Evidence map›Paper›PMID 21713026›Full record

ArticlePLoS neglected tropical diseases2011

Multilocus sequence typing (MLST) for lineage assignment and high resolution diversity studies in Trypanosoma cruzi.

Matthew Yeo, Isabel L Mauricio, Louisa A Messenger, Michael D Lewis, Martin S Llewellyn, Nidia Acosta, Tapan Bhattacharyya, Patricio Diosque, Hernan J Carrasco, Michael A Miles

Abstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
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61citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

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

  1. Pooled it
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  20. Review

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

4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

10 authors.

Matthew YeoLondon School of Hygiene and Tropical Medicine, London, United Kingdom. Matthew.yeo@lshtm.ac.uk
Isabel L Mauricio
Louisa A Messenger
Michael D Lewis
Martin S Llewellyn
Nidia Acosta
Tapan Bhattacharyya
Patricio Diosque
Hernan J Carrasco
Michael A Miles

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundMultilocus sequence typing (MLST) is a powerful and highly discriminatory method for analysing pathogen population structure and epidemiology. Trypanosoma cruzi, the protozoan agent of American trypanosomiasis (Chagas disease), has remarkable genetic and ecological diversity. A standardised MLST protocol that is suitable for assignment of T. cruzi isolates to genetic lineage and for higher resolution diversity studies has not been developed. METHODOLOGY/PRINCIPAL

findingsWe have sequenced and diplotyped nine single copy housekeeping genes and assessed their value as part of a systematic MLST scheme for T. cruzi. A minimum panel of four MLST targets (Met-III, RB19, TcGPXII, and DHFR-TS) was shown to provide unambiguous assignment of isolates to the six known T. cruzi lineages (Discrete Typing Units, DTUs TcI-TcVI). In addition, we recommend six MLST targets (Met-II, Met-III, RB19, TcMPX, DHFR-TS, and TR) for more in depth diversity studies on the basis that diploid sequence typing (DST) with this expanded panel distinguished 38 out of 39 reference isolates. Phylogenetic analysis implies a subdivision between North and South American TcIV isolates. Single Nucleotide Polymorphism (SNP) data revealed high levels of heterozygosity among DTUs TcI, TcIII, TcIV and, for three targets, putative corresponding homozygous and heterozygous loci within DTUs TcI and TcIII. Furthermore, individual gene trees gave incongruent topologies at inter- and intra-DTU levels, inconsistent with a model of strict clonality. CONCLUSIONS/SIGNIFICANCE: We demonstrate the value of systematic MLST diplotyping for describing inter-DTU relationships and for higher resolution diversity studies of T. cruzi, including presence of recombination events. The high levels of heterozygosity will facilitate future population genetics analysis based on MLST haplotypes.

Indexed as

Genetic VariationMultilocus Sequence TypingAnimalsChagas DiseaseGenes, ProtozoanGenotypeHumansTrypanosoma cruzi

Identifiers

PMID21713026
PMCPMC3119646

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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.