Blood tests for H. pylori may be positive for several years after the infection, so the urea breath test, the stool antigen test, or a biopsy may be used to find out if treatment has been effective. If your symptoms don't go away, an endoscopy may be needed.
A blood test checks to see whether your body has made antibodies to H. pylori bacteria. If you have antibodies to H. pylori in your blood, it means you either are currently infected or have been infected in the past.
The helicobacter pylori blood test works by testing one’s blood for h pylori antibodies. Antibodies are a type of protein released by the immune system in response to the presence of foreign substances such as infection.
H. pylori infection was diagnosed with a rapid urease test (CLO-test) and 13C urea breath test (UBT). Performance characteristics for the 13C urea blood test for diagnosis and evaluation of H. pylori eradication were calculat-ed using UBT and CLO as gold standards.
Blood test. Analysis of a blood sample may reveal evidence of an active or previous H. pylori infection in your body. However, breath and stool tests are better at detecting active H. pylori infections than is a blood test.