Evidence map›Paper›PMID 20668125›Full record

ArticleJournal of clinical microbiology2010

Virulence genes and genotypic associations in nasal carriage, community-associated methicillin-susceptible and methicillin-resistant USA400 Staphylococcus aureus isolates.

Sanjay K Shukla, Mary E Karow, Jennifer M Brady, Mary E Stemper, Jennifer Kislow, Natalie Moore, Katherine Wroblewski, Po-Huang Chyou, David M Warshauer, Kurt D Reed and 2 more

Open access · greenAbstract read
In one paragraph

Article in Journal of clinical microbiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
3.1field-weighted citation impact, top 8% 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

52 citing papers in PubMed, 84 citations in OpenAlex.

  1. Trial
  2. Impact of Methicillin Resistance on Outcomes ofOpen forum infectious diseases · 2026
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  6. Review
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  11. Genetic characterization of livestock-associated methicillin-resistant Staphylococcus aureus isolated in Greece.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2021
    Article
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  16. Review
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  19. Article
  20. Emergence of community-acquired methicillin-resistant Staphylococcus aureus EMRSA-15 clone as the predominant cause of diabetic foot ulcer infections in Portugal.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2020
    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

12 authors at 4 institutions in 1 country.

Sanjay K ShuklaMolecular Microbiology Laboratory, Marshfield Clinic Research Foundation, Marshfield, WI 54449, USA. shukla.sanjay@mcrf.mfldclin.edu
Mary E Karow
Jennifer M Brady
Mary E Stemper
Jennifer Kislow
Natalie Moore
Katherine Wroblewski
Po-Huang Chyou
David M Warshauer
Kurt D Reed
Ruth Lynfield
William R Schwan
Marshfield Clinic · USUniversity of Wisconsin–La Crosse · USMinnesota Department of Health · USNorthwestern University · US

Funding

Molecular Epidemiology of Community-Associated MRSAR01AI061385 · NIAID · MARSHFIELD CLINIC RESEARCH FOUNDATION · PI SHUKLA, SANJAY K · 2006 to 2008
$1.2M
NIAID NIH HHS AI061385NIAID NIH HHS R01 AI061385
6 · The paper itself

Abstract

It is not well understood why strains of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA), a major cause of skin and soft tissue infections, became successful so quickly, overtaking the place of methicillin-sensitive S. aureus (MSSA) in many communities. To evaluate the genetic basis of differences in their virulence traits, 293 S. aureus isolates consisting of three cohorts, genotypically defined clinical CA-MRSA (n = 77), clinical MSSA (n = 103), and nasal carriage MSSA (n = 113), collected over a 19-year period in two Midwestern states in the United States, were (i) extensively genotyped and (ii) screened for 40 known virulence genes which included those for enterotoxins, leukocidins, hemolysins, and surface proteins and several newly identified putative toxin genes from the USA400 lineage of CA-MRSA. Genotypically, nasal carriage and clinical MSSA isolates were much more diverse than was the CA-MRSA group, which was found to be of USA400 lineage only. Virulence gene profiles of the three groups showed that CA-MRSA strains harbored significantly higher percentages (≥95%; P value, <0.05) of the sea, sec, sec4, seg2, seh, sek, sel, sel2, ear, ssl1, lpl10, lukSF-PV, lukD, lukE, and clfA genes than did the carriage and the clinical MSSA group (range, 0% to 58%). Genes of the enterotoxin gene cluster, seg, sei, sem, sen, and seo, were present in the clinical and carriage isolates but not in the CA-MRSA group. These results suggest that the presence of additional virulence factors in USA400 CA-MRSA strains compared to the nasal carriage and clinical MSSA strains probably contributed to their enhanced virulence.

Indexed as

Carrier StateCommunity-Acquired InfectionsDNA, BacterialGenotypeHumansMethicillin ResistanceNasal MucosaPolymerase Chain ReactionStaphylococcal InfectionsStaphylococcus aureusUnited StatesVirulence FactorsDNA, BacterialVirulence Factors

Identifiers

PMID20668125
PMCPMC2953128
OpenAlexW2148798566

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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.