Antral biopsy urease test: Sensitivity and Specificity
[sens/spec is per UpToDate]
One reason for lack of specificity: If specifmen contains less common non-pylori gastric helicobacters, which give only weakly positive results in the biopsy urease test. Positive identification of these bacteria requires visualization of the characteristic long, tight spirals in histologic sections.
90% sensitive, 95% specific