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Infectious mononucleosis: observations on transmission
Abstract:
Epsten-Barr virus oropharyngeal shedding has been demonstrated in infectious mononucleosis patients many months after acute illness and long after the disease hallmarks, atypical lymphocytes and heterophile antibody, have disappeared. Extracellular virus is present more frequently in saliva than in other oropharyngeal samples. Prolonged excretion of EBV in asymptomatic carriers explains the difficulty in tracing case-to-case spread and increased transmissibility in age groups in which salivary exchange is high.
Insights
Epstein-Barr virus (EBV) can be shed in the throat long after infectious mononucleosis symptoms resolve. This prolonged shedding, especially in saliva, contributes to EBV's spread among age groups with high salivary exchange.
Area of Science:
- Virology
- Infectious Diseases
- Immunology
Background:
- Epstein-Barr virus (EBV) is a common human herpesvirus.
- Infectious mononucleosis is a primary EBV infection.
- Oropharyngeal shedding of EBV can persist long after acute illness.
Purpose of the Study:
- To investigate the duration and characteristics of Epstein-Barr virus oropharyngeal shedding.
- To determine the frequency of extracellular EBV in different oropharyngeal samples.
- To understand the implications of prolonged EBV shedding for disease transmission.
Main Methods:
- Analysis of oropharyngeal samples from patients with infectious mononucleosis.
- Detection of Epstein-Barr virus DNA in saliva and other oropharyngeal sites.
- Correlation of viral shedding with clinical and immunological markers.
Main Results:
- Epstein-Barr virus shedding was detected many months after acute infectious mononucleosis.
- Extracellular EBV was found more frequently in saliva compared to other oropharyngeal samples.
- Viral shedding persisted even after the disappearance of atypical lymphocytes and heterophile antibodies.
Conclusions:
- Prolonged oropharyngeal shedding of Epstein-Barr virus occurs in infectious mononucleosis patients.
- Saliva is a significant medium for persistent EBV excretion.
- Asymptomatic EBV carriers contribute to transmission difficulties and increased transmissibility in specific age groups.