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Epstein-Barr virus-associated infectious mononucleosis in Chinese children
Chun Wing Chan1, Alan Kwok Shing Chiang, Kwok Hung Chan
1Department of Pediatrics and Adolescent Medicine, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong SAR, PR China.
Insights
Epstein-Barr virus (EBV)-associated infectious mononucleosis (IM) is common in Hong Kong children, peaking between 2-4 years. While generally mild, hepatitis risk increases with age in childhood IM patients.
Area of Science:
- Pediatric Infectious Diseases
- Virology
- Immunology
Background:
- Epstein-Barr virus (EBV) infection is highly prevalent in Hong Kong children before age 10.
- Clinical characteristics and complications of EBV-associated infectious mononucleosis (IM) in Chinese children remain underreported.
- Understanding age-related differences in childhood IM is crucial for accurate diagnosis and management.
Purpose of the Study:
- To define the clinical presentation and complications of EBV-associated IM in Chinese children.
- To investigate the relationship between age and the clinical features of childhood IM.
Main Methods:
- Retrospective study of 77 Chinese children diagnosed with primary EBV infection (IM).
- Patients were categorized into four age groups: <2, 2-4, 5-9, and 10-15 years.
- Evaluation of clinical, hematologic, and biochemical findings across different age groups.
Main Results:
- EBV-associated IM occurred across all studied age groups, with peak incidence in children aged 2-4 years.
- Common symptoms included fever, tonsillopharyngitis, lymphadenopathy, and hepatosplenomegaly, similar to adult IM.
- Hepatitis occurrence showed a significant association with increasing age (P=0.003).
Conclusions:
- Childhood EBV-associated IM in Hong Kong Chinese children is common, presenting similarly to adults but with age-related variations in complications.
- Marked lymphocytosis with atypical lymphocytes is a consistent hematologic finding.
- The increased incidence of hepatitis with advancing age suggests age-dependent host immune responses to EBV.
Background:
According to seroprevalence studies the majority of children in Hong Kong are infected by Epstein-Barr virus (EBV) before 10 years of age, but the characteristics of EBV-associated infectious mononucleosis (IM) in Chinese children are largely unreported. This study aims at defining the clinical presentation and complications of Chinese childhood IM in relation to age of the children.
Methods:
A retrospective study was performed on 77 consecutive Chinese childhood IM patients who fulfilled the serologic criteria for the diagnosis of primary EBV infection (viral capsid antigen IgM+ viral capsid antigen IgG+ Epstein-Barr nuclear antigen-). The clinical, hematologic and biochemical findings were evaluated among four age groups of <2 years, 2 to 4 years, 5 to 9 years and 10 to 15 years.
Results And Conclusions:
EBV-associated IM occurred at all age groups with a peak incidence at 2 to 4 years, corresponding to the rapid rise in the seroprevalence of EBV in early childhood in the Hong Kong Chinese. The majority of children presented with fever, tonsillopharyngitis, lymphadenopathy and hepatosplenomegaly, similar to the adult IM patients, and recovered without major complications. Marked lymphocytosis with the presence of atypical lymphocytes was a consistent hematologic finding in all age groups. The occurrence of hepatitis showed a clear association with advancing age (P = 0.003). The age-related increase in IM-associated hepatitis may reflect difference in the host immune response against EBV between the infants and older children.
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