Evidence map›Paper›PMID 25884875›Full record

ArticleMalaria journal2015

Molecular epidemiology of Plasmodium vivax and Plasmodium falciparum malaria among Duffy-positive and Duffy-negative populations in Ethiopia.

Eugenia Lo, Delenasaw Yewhalaw, Daibin Zhong, Endalew Zemene, Teshome Degefa, Kora Tushune, Margaret Ha, Ming-Chieh Lee, Anthony A James, Guiyun Yan

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed, 2 pooled it
4.6field-weighted citation impact, top 5% of its field
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

57 citing papers in PubMed, 2 syntheses or guidelines pooled it, 83 citations in OpenAlex.

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  11. High prevalence of mixedmedRxiv : the preprint server for health sciences · 2025
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  15. Mediterranean journal of hematology and infectious diseases · 2025
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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

10 authors at 2 institutions in 2 countries.

Eugenia LoProgram in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92697, USA. eugenia.loyy@gmail.com.
Delenasaw YewhalawDepartment of Medical Laboratory Sciences and Pathology, College of Public Health and Medical Sciences, Jimma University, Jimma, Ethiopia. delenasaw.yewhalaw@ju.edu.et.
Daibin ZhongProgram in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92697, USA. dzhong@uci.edu.
Endalew ZemeneDepartment of Medical Laboratory Sciences and Pathology, College of Public Health and Medical Sciences, Jimma University, Jimma, Ethiopia. endalew.zemene@ju.edu.et.
Teshome DegefaDepartment of Medical Laboratory Sciences and Pathology, College of Public Health and Medical Sciences, Jimma University, Jimma, Ethiopia. teshedege@gmail.com.
Kora TushuneDepartment of Health Services Management, College of Public Health and Medical Sciences, Jimma University, Jimma, Ethiopia. kora.tushune@ju.edu.et.
Margaret HaProgram in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92697, USA. margarh1@uci.edu.
Ming-Chieh LeeProgram in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92697, USA. mingchil@uci.edu.
Anthony A JamesDepartments of Microbiology & Molecular Genetics and Molecular Biology & Biochemistry, University of California at Irvine, Irvine, CA, 92697, USA. aajames@uci.edu.
Guiyun YanProgram in Public Health, College of Health Sciences, University of California at Irvine, Irvine, CA, 92697, USA. guiyuny@uci.edu.
University of California, Irvine · USJimma University · ET

Funding

Research Training in Mosquito Genomics and Bioinformat*D43TW001505 · FIC · UNIVERSITY OF CALIFORNIA-IRVINE · PI Guiyun Yan · 2000 to 2026
$6.0M
Expression of Exogenous Genes in Vector MosquitoesR37AI029746 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI JAMES, ANTHONY A. · 2007 to 2016
$3.6M
EXPRESSION OF EXOGENOUS GENES IN VECTOR MOSQUITOESR01AI029746 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI JAMES, ANTHONY A. · 1989 to 2006
$1.7M
Molecular Epidemiology of Vivax Malaria in EthiopiaR21AI101802 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI YAN, GUIYUN · 2013 to 2014
$509k
FIC NIH HHS D43 TW001505NIAID NIH HHS AI29746NIAID NIH HHS R01 AI029746NIAID NIH HHS R21 AI101802NIAID NIH HHS R37 AI029746
6 · The paper itself

Abstract

backgroundMalaria is the most prevalent communicable disease in Ethiopia, with 75% of the country's landmass classified as endemic for malaria. Accurate information on the distribution and clinical prevalence of Plasmodium vivax and Plasmodium falciparum malaria in endemic areas, as well as in Duffy-negative populations, is essential to develop integrated control strategies.

methodsA total of 390 and 416 community and clinical samples, respectively, representing different localities and age groups across Ethiopia were examined. Malaria prevalence was estimated using nested PCR of the 18S rRNA region. Parasite gene copy number was measured by quantitative real-time PCR and compared between symptomatic and asymptomatic samples, as well as between children/adolescents and adults from the local community. An approximately 500-bp segment of the human DARC gene was amplified and sequenced to identify Duffy genotype at the -33rd nucleotide position for all the clinical and community samples.

resultsPlasmodium vivax prevalence was higher in the south while P. falciparum was higher in the north. The prevalence of P. vivax and P. falciparum malaria is the highest in children compared to adolescents and adults. Four P. vivax infections were detected among the Duffy-negative samples. Samples from asymptomatic individuals show a significantly lower parasite gene copy number than those from symptomatic infections for P. vivax and P. falciparum.

conclusionsGeographical and age differences influence the distribution of P. vivax and P. falciparum malaria in Ethiopia. These findings offer evidence-based guidelines in targeting malaria control efforts in the country.

Indexed as

Malaria, FalciparumMalaria, VivaxAdolescentChildChild, PreschoolCross-Sectional StudiesDuffy Blood-Group SystemHumansInfantInfant, NewbornMolecular EpidemiologyPlasmodium falciparumPlasmodium vivaxPolymerase Chain ReactionPrevalenceReceptors, Cell SurfaceACKR1 protein, humanDuffy Blood-Group SystemReceptors, Cell Surface

Identifiers

PMID25884875
PMCPMC4340780
OpenAlexW2076551648

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.