What is this test?
This direct stool test detects Helicobacter pylori antigen as evidence relevant to possible current infection. It is an antigen test, not a blood antibody test.
Why might it be ordered?
- For persistent upper gastrointestinal symptoms when H. pylori is a possible cause.
- To check eradication after treatment, but only at the appropriate time advised by a clinician or laboratory.
- As a non-invasive direct test when stool antigen testing has been selected.
What sample is needed?
Collect stool in a clean container. Follow instructions for amount and delivery, and do not mix it with urine, toilet water, or cleaning products.
How should you prepare?
Antibiotics, bismuth-containing medicines, and proton-pump inhibitors can affect the result. Do not stop them on your own; report everything taken and obtain exact timing advice.
How should you understand the result?
A positive result supports the presence of H. pylori antigen in the specimen. A negative result lowers the likelihood but can be misleading when timing or medicines interfere.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.