Question:easy
Urea breath test is used for diagnosis of:
Urea breath test is used for diagnosis of:
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Think of the urease-positive spiral bacterium of the stomach.
Updated On: Jun 24, 2026
- H. pylori
- Campylobacter jejuni
- E. coli
- Lactobacillus
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The Correct Option is A
Solution and Explanation
Step 1: Ask which gut organism is famous for splitting urea, because the test is named after that reaction.
Step 2: Helicobacter pylori carries an abundant urease. When isotope-tagged urea is ingested, the enzyme converts it to ammonia plus carbon dioxide. The tagged CO2 escapes into the blood, reaches the lungs and appears in the breath, where it is measured.
Step 3: Because only H. pylori among the choices produces this brisk urease activity, it is the organism diagnosed by the breath test. The other three do not.
\[\boxed{\text{H. pylori}}\]
Step 2: Helicobacter pylori carries an abundant urease. When isotope-tagged urea is ingested, the enzyme converts it to ammonia plus carbon dioxide. The tagged CO2 escapes into the blood, reaches the lungs and appears in the breath, where it is measured.
Step 3: Because only H. pylori among the choices produces this brisk urease activity, it is the organism diagnosed by the breath test. The other three do not.
\[\boxed{\text{H. pylori}}\]
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