Evidence map›Paper›PMID 18509454›Full record

ArticlePloS one2008

Variations of plasmid content in Rickettsia felis.

Pierre-Edouard Fournier, Lokmane Belghazi, Catherine Robert, Khalid Elkarkouri, Allen L Richards, Gilbert Greub, François Collyn, Motohiko Ogawa, Arantxa Portillo, Jose A Oteo and 3 more

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in PloS one, 2008. 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 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
3.4field-weighted citation impact, top 8% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Pooled it
  2. Culture Isolate ofInternational journal of environmental research and public health · 2022
    Article
  3. Epidemiological serosurvey of vector-borne and zoonotic pathogens among homeless people living in shelters in Marseille: cross-sectional one-day surveys (2005-2015).European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2020
    Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. An update on the detection and treatment ofResearch and reports in tropical medicine · 2012
    Review
  9. Article
  10. Article
  11. Human Infection with Rickettsia felis, Kenya.Emerging infectious diseases · 2010
    Article
  12. Article
  13. Article
  14. Ecology of Rickettsia felis: a review.Journal of medical entomology · 2009
    Review
  15. Article
  16. Article
  17. Current tropical medicine reports
    Review
4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

13 authors at 10 institutions in 7 countries.

Pierre-Edouard FournierUnité des rickettsies, IFR 48, CNRS-IRD UMR 6236, Faculté de médecine, Université de la Méditerranée, Marseille, France.
Lokmane Belghazi
Catherine Robert
Khalid Elkarkouri
Allen L Richards
Gilbert Greub
François Collyn
Motohiko Ogawa
Arantxa Portillo
Jose A Oteo
Anna Psaroulaki
Idir Bitam
Didier Raoult
Centre National de la Recherche Scientifique · FRUniversity of Lausanne · CHCenter for Biomedical Research of La Rioja · ESHospital San Pedro · ESInstitut de Neurobiologie de la Méditerranée · FRInstitut de Recherche pour le Développement · FRInstitut Pasteur d'Algérie · DZNational Institute of Infectious Diseases · JPNaval Medical Research Command · USUniversity of Crete · GR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSince its first detection, characterization of R. felis has been a matter of debate, mostly due to the contamination of an initial R. felis culture by R. typhi. However, the first stable culture of R. felis allowed its precise phenotypic and genotypic characterization, and demonstrated that this species belonged to the spotted fever group rickettsiae. Later, its genome sequence revealed the presence of two forms of the same plasmid, physically confirmed by biological data. In a recent article, Gillespie et al. (PLoS One. 2007;2(3):e266.) used a bioinformatic approach to refute the presence of the second plasmid form, and proposed the creation of a specific phylogenetic group for R. felis. METHODOLOGY/PRINCIPAL

findingsIn the present report, we, and five independent international laboratories confirmed unambiguously by PCR the presence of two plasmid forms in R. felis strain URRWXCal(2) (T), but observed that the plasmid content of this species, from none to 2 plasmid forms, may depend on the culture passage history of the studied strain. We also demonstrated that R. felis does not cultivate in Vero cells at 37 degrees C but generates plaques at 30 degrees C. Finally, using a phylogenetic study based on 667 concatenated core genes, we demonstrated the position of R. felis within the spotted fever group. SIGNIFICANCE: We demonstrated that R. felis, which unambiguously belongs to the spotted fever group rickettsiae, may contain up to two plasmid forms but this plasmid content is unstable.

Indexed as

PlasmidsBase SequenceDNA PrimersPhylogenyPolymerase Chain ReactionRickettsia felisDNA Primers

Identifiers

PMID18509454
PMCPMC2384004
OpenAlexW1971761299

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.