Assessment of hepatitis C virus RNA and genotype from 6807 patients with chronic hepatitis C in the United States
Identifieur interne : 001059 ( Istex/Checkpoint ); précédent : 001058; suivant : 001060Assessment of hepatitis C virus RNA and genotype from 6807 patients with chronic hepatitis C in the United States
Auteurs : Blatt ; Mutchnick ; Tong ; Klion ; Lebovics ; Freilich ; Bach ; Smith ; Herrera ; Tobias ; Conrad ; Schmid ; McHutchison [États-Unis]Source :
- Journal of Viral Hepatitis [ 1352-0504 ] ; 2000-05.
Abstract
Hepatitis C virus (HCV) RNA status and HCV genotype have become important tools in the diagnosis and monitoring of therapy in chronic HCV infection. To establish a database with respect to HCV genotype and serum HCV RNA concentrations in chronic hepatitis C patients in the United States, we analysed 6807 chronic hepatitis C patients who had HCV RNA and HCV genotype tests conducted at a central laboratory. The HCV RNA concentration cut‐off for the lower 25th percentile of this population (low titre) was 0.9 × 106 copies ml–1. The median HCV RNA concentration was 3.5 × 106 copies ml–1 and the cut‐off for the upper 25th percentile (high titre) was 5 × 106 copies ml–1. Male patients had a median HCV RNA concentration of 3.9 × 106 copies ml–1, which was significantly higher than the median HCV RNA level for females (2.75 × 106 copies ml–1; P < 0.001). HCV genotype 1 was detected in 73% of patients; genotype 2 in 14%; genotype 3 in 8%; mixed genotype in 4%; and genotypes 4, 5 and 6 with a frequency of < 1%. Patients from the Northeast, Southeast and Midwest had significantly (P < 0.001) more infections with genotype 1 than patients from the Western and Southern regions. African–American patients were more likely to be infected with genotype 1 when compared with Caucasian, Hispanic or Asian Pacific Islanders (P < 0.001). Patients infected with HCV genotype 1 and mixed HCV genotypes had significantly higher serum HCV RNA concentrations when compared with HCV genotypes 2 and 3 (P < 0.001 for all comparisons).
Url:
DOI: 10.1046/j.1365-2893.2000.00221.x
Affiliations:
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<front><div type="abstract" xml:lang="en">Hepatitis C virus (HCV) RNA status and HCV genotype have become important tools in the diagnosis and monitoring of therapy in chronic HCV infection. To establish a database with respect to HCV genotype and serum HCV RNA concentrations in chronic hepatitis C patients in the United States, we analysed 6807 chronic hepatitis C patients who had HCV RNA and HCV genotype tests conducted at a central laboratory. The HCV RNA concentration cut‐off for the lower 25th percentile of this population (low titre) was 0.9 × 106 copies ml–1. The median HCV RNA concentration was 3.5 × 106 copies ml–1 and the cut‐off for the upper 25th percentile (high titre) was 5 × 106 copies ml–1. Male patients had a median HCV RNA concentration of 3.9 × 106 copies ml–1, which was significantly higher than the median HCV RNA level for females (2.75 × 106 copies ml–1; P < 0.001). HCV genotype 1 was detected in 73% of patients; genotype 2 in 14%; genotype 3 in 8%; mixed genotype in 4%; and genotypes 4, 5 and 6 with a frequency of < 1%. Patients from the Northeast, Southeast and Midwest had significantly (P < 0.001) more infections with genotype 1 than patients from the Western and Southern regions. African–American patients were more likely to be infected with genotype 1 when compared with Caucasian, Hispanic or Asian Pacific Islanders (P < 0.001). Patients infected with HCV genotype 1 and mixed HCV genotypes had significantly higher serum HCV RNA concentrations when compared with HCV genotypes 2 and 3 (P < 0.001 for all comparisons).</div>
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