Evidence map›Paper›PMID 34851950›Full record

ArticlePLoS neglected tropical diseases2021

Biogeography and genetic diversity of clinical isolates of Burkholderia pseudomallei in Sri Lanka.

Himali S Jayasinghearachchi, Enoka M Corea, Kumari I Jayaratne, Regina A Fonseka, Thilini A Muthugama, Jayanthi Masakorala, Ravija Yc Ramasinghe, Aruna D De Silva

Open access · goldAbstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.8field-weighted citation impact, top 14% 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

11 citing papers in PubMed, 16 citations in OpenAlex.

  1. Characterization of an isogenicInfection and immunity · 2026
    Article
  2. Laboratory diagnosis of melioidosis.PLoS neglected tropical diseases · 2025
    Review
  3. BimAIJID regions · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. The Expanding Global Footprint of Burkholderia pseudomallei and Melioidosis.The American journal of tropical medicine and hygiene · 2023
    Article
  10. Burden of melioidosis in India and South Asia: Challenges and ways forward.The Lancet regional health. Southeast Asia · 2022
    Review
  11. Frontiers in veterinary science · 2022
    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 at 2 institutions in 1 country.

Himali S JayasinghearachchiInstitute for Combinatorial Advance Research and Education (KDU-CARE), General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka.ORCID 0000-0002-9188-1557
Enoka M CoreaDepartment of Medical Microbiology and Immunology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.ORCID 0000-0003-1450-2098
Kumari I JayaratneBiomedical Laboratory 2, Faculty of Medicine, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka.
Regina A FonsekaDepartment of Medical Microbiology and Immunology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.ORCID 0000-0002-3997-3876
Thilini A MuthugamaBiomedical Laboratory 2, Faculty of Medicine, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka.
Jayanthi MasakoralaDepartment of Medical Microbiology and Immunology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.
Ravija Yc RamasingheBiomedical Laboratory 2, Faculty of Medicine, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka.
Aruna D De SilvaBiomedical Laboratory 2, Faculty of Medicine, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka.ORCID 0000-0001-5291-9543
General Sir John Kotelawala Defence University · LKUniversity of Colombo · LK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMelioidosis is a potentially fatal infectious disease caused by Burkholderia pseudomallei and the disease is endemic in Southeast Asia and Northern Australia. It has been confirmed as endemic in Sri Lanka. Genomic epidemiology of B. pseudomallei in Sri Lanka is largely unexplored. This study aims to determine the biogeography and genetic diversity of clinical isolates of B. pseudomallei and the phylogenetic and evolutionary relationship of Sri Lankan sequence types (STs) to those found in other endemic regions of Southeast Asia and Oceania.

methodsThe distribution of variably present genetic markers [Burkholderia intracellular motility A (bimA) gene variants bimABP/bimABM, filamentous hemagglutinin 3 (fhaB3), Yersinia-like fimbrial (YLF) and B. thailandensis-like flagellum and chemotaxis (BTFC) gene clusters and lipopolysaccharide O-antigen type A (LPS type A)] was examined among 310 strains. Multilocus sequence typing (MLST) was done for 84 clinical isolates. The phylogenetic and evolutionary relationship of Sri Lankan STs within Sri Lanka and in relation to those found in other endemic regions of Southeast Asia and Oceania were studied using e BURST, PHYLOViZ and minimum evolutionary analysis.

resultsThe Sri Lankan B. pseudomallei population contained a large proportion of the rare BTFC clade (14.5%) and bimABM allele variant (18.5%) with differential geographic distribution. Genotypes fhaB3 and LPSA were found in 80% and 86% respectively. This study reported 43 STs (including 22 novel). e-BURST analysis which include all Sri Lankan STs (71) resulted in four groups, with a large clonal group (group 1) having 46 STs, and 17 singletons. ST1137 was the commonest ST. Several STs were shared with India, Bangladesh and Cambodia.

conclusionThis study demonstrates the usefulness of high-resolution molecular typing to locate isolates within the broad geographical boundaries of B. pseudomallei at a global level and reveals that Sri Lankan isolates are intermediate between Southeast Asia and Oceania.

Indexed as

Genetic VariationBiological EvolutionBurkholderia pseudomalleiDNA, BacterialFemaleGenotypeHumansMaleMelioidosisMultilocus Sequence TypingPhylogeographySri LankaDNA, Bacterial

Identifiers

PMID34851950
PMCPMC8824316
OpenAlexW3215263539

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.