Description: The Helicobacter pylori is an ureases producer bacteria, that affects mainly underdeveloped countries (38 to 90% of prevalence in children). Its transmission seems to be oral - oral or fecal - oral. This infection entails to chronicle inflammation of the duodenum or antrum or piloric region with later ulcer, adenocarcinoma or limphoma. It causes dispepsias and recurrent abdominal pain (RAP). The diagnostic tests include rapid urease and histopatology (gold standard). The objectives of the study were to analyze the effectiveness of the rapid urease test (RUT) and to determine the prevalence of the infection. Materials