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Hepatitis A virus infections in Belgian children
1National Viral Hepatitis Centre, Institute of Hygiene and Epidemiology, Brussels, Belgium.
Infection
|May 1, 1993
Summary
Hepatitis A virus (HAV) infections in children often go unnoticed. This study found HAV immunity prevalence increases with age, reaching 33.9% in 16-20 year olds, with only 10% of infections being clinically recognized.
Area of Science:
- Pediatrics
- Infectious Diseases
- Immunology
Background:
- Hepatitis A virus (HAV) infection in childhood frequently presents without noticeable symptoms.
- Understanding the prevalence of HAV immunity and clinical presentation is crucial for public health strategies.
Purpose of the Study:
- To determine the prevalence of immunity to HAV (anti-HAV IgG) across different age groups in children and teenagers.
- To evaluate the percentages of clinically apparent versus subclinical HAV infections.
- To analyze the age distribution of HAV immunity and infection recognition.
Main Methods:
- A cross-sectional study involving 1,008 participants aged 0-20 years from the Brussels area.
- Random serum collection from a general hospital setting.
- Stratification of participants into six distinct age groups for analysis.
Main Results:
- Overall prevalence of anti-HAV IgG among children and teenagers was 13.4%.
- Prevalence of immunity significantly increased with age, from 4.8% in 1-2 year olds to 33.9% in 16-20 year olds.
- Approximately 10% of HAV infections were clinically recognized across all studied age groups, with variations by age bracket.
Conclusions:
- HAV immunity prevalence rises substantially throughout childhood and adolescence.
- The majority of HAV infections in this pediatric population likely remain subclinical.
- Age-specific data on HAV prevalence and clinical recognition are essential for targeted interventions.