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Tick-borne encephalitis in north-eastern Poland in 1997-2001: a retrospective study
Sambor Grygorczuk1, Dorota Mierzynska, Agnieszka Zdrodowska
1Department of Infectious Diseases, Medical Academy of Bialystok, Dluski Regional Specialist Hospital, Bialystok, Poland.
Scandinavian Journal of Infectious Diseases
|February 18, 2003
Summary
Tick-borne encephalitis remains prevalent in northeastern Poland, affecting 152 patients between 1997-2001. Effective vaccination has significantly reduced cases among forest workers, though diagnosis can be challenging.
Area of Science:
- Epidemiology
- Infectious Diseases
- Neurology
Background:
- Tick-borne encephalitis (TBE) is a significant public health concern in endemic regions.
- Understanding the epidemiology and clinical spectrum of TBE is crucial for effective management and prevention.
Purpose of the Study:
- To characterize the epidemiology and clinical features of tick-borne encephalitis in north-eastern Poland.
- To analyze trends in TBE cases over a five-year period.
Main Methods:
- Retrospective analysis of clinical and epidemiological data.
- Inclusion of patients diagnosed with TBE and hospitalized between 1997 and 2001.
- Examination of symptoms, neurological abnormalities, and laboratory findings.
Main Results:
- 152 TBE cases were diagnosed, with meningoencephalitis being the most common form (59%).
- Headache (84%) and fever (81%) were predominant symptoms, with 90% exhibiting meningeal signs.
- Common neurological findings included abnormal reflexes (49%) and ataxia (24%).
- Laboratory results frequently showed pleocytosis (96%) and elevated cerebrospinal fluid protein (90%).
- Vaccination appears to have reduced TBE incidence among forest workers.
Conclusions:
- Tick-borne encephalitis remains endemic in north-eastern Poland.
- Clinical presentation can vary, sometimes lacking typical meningeal signs or clear laboratory indicators.
- Effective vaccination strategies may be contributing to decreased incidence in high-risk occupational groups.