Evidence map›Paper›PMID 21075895›Full record

ArticleApplied and environmental microbiology2011

Real-time PCR assay to differentiate Listeriolysin S-positive and -negative strains of Listeria monocytogenes.

Evelyn M Clayton, Colin Hill, Paul D Cotter, R Paul Ross

Open access · greenAbstract readEvaluation Study
In one paragraph

Article in Applied and environmental microbiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
2.0field-weighted citation impact, top 15% 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

28 citing papers in PubMed, 63 citations in OpenAlex.

  1. Prevalence and Antimicrobial Resistance ofFoods (Basel, Switzerland) · 2024
    Article
  2. Genomic and pathogenicity islands ofFrontiers in molecular biosciences · 2023
    Review
  3. Prevalence and transmission characteristics ofEmerging microbes & infections · 2021
    Article
  4. Listeriolysin S: A bacteriocin fromProceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  5. Article
  6. Whole Genome-Based Characterization ofFrontiers in microbiology · 2021
    Article
  7. Bacteriocins ofToxins · 2020
    Article
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  20. Bacteriocin from epidemic Listeria strains alters the host intestinal microbiota to favor infection.Proceedings of the National Academy of Sciences of the United States of America · 2016
    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

4 authors at 3 institutions in 1 country.

Evelyn M ClaytonDepartment of Microbiology, University College Cork, Cork, Ireland.
Colin Hill
Paul D Cotter
R Paul Ross
University College Cork · IEAlimentary Health (Ireland) · IETeagasc - The Irish Agriculture and Food Development Authority · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Due to the severity of the food-borne infection listeriosis, strict legislation governs the detectable and permissible limits at which Listeria monocytogenes is permitted in foods. These requirements, coupled with the ubiquitous nature of L. monocytogenes strains and the potential for epidemic outbreaks, mean that the pathogen can devastate affected sectors of the food industry. Although almost all L. monocytogenes strains have the potential to cause listeriosis, those implicated in the vast majority of epidemics belong to a subset of strains belonging to evolutionary lineage I. It has been established that a significant proportion of these strains, including those implicated in the majority of outbreaks, produce an additional hemolysin, designated listeriolysin S (LLS), which may be responsible for the enhanced virulence of these strains. In order to ultimately establish this definitively, it is important to first be able to rapidly discriminate between LLS-positive and -negative strains. Here, after essential genes within the LLS-encoding cluster, Listeria pathogenicity island 3, were identified by deletion mutagenesis, a real-time PCR assay which targets one such gene, llsX, was developed as a means of identifying LLS-positive L. monocytogenes. The specificity of the assay was validated against a panel of 40 L. monocytogenes strains (20 of which were LLS positive) and 25 strains representative of other Listeria species. Furthermore, 1 CFU of an LLS-positive strain per 25 g/ml of spiked foods was detected in less than 30 h when the assay was coupled with culture enrichment. The detection limit of this assay was 10 genome equivalents.

Indexed as

Bacteriological TechniquesFood MicrobiologyGene DeletionHemolysin ProteinsListeria monocytogenesPolymerase Chain ReactionSensitivity and SpecificityVirulence FactorsHemolysin Proteinslisteriolysin S, Listeria monocytogenesVirulence Factors

Identifiers

PMID21075895
PMCPMC3019701
OpenAlexW2121728189

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.