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• W4296236121 abstract "Abstract Invasive infections caused by filamentous fungi have increased considerably due to the alteration of the host's immune response. Recently, Aspergillus terreus is considered an emerging pathogen and has shown resistance to amphotericin B treatment, resulting in high mortality. The development of fungal biofilm is a virulence factor, and it has been described in some cases of invasive aspergillosis. In addition, although the general composition of fungal biofilms is known, findings related to biofilms of a lipid nature are rarely reported. In this study, we present the identification of a clinical strain of A. terreus by microbiological and molecular tools, also its in vitro biofilm development capacity: i) Biofilm formation was quantified by Crystal Violet (CV) and reduction of tetrazolium salts assays (MTT), and simultaneously the stages of biofilm development were described by Scanning Electron Microscopy in High Resolution (SEM-HR). ii) Characterization of the organizational structure of the biofilm was performed by SEM-HR. The hyphal networks developed on the surface, the abundant air channels created between the ECM (extracellular matrix) and the hyphae fused in anastomosis were described. Also, the presence of microhyphae is reported. iii) The chemical composition of the ECM was analyzed by SEM-HR and CLSM (Confocal Laser Scanning Microscopy). Proteins, carbohydrates, nucleic acids and a relevant presence of lipid components were identified. Some structures of apparent waxy appearance were highlighted by SEM-HR and backscatter-electron diffraction, for which CLSM was previously performed. To our knowledge, this work is the first description of a lipid-type biofilm in filamentous fungi, specifically of the species A. terreus from a clinical isolate." @default.
• W4296236121 created "2022-09-18" @default.
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• W4296236121 date "2022-09-09" @default.
• W4296236121 modified "2023-10-18" @default.
• W4296236121 title "Lipid-like biofilm from a clinical brain isolate of Aspergillus terreus: quantification, structural characterization and stages of the formation cycle." @default.
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• W4296236121 doi "https://doi.org/10.21203/rs.3.rs-2000080/v1" @default.
• W4296236121 hasPublicationYear "2022" @default.
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