Question

A 46-year-old man with dyspepsia completes 14-day bismuth quadruple therapy for H. pylori. Which test and timing best confirm eradication?

Accepted Answer

Stool antigen test ≥4 weeks after therapy with PPI held for 1-2 weeks

Answer

Urea breath test at 1 week after therapy

Answer

Serologic IgG testing at any time

Answer

Repeat endoscopy with biopsy at 1 week

Answer

Stool culture immediately after therapy

Practice question

A 46-year-old man with dyspepsia completes 14-day bismuth quadruple therapy for H. pylori. Which test and timing best confirm eradication?