Abstract
Two novel commercial IgG enzyme immunoassay (EIA) systems based on acid-glycine-extracted (Pyloriset IgG EIA, Orion Diagnostica) or fast protein liquid chromatography-purified (Cobas Core Anti-H. pylori EIA, Roche Diagnostic Systems)Helicobacter antigens were evaluated in a prospective study involving 127 patients. All patients underwent upper endoscopy with biopsy, and biopsies were examined for the presence ofHelicobacter pylori by a rapid urease test, microscopy and culture. Of the 71 patients found to be infected withHelicobacter pylori, 69 (97.2 %) and 65 (91.5 %) tested positive with the Cobas Core and Pyloriset test, respectively. A detailed receiver operating characteristic analysis of the two tests showed that the Cobas Core assay was more sensitive and specific at every possible cut-off level; gave a better resolution of individual results, indicating a greater fine-sensitivity; and had no grey zone compared to a large grey zone encompassing 13.4 % of the serum samples tested with the Pyloriset EIA. The Cobas Core assay appears to be a valuable tool for epidemiological purposes as well as for pre-endoscopic screening of dyspeptic patients.
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Trautmann, M., Moldrzyk, M., Vogt, K. et al. Use of a receiver operating characteristic in the evaluation of two commercial enzyme immunoassays for detection ofHelicobacter pylori infection. Eur. J. Clin. Microbiol. Infect. Dis. 13, 812–819 (1994). https://doi.org/10.1007/BF02111341
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DOI: https://doi.org/10.1007/BF02111341