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[Familial clustering case of hepatitis delta]
1Department of Pediatrics, St. Marianna University School of Medicine, Kawasaki, Japan.
Summary
This study found hepatitis delta virus (HDV) infection within a family, with three members testing positive for HDV markers and Japanese M genotype via PCR. All family members showed past hepatitis B virus (HBV) infection.
Area of Science:
- Hepatology
- Virology
- Infectious Diseases
Background:
- Hepatitis delta is a significant cause of severe liver disease, requiring a coinfection with the hepatitis B virus.
- Familial clustering of infectious diseases can provide insights into transmission dynamics and host susceptibility.
- Understanding hepatitis delta virus (HDV) genotypes is crucial for epidemiological studies and treatment strategies.
Observation:
- A family with a history of hepatitis B virus (HBV) infection was investigated for hepatitis delta.
- Three out of the investigated family members presented with positive serological markers for HDV.
- Polymerase chain reaction (PCR) assays were employed to detect HDV antigen and determine genotypes.
Findings:
- PCR analysis confirmed the presence of HDV in three family members.
- Further genotyping using type-specific primers identified the Japanese M genotype in these three positive cases.
- One family member tested negative for all investigated HDV markers and PCR assays.
Implications:
- This familial clustering suggests potential intrafamilial transmission of HDV.
- The prevalence of the Japanese M genotype in this cluster warrants further epidemiological investigation.
- Identifying HDV infection in HBV-infected families highlights the importance of screening at-risk populations.