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Development and evaluation of PlasmoPod: A cartridge-based nucleic acid amplification test for rapid malaria diagnosis and surveillance
27, Bechtold et al. || Read the full article on PubMed
Malaria surveillance is hampered by the widespread use of diagnostic tests with low sensitivity. Adequate molecular malaria diagnostics are often only available in centralized laboratories. PlasmoPod is a novel cartridge-based nucleic acid amplification test for rapid, sensitive, and quantitative detection of malaria parasites. PlasmoPod is based on reverse-transcription quantitative polymerase chain reaction (RT-qPCR) of the highly abundant Plasmodium spp. 18S ribosomal RNA/DNA biomarker and is run on a portable qPCR instrument which allows diagnosis in less than 30 minutes. Our analytical performance evaluation indicates that a limit-of-detection as low as 0.02 parasites/μL can be achieved and no cross-reactivity with other pathogens common in malaria endemic regions was observed. In a cohort of 102 asymptomatic individuals from Bioko Island with low malaria parasite densities, PlasmoPod accurately detected 83 cases, resulting in an overall detection rate of 81.4%. Notably, there was a strong correlation between the Cq values obtained from the reference RT-qPCR assay and those obtained from PlasmoPod. In an independent cohort, using dried blood spots from malaria symptomatic children living in the Central African Republic, we demonstrated that PlasmoPod outperforms malaria rapid diagnostic tests based on the PfHRP2 and panLDH antigens as well as thick blood smear microscopy. Our data suggest that this 30-minute sample-to-result RT-qPCR procedure is likely to achieve a diagnostic performance comparable to a standard laboratory-based RT-qPCR setup. We believe that the PlasmoPod rapid NAAT could enable widespread accessibility of high-quality and cost-effective molecular malaria surveillance data through decentralization of testing and surveillance activities, especially in elimination settings.
Read the full article here: https://pubmed.ncbi.nlm.nih.gov/37756280/
Copyright: © 2023 Bechtold et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
diaxxoPod (RUO)
Our in-vitro diagnostic test cartridge based on rapid Polymerase Chain Reaction (PCR) amplification technology. This cartridge can reliably detect and distinguish the mutants from UK (20I/501Y.V1, B.1.1.7 – VOC-202012/01) as well as the South African mutation (B.1.351 lineage).
The test cartridge is aimed to improve the public health situation by rapidly enabling the detection of variants of concern. The cartridge is designed for qualitative detection of variants of interest of the SARS-CoV-2 Viral RNA in saliva samples and it works in conjuction with diaxxoPCR.
The test cartridges are sold with all the necessary reagents pre-loaded in the reaction wells. The use of the test cartridges is therefore extremely simple:
diaxxoPod
The test cartridges are sold with all the necessary reagents pre-loaded in the reaction wells. The use of the test cartridges is therefore extremely simple:
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