Chlamydiae

Chlamydia

Chlamydia is a sexually transmitted infection caused by the bacterium Chlamydia trachomatis. The best ways to prevent transmission are to use condoms and get tested.

Our missions

  • Monitoring the epidemiological trends of Chlamydia

  • Describe the clinical, biological, and behavioral characteristics of affected individuals

  • Implement preventive measures tailored to the most at-risk populations

  • Informing the general public

  • Issue alerts in the event of an increase in the number of cases and/or clusters of cases diagnosed in the same location

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In brief

Videos, infographics, key statistics, expert interviews… Find the latest news and key information on chlamydia here

Journée mondiale du sida, 1er décembre

news

World AIDS Day 2025: Promoting Prevention to Combat the Transmission of HIV and ...

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15 %

an increase in the number of people diagnosed and treated for Chlamydia trachomatis infection in the private sector between 2022 and 2024

56 %

Diagnoses made in the private sector in 2024 involve men

96 %

cases of venereal lymphogranulomatosis are diagnosed in cisgender men

In relation to

Gonococcie

Gonorrhea

thematic dossier

On the rise between 2022 and 2024, and more common among men (particularly those aged 26–49) and young people, gonorrhea is a sexually transmitted infection caused by the gonococcus bacterium....

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Syphilis

Syphilis

thematic dossier

Caused by the bacterium Treponema pallidum, syphilis is sexually transmitted. It can also be transmitted from mother to child during pregnancy. This disease can affect all organs and have serious...

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Sexual health

thematic dossier

Santé publique France focuses in particular on four areas of sexual health: sexually transmitted infections, including HIV; contraception; combating discrimination; and violence.

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