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Updated: Jul 15, 2026

Real-Time Polymerase Chain Reaction-Based Detection and Quantification of Hepatitis B Virus DNA
Published on: December 15, 2023
Hepatitis B e antigen positive mother hepatitis B e antigen long persistence in her non-infected baby
1Department of Neonatology, Maternite Regionale, 10 rue du docteur Heydenreich, 54042 Nancy, France. d.selton@maternite.chu-nancy.fr
Insights
Hepatitis B e antigen (HBeAg) can persist in infants born to carrier mothers up to six months of age. This case study highlights potential origins of this marker in non-infected newborns.
Area of Science:
- Neonatal immunology and virology
- Hepatitis B virus (HBV) infection dynamics
Background:
- Hepatitis B virus (HBV) infection poses risks to newborns from carrier mothers.
- Hepatitis B e antigen (HBeAg) is a marker of HBV replication and infectivity.
Observation:
- A case of a neonate born to an HBV carrier mother was monitored.
- The infant exhibited persistent HBeAg in serum until six months of age.
- No evidence of HBV infection breakthrough was detected in the infant.
Findings:
- Hepatitis B e antigen (HBeAg) can be detected in non-infected infants up to six months.
- The infant tested positive for HBeAg despite no confirmed HBV infection.
- The source of the persistent HBeAg marker in the infant remains undetermined.
Implications:
- This finding challenges current understanding of HBeAg persistence in neonates.
- Further research is needed to elucidate the mechanisms behind HBeAg presence in non-infected infants.
- Clinical management of infants born to HBeAg-positive mothers may require re-evaluation.
Unlabelled:
We report the case of a baby born to a hepatitis B virus (HBV) carrier mother. This infant had a hepatitis B e antigen (HBeAg) in the serum until 6 months of age. Serial sera samples were analysed for HBV markers. No breakthrough of HBV infection was detected. The origin of this HBV marker has been questioned.
Conclusion:
HBeAg can persist at a non-infected baby born to an HBeAg-positive mother up to the age of 6 months.
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