Evidence map›Paper›PMID 32951019›Full record

ArticleThe ISME journal2021

Quorum sensing controls persistence, resuscitation, and virulence of Legionella subpopulations in biofilms.

Nicolas Personnic, Bianca Striednig, Hubert Hilbi

Open access · bronzeAbstract read
In one paragraph

Article in The ISME journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
7.0field-weighted citation impact, top 2% 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

29 citing papers in PubMed, 59 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
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  5. Article
  6. Article
  7. Review
  8. Article
  9. Small molecule communication ofMicrobiology and molecular biology reviews : MMBR · 2024
    Review
  10. Article
  11. Ecology ofBiofilm · 2024
    Review
  12. Article
  13. Article
  14. Review
  15. Review
  16. Intracellular persister: A stealth agent recalcitrant to antibiotics.Frontiers in cellular and infection microbiology · 2023
    Review
  17. Bacterial persistence inFrontiers in cellular and infection microbiology · 2023
    Article
  18. Review
  19. The Effect Citrox BCL onAntioxidants (Basel, Switzerland) · 2022
    Article
  20. Review
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

3 authors at 1 institution in 1 country.

Nicolas PersonnicInstitute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland. npersonnic@imm.uzh.ch.ORCID http://orcid.org/0000-0003-4180-8260
Bianca StriednigInstitute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland.ORCID http://orcid.org/0000-0001-7575-8965
Hubert HilbiInstitute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland. hilbi@imm.uzh.ch.ORCID http://orcid.org/0000-0002-5462-9301
University of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The water-borne bacterium Legionella pneumophila is the causative agent of Legionnaires' disease. In the environment, the opportunistic pathogen colonizes different niches, including free-living protozoa and biofilms. The physiological state(s) of sessile Legionella in biofilms and their functional consequences are not well understood. Using single-cell techniques and fluorescent growth rate probes as well as promoter reporters, we show here that sessile L. pneumophila exhibits phenotypic heterogeneity and adopts growing and nongrowing ("dormant") states in biofilms and microcolonies. Phenotypic heterogeneity is controlled by the Legionella quorum sensing (Lqs) system, the transcription factor LvbR, and the temperature. The Lqs system and LvbR determine the ratio between growing and nongrowing sessile subpopulations, as well as the frequency of growth resumption ("resuscitation") and microcolony formation of individual bacteria. Nongrowing L. pneumophila cells are metabolically active, express virulence genes and show tolerance toward antibiotics. Therefore, these sessile nongrowers are persisters. Taken together, the Lqs system, LvbR and the temperature control the phenotypic heterogeneity of sessile L. pneumophila, and these factors regulate the formation of a distinct subpopulation of nongrowing, antibiotic tolerant, virulent persisters. Hence, the biofilm niche of L. pneumophila has a profound impact on the ecology and virulence of this opportunistic pathogen.

Indexed as

LegionellaLegionella pneumophilaBiofilmsQuorum SensingVirulence

Identifiers

PMID32951019
PMCPMC7852695
OpenAlexW3087398517

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.