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2008, Cilt 38, Sayı 1, Sayfa(lar) 037-041
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Evaluation of diagnostic autoantibody tests used in clinical laboratories
Zeki Yumuk, Şeyda Çalışkan
Kocaeli Üniversitesi Tıp Fakültesi Mikrobiyoloji ve Klinik Mikrobiyoloji Anabilim Dalı
Keywords: Autoantibody, anti nuclear antibody, dsDNA

Anti nuclear antibody (ANA) tests are valuable in the diagnosis of autoimmune disease such as systemic lupus erythematosus. Indirect immunofluorescence (IIF) assay have been used more than 40 years for ANA tests. Because the use of IIF is time-consuming and requires highly trained personnel considerable effort has been put into developing simpler assays for routine use. However, newer tests can never be rated better than the old. Thus, laboratories performing autoantibody tests should continuously evaluate the newer alternative tests. In the present study, the classical autoantibody tests and the newer alternatives in our routine laboratory were evaluated. In conclusion, dsDNA test should be confirmed with a second test. For dsDNA, primarily IIF or RIA should be preferred and then confirmed with ELISA method. Titration should be performed to homogenous pattern positive results. ENA immunoblotting method might be used as a screening method and confirmation should be reached with an ELISA method. In a clinical laboratory, before performing autoantibody tests, a comparable study concerning commercial and methodological features should be done.

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