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Table 147-1

Tests for Detection of H. Pylori

TestSensitivity/Specificity, %Comments
Invasive (endoscopy/biopsy required)
Rapid urease80-95/95-100Simple, false negative with recent use of PPIs, antibiotics, or bismuth compounds
Histology80-90/>95Requires pathology processing and staining; provides histologic information
Culture—/—Time consuming, expensive, dependent on experience; allows determination of antibiotic susceptibility
Noninvasive
Serology>80/>90Inexpensive, convenient; not useful for early follow-up
Urea breath test>90/>90Simple, rapid; useful for early follow-up; false negatives with recent therapy (see rapid urease test); exposure to low-dose radiation with 14C test
Stool antigen>90/>90Inexpensive, convenient; not established for eradication but promising

Abbreviation: PPIs, proton pump inhibitors.