Evidence map›Paper›PMID 42610699›Full record

Trial reportThe Journal of infectious diseases2026

Chlamydia trachomatis Incidence in Relation to Vaginal Microbiota Dynamics, Immunogenetics and Exposures in a Cohort of Young Student Women in France.

Jeanne Tamarelle, Bertille de Barbeyrac, Carla Balcon, Lindsay Rutt, Michael France, Cécile Bébéar, Antoine Bourret, Arnaud Fauconnier, Jacques Ravel, Elisabeth Delarocque-Astagneau and 2 more

Registry-linked trialAbstract readRandomized Controlled Trial
In one paragraph

Trial report in The Journal of infectious diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02904811 (Prevention of Diseases Induced by Chlamydia Trachomatis), which is not on this map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
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.

NCT02904811 nacompletednot on this map

Prevention of Diseases Induced by Chlamydia Trachomatis

TypeinterventionalSponsorAssistance Publique - Hôpitaux de ParisRan2017 to 2022Enrolled1,092ConditionsGenital Chlamydia Trachomatis InfectionArmsTesting for Ct infection immediately, Testing for Ct infection at the end of the study
3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

12 authors.

Jeanne TamarelleInstitut Pasteur, Epidemiology and Modelling of Antibiotic Evasion Unit, Paris, France.ORCID 0000-0003-0956-0349
Bertille de BarbeyracBordeaux University Hospital, Bacteriology Department, French National Reference Center for Bacterial STIs, Bordeaux, France.ORCID 0000-0003-4906-2651
Carla BalconBordeaux University Hospital, Bacteriology Department, French National Reference Center for Bacterial STIs, Bordeaux, France.
Lindsay RuttInstitute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA.ORCID 0009-0006-4132-5268
Michael FranceInstitute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA.ORCID 0000-0002-6029-0201
Cécile BébéarBordeaux University Hospital, Bacteriology Department, French National Reference Center for Bacterial STIs, Bordeaux, France.ORCID 0000-0001-6065-2332
Antoine BourretUniversité Paris-Cité, Faculté de Médecine, Paris, France.ORCID 0000-0002-9189-5713
Arnaud FauconnierUVSQ, RISCQ, Université Paris-Saclay, Montigny-le-Bretonneux, France.ORCID 0000-0003-0724-6831
Jacques RavelInstitute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA.ORCID 0000-0002-0851-2233
Elisabeth Delarocque-AstagneauUniversité Paris-Saclay, UVSQ, Inserm, CESP, Anti-infective Evasion and Pharmacoepidemiology Team, Montigny-le-Bretonneux, France.ORCID 0000-0002-5129-9300
Anne C M ThiébautUniversité Paris-Saclay, UVSQ, Inserm, CESP, High Dimensional Biostatistics for Drug Safety and Genomics Team, Villejuif, France.ORCID 0000-0003-2651-2795
i-Predict study group

Funding

The interaction between vaginal microbiota, immunogenetics and C. trachomatis susceptibilityR21AI130627 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI DELAROCQUE-ASTAGNEAU, ELISABETH, RAVEL, JACQUES · 2018 to 2019
$371k
French Ministry of Health PHRC-15-0063Institut de Recherche en Santé Publique A15012LSInstitut National du CancerNational Institute of Allergy and Infectious DiseasesNIAID NIH HHS R21 AI130627NIH HHS R21AI130627Région Ile-de-France
6 · The paper itself

Abstract

backgroundGiven the potential role of the vaginal microbiota in the acquisition of Chlamydia trachomatis infections, we aim to investigate its contribution together with immunogenetics and epidemiological exposures to the incidence of C. trachomatis in young women.

methodsThis study involved 313 female students aged 18-24 years from the i-Predict prevention trial in France. Participants provided 4 self-collected vaginal samples and filled 4 self-administered questionnaires every 6 months for 18 months. C. trachomatis-positive participants and negative controls with complete follow-up were selected for this analysis and submitted to chlamydia testing and to vaginal microbiota characterization using 16S rRNA amplicon sequencing. Thirteen human single nucleotide polymorphisms (SNPs) related to C. trachomatis susceptibility and severity were also assessed.

resultsCompared with 260 noninfected participants, Gardnerella spp., Fannyhessea vaginae and Prevotella timonensis were more abundant in C. trachomatis-incident participants (n = 24) before infection. Having a CST IV at the preceding sample compared with a CST I (OR 3.77, 95%CI [1.12-12.69], P = .033) was associated with increased risk of C. trachomatis acquisition, as well as having had multiple concomitant partners in the last 6 months (5.40 [2.10-13.92], P < .001). Lifetime condom use was associated with decreased incidence (0.38 [0.15-0.95], P = .039). None of the tested human SNPs was associated with C. trachomatis infection.

conclusionsIn this low-risk for C. trachomatis population, having a CST IV vaginal microbiota and associated bacterial anaerobes was a risk factor for C. trachomatis acquisition after adjustment for other exposures. Condom use remains one of the main tools to prevent incidence. Clinical Trials Registration.  ClinicalTrials.gov Identifier: NCT02904811. Registration date: 19 September 2016.

Indexed as

Chlamydia InfectionsChlamydia trachomatisMicrobiotaVaginaAdolescentCohort StudiesFemaleFranceHumansIncidencePolymorphism, Single NucleotideRNA, Ribosomal, 16SStudentsYoung AdultRNA, Ribosomal, 16Scommunity state typesC. trachomatisincidencenatural clearancesingle nucleotide polymorphisms

Identifiers

PMID42610699
PMCPMC13600437

What OpenQuestion holds

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Registered trials

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.