Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8737304 | Diagnostic Microbiology and Infectious Disease | 2018 | 25 Pages |
Abstract
Due to their specificity to B. pertussis antigens, immunoglobulin G (IgG) antibodies should be measured primarily for diagnosing pertussis. We compared the diagnostic performance of commercially available enzyme-linked immunosorbent assays (ELISAs) and chemiluminescent immunoassays (CLIAs) measuring IgG to B. pertussis antigens. An in-house ELISA with purified pertussis toxin (PT) was used as reference system. Commercial assays using PT only as coating antigen showed better performance as compared to those using a mixture of different antigens. The best diagnostic performances were achieved by CLIAs. Results were analyzed using a dual cutoff of either â¥125 IU/mL anti-PT IgG or â¥62 IU/mL anti-PT IgG for the in-house ELISA and accordingly to package inserts for commercial assays. Using the in-house ELISA at a 62 IU/mL cutoff, as the gold standard for interpretation of results from the commercial kits, resulted in lower sensitivity and higher specificity as compared to 125 IU/mL, thus, it may be especially useful in outbreak situations when high specificity is required.
Keywords
EQACLIAIgGPRIPPVROCAUCB. pertussischemiluminescent immunoassayenzyme-linked immunosorbent assayspositive predictive valuenegative predictive valueimmunoglobulin GELISADiagnosisexternal quality assuranceSerologypertussis toxinReceiver operator characteristicsNPV یا negative predictive valuearea under the curve
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Authors
Giorgio Fedele, Pasqualina Leone, Stefania Bellino, Ilaria Schiavoni, Claudia Pavia, Tiziana Lazzarotto, Paola Stefanelli,