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[Incidence of meningococcal infection in the RSFSR]
Abstract:
The authors present characteristics of meningococcus infection epidemic process in case of sporadic cases and under epidemic conditions (1965--1976). A scheme of epidemiological analysis suggested by the authors permitted to differentiate and to record the incidence of various clinical forms of meningococcus infection, to present data on the age, seasonal characteristics, focality, etc. Comparison of intensive morbidity indices for 10 years, both at the individual administration territories and in the Republic as a whole demonstrated morbidity level of 1.5--2.0 to be one of prognostic signs of the beginning epidemic. The main features differentiating the sporadic and epidemic morbidity periods were revealed. The presence of group diseases, a greater percentage of children among those who fell ill, and marked signs of seasonality and territorial difference characterized the period of rise caused by meningococcus of serological group A.
Insights
Meningococcus infection (meningitis) outbreaks show distinct patterns during sporadic and epidemic periods. A morbidity index of 1.5-2.0 can signal an impending epidemic, particularly when linked to serological group A strains.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Meningococcus infection poses significant public health challenges, with varying patterns during sporadic and epidemic phases.
- Understanding these patterns is crucial for effective disease surveillance and control.
Purpose of the Study:
- To characterize the epidemic process of meningococcus infection during both sporadic and epidemic conditions between 1965 and 1976.
- To identify prognostic indicators for the onset of meningococcal epidemics.
Main Methods:
- Epidemiological analysis to differentiate clinical forms and record incidence.
- Analysis of age, seasonal, and territorial characteristics of cases.
- Comparison of morbidity indices over a 10-year period.
Main Results:
- A morbidity index of 1.5-2.0 was identified as a prognostic sign for epidemic beginnings.
- Key differences between sporadic and epidemic periods were established.
- The rise of epidemics was associated with serological group A meningococcus, increased group diseases, a higher proportion of affected children, and pronounced seasonality and territorial variations.
Conclusions:
- The study provides insights into the epidemiological dynamics of meningococcus infection.
- Identified prognostic signs and differentiating features can aid in early epidemic detection and response planning.
- Serological group A plays a significant role in epidemic surges.