluated by MTT reduction assay. All examined strains were susceptible to amphotericin B when grown as free-living cells. At the early stages of biofilm maturation 96.7–100.0 % strains, depending on species, displayed amphotericin B sessile minimal inhibitory concentration (SMIC) ≤1 μg/mL. Mature Candida spp. biofilm of 32.1–90.0 % strains displayed amphotericin B SMIC ≤1 μg/mL. Based on these results, amphotericin B displays species- and strain-depending activity against Candida spp. biofilms.
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This work was supported by the Nicolaus Copernicus University in Toruń, Ludwik Rydygier Collegium Medicum in Bydgoszcz (Grant Number 06/CM).
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Prażyńska, M., Gospodarek, E. In Vitro Effect of Amphotericin B on Candida albicans, Candida glabrata and Candida parapsilosis Biofilm Formation. Mycopathologia 177, 19–27 (2014). https://doi.org/10.1007/s11046-014-9727-7
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DOI: https://doi.org/10.1007/s11046-014-9727-7