STI Testing: How It Works

STI testing is one of the most common health checks people put off — usually because they're not sure what's involved, or they'd rather not talk about it face to face. The reality? Testing is quick, mostly painless, and far easier than most people imagine — especially now you can start the whole process online.

Here's exactly how STI testing works in Australia: which tests you might need, when to get tested, and how a confidential telehealth consultation gets you sorted.

What Is STI Testing?

STI (sexually transmissible infection) testing checks whether you've picked up infections like chlamydia, gonorrhoea, syphilis, HIV, Mycoplasma genitalium, trichomonas, hepatitis B and C, or others. Many STIs cause no symptoms at all — which is why regular testing is recommended for anyone sexually active with new or multiple partners, not just people who feel sick.

Australian guidelines generally recommend sexual health checks at least annually for sexually active people under 30, and after any new sexual contact.

How STI Testing Works: Step by Step

1. Talk to a doctor: A GP works out which tests make sense for you based on your sexual history, symptoms and last test date. This can be done by online GP consultation — discreet, by phone or video, from home.
2. Get a pathology referral: The doctor sends a pathology referral (from $25) to your email — valid at any Australian pathology collection centre like Laverty, 4Cyte, Clinical Labs or Melbourne Pathology.
3. Visit a collection centre: Walk in, provide your urine sample and/or blood draw. No appointment needed at most centres, and it takes a few minutes.
4. Get your results and treatment: Results go back to your doctor, who contacts you with the outcome. If something comes back positive, treatment is usually simple — most bacterial STIs are cured with antibiotics, which can be prescribed as an eScript after an online prescription consult.

Which Tests Will You Need?

There's no single "STI test" — the right combination depends on your exposure and anatomy:

• Chlamydia & gonorrhoea: urine test and/or swabs from any exposed sites (throat, rectum, cervix)
• HIV & syphilis: blood test — recommended in most standard sexual health checks
• Hepatitis B & C: blood test, particularly if you have risk factors
• Trichomonas & Mycoplasma genitalium: urine or swab PCR testing when indicated
• Herpes (HSV): swab of an active sore — blood antibody tests are less useful and not routinely recommended

When Should You Get Tested?

Timing matters because of "window periods" — the gap between infection and when a test can reliably detect it:

• Chlamydia & gonorrhoea: detectable within 1–2 weeks of exposure
• Syphilis: around 2–4 weeks
• HIV: modern 4th-generation tests detect most infections by 2–6 weeks
• No symptoms? Routine annual testing is still recommended if you're sexually active with new or multiple partners

If you've had a specific recent exposure, a doctor can advise whether to test now or re-test after the window period — and in some cases whether preventive treatment (like PEP for HIV) is needed urgently.

What If a Test Comes Back Positive?

It's more common than you'd think, and most STIs are very treatable:

• Bacterial STIs (chlamydia, gonorrhoea, syphilis) are cured with antibiotics — often a single dose or short course
• Viral STIs (herpes, HIV) can't be cured but are highly manageable with modern treatment — people with HIV on effective treatment live normal, healthy lives and can't transmit it sexually (U=U)
• Your doctor will explain treatment, partner notification and re-testing — all handled confidentially through telehealth if you prefer

Why Test Through Telehealth?

• Privacy: consult by phone from anywhere — no waiting rooms, no awkward small talk
• Speed: same-day appointments and an emailed pathology referral, valid at collection centres nationwide
• Follow-up: results discussion and prescriptions handled by the same doctor

For judgment-free sexual health care, see also our guides to men's health and women's health.