Evidence map›Paper›PMID 22000348›Full record

ArticleEmerging infectious diseases2011

Plasmodium knowlesi Malaria in humans and macaques, Thailand.

Somchai Jongwutiwes, Pattakorn Buppan, Rattiporn Kosuvin, Sunee Seethamchai, Urassaya Pattanawong, Jeeraphat Sirichaisinthop, Chaturong Putaporntip

Open access · diamondAbstract read
In one paragraph

Article in Emerging infectious diseases, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 4 pooled it
10.0field-weighted citation impact, top 2% 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

77 citing papers in PubMed, 4 syntheses or guidelines pooled it, 123 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Article
  6. Article
  7. Epidemiology of malaria and leishmaniasis in Thailand (2004-2025): A systematic review.Current research in parasitology & vector-borne diseases · 2026
    Review
  8. Article
  9. First molecular detection of zoonoticInternational journal for parasitology. Parasites and wildlife · 2025
    Article
  10. Review
  11. Article
  12. Article
  13. Emerging malaria in Indonesia: An overview ofParasite epidemiology and control · 2025
    Article
  14. Molecular Prevalence and Identification of ZoonoticVeterinary medicine international · 2025
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Tropical medicine and infectious disease · 2023
    Review
  20. Article

17 more citing papers are in PubMed but not listed here.

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

7 authors at 1 institution in 1 country.

Somchai JongwutiwesChulalongkorn University, Bangkok, Thailand. jongwutiwes@gmail.com
Pattakorn Buppan
Rattiporn Kosuvin
Sunee Seethamchai
Urassaya Pattanawong
Jeeraphat Sirichaisinthop
Chaturong Putaporntip
Chulalongkorn University · TH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Naturally acquired human infections with Plasmodium knowlesi are endemic to Southeast Asia. To determine the prevalence of P. knowlesi malaria in malaria-endemic areas of Thailand, we analyzed genetic characteristics of P. knowlesi circulating among naturally infected macaques and humans. This study in 2008-2009 and retrospective analysis of malaria species in human blood samples obtained in 1996 from 1 of these areas showed that P. knowlesi accounted for 0.67% and 0.48% of human malaria cases, respectively, indicating that this simian parasite is not a newly emergent human pathogen in Thailand. Sequence analysis of the complete merozoite surface protein 1 gene of P. knowlesi from 10 human and 5 macaque blood samples showed considerable genetic diversity among isolates. The sequence from 1 patient was identical with that from a pig-tailed macaque living in the same locality, suggesting cross-transmission of P. knowlesi from naturally infected macaques to humans.

Indexed as

AdolescentAdultAgedAged, 80 and overAnimalsChildChild, PreschoolFemaleHumansInfantMacacaMalariaMaleMerozoite Surface Protein 1Middle AgedMolecular Sequence DataMerozoite Surface Protein 1

Identifiers

PMID22000348
PMCPMC3310673
OpenAlexW2105239718

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.