The solid-phase gastric Helicobacter pylori mixed antigen on the spot reaction plate forms a complex with the Helicobacter pylori antibody in the serum, and the colloidal gold labeled anti human IgG antibody combines with the complex to form a red round spot visible to the naked eye.The examination methods of Helicobacter pylori include blood sampling examination and C13, C14 breath test. The positive detection of Helicobacter pylori antibody by blood sampling can only indicate that you have been infected with Helicobacter pylori and now you have antibodies, not whether you have infection now, because even if Helicobacter pylori infection is eradicated, the antibodies may still exist for more than half a year. If you want to know whether there is infection, you need to further do C13 and C14 breath test.