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What is Chlamydia?

Chlamydia is an infection caught by having sex with someone who has the infection (they may not know that they are carrying the infection).

Chlamydia is the most common bacterial sexually transmitted infection (STI).
It affects both men and women and is most common in young people under 25.
About 1 in 10 young people who have had sex who are tested have chlamydia, yet most people have no signs or symptoms and don’t know they have got it.

Just because you can’t see it…
….it doesn’t mean you haven’t got it…

Chlamydia is often called the ‘silent infection’ because most people do not have any symptoms or problems and feel perfectly well. The problem is that this ‘silent infection’ has the potential to do harm. 

If you are sexually active and under 25 you should be tested for chlamydia once a year.

The test for chlamydia is simple – just one quick and painless test that you do yourself. You do NOT need to be examined!

Further chlamydia information:

You can get tested at any contraception & sexual health clinic or at your GP practice or via

Full list of clinics and location maps »

Chlamydia Screening
Most people who are infected with HIV have a long period when they look and feel quite well. Many people do not even know they are infected.