International Standards and Reference Materials for Quantitative Molecular Infectious Disease Testing  Roberta M. Madej, Jack Davis, Marcia J. Holden,

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Presentation transcript:

International Standards and Reference Materials for Quantitative Molecular Infectious Disease Testing  Roberta M. Madej, Jack Davis, Marcia J. Holden, Stan Kwang, Emmanuel Labourier, George J. Schneider  The Journal of Molecular Diagnostics  Volume 12, Issue 2, Pages 133-143 (March 2010) DOI: 10.2353/jmoldx.2010.090067 Copyright © 2010 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions

Figure 1 Evaluation of synthetic and biological HCV reference materials with three commercial HCV quantitative assays. Serial dilutions of the Paul Erlich Institute (PEI) regional HCV standard (80,000 IU/ml), high titer plasma, Armored RNA Quant HCV and synthetic HCV RNA transcript were tested using the RealTime HCV (A), COBAS AmpliPrep/COBAS TaqMan HCV (B), or VERSANT HCV RNA 3.0 assays (C). All test specimens were shipped and stored below −70°C. The HCV Armored RNA was prediluted, shipped, and stored in base human serum. Other specimens were formulated by each laboratory using the same base matrix immediately after thawing of the stock materials. The synthetic HCV RNA transcript was diluted in the presence of lysis reagent to inhibit potential degradation of the RNA by serum nucleases. At least six replicates of each dilution were tested in three independent runs with each assay. The synthetic materials were formulated in copies/ml of base matrix (2.5 × 103, 5 × 103, 1 × 104, 1 × 105, 1 × 106, and 1 × 107 copies/ml) and converted to IU/ml (IU/ml = copies/ml × 5). Ct, threshold cycle; RLU, relative light units. The Journal of Molecular Diagnostics 2010 12, 133-143DOI: (10.2353/jmoldx.2010.090067) Copyright © 2010 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions