Evidence map›Paper›PMID 18791027›Full record

ArticleApplied and environmental microbiology2008

Rapid determination of Escherichia coli O157:H7 lineage types and molecular subtypes by using comparative genomic fingerprinting.

Chad Laing, Crystal Pegg, Davis Yawney, Kim Ziebell, Marina Steele, Roger Johnson, James E Thomas, Eduardo N Taboada, Yongxiang Zhang, Victor P J Gannon

Abstract readComparative Study
In one paragraph

Article in Applied and environmental microbiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–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

14 citing papers in PubMed.

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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.

Chad LaingLaboratory for Foodborne Zoonoses, Public Health Agency of Canada, Lethbridge, Alberta, Canada.
Crystal Pegg
Davis Yawney
Kim Ziebell
Marina Steele
Roger Johnson
James E Thomas
Eduardo N Taboada
Yongxiang Zhang
Victor P J Gannon

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this study, variably absent or present (VAP) regions discovered through comparative genomics experiments were targeted for the development of a rapid, PCR-based method to subtype and fingerprint Escherichia coli O157:H7. Forty-four VAP loci were analyzed for discriminatory power among 79 E. coli O157:H7 strains of 13 phage types (PT). Twenty-three loci were found to maximize resolution among strains, generating 54 separate fingerprints, each of which contained strains of unique PT. Strains from the three previously identified major E. coli O157:H7 lineages, LSPA6-LI, LSPA6-LI/II, and LSPA6-LII, formed distinct branches on a dendrogram obtained by hierarchical clustering of comparative genomic fingerprinting (CGF) data. By contrast, pulsed-field gel electrophoresis (PFGE) typing generated 52 XbaI digestion profiles that were not unique to PT and did not cluster according to O157:H7 lineage. Our analysis identified a subpopulation comprised of 25 strains from a closed herd of cattle, all of which were of PT87 and formed a cluster distinct from all other E. coli O157:H7 strains examined. CGF found five related but unique fingerprints among the highly clonal herd strains, with two dominant subtypes characterized by a shift from the presence of locus fprn33 to its absence. CGF had equal resolution to PFGE typing but with greater specificity, generating fingerprints that were unique among phenotypically related E. coli O157:H7 lineages and PT. As a comparative genomics typing method that is amenable for use in high-throughput platforms, CGF may be a valuable tool in outbreak investigations and strain characterization.

Indexed as

Genome, BacterialAnimalsBacterial Typing TechniquesCattleCluster AnalysisDeoxyribonucleases, Type II Site-SpecificDNA, BacterialDNA FingerprintingDNA PrimersElectrophoresis, Gel, Pulsed-FieldEscherichia coli O157GenotypeHumansPolymerase Chain ReactionPolymorphism, Restriction Fragment LengthDeoxyribonucleases, Type II Site-SpecificDNA, BacterialDNA Primersendodeoxyribonuclease XBAI

Identifiers

PMID18791027
PMCPMC2576696

What OpenQuestion holds

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Registered trials

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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.