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[Intrafamilial contagion with the hepatitis B virus]
F Giménez Sánchez1, F García García, M C Bernal Zamora
1Servicio de Aparato Digestivo, Hospital Universitario, Granada.
Medicina Clinica
|June 29, 1991
Summary
Hepatitis B virus (HBV) transmission within families is higher in those with chronic liver disease (CLD). High viral replication increases infectivity, underscoring the need for family member investigation and vaccination.
Area of Science:
- Hepatology
- Virology
- Public Health
Background:
- Investigating intrafamilial transmission of Hepatitis B virus (HBV).
- Examining the relationship between HBV transmission, viral replication, and epidemiological factors within families.
Purpose of the Study:
- To evaluate intrafamilial transmission patterns of HBV.
- To identify factors influencing HBV spread among family members.
Main Methods:
- Studied 106 chronic HBV carriers (79 asymptomatic, 27 with CLD) and their relatives (347 and 112, respectively).
- Assessed HBV markers (HBsAg, HBsAc, HBcAc) and HBV DNA in index cases and relatives.
- Conducted a survey on socioeconomic and cultural factors influencing transmission.
Main Results:
- Higher prevalence of HBV markers in relatives of patients with CLD compared to asymptomatic carriers and controls.
- Mother-child transmission was more significant in CLD cases, while other contacts were more infective in asymptomatic carriers.
- HBeAg and DNA-positive carriers demonstrated higher infectivity; socioeconomic factors had minimal influence.
Conclusions:
- Relatives of HBV carriers, especially those with high viral replication, face a significant transmission risk.
- Mandatory investigation and vaccination of relatives of HBV carriers are recommended.
- Understanding transmission dynamics is crucial for public health interventions.