[Diagnostic methods in Helicobacter pylori infection]

Since their description by Marshall and Warren now ten years ago, a lot of tests have emerging in order to detect infection by Helicobacter pylori. These tests are analyzed in this paper. We divided them in invasive, because they need an endoscopy with biopsy and non invasive with no endoscopy. We inform about the sensitivity and specificity of each one. From the invasive test the histology could be a good alternative for the diagnosis. In order to do epidemiological studies serology is good, and to evaluate the therapeutic efficacy we recommended the 14C or 13C-urea breath test.