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Mode of hepatitis C virus infection, epidemiology, and chronicity rate in the general population and risk groups
1Department of Gastroenterology and Hepatology, Zentrum für Innere Medizin und Dermatologie, Medizinische Hochschule Hannover, Germany.
Insights
Hepatitis C virus (HCV) causes significant liver disease. While screening reduced post-transfusion cases, community spread and risk factors like drug abuse and healthcare exposure persist, necessitating prevention strategies.
Area of Science:
- Hepatology
- Virology
- Infectious Diseases
Background:
- Hepatitis C virus (HCV) is a major cause of non-A, non-B hepatitis, particularly post-transfusion.
- While anti-HCV screening has lowered transfusion-related infections, community-acquired HCV remains a concern.
Purpose of the Study:
- To review the epidemiology and risk factors associated with Hepatitis C virus infection.
- To highlight populations at risk and potential transmission routes.
- To emphasize the importance of prevention in the absence of a vaccine.
Main Methods:
- Literature review of studies on Hepatitis C virus (HCV) epidemiology.
- Analysis of risk factors and transmission pathways.
- Examination of populations vulnerable to HCV infection.
Main Results:
- HCV infection can lead to cirrhosis, sometimes without prior clinical or laboratory evidence.
- High-risk groups include organ transplant recipients, healthcare workers, infants of infected mothers, hemodialysis patients, and intravenous drug users.
- Nosocomial transmission is possible, and factors like dental procedures, cocaine use, HIV, and lower socioeconomic status increase risk.
Conclusions:
- Prevention of exposure is crucial for reducing Hepatitis C virus transmission and prevalence due to the lack of an available vaccine.
- Understanding diverse risk factors is key to public health interventions against HCV.
Abstract:
Since the discovery of the hepatitis C virus (HCV), it has become evident that this infectious agent is a primary cause of posttransfusion and sporadic non-A, non-B hepatitis. Identification and introduction of surrogate markers for posttransfusion hepatitis and later introduction of anti-HCV screening has decreased the incidence of posttransfusion hepatitis. Community-acquired HCV infection is less common than posttransfusion HCV hepatitis. HCV infection may lead to liver cirrhosis without prior evidence of laboratory or histologic infection. Populations at risk for HCV infection include patients receiving organ transplants, health care workers, infants born to HCV-infected mothers, and hemodialysis patients. Intravenous drug abusers and their sexual partners also demonstrate a high rate of HCV infection. Nosocomial HCV transmission may occur despite the observance of universal precautions. Dental or surgical intervention, salivary inoculation, family members infected with HCV, cocaine abuse, HIV infection, and lower socioeconomic status also each correlate with an increased risk of infection. HCV infection is associated with many immune-mediated diseases. There may also be some relationship between human leukocyte antigens and HCV infection. Since there currently is no HCV vaccine, prevention of exposure remains the only possibility for reducing HCV transmission and prevalence.