Evidence map›Paper›PMID 23175653›Full record

ArticleJournal of bacteriology2013

Multiple factors modulate biofilm formation by the anaerobic pathogen Clostridium difficile.

Tanja Ðapa, Tanja Dapa, Rosanna Leuzzi, Yen K Ng, Soza T Baban, Roberto Adamo, Sarah A Kuehne, Maria Scarselli, Nigel P Minton, Davide Serruto and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 168 papers.

0numbers the graph read from it
0cells of the map it votes in
168citing papers in PubMed
9.5field-weighted citation impact, top 1% 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

168 citing papers in PubMed, 286 citations in OpenAlex.

  1. The prevalence and molecular epidemiology ofEmerging microbes & infections · 2026
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  7. Acidification-dependent suppression ofbioRxiv : the preprint server for biology · 2026
    Article
  8. Vancomycin tolerance and dispersion of dual species biofilms ofbioRxiv : the preprint server for biology · 2026
    Article
  9. Clostridioides difficile pathogenesis and control.Nature reviews. Microbiology · 2026
    Review
  10. Article
  11. Dissecting the role of flagellar subunits inJournal of bacteriology · 2025
    Article
  12. Gut microbes · 2025
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  13. Article
  14. Article
  15. Article
  16. Community-AcquiredInternational journal of molecular sciences · 2025
    Review
  17. Article
  18. Article
  19. Article
  20. Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 3 institutions in 2 countries.

Tanja ÐapaNovartis Vaccines and Diagnostics, Siena, Italy.
Tanja Dapa
Rosanna Leuzzi
Yen K Ng
Soza T Baban
Roberto Adamo
Sarah A Kuehne
Maria Scarselli
Nigel P Minton
Davide Serruto
Meera Unnikrishnan
Novartis (Italy) · ITUniversity of Nottingham · GBNewron Pharmaceuticals (Italy) · IT

Funding

Medical Research Council G0601176
6 · The paper itself

Abstract

Bacteria within biofilms are protected from multiple stresses, including immune responses and antimicrobial agents. The biofilm-forming ability of bacterial pathogens has been associated with increased antibiotic resistance and chronic recurrent infections. Although biofilms have been well studied for several gut pathogens, little is known about biofilm formation by anaerobic gut species. The obligate anaerobe Clostridium difficile causes C. difficile infection (CDI), a major health care-associated problem primarily due to the high incidence of recurring infections. C. difficile colonizes the gut when the normal intestinal microflora is disrupted by antimicrobial agents; however, the factors or processes involved in gut colonization during infection remain unclear. We demonstrate that clinical C. difficile strains, i.e., strain 630 and the hypervirulent strain R20291, form structured biofilms in vitro, with R20291 accumulating substantially more biofilm. Microscopic and biochemical analyses show multiple layers of bacteria encased in a biofilm matrix containing proteins, DNA, and polysaccharide. Employing isogenic mutants, we show that virulence-associated proteins, Cwp84, flagella, and a putative quorum-sensing regulator, LuxS, are all required for maximal biofilm formation by C. difficile. Interestingly, a mutant in Spo0A, a transcription factor that controls spore formation, was defective for biofilm formation, indicating a possible link between sporulation and biofilm formation. Furthermore, we demonstrate that bacteria in clostridial biofilms are more resistant to high concentrations of vancomycin, a drug commonly used for treatment of CDI. Our data suggest that biofilm formation by C. difficile is a complex multifactorial process and may be a crucial mechanism for clostridial persistence in the host.

Indexed as

Anti-Bacterial AgentsBacterial AdhesionBiofilmsClostridioides difficileFlagellaMembrane ProteinsMicrobial Sensitivity TestsQuorum SensingSpores, BacterialTime FactorsVancomycinVancomycin ResistanceAnti-Bacterial AgentsMembrane ProteinsVancomycin

Identifiers

PMID23175653
PMCPMC3554014
OpenAlexW2162228116

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.