Evidence map›Paper›PMID 19460798›Full record

ArticleBMJ (Clinical research ed.)2009

Prevalence of disease related prion protein in anonymous tonsil specimens in Britain: cross sectional opportunistic survey.

Jonathan P Clewley, Carole M Kelly, Nick Andrews, Kelly Vogliqi, Gary Mallinson, Maria Kaisar, David A Hilton, James W Ironside, Philip Edwards, Linda M McCardle and 4 more

Open access · bronzeAbstract readMulticenter Study
In one paragraph

Article in BMJ (Clinical research ed.), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 1 pooled it
6.7field-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

32 citing papers in PubMed, 1 synthesis or guideline pooled it, 106 citations in OpenAlex.

  1. Pooled it
  2. Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz · 2025
    Article
  3. Article
  4. Review
  5. Non-human primates in prion diseases.Cell and tissue research · 2023
    Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Article
  12. Article
  13. Prion Diseases.Continuum (Minneapolis, Minn.) · 2015
    Review
  14. Genetics of Prion Disease in Cattle.Bioinformatics and biology insights · 2015
    Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors at 4 institutions in 2 countries.

Jonathan P ClewleyCentre for Infections, Health Protection Agency, London NW9 5EQ. jonathan.clewley@hpa.org.uk
Carole M Kelly
Nick Andrews
Kelly Vogliqi
Gary Mallinson
Maria Kaisar
David A Hilton
James W Ironside
Philip Edwards
Linda M McCardle
Diane L Ritchie
Reza Dabaghian
Helen E Ambrose
O Noel Gill
Health Protection Agency · MVBristol Institute for Transfusion Sciences · GBUniversity of Edinburgh · GBWestern General Hospital · GB

Funding

Department of HealthMedical Research Council G0600953Medical Research Council G0900580
6 · The paper itself

Abstract

objectiveTo establish with improved accuracy the prevalence of disease related prion protein (PrP(CJD)) in the population of Britain and thereby guide a proportionate public health response to limit the threat of healthcare associated transmission of variant Creutzfeldt-Jakob disease (vCJD).

designCross sectional opportunistic survey. Study samples Anonymised tonsil pairs removed at elective tonsillectomy throughout England and Scotland.

settingNational anonymous tissue archive for England and Scotland.

main outcome measurePresence of PrP(CJD) determined by using two enzyme immunoassays based on different analytical principles, with further investigation by immunohistochemistry or immunoblotting of any samples reactive in either assay.

resultsTesting of 63 007 samples was completed by the end of September 2008. Of these, 12 753 were from the birth cohort in which most vCJD cases have arisen (1961-85) and 19 908 were from the 1986-95 cohort that would have been also exposed to bovine spongiform encephalopathy through infected meat or meat products. None of the samples tested was unequivocally reactive in both enzyme immunoassays. Only two samples were reactive in one or other enzyme immunoassay and equivocal in the other, and nine samples were equivocally reactive in both enzyme immunoassays. Two hundred and seventy six samples were initially reactive in one or other enzyme immunoassay; the repeat reactivity rate was 15% or less, depending on the enzyme immunoassay and cut-off definition. None of the samples (including all the 276 initially reactive in enzyme immunoassay) that were investigated by immunohistochemistry or immunoblotting was positive for the presence of PrP(CJD).

conclusionsThe observed prevalence of PrP(CJD) in tonsils from the 1961-95 combined birth cohort was 0/32 661 with a 95% confidence interval of 0 to 113 per million. In the 1961-85 cohort, the prevalence of zero with a 95% confidence interval of 0 to 289 per million was lower than, but still consistent with, a previous survey of appendix tissue that showed a prevalence of 292 per million with a 95% confidence interval of 60 to 853 per million. Continuing to archive and test tonsil specimens, especially in older birth cohorts, and other complementary large scale anonymous tissue surveys, particularly of post-mortem tissues, will further refine the calculated prevalence of PrP(CJD).

Indexed as

Creutzfeldt-Jakob SyndromeCross-Sectional StudiesEnzyme-Linked Immunosorbent AssayHumansImmunohistochemistryPalatine TonsilPrevalencePrPSc ProteinsUnited KingdomPrPSc Proteins

Identifiers

PMID19460798
PMCPMC2685439
OpenAlexW2046090380

What OpenQuestion holds

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Registered trials

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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.