Normal Reference Ranges
Adult
Negative Qualitative
Pediatric
Negative Qualitative
Clinical Significance
Detects active infection. Used for initial diagnosis of H. pylori and to confirm eradication >4 weeks post-treatment (must stop PPIs 1-2 weeks prior).
Causes of High
- Active Helicobacter pylori infection
Causes of Low
- Normal finding
- Eradicated infection