scholarly journals Epidemiological Situation on Crimean-Congo Hemorrhagic Fever in the Russian Federation in 2019 and Forecast for 2020

2020 ◽  
pp. 14-20
Author(s):  
A. S. Volynkina ◽  
E. S. Kotenev ◽  
O. V. Maletskaya ◽  
O. N. Skudareva ◽  
L. I. Shaposhnikova ◽  
...  
Keyword(s):  
Russian Federation ◽  
Hemorrhagic Fever ◽  
The South ◽  
Natural Focus ◽  
Crimean Congo Hemorrhagic Fever ◽  
Cchf Virus ◽  
European Part Of Russia ◽  
Federal Districts ◽  
The Russian Federation ◽  
Epidemiological Situation

The review presents an analysis of epidemic and epizootic situation of Crimean-Congo hemorrhagic fever in the Russian Federation in 2010–2019, summarizes the results of epizootiological monitoring of the CCHF natural focus territory in the south of European part of Russia. An unfavorable epidemiological situation regarding CCHF is maintained in the Russian Federation. In 2010–2019, 999 CCHF cases were registered in nine regions of Southern and North-Caucasian Federal Districts. In 2019, an increase in the CCHF incidence level in the entities of the SFD and NCFD was observed as compared to 2017–2018. The expansion of the territory with registered epidemic manifestations of CCHF continues. In 2010–2019, the number of imago and pre-imaginal phases of Hyalomma marginatum – the main vector of the CCHF virus in Russia, remained consistently high. High numbers of H. marginatum ticks and their CCHFV infection rates can contribute to the development of an unfavorable epidemiological situation in the south of the Russian Federation with a possible increase in the CCHF incidence in 2020.

scholarly journals Epidemiological Situation of Crimean-Congo Hemorrhagic Fever (CCHF) in the South of Russia in 2010 and Prognosis for the Year of 2011

2011 ◽  
pp. 13-15 ◽  
Author(s):  
N. F. Vasilenko ◽  
O. V. Maletskaya ◽  
Yu. M. Tokhov ◽  
N. G. Varfolomeeva ◽  
O. A. Kireitseva ◽  
...  
Keyword(s):  
Russian Federation ◽  
Hemorrhagic Fever ◽  
The South ◽  
Crimean Congo Hemorrhagic Fever ◽  
Federal Districts ◽  
Stavropol Region ◽  
The Russian Federation ◽  
Epidemiological Situation

Presented are the data on Crimean hemorrhagic fever epidemiological situation and morbidity in the South and North-Caucasian Federal Districts of the Russian Federation in 2010. Epizootic situation in the Stavropol region has been analyzed. The prognosis as regards CHF for the year of 2011 in the territory of the South and North-Caucasian Federal Districts is presented, based on epizootiological monitoring .

scholarly journals Natural-Focal Viral Fevers in the South of the European Part of Russia. Crimean-Congo Hemorrhagic Fever

2021 ◽  
pp. 75-80
Author(s):  
O. V. Maletskaya ◽  
T. V. Taran ◽  
D. A. Prislegina ◽  
V. M. Dubyansky ◽  
A. S. Volynkina ◽  
...  
Keyword(s):  
Health Workers ◽  
Global Climate ◽  
Clinical Manifestations ◽  
Hemorrhagic Fever ◽  
Medical Personnel ◽  
Prevention Measures ◽  
The South ◽  
Natural Focus ◽  
Crimean Congo Hemorrhagic Fever ◽  
Cchf Virus

Objective of the study was to determine the modern epidemiological peculiarities of Crimean-Congo hemorrhagic fever in the south of the Russian Federation.Materials and methods. Data of statistical documentation (epidemiological survey of the infectious disease focus, annual summary reports dated 2010–2019) and epizootiologic monitoring data submitted by the Rospotrebnadzor Administrations and the Centers of Hygiene and Epidemiology in the constituent entities of the Southern and the North Caucasian Federal Districts were used. Descriptive, genetic, analytical methods and retrospective epidemiological analysis were applied.Results and discussion. The СCHF natural focus in the European south of Russia has an area of 815 thousand square kilometers and it is characterized by persistence, expansion of the territory, and circulation of CCHF virus European genotypes. CCHF virus genetic variants form the local overlapping populations. Over the period of 2010–2019 997 CCHF cases were registered. Moderate forms of the disease clinically prevailed (74.2 per cent). Hemorrhagic symptoms were noted in 29.3 % of patients. The lethal outcome of the disease was registered in 31 CCHF patients (3 %). Two cases of nosocomial infection were identified, nine health workers were infected by CCHF pathogen. The expansion of epizootically active territory of the CCHF natural focus is associated with the expansion of the Hyalomma marginatum ticks area northward due to the aridization of the steppes, in part because of global climate change. The stability of the CCHF virus population was noted. The epidemic core of the CCHF natural focus remains on the adjacent territory of the Rostov Region, Stavropol Territory and the Republic of Kalmykia. The higher efficiency of CCHF prevention measures on the territory of the core is stemming from the targetness and intensity of measures, contributing to the early seeking of medical care by patients, their early hospitalization which in its turn influenced the development of clinical manifestations and outcome of the disease, and also made it possible to minimize the CCHF nosocomial infections number, including those among the medical personnel. 

scholarly journals Analysis of Epidemiological Situation on Crimean Hemorrhagic Fever in the Russian Federation in 2020 and Prognosis for 2021

2021 ◽  
pp. 17-22
Author(s):  
A. S. Volynkina ◽  
O. V. Maletskaya ◽  
O. N. Skudareva ◽  
I. V. Tishchenko ◽  
E. I. Vasilenko ◽  
...  
Keyword(s):  
Russian Federation ◽  
Hemorrhagic Fever ◽  
Federal District ◽  
Natural Focus ◽  
Modes Of Transmission ◽  
The North ◽  
The Russian Federation ◽  
The Republic ◽  
Epidemiological Situation

The review presents an analysis of the epidemiological and epizootiological situation on Crimean hemorrhagic fever in the Russian Federation in 2020. During the stated period, 32 CHF cases were registered, which is the minimum indicator since the activation of the natural focus of CHF in 1999. The mortality rate was 3.1 %. The incidence was recorded in the Rostov, Astrakhan Regions, Stavropol Territory, the Republics of Dagestan and Kalmykia. A significant decrease in the incidence of CHF was noted in all entities of the Southern Federal District and the North-Caucasian Federal District. An imported from the Republic of Crimea case of CHF was detected in Moscow. The seasonality of morbidity, occupational, and age composition of CHF patients, modes of transmission, features of the clinical course of the disease in 2020 corresponded to the data of long-term observations. Epizootiological monitoring of the territory of the CHF natural focus showed that the abundance of Hyalomma marginatum adults and the percentage of Ixodidae tick pools positive for the presence of CCHF virus markers corresponded to the average long-term indicators at stationary observation points in 2020 , which indicates the persisting epizootiological disadvantage of the territory of the natural CHF focus in the Russian Federation. The persisting high numbers and infection rate of H. marginatum ticks can contribute to the development of an unfavorable epidemiological situation in the south of the country with a possible increase in the incidence of CHF in the Russian Federation in 2021. 

scholarly journals Effect of the natural and climatic factors on epidemiological situation related to natural focal infections

2021 ◽  
Vol 11 (5) ◽  
pp. 820-836
Author(s):  
D. A. Prislegina ◽  
V. M. Dubyanskiy ◽  
A. E. Platonov ◽  
O. V. Maletskaya
Keyword(s):  
Russian Federation ◽  
Vegetation Index ◽  
Climatic Factors ◽  
Abiotic Factors ◽  
Hemorrhagic Fever ◽  
West Nile Fever ◽  
Crimean Congo Hemorrhagic Fever ◽  
Epidemic Process ◽  
The Russian Federation ◽  
Epidemiological Situation

This article is dedicated to the analysis and generalization of the Russian and foreign research results on natural and climatic factors effect on the intensity of epidemic process manifestations and the natural focal infections pathogens vectors vital activity which are the most widespread in the Russian Federation. Over the past seven years tick-borne infections have been accounting for more than 50 per cent in the natural focal diseases general nosological structure. Among the diseases of this group Lyme borreliosis leads in prevalence and frequency of cases identification. Tick-borne viral encephalitis is still a serious danger for national health. Crimean-Congo hemorrhagic fever epidemiological situation remains unfavorable in the south of the European part of Russia. In addition to the annual patients identification, the demonstrable trend of shifting and expansion of the pathogen’s area in a northerly direction was established. It creates a risk for the spread of the Crimean-Congo hemorrhagic fever virus outside the southern regions of the country. High incidence of the dangerous vector-borne infection — West Nile fever — with the involvement of new subjects in the epidemic process and the emergence of local cases of infection in previously non-endemic territories is registered. Expansion of hemorrhagic fever with renal syndrome natural foci borders, which is the most widespread natural focal zoonosis of viral etiology in the Russian Federation and is the second by the frequency of patients identification after tick-borne infections, is noted. Research data for the dependence of the carriers pathogens number and the dynamics of the natural focal infections incidence on the values of climatic factors, confirmed using various methods of mathematical statistics (time-series analysis, autoregression integrated moving average, logistic regression, correlation analysis, one-way analysis of variance and other) were systematized. It was found that the temperature and humidity of the air and soil, the amount of precipitation, the height of the snow cover are the common abiotic factors for all of investigated infections. The values of these factors can be used for the subsequent epidemiological forecast. The further study of relationship between the incidence rate of the population, the number of arthropod vectors and small mammals with indicators of soil moisture and temperature at different depths, hydrothermal coefficient, normalized relative vegetation index, accumulated values of temperature and precipitation, as well as similar studies on other actual natural focal infections in the Russian Federation will be very promising.

scholarly journals Peculiar Aspects of Epidemiological Situation on Crimean Hemorrhagic Fever in the Russian Federation in 2011

2012 ◽  
pp. 22-25 ◽  
Author(s):  
N. F. Vasilenko ◽  
V. Yu. Smolensky ◽  
A. S. Volynkina ◽  
N. G. Varfolomeeva ◽  
I. N. Zaikina ◽  
...  
Keyword(s):  
Russian Federation ◽  
Hemorrhagic Fever ◽  
Nosocomial Outbreak ◽  
Central Hospital ◽  
The South ◽  
Rostov Region ◽  
The Russian Federation ◽  
Epidemiological Situation

Outlined is the analysis of epidemiological and epizootiological situation on Crimean hemorrhagic fever (CHF) in the south of the Russian Federation in 2011. Discussed are the causes of nosocomial outbreak of CHF at the Salsk district central hospital, the Rostov Region. Prognostication on CHF situation for 2012 is made based on the epizootiological monitoring.

scholarly journals Analysis of Crimean Hemorrhagic Fever Morbidity Rates in the Russian Federation in 2009– 2018 and Forecast for 2019

2019 ◽  
pp. 26-31
Author(s):  
A. S. Volynkina ◽  
N. D. Pakskina ◽  
E. S. Kotenev ◽  
O. V. Maletskaya ◽  
L. I. Shaposhnikova ◽  
...  
Keyword(s):  
Russian Federation ◽  
Hemorrhagic Fever ◽  
Federal District ◽  
Morbidity Rate ◽  
Virus Population ◽  
The Past ◽  
Cchf Virus ◽  
European Part Of Russia ◽  
The Russian Federation

The review presents the analysis of epidemic and epizootic situation on Crimean hemorrhagic fever (CHF)in the Russian Federation in 2009–2018. Over the past decade, 980 CHF cases have been registered in Russia (2,8 %lethal). In 2009–2018, there was a significant expansion of the epidemiologically active area of the natural CHF focus.Epizootiological monitoring of the territory of natural CHF focus showed that in 2009–2018 the number of imago andpreimaginal phases of Hyalomma marginatum – the main vector of the CCHF virus in Russia, remained consistently high.The average long-term rate of Ixodidae ticks infestation by the CCHF virus in 2013–2017 was 3,3 %. In 2009–2018 in the south of the European part of Russia CCHF virus variants belonging to the genetic lines Europe-1 (V), Europe-3 (VII) and Africa-3 (III) were detected. There were no significant changes in the ratio of circulating genetic variants of the virus in the regions of the Russian Federation, which confirms the relative stability of the CCHF virus population. In 2018, CHF morbidity rate in the Russian Federation retained downward trend, however, in some regions of South Federal District the number of CHF cases increased. One of the reasons for CHF morbidity rate decrement in the Russian Federation in 2018 was the well-timed acaricidal treatments of cattle and natural biotopes in most of CHF endemic regions. 

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