Evaluating the Effects of Disinfectants on Bacterial Biofilms Using a Microfluidics Flow Cell and Time-Lapse...

Area of Science:

• Microbiology
• Biotechnology
• Analytical Chemistry

Background:

• Bacterial biofilms pose significant challenges in healthcare and industry.
• Effective disinfection strategies are crucial for controlling microbial contamination.
• Existing methods for evaluating disinfectants can be time-consuming and labor-intensive.

Purpose of the Study:

• To develop and validate a novel microfluidics-based system for evaluating disinfectant efficacy.
• To assess the impact of disinfectants on bacterial biofilm viability in real-time.
• To provide a rapid and reliable method for screening antimicrobial agents.

Main Methods:

• Utilized a commercial microfluidics flow cell integrated with widefield fluorescence microscopy.
• Cultured bacterial biofilms on the flow cell's inner surface.
• Employed a dual-fluorescent DNA probe to differentiate between live and damaged bacterial cells.
• Performed time-lapse imaging to quantify bacterial biomass response to disinfectant exposure.

Main Results:

• The microfluidics system successfully supported biofilm formation and allowed for controlled disinfectant application.
• Real-time imaging enabled quantitative tracking of disinfectant action on bacterial populations.
• The dual-fluorescent probe effectively distinguished between unharmed and damaged bacteria.
• The method demonstrated potential for rapid assessment of disinfectant effectiveness.

Conclusions:

• The integrated microfluidics and fluorescence microscopy approach offers a powerful tool for evaluating disinfectant efficacy.
• This method allows for rapid, quantitative, and real-time analysis of antimicrobial activity against bacterial biofilms.
• The procedure holds promise for accelerating the development and validation of new disinfectant products.