Evidence map›Paper›PMID 23747705›Full record

ArticleApplied and environmental microbiology2013

Shiga toxin 2-encoding bacteriophages in human fecal samples from healthy individuals.

Alexandre Martinez-Castillo, Pablo Quirós, Ferran Navarro, Elisenda Miró, Maite Muniesa

Erratum issuedOpen access · bronzeAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
5.8field-weighted citation impact, top 4% 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

25 citing papers in PubMed, 50 citations in OpenAlex.

  1. Review
  2. Review
  3. Review
  4. Article
  5. Do changes in STEC diagnostics mislead interpretation of disease surveillance data in Switzerland? Time trends in positivity, 2007 to 2016.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2020
    Article
  6. Article
  7. Rapid culture-based identification of Shiga toxin-producing Escherichia coli and Shigella spp./Enteroinvasive E. coli using the eazyplex® EHEC complete assay.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2020
    Article
  8. Characterization of Non-O157Microorganisms · 2019
    Article
  9. Implications of stx loss for clinical diagnostics of Shiga toxin-producing Escherichia coli.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2018
    Article
  10. Article
  11. Article
  12. Phage Therapy: Beyond Antibacterial Action.Frontiers in medicine · 2018
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. IDCases · 2017
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Alexandre Martinez-CastilloDepartment of Microbiology, University of Barcelona, Barcelona, Spain.
Pablo Quirós
Ferran Navarro
Elisenda Miró
Maite Muniesa
Universitat de Barcelona · ESHospital de Sant Pau · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Shiga toxin-converting bacteriophages (Stx phages) carry the stx gene and convert nonpathogenic bacterial strains into Shiga toxin-producing bacteria. Previous studies have shown that high densities of free and infectious Stx phages are found in environments polluted with feces and also in food samples. Taken together, these two findings suggest that Stx phages could be excreted through feces, but this has not been tested to date. In this study, we purified Stx phages from 100 fecal samples from 100 healthy individuals showing no enteric symptoms. The phages retrieved from each sample were then quantified by quantitative PCR (qPCR). In total, 62% of the samples carried Stx phages, with an average value of 2.6 × 10(4) Stx phages/g. This result confirms the excretion of free Stx phages by healthy humans. Moreover, the Stx phages from feces were able to propagate in enrichment cultures of stx-negative Escherichia coli (strains C600 and O157:H7) and in Shigella sonnei, indicating that at least a fraction of the Stx phages present were infective. Plaque blot hybridization revealed lysis by Stx phages from feces. Our results confirm the presence of infectious free Stx phages in feces from healthy persons, possibly explaining the environmental prevalence observed in previous studies. It cannot be ruled out, therefore, that some positive stx results obtained during the molecular diagnosis of Shiga toxin-producing Escherichia coli (STEC)-related diseases using stool samples are due to the presence of Stx phages.

Indexed as

AdolescentAdultAged, 80 and overColiphagesEscherichia coli O157FecesHumansInfantReal-Time Polymerase Chain ReactionSequence Homology, Nucleic AcidShiga-Toxigenic Escherichia coliShiga Toxin 2Shigella sonneiViral Plaque AssayShiga Toxin 2

Identifiers

PMID23747705
PMCPMC3754710
OpenAlexW2097121745

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.