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Viral hepatitis: Milestones, unresolved issues, and future goals
Pietro Torre1, Andrea Aglitti1, Mario Masarone1
1Internal Medicine and Hepatology Unit, Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana," University of Salerno, Salerno 84081, Italy.
World Journal of Gastroenterology
|August 9, 2021
Summary
This review covers hepatitis A, B, C, D, and E, detailing their transmission, outcomes, and global impact. It highlights differences in viral hepatitis, including chronic infections and zoonotic transmission of hepatitis E.
Area of Science:
- Hepatology
- Virology
- Public Health
Background:
- Viral hepatitis, encompassing hepatitis A, B, C, D, and E, presents a significant global health challenge characterized by liver inflammation.
- Hepatitis B and C viruses (HBV, HCV) are blood-borne pathogens, often leading to chronic hepatitis, cirrhosis, and affecting over 300 million individuals worldwide.
- Hepatitis D virus (HDV) exacerbates HBV infections, while hepatitis A and E viruses (HAV, HEV) are primarily fecal-orally transmitted, with HEV emerging as a zoonosis in developed nations.
Purpose of the Study:
- To provide a comprehensive overview of the current knowledge regarding hepatitis A, B, C, D, and E.
- To delineate the distinct characteristics of each hepatitis virus, including their epidemiology, transmission routes, and clinical outcomes.
- To identify research gaps and discuss future directions in the management and prevention of viral hepatitis.
Main Methods:
- Systematic review of existing literature on viral hepatitis.
- Analysis of epidemiological data, transmission dynamics, and clinical manifestations of hepatitis A, B, C, D, and E.
- Synthesis of current research findings and identification of areas requiring further investigation.
Main Results:
- Hepatitis B and C infections can lead to chronic liver disease and cirrhosis, with a substantial global burden.
- Hepatitis D coinfection with Hepatitis B results in more severe liver disease outcomes.
- Hepatitis A and E typically cause self-limiting illness, but HEV can lead to chronic infection in immunosuppressed individuals.
Conclusions:
- Understanding the diverse nature of viral hepatitis is crucial for targeted public health interventions.
- Further research is needed to address unresolved issues, particularly concerning chronic infections and emerging zoonotic transmissions.
- Future strategies should focus on prevention, early detection, and improved management of all forms of viral hepatitis.
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