Clinical and epidemiological aspects of tick-borne encephalitis and Lyme disease in the Republic of Bashkortostan in the 2000s
- Authors: Ibatullin R.A.1,2, Magzhanov R.V.1, Muftieva R.I.2
-
Affiliations:
- Bashkir State Medical University
- Republican Clinical Hospital n.a. G.G. Kuvatov
- Issue: Vol LVII, No 3 (2025)
- Pages: 247-257
- Section: Original study arcticles
- URL: https://journal-vniispk.ru/1027-4898/article/view/349010
- DOI: https://doi.org/10.17816/nb636745
- EDN: https://elibrary.ru/YKHJYE
- ID: 349010
Cite item
Abstract
BACKGROUND: Tick-borne encephalitis and Lyme disease (Lyme borreliosis) are the most widespread natural focal neuroinfections in the Russian Federation. Significant temporal and territorial fluctuations in disease incidence rates and clinical manifestations necessitate periodic analysis of regional clinical and epidemiological patterns to assess the effectiveness of therapeutic and preventive measures. This study provides the first comprehensive assessment of clinical and epidemiological data on tick-borne encephalitis and Lyme disease cases in the Republic of Bashkortostan at the current stage.
AIM: To evaluate long-term clinical and epidemiological trends of tick-borne encephalitis and Lyme disease in the Republic of Bashkortostan for optimizing medical and preventive care in the region.
METHODS: A retrospective observational study included all patients diagnosed with tick-borne encephalitis and Lyme disease registered in the Republic of Bashkortostan. Clinical and epidemiological data from 1421 cases (782 tick-borne encephalitis and 639 Lyme disease) recorded between 2000–2023 were analyzed. The study examined clinical manifestations of focal tick-borne encephalitis and nervous system involvement in Lyme disease (neuroborreliosis).
RESULTS: In the 21st century, the majority of tick-borne encephalitis cases have been observed in the Southern Urals climatic-geographical area of the Republic of Bashkortostan. The average annual incidence rate of tick-borne encephalitis was 0.9 ± 0.5 cases per 100,000 population, while that of Lyme borreliosis was 0.8 ± 0.4 per 100,000 population. Focal tick-borne encephalitis was reported in 6.0% ± 5.1% of patients in the Republic of Bashkortostan during the 2000s. Magnetic resonance imaging (MRI) in tick-borne encephalitis most frequently revealed focal changes in subcortical structures and thalami. Neuroborreliosis was identified in 5.5% of patients among 200 analyzed cases of acute Lyme borreliosis.
CONCLUSION: The Republic of Bashkortostan represents a region with moderate epidemic risk for tick-borne encephalitis and low epidemic risk for Lyme borreliosis. The clinical presentation of focal tick-borne encephalitis encompasses the full spectrum of neurological syndromes, including the most severe fatal cases. Neuroborreliosis is characterized predominantly by peripheral nervous system involvement symptoms.
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##article.viewOnOriginalSite##About the authors
Robert A. Ibatullin
Bashkir State Medical University; Republican Clinical Hospital n.a. G.G. Kuvatov
Author for correspondence.
Email: robib@ufanet.ru
ORCID iD: 0000-0003-4980-1127
SPIN-code: 9114-8221
MD, Cand. Sci. (Medicine)
Russian Federation, Ufa; UfaRim V. Magzhanov
Bashkir State Medical University
Email: mcjanoff@yandex.ru
ORCID iD: 0000-0003-1246-4833
SPIN-code: 8300-6185
MD, Dr. Sci. (Medicine), Professor
Russian Federation, UfaRegina I. Muftieva
Republican Clinical Hospital n.a. G.G. Kuvatov
Email: ReginaMuftieva13@yandex.ru
ORCID iD: 0009-0006-5848-5903
Russian Federation, Ufa
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