Issue: 2018, Vol. 23, No. 1

Akhmerova S. G., Galimov R. R., Nagaev R. Ya.

DYNAMICS OF SEASONAL INDICATORS OF MORBIDITY OF A HEMORRHAGIC FEVER WITH RENAL SYNDROME IN THE ENDEMIC REGION

Keywords

hemorrhagic fever with renal syndrome, morbidity, seasonality, conditions of infection

Abstarct

Objective is to study the dynamics of seasonal indicators of the incidence of hemorrhagic fever with renal syndrome (HFRS) in an endemic region. Materials and methods. A retrospective analysis of the incidence of HFRS in the Republic of Bashkortostan for 2006-2017 was conducted according to the data of the Center for Hygiene and Epidemiology in the Republic of Bashkortostan. In 2014-2016, a survey was conducted among 1230 patients who were on inpatient treatment for HFRS in the Regional Clinnical Hospital of Infectious Diseases No. 4 in Ufa. In evaluating the results, analytical and statistical research methods were used. Results. In the course of the study, data were obtained on the intraannual dynamics of the incidence of HFRS, both in the Republic of Bashkortostan and in its territories with different incidence rates.In the structure of the seasonal incidence of HFRS there is a decrease in the proportion of disease registration in the summer period (from 50.2% in 2006-2009 to 31.3% in 2014-2017), an increase in the proportion of disease registration in the autumn (from 34.6% up to 42.4%, respectively) and the winter period (from 8.4% to 20.7%, respectively).The intraannual dynamics of morbidity does not depend on the incidence of HFRS, but is related to the expansion of the area of cities, the resettlement of part of urban residents in suburban settlements. In 38.6% of cases, infection occurred in the territory of their own household or on the home territory. When building or relocating to a new house, only 14.2% of respondents were engaged in processing the territory from rodents. Among new settlers who moved to suburban settlements during the last 3 years, the autumn-winter type of infection was registered more often (in 63.3% of cases).Conclusions. Over the past decade, the seasonal dynamics of HFRS has generated a marked autumn-winter rise in morbidity. The increase in the incidence rate in December was 2.2 times higher, in January - 3.3 times.In the territories of the Republic of Bashkortostan, which includes cities and adjacent regions, both summer and au- tumn-winter incidents of morbidity are recorded. For territories located mainly in rural areas, summer-autumn incidents of morbidity are characteristic, with practically zero registration of diseases in winter.

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