A versatile PDMS/paper hybrid microfluidic platform for sensitive infectious disease diagnosis

Area of Science:

• Biomedical Engineering
• Microfluidics
• Infectious Disease Diagnostics

Background:

• Bacterial meningitis is a life-threatening global health issue, particularly prevalent in impoverished regions.
• Current diagnostic methods often lack the speed, sensitivity, or cost-effectiveness required for timely detection.
• There is a critical need for accessible diagnostic tools for early meningitis identification.

Purpose of the Study:

• To develop a versatile, low-cost, and highly sensitive diagnostic method for bacterial meningitis.
• To enable rapid, instrument-free detection of Neisseria meningitidis (N. meningitidis).
• To create a platform suitable for point-of-care diagnostics in resource-limited environments.

Main Methods:

• Fabrication of a polydimethylsiloxane (PDMS)/paper hybrid microfluidic device.
• Integration of loop-mediated isothermal amplification (LAMP) for bacterial detection.
• Evaluation of device performance for N. meningitidis detection, including limit of detection and sample preparation.

Main Results:

• The PDMS/paper hybrid microfluidic device demonstrated stable and reliable LAMP reactions.
• Achieved a limit of detection of approximately 3 copies per LAMP zone for N. meningitidis within 45 minutes.
• Enabled instrument-free, rapid detection without complex sample preparation or centrifugation.

Conclusions:

• The developed hybrid microfluidic system offers a simple, sensitive, and cost-effective approach for diagnosing N. meningitidis.
• This platform provides on-site qualitative and laboratory-based quantitative analysis capabilities.
• The technology holds significant potential for point-of-care diagnosis of infectious diseases, especially in developing nations.