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  • Title: Performance of a new rapid whole blood coeliac test in adult patients with low prevalence of endomysial antibodies.
    Author: Raivio T, Korponay-Szabó I, Collin P, Laurila K, Huhtala H, Kaartinen T, Partanen J, Mäki M, Kaukinen K.
    Journal: Dig Liver Dis; 2007 Dec; 39(12):1057-63. PubMed ID: 17983878.
    Abstract:
    BACKGROUND: In coeliac disease endomysial and transglutaminase autoantibodies are directed against the human autoantigen, transglutaminase. The conventional coeliac antibody tests are performed from serum samples in centralized laboratories. AIMS: To evaluate a rapid and easy immunoglobulin A-class whole blood point-of-care test and its commercial application, the Biocard test, in coeliac autoantibody detection. METHODS: In the whole blood point-of-care test transglutaminase is liberated from the red blood cells by haemolysis. Transglutaminase antibodies, if present, complex with the liberated antigen, and are visualized. Altogether 51 biopsy-proven untreated coeliac adult patients, 48 of the same patients after treatment, and 36 controls were tested. The point-of-care test results were compared with serum endomysial and transglutaminase antibody and Biocard test results and histology. RESULTS: The whole blood point-of-care test was as sensitive (82%) as the serum endomysium test (80%) in detecting untreated coeliac disease while the serum transglutaminase antibody test was superior (88%). The tests had 100% specificity. A positive point-of-care test result seroconverted or the test reaction weakened in 90% of the treated coeliac patients. Biocard test-positive were 22 of the 24 tested untreated coeliac patients. Biocard test-negative were 15 of 19 controls. CONCLUSIONS: The whole blood rapid tests are as reliable as the conventional serological tests in detecting untreated coeliac disease and in coeliac disease diet monitoring.
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