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Helicobacter pylori stool antigen test (qualitative)

Published: August 9, 2026Updated: August 16, 2026

This test detects the presence of *Helicobacter pylori* bacteria in your stool using a simple, non-invasive method. It helps determine if you have an infection caused by this common stomach bacteria.

Quick summary

["A quick way to check for stomach infection without needing a blood test or endoscopy."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
87952-8
Short code
H pylori Stl Ql Cult
Synonyms
H pylori Stl Ql Cult
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
organism-specific-culture
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Why This Test Matters

Helicobacter pylori is a bacteria that can live in your stomach and sometimes intestines. If left untreated, it may lead to stomach ulcers, chronic gastritis, or even certain types of stomach cancer. This test helps identify if you have an active infection, which can guide treatment decisions.

How the Test Works

The test involves collecting a small sample of your stool (feces) and analyzing it for specific proteins or antigens produced by *H. pylori*. The result is either positive (indicating infection) or negative (no infection detected).

Sample Collection

You’ll need to collect a stool sample at home using a provided kit. The sample is then sent to a lab for testing. Follow the instructions carefully to ensure accurate results.

What to Expect After Testing

If your test is positive, your doctor may recommend treatment with antibiotics and acid-reducing medications to eliminate the bacteria. If negative, further testing (like an endoscopy) may be needed to rule out other conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

H. pylori stool antigen test

Frequently asked questions

What does a positive result mean?
A positive result means your stool contains proteins from *Helicobacter pylori*, confirming an active infection. This requires medical treatment to clear the bacteria and reduce the risk of complications like ulcers or long-term stomach damage.
What if my test is negative?
A negative result means no detectable *H. pylori* proteins in your stool, but it doesn’t rule out past infection. If symptoms persist, your doctor may recommend additional tests, such as an endoscopy or breath test, to investigate further.
How long does it take to get results?
Results are typically available within 24 to 48 hours after the sample is submitted to the lab. Follow-up with your healthcare provider if you have questions about your results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy