Epidemic situation on tick-borne encephalitis in regions of Central federal district of Russia

Abstract

Available data of epidemic situation of Tick-borne encephalitis (TBE) in most endemic regions of Central Federal district (CFD) - Kostroma and Yaroslavl regions and new data of TBE-incidence in another regions (Moscow and Tver) over 2008-2018 were analyzed and generalized.

In Kostroma and Yaroslavl regions TBE cases were registered annually, the TBE-incidence were respectively 5.69±0.8 and 1.16±0.2 per 100 thousand of population. In structure of clinical forms - fever forms were prevailed in these regions (>67%), considerable shares of focal forms were detected (14.4 and 17.1%, respectively), exceeding shares of meningeal forms during last years. High percentages of alimentary TBE were detected (8.63±1.37 and 7.78±2.1%, respectively). Cases of mixed infection (TBE + Lyme Borreliosis) were detected in both regions. Single cases of TBE-incidence among vaccinated people mostly in incompleted and disorder vaccination scheme were occurred. Third place of TBE-incidence in CFD ranked Tver region. In three regions were occurred lethal cases of TBE. Most lethality during observation period was detected in Yarosvavl region -5.4±1.75%; (in Kostroma region - 2.16±0.7%), however in last 5 years lethal cases no registered in this region. One lethal case at young vaccinated man, who had incomplete vaccination scheme, was registered in Kostroma region.

Two domestic (autochthonic) cases of TBE were observed in Moscow region, first of almost 50 years. Contamination of TBEV occurred in Pavlovo-Posadskiy area and in Moscow (Western district). Meningeal form of TBE was diagnosed. European subtype of TBE was detected in Moscow region. It's necessary continue thorough diagnostics of cases like TBE and research in regions of CFD for study of TBEV population from nature. Strengthening of preventive measures - acaricide measures, deratization, educational work among population and mass vaccination is needed in endemic of TBE regions.

Keywords:tick-borne encephalitis, epidemic situation, endemicity, mortality, vaccination

For citation: Gerasimov S.G., Smirnova L.V., Razumovskiy S.L., Druzhinina Т.А., Troitskiy V.I. Epidemic situation on tick-borne encephalitis in regions of Central federal district of Russia. Infektsionnye bolezni: novosti, mneniya, obuchenie [Infectious Diseases: News, Opinions, Training]. 2019; 8 (4): 17-23. doi: 10.24411/2305-3496-2019-14002 (in Russian)

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CHIEF EDITOR
Aleksandr V. Gorelov
Academician of the Russian Academy of Sciences, MD, Head of Infection Diseases and Epidemiology Department of the Scientific and Educational Institute of Clinical Medicine named after N.A. Semashko ofRussian University of Medicine, Ministry of Health of the Russian Federation, Professor of the Department of Childhood Diseases, Clinical Institute of Children's Health named after N.F. Filatov, Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Deputy Director for Research, Central Research Institute of Epidemiology, Rospotrebnadzor (Moscow, Russian Federation)

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