About Chronic Hepatitis B

Overview

Chronic hepatitis B (CHB) is a long-term liver disease caused by the hepatitis B virus (HBV) infection. Unlike acute hepatitis B, which lasts for a short period of time, CHB refers to an ongoing infection that persists for more than six months. It is characterized by chronic inflammation in the liver, leading to impaired liver function. CHB can range from mild to severe and can have serious health consequences over time, including liver damage and an increased risk of liver cancer. It is estimated that there are approximately 260 million people worldwide living with CHB, and it is a significant global health problem. Treatment options for CHB include antiviral medications that help suppress the virus and manage liver inflammation. It's important to consult with a healthcare professional for personalized advice and treatment options.

Causes and Risk Factors

The pathophysiologic causes of chronic hepatitis B (CHB) are related to the hepatitis B virus (HBV) infection and the subsequent inflammatory response in the liver. The following factors contribute to the development and progression of CHB:

• Virus factor: HBV infection is the primary cause of CHB. Factors such as high viral load, HBsAg positivity, HBeAg positivity, high levels of HBV DNA, HBV genotype, and HBV mutants can influence disease progression.
• Host factor: Various host-related factors affect the course of CHB. The following have a higher risk of developing CHB:
  • Older age.
  • Male gender.
  • Family history of liver cancer.
  • Obesity.
  • Genetic susceptibility.
  • Smoking.
  • Heavy alcohol use.
  • Diabetes.
  • Weakened immune status.
• Liver factor: Liver-related factors play a role in CHB progression. These include:
  • Progressive fibrosis and cirrhosis.
  • Poor liver function.
  • Hepatitis activity.
  • Other liver disease such as hepatitis C virus, non-alcoholic fatty liver disease, and alcoholic hepatitis.

Remember to consult with your healthcare professional for personalized advice regarding your individual situation.

Symptoms

The most common early symptoms of chronic hepatitis B include:

• Fatigue.
• Mild upper abdomen discomfort.
• Loss of appetite.
• Nausea.
• Body aches.

As chronic hepatitis B progresses, additional symptoms may occur, such as:

• Dark urine.
• Jaundice (yellowing of the skin and eyes).
• Easy bruisability and spontaneous bleeding.
• Abdominal swelling.
• Muscle weakness.
• Confusion that may progress to coma.

It's important to note that not everyone with chronic hepatitis B will experience symptoms, especially in the early stages. It's crucial to consult with a healthcare professional for proper diagnosis and management. They can provide personalized advice based on your individual situation.

Diagnosis

To diagnose chronic hepatitis B, doctors commonly perform the following examinations, tests, and procedures:

• History and Physical Exam: The doctor will take a detailed history about symptoms and factors that may be contributing to your condition. A physical exam will be performed to look for discoloration of the skin or eyes, abdominal tenderness or distension and to look for any masses.
• Blood tests: These tests check for the presence of hepatitis B surface antigen (HBsAg) in the blood and measure the viral load (amount of virus) present. They also measure antibody responses to the virus, such as the hepatitis B core antibody (anti-HBc).
• Liver ultrasound: This imaging test uses sound waves to create images of the liver. It can show if there is any scarring or damage to the liver.
• Liver biopsy: In this procedure, a small portion of the liver is removed and tested. It can help determine the extent of liver damage caused by chronic hepatitis B.

It's important to note that these examinations, tests, and procedures should be conducted by healthcare professionals. They will interpret the results and provide appropriate guidance based on individual circumstances.

Treatment Options

The goals of treatment for chronic hepatitis B are to improve survival, prevent disease progression, and enhance the quality of life. To achieve these goals, various treatment options are available:

Medications:

• Nucleoside/nucleotide analogues (NAs): These oral antiviral drugs, such as lamivudine (LAM), adefovir (ADV), entecavir (ETV), and tenofovir (TDF or TAF), inhibit the replication of the hepatitis B virus (HBV) and reduce viral load in the blood.
• Interferon therapy: Pegylated interferon is an injectable medication that boosts the immune response against HBV, leading to viral suppression.
• Multiple investigational therapies are being studied.

Self-care and Health Behavior Changes:

• Vaccination: Ensuring that family members and close contacts are vaccinated against HBV can prevent transmission.
• Avoidance of alcohol and certain medications: Reducing alcohol consumption and avoiding hepatotoxic medications can help protect the liver.
• Condom use with sexual partners if Hepatitis B status unknown.
• Avoid sharing razors, toothbrushes, nail clippers with partners if Hepatitis B status unknown.

These treatments work towards achieving the goals of CHB treatment by:

• Inhibiting HBV replication, reducing viral load, and preventing disease progression.
• Decreasing liver inflammation, fibrosis, and the risk of developing cirrhosis or hepatocellular carcinoma.
• Improving liver function and overall quality of life.

It is important to consult with a healthcare professional for personalized treatment recommendations and to discuss potential side effects or medication dosing adjustments.

Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.