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[Meningitis and encephalitis in 1997]
1Zakład Epidemiologii Państwowego, Zakładu Higieny, Warszawa.
Abstract:
In 1997, 4,409 cases of meningitis and 632 cases of encephalitis were reported in Poland. Meningitis incidence rate was 11.4 per 100,000, and was 3-times lower than in 1996. The etiology of meningitis cases was as follows: 2,713 (61.5%) were due to viral agents (ECHO 30 dominated), 1,351 (30.7%) were caused by bacterial agents: 144 meningococcal (3.3%) and 1,207 other bacterial. The bacterial etiology was following: 33.2% were due to Streptococcus pneumoniae, 27.6% were cased by Haemophilus influenzae type b, and 11.6% by Staphylococci. Encephalitis incidence rate was 1.6 per 100,000. There were 201 cases of tick-borne encephalitis, found mainly in endemic areas of Białystok and Suwałki voivodeships.
Insights
In Poland, 1997 saw a significant decrease in meningitis cases, with viral agents like ECHO 30 being the most common cause. Bacterial meningitis, primarily from Streptococcus pneumoniae and Haemophilus influenzae type b, also decreased.
Area of Science:
- Epidemiology
- Infectious Diseases
Context:
- Meningitis and encephalitis pose significant public health challenges globally.
- Understanding the etiological agents and incidence rates is crucial for effective disease control and prevention strategies.
Purpose:
- To analyze the incidence rates and etiological profiles of meningitis and encephalitis cases reported in Poland in 1997.
- To compare the 1997 meningitis incidence with the previous year and identify dominant causative agents.
Summary:
- In 1997, Poland reported 4,409 meningitis cases (incidence 11.4/100,000), a threefold decrease from 1996. Viral agents, notably ECHO 30, accounted for 61.5%, while bacterial agents (30.7%) included Streptococcus pneumoniae (33.2%) and Haemophilus influenzae type b (27.6%). Encephalitis incidence was 1.6/100,000, with 201 cases of tick-borne encephalitis primarily in endemic regions.
- The study highlights a decline in meningitis cases, with a shift towards viral etiologies, though bacterial meningitis remains a concern, particularly with Streptococcus pneumoniae and Haemophilus influenzae type b.
- Tick-borne encephalitis cases were concentrated in specific endemic areas, indicating the importance of geographical surveillance.
Impact:
- Provides crucial epidemiological data on meningitis and encephalitis in Poland for public health planning.
- Informs targeted vaccination and prevention campaigns, especially for bacterial meningitis and tick-borne encephalitis.
- Contributes to the understanding of infectious disease trends and the impact of control measures.