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What causes chlamydia?

1-minute read

Chlamydia is caused by a bacteria called 'Chlamydia trachomatis'.

Chlamydia is a sexually transmitted infection (STI), which means that you get it through having unprotected vaginal, anal or oral sex with someone who has the infection.

You can help prevent being infected with chlamydia (and other sexually transmitted infections) by practicing safe sex. This means using a condom when you have vaginal or anal sex and using a condom or dental dam for oral sex.

Last reviewed: July 2017

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