Vaginal Microbiome Test Australia

The vaginal microbiome test profiles the balance of bacteria and yeast in the vagina using a vaginal swab. The kit is posted to you and you collect it at home, or you can collect at an accredited centre instead (options below). It is for women with recurrent thrush, bacterial vaginosis, discharge or discomfort that standard treatment has not settled. It costs $249 with your own doctor's request, or $329 with a KnowLuna doctor who requests it and explains the results in a 20-minute video consult.

What it measures

Lactobacillus speciesBacterial vaginosis organismsCandida speciesAerobic vaginitis organisms

Lactobacillus species: the protective bacteria that keep the vagina acidic. Most women are dominated by one or two of them, though a sizeable minority with no symptoms have a mixed community instead. The report shows which are present and how much.
Bacterial vaginosis organisms: the mixed anaerobic bacteria (such as Gardnerella) that take over when lactobacilli fall, raising pH and causing the thin discharge and odour of BV.
Candida species: the yeasts behind thrush. The test identifies which species is present, which matters because some are less responsive to the usual approaches.
Aerobic vaginitis organisms: gut and skin bacteria that can cause a different kind of inflammation from BV. They also live harmlessly in many women, so a raised result is a clue for the doctor rather than a diagnosis, which rests on microscopy and examination.

Who it's for

Women aged 18 and over with thrush, BV, discharge, odour, itch or irritation that keeps returning, or that has not responded to treatment prescribed on the basis of symptoms alone. It also suits women who have had several standard swabs come back "normal" or "mixed flora" while symptoms continue. It is not a test for infections passed between partners; those are outside what KnowLuna offers and are arranged separately by your GP or a sexual health clinic. Where symptoms are new, a doctor may want to exclude other infections through their own testing first, because several other causes produce very similar discharge, odour and irritation.

Microbiome test vs high vaginal swab

A high vaginal swab, the standard test your GP orders, is cultured and examined under the microscope in the lab. Microscopy is how BV is identified, culture grows candida and a few named bacteria, and the rest is often described as "mixed flora" or "normal flora". It is quick and useful for a first episode, and culture is also what allows a laboratory to test which treatments a yeast responds to.

A microbiome test uses molecular methods to identify organisms by their DNA, including the anaerobic bacteria that do not grow in routine culture. It reports which lactobacillus species are present and in what proportion, quantifies BV-associated organisms, identifies the candida species, and flags aerobic organisms. The result is a profile of the whole community rather than a list of what happened to grow. It can add information when symptoms keep returning and standard swabs have not explained them, and it complements culture and microscopy rather than replacing them. For a straightforward first infection it is unnecessary.

What you'll learn, and what you won't

You will learn whether your vagina is dominated by protective lactobacilli or by BV-type organisms, whether candida is present and which species, whether aerobic bacteria are contributing, and how your profile compares with the patterns seen in women with and without symptoms. The doctor explains what that means for the symptoms you have been having.

What the test cannot do is tell you why the balance shifted, or fix it. Hormone changes, antibiotics, hygiene products, sex and cycle timing all influence the microbiome, and the result is one snapshot. It does not test for infections passed between partners, it cannot show which treatments a yeast responds to (that needs a culture), and it does not replace an examination if you have pain, bleeding or fever. A laboratory test is one input to a doctor's assessment, not a diagnosis on its own. If anything needs prompt attention, a doctor contacts you directly.

Reference ranges and what they mean

Marker	What a typical result shows	What it usually means
Lactobacillus species	Dominant (the majority of organisms detected)	Lactobacillus-dominant profiles are associated with a normal vaginal pH of about 3.8 to 4.5 and fewer recurrent symptoms.
Bacterial vaginosis organisms	Absent or low	High levels with low lactobacilli fit the BV pattern, usually with a pH above 4.5.
Candida species	Not detected, or low	Candida can be present without symptoms. Species matters: the doctor notes whether it is the common species or a less typical one.
Aerobic vaginitis organisms	Absent or low	Raised levels can be a clue to aerobic vaginitis, which is managed differently from BV. These bacteria are also present harmlessly in many women, so the doctor reads the result with your symptoms and an examination.

Reporting formats vary by laboratory; your report shows the categories and thresholds your lab uses.

How the sample is collected

The sample is a vaginal swab you collect yourself. The default is a home kit posted to you with written instructions and a prepaid return satchel: insert the swab a few centimetres, rotate for about ten seconds, and place it in the tube. If you would rather collect at an accredited centre, you can do that in a private room there, with a collector available if you would prefer help. Either way it takes a couple of minutes and is not painful, and the swab is analysed by a NATA/RCPA-accredited laboratory.

Avoid collecting during your period, and try not to use vaginal creams, douches or lubricants, or have sex, in the 24 hours before. If you have recently finished a course of antibiotics or antifungal treatment, waiting a couple of weeks gives a truer picture of your baseline, unless your doctor wants the test done sooner.

What the result leads to

Your report and a plain-English explanation appear in your account. If you chose the doctor option, the KnowLuna women's health doctor talks you through the profile in your consult, explains how it relates to your symptoms, and outlines the sensible next steps. That may be a discussion with your own GP, a referral, or simply the reassurance of knowing what is and is not there. Decisions about any treatment sit with the doctor who cares for you, informed by the result rather than a guess.

When to do this test

Cycle timing: not during your period. Mid-cycle or the week before a period suits most women.
Before collecting: no vaginal products, douching or sex for 24 hours.
After treatment: ideally two weeks or more after finishing antibiotics or antifungals, so the test shows your baseline rather than the treatment.
Fasting: not relevant. There is no blood draw.

How it works

Order online. Either upload the request your own doctor has signed, or a KnowLuna women's health doctor reviews your questionnaire and requests the test.
Collect the swab at home from the kit we post you, or in private at an accredited (NATA) collection centre near you with help available if you want it (options below).
Results are usually ready within about a week, explained in your account, with the doctor consult to talk them through if you chose that option.

Choose how you collect

Every option is the same accredited test and the same report. Pick what suits you at checkout; the fee, if any, is added to either pathway price.

Home kit, swab or salivaIncluded

The kit is posted to you with instructions and a prepaid return satchel. No blood, no appointment. Included.

Collection centreIncluded

A quick draw at an accredited pathology collection centre near you. Usually under ten minutes. Included.

Check collection near you

Accredited collection centres operate in every state and territory. We show you the closest ones the moment your test is requested.

Common questions

What is the difference between a vaginal microbiome test and a swab?

A standard high vaginal swab is cultured, so it reports the organisms that grow readily and often labels the rest "mixed flora". A microbiome test identifies organisms by their DNA, including the anaerobes that culture does not report individually, and gives the proportions of protective and problem species. It adds detail when symptoms keep returning, alongside culture and microscopy rather than instead of them.

What is a normal vaginal pH?

About 3.8 to 4.5, which is mildly acidic. Lactobacilli keep it there by producing lactic acid. A pH above 4.5 is typical of bacterial vaginosis, while thrush usually leaves pH in the normal range. This test does not measure pH directly, but a lactobacillus-dominant profile and a normal pH go together.

How is the sample collected?

By a vaginal swab you take yourself, either at home from the kit we post you or in a private room at an accredited collection centre, where a collector can help if you want. It takes a couple of minutes. Avoid your period, and avoid vaginal products, douching and sex for 24 hours beforehand so the result reflects your usual microbiome.

Can the test tell me why my thrush keeps coming back?

It can show whether candida is present, which species it is, and whether your protective lactobacilli are low, or BV-associated or aerobic organisms are present alongside. That often explains why symptom-based treatment has not held. The doctor puts the profile together with your history to work out the likely reasons.

Will the result mean I need treatment?

Not necessarily. Some organisms are present without causing harm, and the doctor interprets the profile against your symptoms. If something does need addressing, the report gives your treating doctor specific information to work from rather than guesswork. KnowLuna explains the result and outlines options; treatment decisions sit with the doctor who cares for you.

Sources and further reading

General information only, not medical advice. A test result is one input to a doctor's assessment, not a diagnosis on its own, and every abnormal result is followed up by a KnowLuna doctor. If your symptoms are severe or sudden, see a doctor promptly. Read our medical disclaimer.

Cycles and hormones tests: the stage hub.
Female hormone panel: oestrogen levels influence the vaginal microbiome.
Vaginal microbiome test: what it checks, when it helps and how it differs from a swab
Female hormone imbalance: symptoms, and the blood tests that check them

Vaginal microbiome test