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Natural history of hepatitis B virus infection in children

M H Chang1

  • 1Department of Paediatrics, College of Medicine, National Taiwan University, Taipei. mhchang@ha.mc.ntu.edu.tw

Journal of Gastroenterology and Hepatology
|August 2, 2000
PubMed

Insights

Hepatitis B virus (HBV) infection in children can lead to chronic liver disease. Spontaneous hepatitis B e antigen (HBeAg) seroconversion increases with age, reducing viral replication and the risk of long-term complications.

Area of Science:

  • Hepatology
  • Virology
  • Pediatrics

Background:

  • Childhood Hepatitis B virus (HBV) infection poses risks for acute, fulminant, or chronic hepatitis, potentially leading to liver cirrhosis and cancer.
  • Infants born to hepatitis B e antigen (HBeAg)-seropositive mothers have a high (approx. 90%) risk of becoming hepatitis B surface antigen (HBsAg) carriers.
  • Chronic HBV infection in children is often asymptomatic, but severe liver disease like cirrhosis and hepatocellular carcinoma can develop insidiously over years.

Purpose of the Study:

  • To analyze the natural history of Hepatitis B virus (HBV) infection in children.
  • To investigate factors influencing HBV infection course and seroconversion rates in pediatric populations.
  • To understand the long-term implications of childhood HBV infection, including the development of liver disease.

Main Methods:

  • Long-term follow-up of pediatric patients with HBV infection.
  • Monitoring of serological markers including HBsAg and HBeAg.
  • Assessment of aminotransferase levels and correlation with viral replication and disease progression.

Main Results:

  • Spontaneous HBeAg seroconversion increases with age, with annual rates of 4-5% in children over 3 years old and <2% in those under 3.
  • Viral replication decreases during HBeAg seroconversion, often preceded by elevated aminotransferases.
  • The annual seroconversion rate for HBsAg is low, at 0.56%.

Conclusions:

  • Age at infection, maternal HBsAg/HBeAg status, host immunity, and HBV strain are key determinants of infection outcome in children.
  • HBeAg seroconversion is an age-dependent process crucial for reducing viral activity and long-term liver damage.
  • Early identification and monitoring are vital for managing childhood HBV infection and preventing severe hepatic sequelae.

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