Prevention & support for sexual health



Chlamydia (chlamydia trachomatis)



What is Chlamydia ?

Chlamydia is a sexually transmitted infection caused by bacteria. It is very widespread, particularly among adolescents and young adults.

How do you get Chlamydia ?

  • From sexual relations with penetration of the penis in the vagina or anus;
  • From oral sex;
  • When sex toys are shared;
  • An infected pregnant person can transmit the bacteria to her baby during delivery.

What are the symtoms of Chlamydia ?

Often, there are no symptoms.

Here are some possible symptoms that may arise 2 to 5 weeks after an incidence of at-risk sexual behaviour:

Person with vagina Person with penis
  • new or different vaginal discharge
  • painful burning during urination
  • pain in the lower abdomen, sometimes accompanied by fever and chills
  • pain during intercourse
  • bleeding between periods
  • bleeding after intercourse
  • discharge from the penis, usually clear or milky-white
  • itching around the opening of the penis
  • painful burning during urination
  • painful or swollen testicles

Symptoms may disappear even though the infection is still present.


What is the treatment for Chlamydia ?

Treatment of this infection is done by taking antibiotics prescribed in a single dose or for a period of seven days, depending on the antibiotic prescribed. In the case of single-dose treatment, you should consider yourself contagious for a period of seven days after treatment. Thus, condom use is recommended during the duration of treatment. It is important that sexual partners are also treated even if they have no symptoms. Treatment is free

Additional information

Reporting of Chlamydia is compulsory. Public health professionals who diagnose Chlamydia must inform the Public Health Department of their region.

People who have Chlamydia must inform everyone with whom they have had sexual relations during the 6 weeks prior to the appearance of their symptoms. If the person with Chlamydia is asymptomatic, sexual partners from even earlier should also be informed.

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