Chronic hepatitis C virus in the state of Piauí, northeastern Brazil

Area of Science:

• Hepatology
• Virology
• Epidemiology

Background:

• Genotype distribution of Hepatitis C Virus (HCV) is crucial for treatment efficacy, as genotype 1 exhibits lower response rates.
• Understanding HCV genotypes in specific regions like Northeast Brazil is vital for public health initiatives.

Purpose of the Study:

• To characterize the clinical and laboratorial profiles of chronic hepatitis C (CHC) patients in Piauí, Brazil.
• To determine the distribution of HCV genotypes and subtypes in this Brazilian state.
• To assess the relationship between HCV genotypes and clinical parameters like viral load and liver enzyme levels.

Main Methods:

• A retrospective cross-sectional study was conducted from April 1999 to August 2005.
• Data from 153 CHC patients in Piauí were analyzed, including demographic, clinical, laboratorial, and histopathological information.
• HCV genotyping was performed, and viral loads and gamma-glutamyltransferase (GGT) levels were compared across genotypes.

Main Results:

• Genotypes 1 and 3 of HCV were homogeneously distributed (50.0% and 49.0%, respectively), with subtype 3a being the most frequent (49.0%).
• Patients with HCV genotype 1b had significantly higher viral loads compared to 1a and 3a subtypes.
• Genotype 1 showed statistically higher average gamma-glutamyltransferase levels than genotype 3.
• The majority of patients presented with mild to moderate histopathological liver disease (necroinflammatory activity and fibrosis).

Conclusions:

• HCV treatment candidates in Piauí generally have clinically stable liver disease.
• The study confirmed a nearly equal prevalence of HCV genotypes 1 and 3 in the region.
• No significant demographic or clinical differences were observed among the different HCV genotypes or subtypes studied.