Evidence map›Paper›PMID 19144798›Full record

ArticleJournal of clinical microbiology2009

Biofilm formation by Staphylococcus haemolyticus.

Elizabeth Gladys Aarag Fredheim, Claus Klingenberg, Holger Rohde, Stephanie Frankenberger, Peter Gaustad, Trond Flaegstad, Johanna Ericson Sollid

Open access · greenAbstract read
In one paragraph

Article in Journal of clinical microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 86 papers.

0numbers the graph read from it
0cells of the map it votes in
86citing papers in PubMed
3.8field-weighted citation impact, top 6% 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

86 citing papers in PubMed, 223 citations in OpenAlex.

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  10. Pathogenic potential of meat-borne coagulase negative staphylococci strains from slaughterhouse to fork.International microbiology : the official journal of the Spanish Society for Microbiology · 2024
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  13. A Retrospective Descriptive Study ofAnimals : an open access journal from MDPI · 2024
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  16. Clonal Spreading of ST42International journal of molecular sciences · 2023
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  17. Review
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26 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

7 authors at 4 institutions in 2 countries.

Elizabeth Gladys Aarag FredheimDepartment of Pediatrics, Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway.
Claus Klingenberg
Holger Rohde
Stephanie Frankenberger
Peter Gaustad
Trond Flaegstad
Johanna Ericson Sollid
UiT The Arctic University of Norway · NOUniversität Hamburg · DEUniversity Medical Center Hamburg-Eppendorf · DEUniversity of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Infections due to coagulase-negative staphylococci (CoNS) most frequently occur after the implantation of medical devices and are attributed to the biofilm-forming potential of CoNS. Staphylococcus haemolyticus is the second most frequently isolated CoNS from patients with hospital-acquired infections. There is only limited knowledge of the nature of S. haemolyticus biofilms. The aim of this study was to characterize S. haemolyticus biofilm formation. We analyzed the biofilm-forming capacities of 72 clinical S. haemolyticus isolates. A detachment assay with NaIO(4), proteinase K, or DNase was used to determine the main biofilm components. Biofilm-associated genes, including the ica operon, were analyzed by PCR, and the gene products were sequenced. Confocal laser scanning microscopy (CLSM) was used to elucidate the biofilm structure. Fifty-three isolates (74%) produced biofilms after growth in Trypticase soy broth (TSB) with glucose, but only 22 (31%) produced biofilms after growth in TSB with NaCl. It was necessary to dissolve the biofilm in ethanol-acetone to measure the optical density of the full biofilm mass. DNase, proteinase K, and NaIO(4) caused biofilm detachment for 100%, 98%, and 38% of the isolates, respectively. icaRADBC and polysaccharide intercellular adhesin (PIA) production were found in only two isolates. CLSM indicated that the biofilm structure of S. haemolyticus clearly differs from that of S. epidermidis. We conclude that biofilm formation is a common phenotype in clinical S. haemolyticus isolates. In contrast to S. epidermidis, proteins and extracellular DNA are of functional relevance for biofilm accumulation, whereas PIA plays only a minor role. The induction of biofilm formation and determination of the biofilm mass also needed to be optimized for S. haemolyticus.

Indexed as

AdultBacterial ProteinsBiofilmsCluster AnalysisDNA, BacterialDNA FingerprintingElectrophoresis, Gel, Pulsed-FieldGenes, BacterialHumansInfant, NewbornMicroscopy, ConfocalMolecular Sequence DataPhylogenyPolysaccharides, BacterialSequence Analysis, DNASequence HomologyBacterial ProteinsDNA, BacterialPolysaccharides, Bacterial

Identifiers

PMID19144798
PMCPMC2668337
OpenAlexW2057291237

What OpenQuestion holds

Textmetadata
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.