H. pylori
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Helicobacter pylori Antigen, Feces
Test ID: HPYL F
Test
Aliases/Synonyms
Method
Enzyme Immunoassay
Report Includes
Helicobacter pylori Antigen
Specimens
Feces
Clinical Utility
Colonization with H. pylori is associated with increased risk of patients developing gastritis, peptic ulcer disease, and gastric adenocarcinoma. Stool antigen testing provides a sensitive measure of infection including during and after treatment. This test is cleared for use with specimens from pediatric patients.
Test Location
Quest Diagnostics, California USA
Test Version
5-Apr-2022
Specimen
Specimens
Feces
Sample Volume
0.5 g
Patient Preparation
For initial diagnostic purposes no special patient preparation is required. Patients are not required to be off of medications or to fast before this test. While positive test results from patients taking agents such as proton pump inhibitors and antimicrobials should be considered accurate, false negative results may be obtained with recent PPI use. For this reason, physicians may suggest the patient go off medications for two weeks and repeat test if negative results are obtained.
Collection & Handling
Collection Instructions
Collect specimen in sterile leak-proof container. Do not place stool in preservative, transport media or swab. Refer to Patient Preparation document prior to collection: Patient Preparation Instructions
Handling Information
Store and send frozen
Stability
| Ambient | 4 days |
|---|---|
| Refrigerated | 4 days |
| Frozen | 14 days |
Rejection Criteria
| Specimen | Watery or diarrheal stool |
|---|
Test Version
5-Apr-2022
Performance / Interpretation
Method
Enzyme Immunoassay
Turnaround Time
5 days
Results
| Name | Units | Reference Range | Conversion Factor | |
|---|---|---|---|---|
| Helicobacter pylori Antigen | Qualitative Test |
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While positive test results from patients taking agents such as proton pump inhibitors and antimicrobials should be considered accurate, false negative results may be obtained. For this reason, physicians may suggest the patient go off medications for two weeks and repeat test if negative results are obtained.
To confirm eradication, testing should be done at least 4 weeks following the completion of treatment. However, a positive test result 7 days post therapy is indicative of treatment failure.
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Test Location
Quest Diagnostics, California USA
Test Version
5-Apr-2022
Interface / Setup
Test Version
5-Apr-2022