Evidence map›Paper›PMID 30911048›Full record

ArticleScientific reports2019

Molecular quantification of Plasmodium parasite density from the blood retained in used RDTs.

Ailie Robinson, Annette O Busula, Julian K Muwanguzi, Stephen J Powers, Daniel K Masiga, Teun Bousema, Willem Takken, Jetske G de Boer, James G Logan, Khalid B Beshir and 1 more

Abstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed.

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  12. Failure of rapid diagnostic tests in Plasmodium falciparum malaria cases among travelers to the UK and Ireland: Identification and characterisation of the parasites.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Ailie RobinsonLondon School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, United Kingdom. ailie.robinson@lshtm.ac.uk.
Annette O BusulaLaboratory of Entomology, Wageningen University & Research, 6708 PB, Wageningen, The Netherlands.
Julian K MuwanguziLondon School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, United Kingdom.
Stephen J PowersComputational and Analytical Sciences, Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom.
Daniel K MasigaAnimal Health, International Centre of Insect Physiology and Ecology, PO Box 30772-00100, Nairobi, Kenya.ORCID http://orcid.org/0000-0001-7513-0887
Teun BousemaLondon School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, United Kingdom.
Willem TakkenLaboratory of Entomology, Wageningen University & Research, 6708 PB, Wageningen, The Netherlands.
Jetske G de BoerLaboratory of Entomology, Wageningen University & Research, 6708 PB, Wageningen, The Netherlands.
James G LoganLondon School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, United Kingdom.
Khalid B BeshirLondon School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, United Kingdom.ORCID http://orcid.org/0000-0001-5108-8362
Colin J SutherlandLondon School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, United Kingdom.ORCID http://orcid.org/0000-0003-1592-6407

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Most malaria-endemic countries are heavily reliant upon rapid diagnostic tests (RDT) for malaria case identification and treatment. RDT previously used for malaria diagnosis can subsequently be used for molecular assays, including qualitative assessment of parasite species present or the carriage of resistance markers, because parasite DNA can be extracted from the blood inside the RDT which remains preserved on the internal components. However, the quantification of parasite density has not previously been possible from used RDT. In this study, blood samples were collected from school-age children in Western Kenya, in the form of both dried blood spots on Whatman filter paper, and the blood spot that is dropped into rapid diagnostic tests during use. Having first validated a robotic DNA extraction method, the parasite density was determined from both types of sample by duplex qPCR, and across a range of densities. The methods showed good agreement. The preservation of both parasite and human DNA on the nitrocellulose membrane inside the RDT was stable even after more than one year's storage. This presents a useful opportunity for researchers or clinicians wishing to gain greater information about the parasite populations that are being studied, without significant investment of resources.

Indexed as

Diagnostic Tests, RoutineDNA, ProtozoanFemaleHumansKenyaMalaria, FalciparumMalePlasmodiumPolymerase Chain ReactionDNA, Protozoan

Identifiers

PMID30911048
PMCPMC6434039

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.