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Updated: Feb 11, 2026
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Digital Microfluidics for Automated Proteomic Processing
Published on: November 6, 2009
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A digital microfluidic system for serological immunoassays in remote settings.
Alphonsus H C Ng1,2, Ryan Fobel1,2, Christian Fobel1,2
1Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.
Science Translational Medicine
|April 27, 2018
Summary
A new portable, point-of-care system using digital microfluidics can rapidly test for disease-specific antibodies from small blood samples. This technology offers a viable solution for serosurveillance in remote areas lacking laboratory access.
Area of Science:
- Biomedical Engineering
- Immunology
- Public Health
Background:
- Serosurveys are crucial for monitoring population immunity to vaccine-preventable diseases.
- Remote populations face significant logistical challenges in accessing centralized laboratory services for serological testing.
- Existing methods require specialized equipment, cold storage, and sample transport, hindering surveillance in resource-limited settings.
Purpose of the Study:
- To develop and validate a compact, field-deployable, point-of-care system for rapid serological testing.
- To assess the analytical performance of a digital microfluidics-based enzyme-linked immunosorbent assay (ELISA) for detecting measles and rubella immunoglobulin G (IgG) antibodies.
- To evaluate the system's utility in a remote refugee camp setting.
Main Methods:
- A point-of-care system utilizing digital microfluidics and inkjet-printed cartridges was developed to perform ELISAs on small capillary blood volumes.
- Field validation was conducted at Kakuma refugee camp, Kenya, testing children and caregivers for measles and rubella IgG antibodies.
- Assay performance was compared against reference ELISAs performed in a centralized laboratory.
Main Results:
- The digital microfluidics system demonstrated high sensitivity and specificity for detecting measles and rubella IgG antibodies in a field setting.
- Measles IgG assay sensitivity was 86% (95% CI, 79-91%) and specificity was 80% (95% CI, 49-94%).
- Rubella IgG assay sensitivity was 81% (95% CI, 73-88%) and specificity was 91% (95% CI, 76-97%).
Conclusions:
- The developed point-of-care digital microfluidics system is a promising tool for global serological surveillance.
- This technology can overcome logistical barriers, enabling effective disease monitoring in remote and underserved populations.
- The system facilitates rapid, on-site antibody testing, improving the timeliness and accessibility of public health data.
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