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The infection with hepatitis C virus has drawn attention to researchers from 1970. Nowadays, hepatitis C virus infection is a global public health issue, affecting approximately 3% of the global population. Experimental models provided vital data on the understanding of viral replication. Chronic infection with hepatitis C virus is generally a progressive lent disease characterized by the persistence of inflammation in the liver and correlated with the cirrhosis in about 20% of patients after 20-30 years of infection. Hepatitis C virus is still a public health threat, but progress in monitoring and treatment of infected patients is truly noticeable and has remarkably improved the prospects for this disease. [ABSTRACT FROM AUTHOR]

Introduction: Chronic hepatitis C cases diagnosed in Romania were mostly related to unsafe parenteral treatments and blood transfusions; HCV genotype 1b was prevalent. During the last decade, an increasing number of HCV infections was reported among people who inject drugs (PWID). The aim of the current study was to test if this epidemiological shift triggered a diversification of the circulating viral strains. Methodology: HCV genotypes were determined by reverse hybridization in 130 HCV-infected PWID (87.7% males; mean age 27.9 ± 6.7 years, injecting drugs for 8.1 ± 4.8 years). Results: HIV-HCV co-infection was diagnosed in 80.8% of the subjects and 26.9% were HIV-HCV-HBV triple infected. Active HCV viral replication was present in 104 PWID (80%), more frequently in those HIV-co-infected (91.4% vs. 52% in HCV mono-infected, and 77.148.5% in HIV-HCV-HBV triple-infected, p = 0.0001). Non-1b genotypes were prevalent (54.8%), with subtype 1a the most commonly detected (24%), followed by genotypes 3a (14.4%) and 4 (7.7%). Mixed infections with genotypes 1a and 1b were found in nine subjects (8.7%). There was no difference in the genotypes frequencies based on HIV or HBV co-infection status, length of drug usage, or associated risk factors (tattoos, piercing, detention). Conclusion: The continuous surveillance of HCV genotypes in PWID from Romania will add valuable information to the overall European epidemiological picture, with important therapeutic implications. [ABSTRACT FROM AUTHOR]

Introduction. Chronic HCV infection represents a public health problem in Romania, with a prevalence of 3.23-4.56%, and more than 5,000 patients on the waiting lists for antiviral therapy. Aim: To perform an evaluation of the severity of chronic HCV infection genotype 1b, and a quantification of patients with a low viral load, in order to quantify the number of patients who may be considered for shortened treatment duration. Material: Histological assessment and viral load were performed in 1,220 consecutive patients from the waiting list for antiviral therapy in 2009. The severity of chronic hepatitis was assessed by histological evaluation (the necrotic-inflammatory index - Metavir and the fibrosis score - Metavir). Viral load was measured by PCR and 400,000UI/ml and 600,000UI/ml were defined as thresholds for low versus high viral load We assessed the influence of age, sex, and viral load on necro-inflammatory activity and fibrosis. Results: The mean age of the patients included was 48 ±10.69 years and females predominated (58%). Many of them (60%) were in stage F3, with a high potential for disease progression in the next 10 years (necro-inflammatory activity was moderate to severe in over 90%). Almost half of the patients had low viral load, below 600,000 copies/ml. The viral load was significantly associated with the age (p< 0.001) and sex (p< 0.001) of the patients. Conclusion: Chronic HCV hepatitis in patients on the waiting lists for antiviral therapy in Romania has a high severity with important predictable consequences on the duration of life, complications and treatment costs. The strategy of shortening the duration of treatment would be beneficial for almost 50% of the patients. [ABSTRACT FROM AUTHOR]