A microfluidic fully paper-based analytical device integrated with loop-mediated isothermal amplification and...

Area of Science:

• Microfluidics and Biosensing
• Infectious Disease Diagnostics
• Nanotechnology

Background:

• Bacterial meningitis is a leading cause of death and disability globally, particularly in developing nations.
• Current diagnostic methods for meningitis can be slow, costly, and inaccessible in resource-limited settings.
• There is a critical need for rapid, affordable, and user-friendly diagnostic approaches for meningitis.

Purpose of the Study:

• To develop a novel microfluidic fully paper-based analytical device (μFPAD) for the detection of Neisseria meningitidis.
• To integrate loop-mediated isothermal amplification (LAMP) and ssDNA-functionalized graphene oxide (GO) nano-biosensors for enhanced sensitivity.
• To provide a simple, rapid, low-cost, and quantitative diagnostic method for a primary cause of bacterial meningitis.

Main Methods:

• Development of a μFPAD incorporating LAMP for DNA amplification.
• Functionalization of graphene oxide (GO) with single-stranded DNA (ssDNA) for nano-biosensor capabilities.
• Testing the device's performance for detecting Neisseria meningitidis DNA.

Main Results:

• The developed μFPAD achieved quantitative detection of Neisseria meningitidis within 1 hour.
• The limit of detection (LOD) was as low as 6 DNA copies per detection zone, demonstrating high sensitivity.
• The device successfully performed qualitative, confirmatory, and quantitative diagnostic analyses.

Conclusions:

• The presented μFPAD enables simple, highly sensitive, and specific diagnosis of Neisseria meningitidis.
• This microfluidic approach offers a promising low-cost solution for meningitis detection in resource-limited settings.
• The technology has broad potential for the rapid detection of various other pathogens.