Evidence map›Paper›PMID 22609915›Full record

ArticleJournal of bacteriology2012

Comparative genomic analyses of 17 clinical isolates of Gardnerella vaginalis provide evidence of multiple genetically isolated clades consistent with subspeciation into genovars.

Azad Ahmed, Josh Earl, Adam Retchless, Sharon L Hillier, Lorna K Rabe, Thomas L Cherpes, Evan Powell, Benjamin Janto, Rory Eutsey, N Luisa Hiller and 7 more

Abstract readComparative Study
In one paragraph

Article in Journal of bacteriology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 103 papers.

0numbers the graph read from it
0cells of the map it votes in
103citing 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

103 citing papers in PubMed.

  1. Article
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  5. Article
  6. Further dissection ofInternational journal of systematic and evolutionary microbiology · 2026
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  8. Review
  9. Genetic transformation ofInfection and immunity · 2025
    Article
  10. Strain-level differences inbioRxiv : the preprint server for biology · 2025
    Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. mSystems · 2024
    Article
  17. Article
  18. Article
  19. Infection and immunity · 2023
    Review
  20. Review

43 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

17 authors.

Azad AhmedCenter for Genomic Sciences, Allegheny Singer Research Institute, Pittsburgh, Pennsylvania, USA.
Josh Earl
Adam Retchless
Sharon L Hillier
Lorna K Rabe
Thomas L Cherpes
Evan Powell
Benjamin Janto
Rory Eutsey
N Luisa Hiller
Robert Boissy
Margaret E Dahlgren
Barry G Hall
J William Costerton
J Christopher Post
Fen Z Hu
Garth D Ehrlich

Funding

UNIVERSITY OF PITTSBURGH CLINICAL AND TRANSLATIONAL SCIENCE INSTITUTE: BPCAUL1RR024153 · NCRR · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI REIS, STEVEN E · 2006 to 2011
$73.9M
University of Pittsburgh Clinical and Translational Science InstituteUL1TR000005 · NCATS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI REIS, STEVEN E · 2012 to 2015
$50.8M
The UPMC Sexually Transmitted Infections Cooperative Research CenterU19AI084024 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI DARVILLE, TONI · 2009 to 2013
$12.9M
THE ROLE OF BIOFILMS IN THE PATHOGENESIS OF OTORRHEAR01DC004173 · NIDCD · ALLEGHENY-SINGER RESEARCH INSTITUTE · PI EHRLICH, GARTH D. · 2000 to 2008
$7.0M
MOLECULAR ANALYSIS OF PATHOGENS IN OTITIS MEDIA BY PCRR01DC002148 · NIDCD · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI EHRLICH, GARTH D. · 1994 to 2017
$6.5M
Impact of Antibiotics and Vaccines on the in vivo Evolution of S. pneumoniaeR01AI080935 · NIAID · ALLEGHENY-SINGER RESEARCH INSTITUTE · PI EHRLICH, GARTH D. · 2009 to 2010
$1.3M
NCATS NIH HHS UL1 TR000005NCRR NIH HHS UL1 RR024153NIAID NIH HHS AI080935NIAID NIH HHS R01 AI080935NIAID NIH HHS U19 AI084024NIAID NIH HHS U19AI084024NIDCD NIH HHS DC02148NIDCD NIH HHS DC02148-16S1NIDCD NIH HHS DC04173NIDCD NIH HHS R01 DC002148NIDCD NIH HHS R01 DC004173PHS HHS K23064396
6 · The paper itself

Abstract

Gardnerella vaginalis is associated with a spectrum of clinical conditions, suggesting high degrees of genetic heterogeneity among stains. Seventeen G. vaginalis isolates were subjected to a battery of comparative genomic analyses to determine their level of relatedness. For each measure, the degree of difference among the G. vaginalis strains was the highest observed among 23 pathogenic bacterial species for which at least eight genomes are available. Genome sizes ranged from 1.491 to 1.716 Mb; GC contents ranged from 41.18% to 43.40%; and the core genome, consisting of only 746 genes, makes up only 51.6% of each strain's genome on average and accounts for only 27% of the species supragenome. Neighbor-grouping analyses, using both distributed gene possession data and core gene allelic data, each identified two major sets of strains, each of which is composed of two groups. Each of the four groups has its own characteristic genome size, GC ratio, and greatly expanded core gene content, making the genomic diversity of each group within the range for other bacterial species. To test whether these 4 groups corresponded to genetically isolated clades, we inferred the phylogeny of each distributed gene that was present in at least two strains and absent in at least two strains; this analysis identified frequent homologous recombination within groups but not between groups or sets. G. vaginalis appears to include four nonrecombining groups/clades of organisms with distinct gene pools and genomic properties, which may confer distinct ecological properties. Consequently, it may be appropriate to treat these four groups as separate species.

Indexed as

Genome, BacterialPolymorphism, GeneticBacterial InfectionsBase CompositionCluster AnalysisDNA, BacterialGardnerella vaginalisGenes, BacterialGenotypeHumansMolecular Sequence DataPhylogenySequence Analysis, DNADNA, Bacterial

Identifiers

PMID22609915
PMCPMC3416530

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.