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A comparative study of two third-generation anti-hepatitis C virus ELISAs
F Ferrer1, M J Candela, C Garcia
1Hematology-Hemotherapy Unit, School of Medicine, Centro Regional de Hemodonación, Murcia, Spain.
Haematologica
|March 21, 1998
Summary
This study compared two hepatitis C virus antibody screening tests. The Ortho ELISA showed higher positive predictive value and fewer false positives than the Abbott test, though both had similar sensitivity.
Area of Science:
- * Hepatology and Virology
- * Clinical Diagnostics and Immunology
Background:
- * Accurate screening for antibody to hepatitis C virus (anti-HCV) is crucial for blood safety.
- * Third-generation enzyme immunoassays (ELISAs) are widely used for anti-HCV detection.
Purpose of the Study:
- * To evaluate and compare the sensitivity and specificity of two third-generation anti-HCV screening tests: Abbott HCV EIA 3.0 and Ortho HCV ELISA 3.0.
- * To determine the positive predictive value of each assay in a large cohort of blood donors.
Main Methods:
- * A side-by-side evaluation of Abbott HCV EIA 3.0 and Ortho HCV ELISA 3.0 using 15,540 serum samples from healthy blood donors.
- * Reactive specimens were retested by the alternative ELISA and confirmed using Recombinant Immunoblot Assay (RIBA-3).
Main Results:
- * Ortho ELISA identified significantly fewer reactive cases (0.24%) compared to Abbott (0.52%).
- * Ortho-positive samples showed higher confirmation rates by Abbott ELISA (66.6%) and RIBA-3 (47.6%) than Abbott-positive samples confirmed by Ortho (20% and 17.2%, respectively).
- * Both ELISAs demonstrated comparable sensitivity, with all RIBA-3 positive samples reactive in both assays.
Conclusions:
- * The Ortho HCV ELISA 3.0 demonstrated a higher positive predictive value and fewer false-positive results compared to the Abbott HCV EIA 3.0.
- * Despite differences in initial reactivity and predictive value, both third-generation assays exhibit similar sensitivity for anti-HCV detection.