Clinical Chemistry and Laboratory Medicine (CCLM)
Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)
Editor-in-Chief: Plebani, Mario
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Development and evaluation of an automated hepatitis C virus NS5B sequence-based subtyping assay
1Virco BVBA, Mechelen, Belgium
2Tibotec-Virco, Mechelen, Belgium
aPresent address: Galápagos, Mechelen, Belgium.
bPresent address: MIPS NV, Zwijnaarde, Belgium.
Citation Information: Clinical Chemistry and Laboratory Medicine. Volume 48, Issue 8, Pages 1095–1102, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: 10.1515/CCLM.2010.236, June 2010
- Published Online:
Background: Hepatitis C virus (HCV) genotyping and accurate subtype determination is becoming increasingly important to better understand viral evolution, the development of resistance to STAT-C, and possibly even for the treatment and management of chronic HCV-infected patients.
Methods: A subtyping assay based on a 329-bp sequence of the NS5B region, together with an automated subtype interpretation tool was developed. Clinical samples of the six major genotypes were used to assess assay performance characteristics.
Results: The NS5B BLAST-based subtyping assay showed clinical sensitivity for amplification of 89% (n=603 random samples). Assessment of analytical sensitivity of amplification for genotypes 1, 2, 3 and 4 revealed a suitable performance for high viral load samples and decreased only with low viral loads. The results were 100% and 99% accurate at the genotype and subtype level, respectively. A concordance of 97% on genotype level and 62% on subtype level was observed by comparison with subtype results from 5′ non-coding-based assays with a panel of 276 isolates.
Conclusions: The HCV NS5B subtyping assay has been validated for research use. Based on its performance, it is the method of choice in cases where subtype rather than genotype information is needed.
Clin Chem Lab Med 2010;48:1095–102.
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