Helicobacter pylori Antigen, EIA, Stool
Also known as: H. pylori Antigen, Campylobacter pylori Antigen, H. pylori Stool Antigen
Use
Used to detect active infection with Helicobacter pylori by identifying bacterial antigen in stool specimens. It serves diagnostic purposes and is also used to confirm eradication post-treatment. ([intellitestmanager.questdiagnostics.com](https://intellitestmanager.questdiagnostics.com/home/output/223566?utm_source=openai))
Special Instructions
No fasting or special patient preparation required for specimen collection. However, recent use of proton pump inhibitors, bismuth, or antibiotics may lead to false-negative results, and retesting is recommended after two weeks off these agents. Confirmation of eradication should be performed at least four weeks following treatment completion. ([jdos.nicholsinstitute.com](https://jdos.nicholsinstitute.com/dos/Medfusion/test/690819?utm_source=openai))
Limitations
Recent use of PPIs, antimicrobials, or bismuth can suppress bacterial antigen levels, yielding false-negative results. False negatives may occur; thus, physicians may suggest a washout period and retest after two weeks if initial test is negative. Eradication confirmation is recommended at least four weeks post therapy; a positive result seven days post-treatment indicates treatment failure. ([jdos.nicholsinstitute.com](https://jdos.nicholsinstitute.com/dos/Medfusion/test/690819?utm_source=openai))
Methodology
Immunoassay (EIA)
Biomarkers
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen
Stool
Volume
0.5 mL or 0.5 grams semi-solid stool or 20 mm diameter solid stool
Minimum Volume
Not provided
Container
Plastic, leak‑proof container
Collection Instructions
Collect semi‑solid or solid stool in plastic leak‑proof container
Patient Preparation
No fasting required; avoid recent PPIs, bismuth, antimicrobials