Publication: Differential diagnosis of Plasmodium falciparum and Plasmodium vivax in mixed infection by colorimetric nanogold probes
Issued Date
2021-07-01
Resource Type
ISSN
10960309
00032697
00032697
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2-s2.0-85104053413
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Mahidol University
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SCOPUS
Bibliographic Citation
Analytical Biochemistry. Vol.624, (2021)
Suggested Citation
Nantawan Wangmaung, Sirinart Chomean, Wanida Ittarat Differential diagnosis of Plasmodium falciparum and Plasmodium vivax in mixed infection by colorimetric nanogold probes. Analytical Biochemistry. Vol.624, (2021). doi:10.1016/j.ab.2021.114173 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/76131
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Title
Differential diagnosis of Plasmodium falciparum and Plasmodium vivax in mixed infection by colorimetric nanogold probes
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Abstract
Malaria is an infectious disease reported mostly in the tropical region. The most severe human malaria is Plasmodium falciparum since it can cause cerebral malaria. Therefore, the presence of P. falciparum either in single or mixed infection needs accurate diagnosis. In some mixed infections, the presence of P. falciparum may be cryptic which cannot be detected by microscopic examination. The molecular diagnosis is required in these cases. Many methods based on amplification of malaria parasite genes have been developed but most of them need sophisticated instruments. Here, we created a colorimetric method using probe immobilized gold nanoparticles (AuNPs) to detect the malaria parasite gene. Color changes rely on salt-induced aggregation of AuNPs in the presence or absence of DNA hybridization. Color changes could be observed either by a naked eye or UV–vis spectrophotometer. By this approach, single infection by the most common malaria parasite, P. falciparum or P. vivax could be differentially identified. Mixed infection of these two malaria species could also be clearly diagnosed including cases of cryptic P. falciparum. The novel nanogold based molecular malaria diagnosis is sensitive, specific, rapid and cheap ($0.94). The prepared nanogold malaria probes are stable for up to 3 months indicating their filed application in remote areas.