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Summary

This summary is machine-generated.

Standardized reference reagents for viral load testing are crucial for blood safety. A new WHO International Standard for hepatitis C virus RNA nucleic acid amplification testing (NAT) allows for consistent results across laboratories. Further standards for hepatitis B virus DNA and HIV-1 RNA NAT are in development.

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Area of Science:

Biotechnology
Virology
Blood Safety

Background:

Nucleic acid amplification technology (NAT) assays are vital for detecting viral contamination in blood products.
Well-characterized reference reagents are essential for the reliable performance of NAT assays.
Independent characterization of working reagents for hepatitis C virus (HCV) RNA, hepatitis B virus (HBV) DNA, human immunodeficiency virus type 1 (HIV-1) RNA, and human parvovirus B19 DNA has hindered inter-laboratory result comparison.

Purpose of the Study:

To establish internationally recognized standards for NAT assays used in blood screening.
To enable consistent and comparable quantification of viral RNA and DNA across different laboratories and assays.
To support the global standardization of blood product safety testing.

Main Methods:

Establishment of working reagents for various viral NAT assays at national and commercial laboratories.
Independent characterization of these working reagents.
Development and calibration of a WHO International Standard for HCV RNA NAT assays in International Units (IU).
Completion of collaborative studies for candidate International Standards for HBV DNA and HIV-1 RNA NAT assays.

Main Results:

A WHO International Standard for HCV RNA NAT assays has been established and calibrated in IU.
This standard provides a common reference point for calibrating working reagents.
Collaborative studies for HBV DNA and HIV-1 RNA NAT International Standards have been successfully completed.

Conclusions:

The establishment of international standards is critical for harmonizing NAT assay results in blood product safety.
The new WHO International Standard for HCV RNA NAT facilitates comparable viral load measurements.
Ongoing development of standards for HBV DNA and HIV-1 RNA will further enhance global blood safety initiatives.