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Experience with PCR screening.

R Sun1, H Jayakar, S Yeh

  • 1Roche Molecular Systems, Inc., Pleasanton, CA 94566, USA.

Developments in Biologicals
|May 4, 2000
PubMed
Summary
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The COBAS AmpliScreen Hepatitis C (HCV) Test, Version 2.0, detects HCV RNA in pooled plasma samples. This sensitive assay identifies infection earlier than antibody tests, improving blood safety.

Area of Science:

  • Virology
  • Molecular Diagnostics
  • Public Health

Background:

  • Blood screening is crucial for preventing transfusion-transmitted infections.
  • Current methods may have limitations in early detection of viral markers.

Purpose of the Study:

  • To evaluate the analytical sensitivity and performance of the COBAS AmpliScreen Hepatitis C (HCV) Test, Version 2.0.
  • To assess the test's ability to detect HCV RNA in pooled plasma samples.

Main Methods:

  • Utilized the MultiPrep sample processing procedure for simultaneous extraction of HCV, HIV-1, and Hepatitis B virus (HBV).
  • Employed Reverse Transcription Polymerase Chain Reaction (RT-PCR) with specific primers and oligonucleotide probes for detection.
  • Incorporated an HCV Internal Control (IC) RNA for extraction and amplification control.

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Main Results:

  • Achieved analytical sensitivity of 25 International Units (IU) of HCV per mL of pooled plasma.
  • Detected HCV RNA 23–32 days before anti-HCV antibody seroconversion in tested panels.
  • Demonstrated ability to detect a single infected unit in a pool of 23 uninfected units.

Conclusions:

  • The COBAS AmpliScreen HCV Test, Version 2.0, offers high sensitivity for detecting HCV RNA in pooled plasma.
  • The MultiPrep method allows for simultaneous screening of HCV, HIV-1, and HBV from a single processed specimen, enhancing blood safety protocols.