H. Pylori Test in Australia
An H. pylori test detects Helicobacter pylori, a bacterium that colonises the stomach lining and is the leading cause of peptic ulcer disease worldwide — detected either as an active infection (urea breath or stool antigen test) or as past exposure (serology).
What this test measures
The presence of Helicobacter pylori infection, by urea breath test, stool antigen test or serum antibody testing.
- No GP referral needed to arrange testing.
- Collection at accredited (NATA / ISO 15189) pathology centres Australia-wide.
- Active infection is confirmed by urea breath or stool antigen testing, not by blood antibodies.
- Treatment is prescription-only — a positive result must be taken to your GP.
FORM Australia is in pre-sale — join the waitlist for h. pylori test.
We're onboarding Australian customers in batches while we finalise our accredited-lab partnership. Join the waitlist and we'll email you as soon as ordering opens. Prices shown across the Australian site are indicative and final at launch.
What an H. pylori test is
Helicobacter pylori is a spiral bacterium that survives in the acidic stomach by producing urease, and testing detects either the organism's activity, its antigens, or the antibody response to it.
The urea breath test exploits that urease enzyme directly. You swallow urea labelled with a non-radioactive carbon isotope; if H. pylori is present, its urease splits the urea and labelled carbon dioxide appears in your breath within minutes. It is highly sensitive and specific for active infection and is the preferred non-invasive test in Australian practice.
The stool antigen test detects H. pylori proteins shed in faeces. It also identifies active infection with good accuracy and is often preferred for children or where breath testing is impractical.
Serology detects IgG antibodies in blood. Antibodies persist for months to years after the organism has been cleared, so a positive serology cannot distinguish current infection from past exposure. That is a critical limitation: serology is not recommended for confirming active infection, and is never used to confirm eradication after treatment.
| Method | Sample | Detects | Best used for |
|---|---|---|---|
| Urea breath test | Exhaled breath | Active infection | First-line diagnosis and confirming eradication |
| Stool antigen test | Faeces | Active infection | Diagnosis and eradication confirmation; children |
| Serology (IgG) | Blood | Current or past exposure | Epidemiology; limited clinical use |
| Gastric biopsy / rapid urease | Endoscopic biopsy | Active infection | When endoscopy is indicated for other reasons |
Why H. pylori testing is performed
Testing is performed to find a treatable cause of dyspepsia and peptic ulcer disease, and because H. pylori is a recognised risk factor for gastric cancer.
H. pylori infects a large share of the global population, with prevalence in Australia lower than the global average but considerably higher in people born overseas in high-prevalence regions and in some Aboriginal and Torres Strait Islander communities. Most people carry it without symptoms.
Where it matters, it matters a great deal. H. pylori is the dominant cause of duodenal and gastric ulcers not attributable to non-steroidal anti-inflammatory drugs, and the International Agency for Research on Cancer classifies it as a Group 1 carcinogen for gastric cancer. It is also associated with gastric MALT lymphoma, which can regress after eradication, and with unexplained iron deficiency anaemia and immune thrombocytopenia.
Australian practice for uninvestigated dyspepsia in younger patients without alarm features is 'test and treat': confirm infection non-invasively and, if positive, treat — reserving endoscopy for older patients or anyone with alarm features such as bleeding, anaemia, weight loss, vomiting or difficulty swallowing.
What a positive H. pylori result can indicate
A positive urea breath or stool antigen test indicates active Helicobacter pylori infection of the stomach lining.
Active infection means chronic gastritis is almost certainly present, whether or not you have symptoms, and it substantially raises the likelihood that any peptic ulcer you have is caused by the organism rather than by anti-inflammatory medication.
Australian guidelines support eradication in anyone with confirmed infection plus peptic ulcer disease, gastric MALT lymphoma, a family history of gastric cancer, unexplained iron deficiency anaemia, or ongoing dyspepsia. Eradication uses a combination of prescription antibiotics and acid suppression, chosen by a doctor according to local resistance patterns and your medication history.
This is prescription-medicine territory. FORM does not prescribe, recommend or supply eradication therapy — a positive result should be taken to your GP, who will decide whether and how to treat. Confirmation of successful eradication is done at least four weeks after finishing antibiotics, using a breath or stool test, never serology.
What a negative H. pylori result can indicate
A negative urea breath or stool antigen test makes active infection unlikely, provided you were not taking medicines that suppress the organism at the time of testing.
The most common cause of a false negative is medication. Proton pump inhibitors suppress H. pylori enough to produce a negative result while the infection persists, which is why they should be stopped for two weeks beforehand where clinically safe. Antibiotics and bismuth compounds have the same effect and require four weeks. Recent upper gastrointestinal bleeding can also suppress detection.
A genuine negative in someone with ongoing dyspepsia shifts attention to other causes: functional dyspepsia, gastro-oesophageal reflux disease, medication effects — particularly non-steroidal anti-inflammatory drugs — gallbladder disease, coeliac disease, or, less commonly, malignancy.
If your symptoms persist despite a negative result, see your GP. A negative test rules out one cause; it does not explain the symptom.
How results are reported in Australia
Australian laboratories report H. pylori breath and stool antigen tests as a qualitative positive or negative, and serology as an antibody level against a laboratory-specific cut-off.
| Test | Result | Interpretation |
|---|---|---|
| Urea breath test | Positive | Active infection — see your GP |
| Urea breath test | Negative | Active infection unlikely (if off PPIs and antibiotics) |
| Stool antigen | Positive | Active infection — see your GP |
| Stool antigen | Negative | Active infection unlikely |
| Serology IgG | Positive | Current or past exposure — cannot confirm active infection |
| Serology IgG | Negative | Infection unlikely, but less reliable than breath or stool testing |
Who should consider an H. pylori test
Testing is indicated for people with persistent indigestion, a history of peptic ulcer, unexplained iron deficiency, or a family history of gastric cancer.
See your GP urgently rather than testing first if you have vomiting of blood, black tarry stools, difficulty swallowing, persistent vomiting, or unintentional weight loss.
- Persistent indigestion, upper abdominal pain, bloating or nausea.
- A previous peptic ulcer that was never tested for H. pylori.
- Unexplained iron deficiency anaemia after other causes have been considered.
- A first-degree relative with gastric cancer.
- Long-term non-steroidal anti-inflammatory or aspirin use with dyspepsia.
- Confirming eradication at least four weeks after completing prescribed treatment.
How H. pylori testing works with FORM in Australia
FORM issues the accredited-lab request, you attend a collection centre, and the written report explains the result and what to raise with your GP.
FORM is a diagnostic testing service. We do not prescribe or supply antibiotics, acid-suppressing medicines or eradication therapy of any kind.
- Order online — no GP referral required.
- Check your medications: no proton pump inhibitors for two weeks, no antibiotics or bismuth for four weeks, and only with your doctor's agreement.
- Attend a NATA-accredited (ISO 15189) collection centre; fast for at least six hours before a breath test.
- Receive a written, plain-English report.
- If positive, take the report to your GP — eradication therapy is prescription-only.
Frequently asked questions
- Do I need a GP referral for an H. pylori test in Australia?
- No. You can order the test directly and we issue the pathology request form. Because the request does not come from your treating doctor under a Medicare-eligible pathway, no Medicare rebate applies.
- Which H. pylori test is most accurate?
- The urea breath test and the stool antigen test are both highly accurate for active infection and are the tests Australian guidelines prefer. Blood antibody testing cannot distinguish current from past infection and is not used to confirm eradication.
- Do I need to stop my reflux medication before testing?
- Proton pump inhibitors should be stopped for two weeks before a breath or stool test, and antibiotics or bismuth for four weeks, because they suppress the bacteria and can cause a false negative. Never stop a prescribed medicine without asking your doctor first.
- Can H. pylori be treated?
- Yes — eradication uses a combination of prescription antibiotics and acid suppression, decided and prescribed by a doctor. FORM does not prescribe or supply treatment. Take a positive result to your GP.
- How do I know the infection is gone?
- By repeating a urea breath test or stool antigen test at least four weeks after finishing antibiotics and at least two weeks after stopping proton pump inhibitors. Serology stays positive for a long time after clearance and cannot be used for this.
- Does H. pylori cause stomach cancer?
- H. pylori is classified by the International Agency for Research on Cancer as a Group 1 carcinogen for gastric cancer, and infection raises the risk. The great majority of infected people never develop gastric cancer. Risk assessment and any decision to treat belong with your doctor.
References
- [1]RCPA Manual — pathology test reference intervalsRoyal College of Pathologists of Australasia
- [2]Lab Tests Online AU — patient test informationAustralasian Association for Clinical Biochemistry and Laboratory Medicine
- [3]Helicobacter pylori infection — testing and managementTherapeutic Guidelines / Australian Prescriber
FORM Australia is in pre-sale — join the waitlist for h. pylori test.
We're onboarding Australian customers in batches while we finalise our accredited-lab partnership. Join the waitlist and we'll email you as soon as ordering opens. Prices shown across the Australian site are indicative and final at launch.
Other Australian tests
This page is general information about pathology testing, not medical advice, and does not replace consultation with a registered health practitioner. Discuss any result with your GP or a registered doctor. FORM provides diagnostic testing and interpretation only — we do not diagnose, prescribe medicines or provide treatment.