Hepatitis C Virus (HCV): Symptoms & Treatment
The Hepatitis C Virus (HCV) causes liver inflammation and can become chronic. Learn about transmission, symptoms, diagnosis, and modern treatment options.
Things worth knowing about "Hepatitis C Virus"
The Hepatitis C Virus (HCV) causes liver inflammation and can become chronic. Learn about transmission, symptoms, diagnosis, and modern treatment options.
What is the Hepatitis C Virus?
The Hepatitis C Virus (HCV) is an RNA virus belonging to the Flaviviridae family that causes inflammation of the liver, known as hepatitis C. In many cases, the initial infection produces no noticeable symptoms. However, if left untreated, the disease can progress to chronic liver disease, eventually leading to liver cirrhosis or liver cancer. Globally, an estimated 50 to 80 million people are living with HCV infection.
Transmission
HCV is primarily transmitted through blood-to-blood contact. The most common routes of transmission include:
- Sharing injection equipment among people who inject drugs
- Use of unsterilized medical or dental instruments
- Blood transfusions and blood products (prior to the introduction of screening)
- Needlestick injuries in healthcare settings
- Sexual contact (less common, but possible especially when wounds are present)
- Vertical transmission from mother to child during birth
Unlike hepatitis A, HCV is not spread through food, water, or casual everyday contact.
Symptoms
Acute Phase
Approximately 70 to 80 percent of people with acute HCV infection experience no significant symptoms. When symptoms do occur, they may include:
- Fatigue and general malaise
- Nausea and loss of appetite
- Abdominal pain in the upper right area
- Dark urine and pale stools
- Yellowing of the skin and eyes (jaundice)
Chronic Phase
Between 55 and 85 percent of infected individuals develop chronic hepatitis C. This stage can remain largely asymptomatic for many years, while silently causing progressive liver damage. Long-term complications include:
- Liver fibrosis (scarring of liver tissue)
- Liver cirrhosis (advanced structural remodeling)
- Hepatocellular carcinoma (primary liver cancer)
Diagnosis
Diagnosis of HCV infection is made through blood tests:
- Anti-HCV antibody test: Detects antibodies against HCV; a positive result indicates past or current infection.
- HCV RNA test (PCR): Directly detects viral genetic material in the blood; confirms active infection and measures viral load.
- HCV genotyping: Identifies the virus subtype (genotypes 1 to 6) to guide treatment selection.
- Liver function tests and liver biopsy: Assess the degree of liver damage.
Treatment
The introduction of direct-acting antivirals (DAAs) has revolutionized hepatitis C treatment. Modern therapies achieve cure rates exceeding 95 percent.
Direct-Acting Antivirals (DAAs)
DAAs target specific steps in the viral replication cycle. They are typically taken as a combination therapy for 8 to 12 weeks. Key drug classes include:
- NS5B polymerase inhibitors (e.g., sofosbuvir)
- NS5A inhibitors (e.g., ledipasvir, daclatasvir)
- NS3/4A protease inhibitors (e.g., glecaprevir, voxilaprevir)
The treatment goal is a sustained virologic response (SVR), defined as undetectable HCV RNA 12 weeks after completing therapy. This is considered a functional cure.
Supportive Measures
In addition to antiviral therapy, patients are advised to avoid alcohol, follow a liver-friendly diet, and attend regular medical check-ups to monitor liver health.
Prevention
Since there is no approved vaccine against hepatitis C, prevention focuses on reducing exposure to the virus:
- Using sterile, single-use injection equipment
- Wearing protective equipment in healthcare settings
- Ensuring safe blood supplies through screening programs
- Education and awareness about transmission routes
References
- World Health Organization (WHO): Hepatitis C. Fact Sheet. Geneva, 2023. Available at: https://www.who.int/news-room/fact-sheets/detail/hepatitis-c
- European Association for the Study of the Liver (EASL): EASL Recommendations on Treatment of Hepatitis C. Journal of Hepatology, 2020.
- Ghany MG et al.: Hepatitis C Guidance 2019 Update: American Association for the Study of Liver Diseases - Infectious Diseases Society of America Recommendations for Testing, Managing, and Treating Hepatitis C Virus Infection. Hepatology, 2019.
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