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Meningococcal meningitis in CSR: a preepidemic situation?
Abstract:
Meningococcal meningitis has become a problem in many European countries, with epidemics occurring during the past 10-15 years. There have also been outbreaks in some non-European countries. The latest meningococcal meningitis epidemic recorded in the CSR (Czech Socialist Republic) occurred in 1953, with the morbidity reaching 14.8 per 100 000 population. After the mid 1950's there was a gradual decline in morbidity, the lowest value (0.3 per 100 000 population) being reached in 1974. Since 1975 there has been a continual rise in morbidity, the value notified for 1982 was 1.2 per 100 000 population. An analysis of the epidemiological situation in meningococcal meningitis in CSR for the past 30 years was performed. Different indicators of the onset of epidemics were evaluated. Shift in the age distribution of patients was found to be the most valuable sign of changing epidemiological situtation. An attempt was made to prognosticate mathematically its further development. The analysis of the epidemiological data suggests that CSR is in a preepidemic situation. This finding is all the more important because a change has been found in the serogroup and serotype patterns of Neisseria meningitidis strains isolated from cerebrospinal fluid.
Insights
Meningococcal meningitis is rising in the Czech Socialist Republic (CSR), indicating a pre-epidemic situation. A shift in patient age distribution and changes in Neisseria meningitidis strains signal a potential outbreak.
Area of Science:
- Epidemiology
- Microbiology
Background:
- Meningococcal meningitis poses a significant public health concern in Europe, with recurring epidemics.
- The Czech Socialist Republic (CSR) experienced a decline in meningococcal meningitis morbidity after 1953, reaching a low in 1974.
- Since 1975, morbidity rates have shown a consistent upward trend, reaching 1.2 per 100,000 in 1982.
Purpose of the Study:
- To analyze the 30-year epidemiological trends of meningococcal meningitis in the CSR.
- To identify key indicators for predicting the onset of meningococcal meningitis epidemics.
- To assess the current epidemiological status and forecast future trends.
Main Methods:
- Retrospective analysis of epidemiological data spanning 30 years in the CSR.
- Evaluation of various indicators for epidemic onset.
- Mathematical prognostication of disease development.
- Analysis of serogroup and serotype changes in Neisseria meningitidis strains.
Main Results:
- A shift in the age distribution of patients emerged as the most significant indicator of changing epidemiological dynamics.
- Epidemiological data suggests the CSR is currently in a pre-epidemic phase for meningococcal meningitis.
- Alterations in the serogroup and serotype patterns of isolated Neisseria meningitidis strains were observed.
Conclusions:
- The observed shift in age distribution and changes in bacterial strains indicate an evolving epidemiological situation for meningococcal meningitis in the CSR.
- Mathematical modeling suggests a pre-epidemic state, necessitating heightened surveillance and preparedness.
- Understanding these changes is crucial for effective public health interventions against meningococcal meningitis.