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The urea breath test is a rapid diagnostic procedure used to identify infections by Helicobacter pylori, a spiral bacterium implicated in gastritis, gastric ulcer, and peptic ulcer disease. It is based upon the ability of H. pylori to convert urea to ammonia and carbon dioxide.
H. pylori serologic testing, including IgG antibodies, are not recommended as a test of eradication as they may remain elevated for years after successful treatment of infection. [135] An endoscopic biopsy is an invasive means to test for H. pylori infection. Low-level infections can be missed by biopsy, so multiple samples are recommended.
Rapid urease test, also known as the CLO test (Campylobacter-like organism test), is a rapid diagnostic test for diagnosis of Helicobacter pylori. [1] The basis of the test is the ability of H. pylori to secrete the urease enzyme, which catalyzes the conversion of urea to ammonia and carbon dioxide .
Patients should be queried about any side effects, missed doses, and completion of therapy. As culture with antibiotic sensitivities is not routinely performed when a H. pylori infection is diagnosed, it is generally recommended that different antibiotics be given at higher doses for 14 days. [2]
The most recent guidelines for managing dyspepsia prohibit endoscopic use in patients under 60 years of age because its low yield, even in cases where alarm symptoms are present. [56] Noninvasive urea breath tests or stool antigen testing for H pylori should be performed on these patients. [15]
Investigation for H. pylori is not usually needed. [42] The current gold standard for diagnosis of GERD is esophageal pH monitoring. It is the most objective test to diagnose the reflux disease and allows monitoring GERD patients in their response to medical or surgical treatment.
Breath tests have their own reliability problems with a high rate of false positive. Some doctors factor in a patients' response to treatment as part of the diagnosis. [4] Biopsies of the small bowel in bacterial overgrowth can mimic celiac disease, with partial villous atrophy. Breath tests have been developed to test for bacterial overgrowth.
The presence of Helicobacter pylori (in peptic ulcer disease) can be tested for with the urea breath test. Exhaled nitric oxide is a breath test that might signal airway inflammation such as in asthma. Breath tests for diseases have been developed for early detection of lung cancer, breast cancer, pulmonary tuberculosis and many others, to ...