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The urea breath test (UBT) is a non-invasive test for diagnosing the presence of a bacterium, Helicobacter pylori (H. pylori) in the stomach. H. pylori causes inflammation, ulcers, and atrophy of the stomach. The test also may be used for follow-up exam of H. pylori eradication treatment regime.

Comparing to OGD, urea breath test gives equally accurate result in terms of Helicobacter detection, while OGD provides additional information such as presence of inflammation or ulcer in the stomach.