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[Antigenic variant of ECHO 14, the causative agent of acute serous meningitis]
Abstract:
The study covered 184 children with aseptic meningitis and 248 healthy subjects as controls. The etiological role of 3 enterovirus serotypes: ECHO-14, ECHO-6, and Coxsackie A9 in the development of the diseases in Leningrad in 1974 was substantiated. The antigenic variant ECHO-14 with the "Prime" characteristics was first detected and documented as the causative agent of acute aseptic meningitis. A direct correlation between the predominant strains and the levels of immunity to them in the population was demonstrated. The appearance of a new causative agent and the lack of immunity to it are discussed as possible reasons for the increase in the incidence.
Insights
This study identified ECHO-14 enterovirus as a key cause of aseptic meningitis in Leningrad children in 1974. A lack of population immunity to this new strain likely contributed to increased disease incidence.
Area of Science:
- Virology
- Epidemiology
- Pediatrics
Background:
- Aseptic meningitis is a significant pediatric health concern.
- Enteroviruses are common causes of viral meningitis.
- Understanding etiological agents is crucial for public health interventions.
Purpose of the Study:
- To identify the specific enterovirus serotypes responsible for aseptic meningitis in Leningrad during 1974.
- To investigate the relationship between enterovirus strains and population immunity levels.
- To explore factors contributing to disease incidence increases.
Main Methods:
- Case-control study comparing 184 children with aseptic meningitis to 248 healthy controls.
- Serological analysis to identify enterovirus serotypes (ECHO-14, ECHO-6, Coxsackie A9).
- Correlation analysis between predominant viral strains and population immunity.
Main Results:
- ECHO-14, ECHO-6, and Coxsackie A9 enteroviruses were substantiated as etiological agents.
- A novel antigenic variant of ECHO-14, designated "Prime," was identified as a cause of acute aseptic meningitis.
- A direct correlation was observed between dominant enterovirus strains and existing population immunity levels.
Conclusions:
- The emergence of a new causative agent, ECHO-14 "Prime," coupled with a lack of pre-existing immunity, is proposed as a reason for the observed increase in aseptic meningitis incidence.
- This finding highlights the importance of monitoring viral evolution and population immunity for disease control.
- The study provides critical etiological data for aseptic meningitis in the Leningrad region during 1974.