SummaryRead the full fact sheet
- Chlamydia is a very common sexually transmissible infection.
- If left untreated, chlamydia can cause pelvic inflammatory disease in women, which can lead to chronic pain and infertility.
- In men, untreated chlamydia can cause pain and swelling in one or both testicles.
- If detected early, chlamydia may be treated with a single dose of antibiotics.
- Partners of people with chlamydia also need to be informed, tested and treated as they may be infected too. If so, there is a risk they could reinfect the person who has been treated for chlamydia.
On this page
- Who is at risk of chlamydia?
- What are the symptoms of chlamydia in women?
- What are the symptoms of chlamydia in men?
- How often should I get checked for chlamydia?
- How does chlamydia spread?
- How is chlamydia diagnosed?
- How is chlamydia treated?
- Letting partners know you have chlamydia
- Reducing chlamydia transmission
- Where to get help
Chlamydia is caused by the bacterium Chlamydia trachomatis and is a very common sexually transmissible infection (STI).
It is often called the ‘silent infection’ because most people do not realise they have it.
It can affect women and men of all ages, but most frequently occurs in young people (under 25) who regularly change sexual partners.
Chlamydia is spread by having unprotected sex of any kind with an infected person.
Who is at risk of chlamydia?
Anyone who is sexually active is at risk of chlamydia. You are at increased risk of infection if you:
- Are young (under 25).
- Often have different or multiple sexual partners.
- Have any type of unprotected sex (without condoms) with someone who is infected with chlamydia.
What are the symptoms of chlamydia in women?
Most women with chlamydia, have no signs or symptoms.
It can infect the cervix and spread to the uterus and fallopian tubes, causing:
- pelvic inflammatory disease (PID)
- chronic pelvic pain
- ectopic pregnancy
If a pregnant woman has chlamydia, it can pass on to her baby during childbirth – causing lung or eye infections.
In women (if symptoms are present), may include:
- unusual vaginal discharge
- burning feeling when urinating
- pain during sex
- bleeding or spotting between periods
- bleeding after sex
- lower abdominal pain.
What are the symptoms of chlamydia in men?
Men who have chlamydia usually do not have any signs or symptoms.
In men, chlamydia infects the urethra and may spread to the epididymis – the tube that carries sperm from the testicles.
In men (if symptoms are present), may include:
- discharge from the penis
- discomfort when urinating
- sore, swollen testes.
How often should I get checked for chlamydia?
Sexual health check-ups are recommended for anyone who is sexually active. Frequency of testing also depends on your STI risk:
- An annual sexual health check-up (which includes chlamydia testing) is highly recommended if you are sexually active – especially if you are under 25.
- Get checked more often during the year if you frequently change sexual partners.
- Remember, you are at greater risk if you have sex without a condom with 1 or multiple sexual partners.
How does chlamydia spread?
Chlamydia is spread when a person has unprotected sex (sex without a male or female condom or dental dam) with an infected person.
Because chlamydial infection often has no symptoms, many people do not realise they have the infection.
Even if you know a person well, you may not be able to tell they have an STI, because people can look healthy and still have chlamydia.
Remember, you can get chlamydia and other STIs from a new sexual partner who has in the past had sex with someone who is infected.
It can also be spread from a long-term partner who has had sex with other people.
How is chlamydia diagnosed?
Chlamydia is an easily diagnosed and curable STI.
Tests are painless and usually involve either:
- a simple urine test
- swab from the vagina, cervix, anus or penis.
The specimen is then sent to a laboratory for testing.
Getting your chlamydia test results
Test results are normally available within a week.
How is chlamydia treated?
If detected early, chlamydia can be treated with a single dose of antibiotic.
If complications from chlamydia infection are present – such as pelvic inflammatory disease (PID) in women – a longer course of antibiotics will be required.
Do not have sex for 7 days after you and your current partner have completed treatment. This includes all kinds of sex (vaginal, anal and oral) with or without a condom.
You can get reinfected with chlamydia if you have sex within the 7 days.
After you have completed treatment, have another test for chlamydia in 3 months’ time to make sure you have not been re-infected.
Can you get reinfected with chlamydia?
Chlamydia reinfection is common. Having chlamydia once does not stop you from getting it again.
Even after you’ve been successfully treated, you can still be reinfected if you have unprotected sex with someone who has the infection.
Letting partners know you have chlamydia
Sexual partners may be infected too. If you have chlamydia, anyone you have had sex with from the last 6 months needs to be informed, tested and treated.
If they don’t know, they could reinfect you or infect someone else if they are not treated. don’t receive treatment.
Most people will appreciate being told they may have an infection and it is an important step in preventing further infection in the community.
You do not have to do this alone. Your (GP) doctor, sexual health centre or the Department of Health Partner Notification Officers can help you through this process and ensure your identity is not revealed.
This publication outlines the role of Partner Notification Officers (PNOs) who work in the Office of the Chief Health Officer of the Department of Health:
You can also anonymously notify your sexual partners of the need to get tested and treated for chlamydia via the Let Them Know website if you feel unable to speak to them personally.
There are also nurses (called partner notification officers) who can help you anonymously notify your partners. They can be contacted on (03) 9096 3367.
How to help partners get treatment
If you are not sure whether your sexual partner(s) will seek treatment, ask your doctor for extra chlamydia medication (or a prescription). You can give it to them so they can be treated as soon as possible.
This is known as patient delivered partner therapy (PDPT) for chlamydia. Talk to your doctor to see if PDPT is right for you and your sexual partner(s).
Reducing chlamydia transmission
Safer sex practices reduce the risk of STI transmission. Ways to reduce your risk of catching chlamydia include:
- Practise safe sex – use condoms and water-based lubricant (lube) for all types of sex. Female, (or internal) condoms can also be used for vaginal or anal sex.
- If you are sexually active, get a full sexual health check (including tests for syphilis, HIV, gonorrhoea and chlamydia) at least once a year. Get checked more often if you frequently change sexual partners.
- After you have completed chlamydia treatment, get tested in 3 months’ time to check you have not been re-infected.
Where to get help
- Your GP (doctor)
- Your school nurse or school welfare coordinator
- Some secondary schools provide access to an adolescent health trained GP on site
- Your local community health service
- Sexual Health Victoria’s Clinics Tel. 1800 013 952 or (03)9660 4700 (also is youth friendly)
- Sexual Health Victoria Tel. 1800 013 952 or (03) 9257 0100
- Melbourne Sexual Health Centre Tel. (03) 9341 6200 or 1800 032 017 or TTY (for the hearing impaired) (03) 9347 8619
- Thorne Harbour Health (formerly Victorian AIDS Council) Tel. (03) 9865 6700 or 1800 134 840
- Ballarat Community Health Sexual Health Clinic Tel. (03) 5338 4500
- Bendigo Community Health Sexual Health Clinic Tel. (03) 5434 4300 Or (03) 5448 1600
- Gateway Health Clinic 35, Wodonga Tel. (02) 6022 8888 or 1800657 573
- Sunraysia Community Health Services Tel. (03) 5022 5444
- Barwon Health Sexual Health Clinic Tel. (03) 5226 7489
- Victorian Supercare Pharmacies
- Victorian Aboriginal Health Service Tel: (03) 9419 3000
- 1800MyOptions Tel:1800 696784 is a statewide phone service for information about sexual health as well as contraception and pregnancy options
- Chlamydia, 2017, Melbourne Sexual Health Centre
- Australian STI Management Guidelines, Australasian Sexual Health Alliance
- Sexually Transmissible Infections, RACGP
- Chlamydia, Sexual Health Victoria