Evidence map›Paper›PMID 24721983›Full record

ArticlePloS one2014

Assumed white blood cell count of 8,000 cells/μL overestimates malaria parasite density in the Brazilian Amazon.

Eduardo R Alves-Junior, Luciano T Gomes, Daniele Ribatski-Silva, Clebson Rodrigues J Mendes, Fabio A Leal-Santos, Luciano R Simões, Marcia Beatriz C Mello, Cor Jesus F Fontes

Abstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
–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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  5. Immunological, haematological, and clinical attributes of rural and urban malaria: a case-control study in Ghana.Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2021
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  9. Article
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  15. New laboratory perspectives for evaluation of vivax malaria infected patients: a useful tool for infection monitoring.The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases
    Article
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

8 authors.

Eduardo R Alves-JuniorJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil; Biomedicine Department, Univag University Centre, Varzea Grande, Mato Grosso, Brazil.
Luciano T GomesJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil; Biomedicine Department, Univag University Centre, Varzea Grande, Mato Grosso, Brazil; Medical Department, Facimed Course of Medicine, Cacoal, Rondônia, Brazil.
Daniele Ribatski-SilvaJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Clebson Rodrigues J MendesJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Fabio A Leal-SantosJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Luciano R SimõesJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Marcia Beatriz C MelloJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil.
Cor Jesus F FontesJulio Müller Hospital, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil; Medical Department, Facimed Course of Medicine, Cacoal, Rondônia, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Quantification of parasite density is an important component in the diagnosis of malaria infection. The accuracy of this estimation varies according to the method used. The aim of this study was to assess the agreement between the parasite density values obtained with the assumed value of 8,000 cells/μL and the automated WBC count. Moreover, the same comparative analysis was carried out for other assumed values of WBCs. The study was carried out in Brazil with 403 malaria patients who were infected in different endemic areas of the Brazilian Amazon. The use of a fixed WBC count of 8,000 cells/μL to quantify parasite density in malaria patients led to overestimated parasitemia and resulted in low reliability when compared to the automated WBC count. Assumed values ranging between 5,000 and 6,000 cells/μL, and 5,500 cells/μL in particular, showed higher reliability and more similar values of parasite density when compared between the 2 methods. The findings show that assumed WBC count of 5,500 cells/μL could lead to a more accurate estimation of parasite density for malaria patients in this endemic region.

Indexed as

Leukocyte CountAdolescentAdultAnimalsAutomationBrazilClinical Laboratory TechniquesFemaleHumansMalaria, FalciparumMalaria, VivaxMaleParasitemiaReproducibility of Results

Identifiers

PMID24721983
PMCPMC3983137

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.