Quantifying Enzyme-Induced Biofilm Suppression in Pathogenic Bacteria

Source: Tay, S. B., et al. Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases. J. Vis. Exp. (2016)The video demonstrates a method to quantify biofilm biomass in a pathogenic bacterium, comparing untreated controls with samples treated with a quorum-quenching enzyme. The enzyme disrupts bacterial signaling during early incubation, reducing cell adhesion. After washing and further incubation, control wells form dense biofilms, while treated wells show reduced formation. A cationic dye is used to stain the biofilm, and absorbance is measured to assess biomass.