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Updated: Jun 12, 2026
Methods to Increase the Sensitivity of High Resolution Melting Single Nucleotide Polymorphism Genotyping in Malaria
Published on: November 10, 2015
Mitochondrial DNA targets increase sensitivity of malaria detection using loop-mediated isothermal amplification
Spencer D Polley1, Yasuyoshi Mori, Julie Watson
1Department of Clinical Parasitology, Hospital for Tropical Diseases, London Hospitals University College NHS Foundation Trust, Mortimer Market, Capper Street, London WC1E 6JB, United Kingdom. Spencer.Polley@UCLH.NHS.UK
This study introduces a new, highly sensitive method for malaria diagnosis using loop-mediated isothermal amplification (LAMP) targeting mitochondrial DNA. This rapid point-of-care diagnostic approach detects Plasmodium parasites with unprecedented accuracy.
Area of Science:
- Molecular Biology
- Parasitology
- Medical Diagnostics
Background:
- Loop-mediated isothermal amplification (LAMP) is a sensitive DNA detection method suitable for point-of-care diagnostics.
- Previous malaria LAMP diagnostics targeted the small-subunit rRNA gene, achieving sensitivities around 100 parasites/µL for Plasmodium falciparum.
- There is a need for more sensitive and rapid diagnostic tools for malaria detection, especially at the point-of-care.
Purpose of the Study:
- To develop a more sensitive LAMP assay for malaria detection.
- To utilize mitochondrial DNA targets for genus-wide Plasmodium detection and specific P. falciparum detection.
- To establish a rapid, sensitive, and point-of-care diagnostic method for malaria.
Main Methods:
- Developed and optimized LAMP assays targeting Plasmodium mitochondrial DNA.
- Evaluated the sensitivity of the new LAMP targets using blood samples with varying parasite concentrations.
- Assessed amplification in real-time using turbidimetry for rapid detection.
Main Results:
- The novel mitochondrial targets enabled LAMP-based detection of Plasmodium parasites, including P. falciparum, with high sensitivity.
- Routine amplification was achieved from blood samples containing as few as five parasites per microliter.
- Amplification and detection were completed within 30–40 minutes.
Conclusions:
- LAMP targeting Plasmodium mitochondrial DNA offers significantly improved sensitivity for malaria diagnosis compared to previous rRNA-targeted methods.
- This method provides rapid, sensitive, and point-of-care malaria detection, outperforming microscopy and lateral flow immunoassays.
- The developed assay holds promise for effective malaria control and management strategies.
