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  • Title: Changing molecular epidemiology of hepatitis C virus infection in Northeast Italy.
    Author: Dal Molin G, Ansaldi F, Biagi C, D'Agaro P, Comar M, Crocè L, Tiribelli C, Campello C.
    Journal: J Med Virol; 2002 Nov; 68(3):352-6. PubMed ID: 12226821.
    Abstract:
    To assess HCV genotype distribution and its determinants, 318 consecutive HCV RNA positive patients were examined. Subtype 1b infection was the most prevalent (35.5%), followed by subtype 1a (22%), 3a (21.4%) and 2 genotype (21.3%). Subtypes 1a, 1b and 3a had a comparable prevalence (30-35%) in the 0-15-, 16-30- and 31-45-year age groups. In subjects older than 45 years, genotype 2 prevalence increased, whereas subtype 1a and 3a infections decreased markedly. In this age group types 1b and 2 accounted for a prevalence of more than 90% in a comparable proportion. Genotype prevalence rates according to different risk factors were different statistically (P < 0.001): subtype 1a and 3a infections were predominant in injection drug users (42.9% and 37.7%, respectively), whereas community acquired infections and infections in patients with a history of transfusion were caused mainly by subtype 1b (38.5% and 66.6%, respectively). Logistic regression showed that age and injection drug use are independent determinants of genotype distribution.
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