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Updated: Aug 30, 2026

Separation of Immune Cell Subpopulations in Peripheral Blood Samples from Children with Infectious Mononucleosis
Published on: September 7, 2022
[Chronic infectious mononucleosis]
Snezana Brkić1, Jovana Jovanović, Tomislav Preveden
1Klinika za infektivne bolesti, Klinicki centar, Novi Sad. tomkis@Eunet.yu
Introduction:
Chronic infectious mononucleosis is a clinical entity recognized 15 years ago with clearly defined serological criteria: high titres of IgG Epstein-Barr virus (EBV) virus capsid antigen (VCA), IgG EBV early antigen without IgG Epstein-Barr nuclear antigen (EBNA) antibodies.
Material And Methods:
This follow-up study lasted for 2 years and included 100 acute infectious mononucleosis patients who were investigated every 6 months. Apart from physical examination we evaluated history, complete blood count and liver function together with 5 commercial ELISA tests: IgM EBV VCA, IgG EBV VCA, IgG EB NA, IgG EBV EA and IgA EBV EA.
Results:
Although malaise and fatigue with cervical lymphoadenopathy were the most frequent symptoms, their statistical significance was most established. All laboratory analyses were completely normal during the follow-up period, but there were four patients with acute hepatitis due to hepatitis A virus and adenoviruses. After 6 months of acute illness, two patients without IgG EB NA antibodies who were candidates for chronic disease, presented no other serological findings for chronic disease. It was confirmed that they had delayed serological response due to EBV infection, because one year later they had a completely normal immune status on EBV infection.
Conclusion:
Chronic infectious mononucleosis seems to be an extraordinary event after acute disease. This conclusion corresponds with literature reports of sporadic cases of this disease.
Insights
Chronic infectious mononucleosis is rare after acute Epstein-Barr virus (EBV) infection. Most patients recover fully, with only a few showing delayed serological responses that normalize over time.
Area of Science:
- Virology
- Immunology
- Infectious Diseases
Context:
- Chronic infectious mononucleosis (CIM) is a recognized clinical entity.
- Established serological criteria for CIM include high IgG Epstein-Barr virus (EBV) VCA and IgG EBV EA, without IgG EBNA antibodies.
Purpose:
- To investigate the incidence of chronic infectious mononucleosis after acute EBV infection.
- To evaluate serological responses and clinical outcomes in patients with acute infectious mononucleosis over a 2-year period.
Summary:
- A 2-year follow-up study of 100 acute infectious mononucleosis patients found no cases of chronic disease.
- Laboratory analyses remained normal, with transient delayed serological responses observed in two patients, which normalized within a year.
- Hepatitis A and adenoviruses were noted in four patients, unrelated to EBV chronicity.
Impact:
- Findings suggest chronic infectious mononucleosis is an extraordinary event following acute EBV infection.
- This study supports existing literature on the rarity of CIM, reinforcing the generally favorable prognosis of acute infectious mononucleosis.
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