Chlamydia is the most common sexually transmitted infection (STI) in Waterloo Region. Almost 70% of all cases in Waterloo Region are young adults between the age of 15 and 24.

What is Chlamydia?

Chlamydia is a serious bacterial disease, especially for women, if not treated early. It may cause a vaginal discharge or pain when passing urine. Men can get infection of the urinary tract. Most women and some men have no symptoms of the disease.

Chlamydia is curable.
Protect yourself! Use condoms! Get tested!

For free condoms and testing information, call: 519-883-2267.

How does it spread?

The disease spreads by direct contact, usually sexual, with an infected person. You can infect another sex partner as soon as you get Chlamydia.

A pregnant woman can also pass on the infection to her baby as it is being born. This can lead to infection of the eyes and lungs in the infant.

It is important to inform people you have had sex with in the past two months because they may have the disease and not know they need treatment.

Your public health nurse will contact your partner(s) if you prefer. Your name will be kept confidential.


In women, chlamydia can cause a serious infection of the uterus and tubes (pelvis inflammatory disease). It can lead to sterility and ectopic or tubal pregnancy. Early treatment can protect against these problems.


Chlamydia can be treated with antibiotics, usually azithromycin or doxycycline. It is important that you take the pills as directed. The disease may not be cured until all the pills are taken. Azithromycin treatment consists of four pills taken all at one time. Do not drink alcohol when taking antibiotics. The treatment with antibiotics is usually successful, but it is important for you to return for rescreening in 3-6 months (to make sure the infection has been cured) or sooner if symptoms develop again.

You can restart sexual activity only after you and your sex partner(s) have finished treatment, and waited seven days.


  • Take medicine as directed until it is finished.
  • Wait seven days before having sex again.
  • Avoid alcohol when taking antibiotics; also avoid milk and dairy products if taking doxycycline.
  • Return for check-up visits as your doctor or clinic requests.
  • Tell people you have had sex with in the past two months.
  • Use condoms to lower the chance of infections in the future.

If you are still worried or have more questions call 519-883-2267.