Which non-invasive tests are commonly used to diagnose Helicobacter pylori infection?

Which non-invasive tests are commonly used to diagnose Helicobacter pylori infection?

• A. Urea breath test and stool antigen test.
• B. Endoscopy with biopsy.
• C. Stool culture.
• D. Urine antigen test.

Answer: (A)

The main idea is that non-invasive testing for Helicobacter pylori relies on detecting the bacteria’s activity or its components without needing to visualize the stomach lining. The two commonly used tests are the urea breath test and the stool antigen test. In the urea breath test, the patient ingests labeled urea; if H. pylori is present, its urease breaks the urea into labeled CO2, which shows up in the breath and indicates an active infection. The stool antigen test detects H. pylori–specific antigens shed in the stool, confirming current infection. Both tests are non-invasive, convenient, and have high accuracy, making them preferred first-line diagnostic tools and useful for confirming eradication after treatment. Endoscopy with biopsy is invasive and reserved for situations requiring direct visualization or tissue sampling; stool culture is less practical routinely due to time and lab requirements; urine antigen tests exist but are not as widely used or reliable as the breath and stool antigen tests in many settings.

The main idea is that non-invasive testing for Helicobacter pylori relies on detecting the bacteria’s activity or its components without needing to visualize the stomach lining. The two commonly used tests are the urea breath test and the stool antigen test. In the urea breath test, the patient ingests labeled urea; if H. pylori is present, its urease breaks the urea into labeled CO2, which shows up in the breath and indicates an active infection. The stool antigen test detects H. pylori–specific antigens shed in the stool, confirming current infection. Both tests are non-invasive, convenient, and have high accuracy, making them preferred first-line diagnostic tools and useful for confirming eradication after treatment. Endoscopy with biopsy is invasive and reserved for situations requiring direct visualization or tissue sampling; stool culture is less practical routinely due to time and lab requirements; urine antigen tests exist but are not as widely used or reliable as the breath and stool antigen tests in many settings.