[Comparison between two 13C-urea breath tests for the diagnosis of Helicobacter pylori infection: isotope ratio mass spectrometer versus infrared spectrometer].

Objectives: To compare the accuracy of the breath test using the isotope ratio mass spectrometer (IRMS) versus the nondispersive isotope-selective infrared spectrometer (NDIRS) in the diagnosis of Helicobacter pylori infection.

Method: Multicenter study in 4 Spanish hospitals. One group of dyspeptic patients who had not undergone prior eradication therapy and another group of patients with gastric ulcer or gastrointestinal bleeding due to gastroduodenal ulcer receiving H.

[Helicobacter pylori infection and functional dyspepsia. Meta-analysis of efficacy of eradication therapy].

Background: To establish a causal link between Helicobacter pylori infection and functional dyspepsia it is necessary to demonstrate that H. pylori eradication induces an improvement in dyspeptic symptoms. Our aim was to perform a meta-analysis of randomized studies comparing, in functional dyspepsia, the efficacy of H.

[Stool antigen test for initial Helicobacter pylori diagnosis and for confirmation of eradication after therapy].

Background: : Recently, a new diagnostic method based on the detection of Helicobacter pylori antigen in stools (HpSA) has been developed. Our aim was to prospectively evaluate the accuracy of HpSA both in the initial diagnosis of H. pylori infection and in the confirmation of the eradication after treatment.