Historical epidemiology of hepatitis C virus (HCV) in selected countries

Area of Science:

• Hepatology
• Infectious Diseases
• Epidemiology

Background:

• Chronic hepatitis C virus (HCV) infection is a primary driver of liver disease worldwide.
• Emerging treatments necessitate a clear understanding of HCV's global epidemiology and disease burden.
• Accurate data are crucial for effective public health strategies and resource allocation.

Purpose of the Study:

• To characterize the epidemiology and disease burden of chronic HCV infection across 16 diverse countries.
• To assess variations in HCV prevalence, viremia, genotype distribution, diagnosis, and treatment rates.
• To provide reliable estimates for national HCV-infected populations to inform public health interventions.

Main Methods:

• Literature searches and expert consensus were employed to gather data on HCV prevalence, viremia, genotype, diagnosis, and treatment.
• Centralized registries and databases were utilized for country-specific estimates of diagnosis, treatment, and liver transplants.
• Data collection spanned multiple countries to capture regional epidemiological differences.

Main Results:

• Viremic HCV prevalence varied significantly, from 0.3% in Austria, England, and Germany to 8.5% in Egypt.
• Egypt (6,358,000 cases in 2008) and Brazil (2,106,000 cases in 2007) had the largest estimated viremic populations.
• Prevalence rates often higher in males, linked to injection drug use, with considerable international differences in diagnosis, treatment, and transplant rates.

Conclusions:

• Characterizing HCV-infected populations with reliable estimates is critical for mitigating HCV-related morbidity and mortality.
• Quantifying the national burden of chronic HCV infection is essential for targeted public health interventions.
• Significant disparities in HCV epidemiology and management necessitate tailored national strategies.