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Does hepatitis B virus prenatal transmission result in postnatal immunoprophylaxis failure?

Yi-Yang Zhu1, Ying-Zi Mao, Wei-Ling Wu

  • 1Center for Prenatal Diagnosis, Department of Obstetrics and Gynecology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical College, Linhai City 317000, China.

Clinical and Vaccine Immunology : CVI
|October 15, 2010
PubMed

Insights

Prenatal hepatitis B virus (HBV) infection is uncommon and rarely causes postnatal immunization failure. Most infants born to HBV-positive mothers respond well to vaccination, indicating prenatal factors are not the primary cause of vaccine failure.

Area of Science:

  • Hepatology
  • Immunology
  • Virology

Background:

  • Postnatal hepatitis B immunization failure in children can be a concern.
  • Prenatal hepatitis B virus (HBV) infection is a potential, though not fully understood, contributing factor.

Purpose of the Study:

  • To investigate the link between prenatal hepatitis B virus (HBV) infection and postnatal immunization failure.
  • To determine if intrauterine HBV infection influences vaccine response in newborns.

Main Methods:

  • Prospective study involving pregnant women positive for hepatitis B surface antigen (HBsAg).
  • Fetal samples collected via amniocentesis or cordocentesis for HBV DNA and serologic marker testing.
  • Neonates received combined HBV immunoprophylaxis and were followed up for 1 year with serologic testing.

Main Results:

  • Prenatal HBV DNA was detected in 16 out of 252 fetuses, with low viral loads.
  • Neonatal serologic markers generally mirrored maternal status.
  • Vaccination response rate was 95%; failure occurred in 6 children born to mothers with high viral loads, but only one had detectable intrauterine HBV DNA.

Conclusions:

  • Intrauterine hepatitis B virus (HBV) antigen and DNA presence are uncommon and do not reliably predict postnatal infection or vaccination failure.
  • Postnatal factors, such as maternal viral load, appear more significant in cases of immunization failure than prenatal infection itself.

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