Evidence map›Paper›PMID 28129328›Full record

ArticlePloS one2017

Chlamydia trachomatis Pgp3 Antibody Population Seroprevalence before and during an Era of Widespread Opportunistic Chlamydia Screening in England (1994-2012).

Sarah C Woodhall, Gillian S Wills, Patrick J Horner, Rachel Craig, Jennifer S Mindell, Gary Murphy, Myra O McClure, Kate Soldan, Anthony Nardone, Anne M Johnson

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. 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
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

29 citing papers in PubMed, 43 citations in OpenAlex.

  1. Trial
  2. UnveilingiScience · 2025
    Article
  3. Article
  4. Current Evidence of Maternal Infection With Chlamydia trachomatis and Preeclampsia Risk.American journal of reproductive immunology (New York, N.Y. : 1989) · 2025
    Review
  5. Article
  6. Article
  7. Review
  8. Trends inSexually transmitted infections · 2024
    Article
  9. The serodiagnositic value ofFrontiers in public health · 2024
    Article
  10. Article
  11. Microorganisms · 2023
    Review
  12. Plasmid-mediated virulence inFrontiers in cellular and infection microbiology · 2023
    Review
  13. Article
  14. Seroprevalence of Chlamydia trachomatis Among Female Adults in the United States: The National Health and Nutrition Examination Surveys.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2021
    Article
  15. Molecular Epidemiology of Human Papillomaviruses,Tropical medicine and infectious disease · 2021
    Article
  16. Seroepidemiology ofFrontiers in microbiology · 2021
    Article
  17. Article
  18. Article
  19. Article
  20. Relation betweenSexually transmitted infections · 2019
    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

10 authors at 5 institutions in 1 country.

Sarah C WoodhallNational Infection Service, Public Health England, London, United Kingdom.ORCID 0000-0001-7896-3526
Gillian S WillsJefferiss Research Trust Laboratories, Faculty of Medicine, Imperial College London, St Mary's Campus, London, United Kingdom.
Patrick J HornerSchool of Social and Community Medicine, University of Bristol, Bristol, United Kingdom.
Rachel CraigNatCen Social Research, London, United Kingdom.
Jennifer S MindellResearch Department of Epidemiology and Public Health, UCL, London, United Kingdom.
Gary MurphyNational Infection Service, Public Health England, London, United Kingdom.
Myra O McClureJefferiss Research Trust Laboratories, Faculty of Medicine, Imperial College London, St Mary's Campus, London, United Kingdom.
Kate SoldanNational Infection Service, Public Health England, London, United Kingdom.
Anthony NardoneNational Infection Service, Public Health England, London, United Kingdom.
Anne M JohnsonResearch Department of Infection and Population Health, UCL, London, United Kingdom.
Public Health England · GBImperial College London · GBUniversity College London · GBNatCen Social Research · GBUniversity of Bristol · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundOpportunistic chlamydia screening of <25 year-olds was nationally-implemented in England in 2008 but its impact on chlamydia transmission is poorly understood. We undertook a population-based seroprevalence study to explore the impact of screening on cumulative incidence of chlamydia, as measured by C.trachomatis-specific antibody.

methodsAnonymised sera from participants in the nationally-representative Health Surveys for England (HSE) were tested for C.trachomatis antibodies using two novel Pgp3 enzyme-linked immunosorbent assays (ELISAs) as a marker of past infection. Determinants of being seropositive were explored using logistic regression among 16-44 year-old women and men in 2010 and 2012 (years when sexual behaviour questions were included in the survey) (n = 1,402 women; 1,119 men). Seroprevalence trends among 16-24 year-old women (n = 3,361) were investigated over ten time points from 1994-2012.

resultsIn HSE2010/2012, Pgp3 seroprevalence among 16-44 year-olds was 24.4% (95%CI 22.0-27.1) in women and 13.9% (11.8-16.2) in men. Seroprevalence increased with age (up to 33.5% [27.5-40.2] in 30-34 year-old women, 18.7% [13.4-25.6] in 35-39 year-old men); years since first sex; number of lifetime sexual partners; and younger age at first sex. 76.7% of seropositive 16-24 year-olds had never been diagnosed with chlamydia. Among 16-24 year-old women, a non-significant decline in seroprevalence was observed from 2008-2012 (prevalence ratio per year: 0.94 [0.84-1.05]).

conclusionOur application of Pgp3 ELISAs demonstrates a high lifetime risk of chlamydia infection among women and a large proportion of undiagnosed infections. A decrease in age-specific cumulative incidence following national implementation of opportunistic chlamydia screening has not yet been demonstrated. We propose these assays be used to assess impact of chlamydia control programmes.

Indexed as

AdolescentAdultAge FactorsAntibodies, BacterialAntigens, BacterialBacterial ProteinsChlamydia InfectionsChlamydia trachomatisEnglandEnzyme-Linked Immunosorbent AssayFemaleHumansMaleOpportunistic InfectionsRisk FactorsSeroepidemiologic StudiesAntibodies, BacterialAntigens, BacterialBacterial Proteinspgp3 protein, Chlamydia

Identifiers

PMID28129328
PMCPMC5271337
OpenAlexW2580187317

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.