Hepatitis B in adolescence and middle-age.

Area of Science:

• Hepatology
• Virology
• Public Health

Background:

• Hepatitis B virus (HBV) infection remains a significant global health concern.
• Hepatitis B surface antigen (HBsAg) is a key serological marker for HBV infection.
• Understanding transmission dynamics is crucial for effective prevention strategies.

Purpose of the Study:

• To analyze trends in HBsAg positivity in serum samples submitted to a reference laboratory.
• To investigate age- and sex-specific patterns of HBV infection.
• To identify potential transmission routes in different demographic groups.

Main Methods:

• Radio-immunoassay (RIA) was used to detect HBsAg in serum samples.
• Data were collected from samples submitted to the Hepatitis Reference Laboratory, Ruchill Hospital, Glasgow.
• Demographic information (age, sex) was analyzed in conjunction with HBsAg results.

Main Results:

• A notable increase in HBsAg-positive samples was observed from 1983 to 1984.
• This increase was primarily driven by acute infections in males across different age groups (<18 and >39 years).
• Infections in younger males (<18) were linked to drug abuse, while older males (>39) showed evidence of sexual transmission.

Conclusions:

• Hepatitis B infection patterns are influenced by age and sex, with distinct transmission routes.
• Males under 18 and over 39 represent key demographic groups for HBV surveillance.
• Women over 39 may be at risk through household transmission, and HBsAg detection in this group often indicates acute infection rather than carriage.