Oct 22, 2004

Characteristics of biofilm formation by Candida albicans

Revista iberoamericana de micología
Gordon RamageJose L Lopez-Ribot

Abstract

A variety of manifestations of Candida albicans infections are associated with the formation of biofilms on the surface of biomaterials. Cells in biofilms display phenotypic traits that are dramatically different from their free-floating planktonic counterparts, such as increased resistance to anti-microbial agents and protection form host defenses. Here, we describe the characteristics of C. albicans biofilm development using a 96 well microtitre plate model, microscopic observations and a colorimetric method based on the use of a modified tetrazolium salt (2,3-bis(2-methoxy-4-nitro-5-sulfo-phenyl)-2H-tetrazolium-5-carboxanilide, XTT) to monitor metabolic activities of cells within the biofilm. C. albicans biofilm formation was characterized by initial adherence of yeast cells (0-2 h), followed by germination and micro-colony formation (2-4 h), filamentation (4-6 h), monolayer development (6-8 h), proliferation (8-24 h) and maturation (24-48 h). The XTT-reduction assay showed a linear relationship between cellular density of the biofilm and metabolic activity. Serum and saliva pre-conditioning films increased the initial attachment of C. albicans, but had minimal effect on subsequent biofilm formation. Scanning electron micros...Continue Reading

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Mentioned in this Paper

Metabolic Process, Cellular
Candida albicans
Cyclodictyon albicans
Daiotyla albicans
Phenyl
Laser Microscopy
Cineraria albicans
Carex albicans
Codia albicans
Tetrazolium Salts

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