Epidemiological situation on Tick-Borne Rickettsiosis in the Siberian Federal District

Abstract

Siberian tick-borne typhus (STBT) is a disease caused by Rickettsia sibirica, characterized by high indicators and degree of localization of manifestations in separate territories. Between 2009–2016, the total of 10190 STBT human cases was registered in the Siberian Federal District; it makes 80.4 % of the case numbers across the country. Objective of the study was retrospective estimation of dynamics of epidemic STBT manifestations in Siberian Federal District in 2009–2016 for forecasting epidemiological situation development and working out proposals for its stabilization. Materials and methods. Analysis of epidemic status of all the entities of the Siberian Federal District was performed on the basis of the State Statistical Reporting form No 2. Results and conclusions. Through calculation of the confidence interval for long-term annual average STBT values the entities were united in three groups which differ in the morbidity rate level. In territories with high intensity of epidemic process the tendency to further deterioration of epidemic status was observed (Altai and Tuva Republics, Altai Territory) which will negatively affect the incidence rate indicators across the country. To stabilize the situation with STBT manifestation, wider use of nonspecific preventive methods is required, as well as organization of etiotropic antibiotic therapy for persons who had been exposed to tick bites, on the basis of introduction of the test-systems for rickettsia detection at the emergency aid stations. In Altai and Tuva Republics, Altai Territory it is necessary to analyze the tactics of acaricide measures (sites, periods, frequency rate of treatments, acaricide dosages) taking into account the leading role of Dermacentor and Haemaphysalis genera representatives in rickettsia transmission.