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Non-Invasive Malaria Detection in Sub-Saharan Africa Using a DNA-Based Sensor System.

Trine Juul-Kristensen1, Celine Thiesen1,2, Line Wulff Haurum1

  • 1Department of Molecular Biology and Genetics, Universitetsbyen 81, Aarhus University, 8000 Aarhus, Denmark.

Sensors (Basel, Switzerland)
|January 8, 2025
PubMed
Summary

This study introduces a novel malaria diagnostic method using saliva samples and a Rolling-circle-Enhanced-Enzyme-Activity-Detection (REEAD) sensor. This non-invasive approach shows promise for malaria screening in high-risk regions.

Keywords:
diagnosismalariarolling circle amplificationsalivatopoisomerase 1

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Area of Science:

  • * Molecular diagnostics
  • * Parasitology
  • * Global health

Background:

  • * Malaria remains a significant global health threat, affecting half the world's population.
  • * Current blood-based diagnostic methods face logistical challenges in malaria-endemic areas.
  • * Non-invasive diagnostic tools are needed to improve malaria surveillance and control.

Purpose of the Study:

  • * To demonstrate the detection of Plasmodium parasites in saliva using a novel sensor system.
  • * To evaluate the feasibility of this technology in a high-malaria-burden region.
  • * To develop an affordable, portable diagnostic tool for malaria screening.

Main Methods:

  • * Development of a DNA-based Rolling-circle-Enhanced-Enzyme-Activity-Detection (REEAD) sensor system.
  • * Integration of the REEAD sensor with a chemiluminescence readout and a portable reader.
  • * Application of the technology to analyze non-invasive saliva samples from individuals in Gabon.

Main Results:

  • * Successful detection of Plasmodium parasites in saliva samples from infected individuals.
  • * Significant difference observed between malaria-positive and presumed negative individuals (p < 0.00001).
  • * Proof-of-concept study conducted in sub-Saharan Africa with a high malaria burden.

Conclusions:

  • * The REEAD sensor system offers a promising non-invasive method for malaria detection in saliva.
  • * This technology has been successfully applied in a high-epidemic area, demonstrating its potential utility.
  • * The developed portable reader supports potential future use for malaria diagnosis and surveillance in resource-limited settings.