Matthews, G.Cummins, A.Lawrence, A.Johnson, B.Campbell, F.Butler, R.2007-05-102007-05-102005Journal of Gastroenterology and Hepatology (Australia), 2005; 20(2):270-2740815-93191440-1746http://hdl.handle.net/2440/27485<h4>Background</h4>The purpose of the present paper was to assess the reproducibility of the (13)C-urea breath test ((13)C-UBT) and its ability to reflect the level of Helicobacter pylori-associated inflammation.<h4>Methods</h4>Asymptomatic H. pylori-positive subjects (n = 21) performed the (13)C-UBT six times. The H. pylori-positive symptomatic subjects (n = 55) performed the (13)C-UBT and had antral biopsies taken for histopathology, culture, urease activity assay and myeloperoxidase activity assay.<h4>Results</h4>No significant intraindividual variation in (13)C-UBT results were observed for the asymptomatic subjects. The (13)C-UBT results were significantly higher in symptomatic subjects with a moderate to severe gastritis compared to a mild gastritis and to no inflammation (34.5 +/- 4.4 vs 17.7 +/- 2.8 vs 1.7 +/- 0.1, respectively, P < 0.01). The (13)C-UBT results significantly correlated with urease (r = 0.55) and myeloperoxidase activity (r = 0.82) but not with bacterial load. conclusion: The (13)C-UBT is a reproducible determinant of H. pylori infection and non-invasively assesses the severity of antral inflammation.enHumansHelicobacter pyloriHelicobacter InfectionsUreaPeroxidaseBreath TestsGastroscopySeverity of Illness IndexSensitivity and SpecificityReproducibility of ResultsAdolescentAdultAgedAged, 80 and overMiddle AgedFemaleMaleJournal article002005018910.1111/j.1440-1746.2005.03547.x0002276099000162-s2.0-1484430463755236Cummins, A. [0000-0003-3115-9498]