Chlamydia is caused by a bacteria. It is transmitted when the bacteria comes into contact with the mucous membranes of the penis, vagina, mouth or anus.
The danger in chlamydia lies in the fact that many people don't get any symptoms. This way, they can pass it on to others without them realizing it. Chlamydia can be treated well with antibiotics.
Chlamydia mainly occurs in young adults. 20% of people with an infection are younger than 24 years old. The at risk group for a chlamydia infection are people who have sex without a condom with various bed partners, men who have sex with men, sex workers and visitors to sex workers. If your bed partner belongs to one of these groups, you also have a higher chance of getting a chlamydia infection.