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© Research
Publication : Open forum infectious diseases

A Novel Single-Nucleotide Polymorphism Loop Mediated Isothermal Amplification Assay for Detection of Artemisinin-Resistant Malaria

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Open forum infectious diseases - 09 Jan 2018

Mohon AN, Menard D, Alam MS, Perera K, Pillai DR

Link to Pubmed [PMID] – 29707598

Open Forum Infect Dis 2018 Apr;5(4):ofy011

Background: Artemisinin-resistant malaria (ARM) remains a significant threat to malaria elimination. In the Greater Mekong subregion, the prevalence of ARM in certain regions has reached greater than 90%. Artemisinin-resistant malaria is clinically identified by delayed parasite clearance and has been associated with mutations in the propeller domain of the 13 gene. C580Y is the most prevalent mutation. The detection of ARM currently relies on labor-intensive and time-consuming methods such as clinical phenotyping or in vitro susceptibility testing.

Methods: We developed a novel single-nucleotide polymorphism loop mediated isothermal amplification (SNP-LAMP) test method for the detection of the C580Y mutation using a novel primer design strategy.

Results: The SNP-LAMP was 90.0% sensitive (95% confidence interval [CI], 66.9-98.3) and 91.9% specific (95% CI, 82.6-96.7) without knowledge of the parasite load and was 100% sensitive (95% CI, 79.9-100) and 97.3% specific (95% CI, 89.7-99.5) when the parasitemia was within the assay dynamic range. Tests with potential application near-to-patient such as SNP-LAMP may be deployed in low- and middle-income and developed countries.

Conclusions: Single-nucleotide polymorphism LAMP can serve as a surveillance tool and guide treatment algorithms for ARM in a clinically relevant time frame, prevent unnecessary use of additional drugs that may drive additional resistance, and avoid longer treatment regimens that cause toxicity for the patient.