Evidence map›Paper›PMID 26242307›Full record

ArticleBMC infectious diseases2015

Plasmodium falciparum merozoite surface protein 1 block 2 gene polymorphism in field isolates along the slope of mount Cameroon: a cross - sectional study.

Tobias O Apinjoh, Rolland B Tata, Judith K Anchang-Kimbi, Hanesh F Chi, Eleanor M Fon, Regina N Mugri, Delphine A Tangoh, Robert V Nyingchu, Stephen M Ghogomu, Theresa Nkuo-Akenji and 1 more

Abstract read
In one paragraph

Article in BMC infectious diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing 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

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

  1. Pooled it
  2. Genetic Diversity ofThe Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2026
    Article
  3. Article
  4. Article
  5. Geographical and temporal dynamics of genetic diversity ofJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2024
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. High genetic complexity but low relatedness inPathogens and global health · 2022
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Dynamics ofPathogens and global health · 2019
    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

11 authors.

Tobias O ApinjohDepartment of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon. apinjohtoby@yahoo.co.uk.
Rolland B TataDepartment of Microbiology and Parasitology, University of Buea, Buea, Cameroon. rollandbantar@yahoo.com.
Judith K Anchang-KimbiDepartment of Zoology and Animal Physiology, University of Buea, Buea, Cameroon. kuoh2000@yahoo.fr.
Hanesh F ChiDepartment of Microbiology and Parasitology, University of Buea, Buea, Cameroon. hanesh_chi@yahoo.com.
Eleanor M FonDepartment of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon. fon.eleanor@yahoo.com.
Regina N MugriDepartment of Microbiology and Parasitology, University of Buea, Buea, Cameroon. mugri72@yahoo.com.
Delphine A TangohDepartment of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon. anyetang@yahoo.com.
Robert V NyingchuDepartment of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon. robert.nyinchu@gmail.com.
Stephen M GhogomuDepartment of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon. mbigha@yahoo.co.uk.
Theresa Nkuo-AkenjiDepartment of Microbiology and Parasitology, University of Buea, Buea, Cameroon. wifon@yahoo.com.
Eric A AchidiDepartment of Biochemistry and Molecular Biology, University of Buea, Buea, Cameroon. achidi_e@yahoo.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMalaria remains a major global health burden despite the intensification of control efforts, due partly to the lack of an effective vaccine. Information on genetic diversity in natural parasite populations constitutes a major impediment to vaccine development efforts and is limited in some endemic settings. The present study characterized diversity by investigating msp1 block 2 polymorphisms and the relationship between the allele families with ethnodemographic indices and clinical phenotype.

methodIndividuals with asymptomatic parasitaemia (AP) or uncomplicated malaria (UM) were enrolled from rural, semi-rural and semi-urban localities at varying altitudes along the slope of mount Cameroon. P. falciparum malaria parasitaemic blood screened by light microscopy was depleted of leucocytes using CF11 cellulose columns and the parasite DNA genotyped by nested PCR.

resultsLength polymorphism was assessed in 151 field isolates revealing 64 (5) and 274 (22) distinct recombinant and major msp1 allelic fragments (genotypes) respectively. All family specific allelic types (K1, MAD20 and RO33) as well as MR were observed in the different locations, with K1 being most abundant. Eighty seven (60 %) of individuals harbored more than one parasite clone, with a significant proportion (p = 0.009) in rural compared to other settings. AP individuals had higher (p = 0.007) K1 allele frequencies but lower (p = 0.003) mean multiplicity of genotypes per infection (2.00 ± 0.98 vs. 2.56 ± 1.17) compared to UM patients.

conclusionsThese results indicate enormous diversity of P. falciparum in the area and suggests that allele specificity and complexity may be relevant for the progression to symptomatic disease.

Indexed as

AdolescentAdultAgedAllelesCameroonChildChild, PreschoolCross-Sectional StudiesDNA, ProtozoanFemaleGene FrequencyGenetic VariationGenotypeHumansInfantMalaria, FalciparumDNA, ProtozoanMerozoite Surface Protein 1

Identifiers

PMID26242307
PMCPMC4526171

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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.