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• W2154519333 abstract "Abstract Background Loop-mediated isothermal amplification (LAMP) is a high performance method for detecting DNA and holds promise for use in the molecular detection of infectious pathogens, including Plasmodium spp. However, in most malaria-endemic areas, which are often resource-limited, current LAMP methods are not feasible for diagnosis due to difficulties in accurately interpreting results with problems of sensitive visualization of amplified products, and the risk of contamination resulting from the high quantity of amplified DNA produced. In this study, we establish a novel visualized LAMP method in a closed-tube system, and validate it for the diagnosis of malaria under simulated field conditions. Methods A visualized LAMP method was established by the addition of a microcrystalline wax-dye capsule containing the highly sensitive DNA fluorescence dye SYBR Green I to a normal LAMP reaction prior to the initiation of the reaction. A total of 89 blood samples were collected on filter paper and processed using a simple boiling method for DNA extraction, and then tested by the visualized LAMP method for Plasmodium vivax infection. Results The wax capsule remained intact during isothermal amplification, and released the DNA dye to the reaction mixture only when the temperature was raised to the melting point following amplification. Soon after cooling down, the solidified wax sealed the reaction mix at the bottom of the tube, thus minimizing the risk of aerosol contamination. Compared to microscopy, the sensitivity and specificity of LAMP were 98.3% (95% confidence interval (CI): 91.1-99.7%) and 100% (95% CI: 88.3-100%), and were in close agreement with a nested polymerase chain reaction method. Conclusions This novel, cheap and quick visualized LAMP method is feasible for malaria diagnosis in resource-limited field settings." @default.
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• W2154519333 date "2011-06-21" @default.
• W2154519333 modified "2023-10-18" @default.
• W2154519333 title "Adaptation of a visualized loop-mediated isothermal amplification technique for field detection of Plasmodium vivax infection" @default.
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• W2154519333 doi "https://doi.org/10.1186/1756-3305-4-115" @default.
• W2154519333 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3127850" @default.
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