Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation

Subject of study. Examining an impact of the contemporary climatic changes on the natural CCHF focus as well as CCHF incidence in the South of the European part of the Russian Federation. Materials and methods. Annual Epidemiological Report on CCHF Incidence provided by Departments of the Russian Fe...

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Autores principales:	A. N. Kulichenko, D. A. Prislegina
Formato:	article
Lenguaje:	RU
Publicado:	Sankt-Peterburg : NIIÈM imeni Pastera 2019
Materias:	crimean-congo hemorrhagic fever (cchf) climatic changes life cycle of hyalomma marginatum ticks morbidity Infectious and parasitic diseases RC109-216
Acceso en línea:	https://doaj.org/article/2fb5a0e091d34955b7fa9aaaec5a01ed
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spelling	oai:doaj.org-article:2fb5a0e091d34955b7fa9aaaec5a01ed2021-11-22T07:09:52ZClimatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation2220-76192313-739810.15789/2220-7619-2019-1-162-172https://doaj.org/article/2fb5a0e091d34955b7fa9aaaec5a01ed2019-05-01T00:00:00Zhttps://www.iimmun.ru/iimm/article/view/625https://doaj.org/toc/2220-7619https://doaj.org/toc/2313-7398Subject of study. Examining an impact of the contemporary climatic changes on the natural CCHF focus as well as CCHF incidence in the South of the European part of the Russian Federation. Materials and methods. Annual Epidemiological Report on CCHF Incidence provided by Departments of the Russian Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing in the subjects of the Southern and the North-Caucasian Federal Districts, CCHF Epizootologic Monitoring Report on the territory of the Volgograd Region, Rostov Region and Stavropol Region were used in the study. Hydrometeorological data were obtained from the database of the All-Russian Research Institute of Hydrometeorological Information — World Data Center, weather station archives as well as The 2011—2016 National Report on the State of Environment in the Stavropol Region. Results. For the first time, climatic factors affecting each phase of the life cycle of ixodid tick Hyalomma marginatum which is the main CCHF virus vector in the South of the European part of the Russian Federation were identified. A direct correlation between seasonal air temperature fluctuations determining ixodid tick count and CCHF incidence was demonstrated. It was found that the average air temperature and accumulated precipitation collectively affect H. marginatum population (e.g., in Stavropol Region). Peak CCHF incidence was demonstrated to correlate with temperature conditions favorable to developing ixodid ticks. In contrast, air temperature fluctuations were noted to negatively impact in the years preceding decreased CCHF incidence. A relation between CCHF incidence and degree of wetting during preceding spring-and-summer as well as autumn seasons affecting vital activity, metamorphosis in preimaginal stages and count of the next-generation H. marginatum was revealed. Moreover, CCHF virus tended to expand geographic range northwards due to an effects of climatic changes. Virus-carrying Ixodidae found on the territory of the administrative districts of the Volgograd Region adjacent to the Volga Federal District evidence about a risk of CCHF virus spreading outside the Southern Regions of the Russian Federation.A. N. KulichenkoD. A. PrisleginaSankt-Peterburg : NIIÈM imeni Pasteraarticlecrimean-congo hemorrhagic fever (cchf)climatic changeslife cycle of hyalomma marginatum ticksmorbidityInfectious and parasitic diseasesRC109-216RUInfekciâ i Immunitet, Vol 9, Iss 1, Pp 162-172 (2019)
institution	DOAJ
collection	DOAJ
language	RU
topic	crimean-congo hemorrhagic fever (cchf) climatic changes life cycle of hyalomma marginatum ticks morbidity Infectious and parasitic diseases RC109-216
spellingShingle	crimean-congo hemorrhagic fever (cchf) climatic changes life cycle of hyalomma marginatum ticks morbidity Infectious and parasitic diseases RC109-216 A. N. Kulichenko D. A. Prislegina Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation
description	Subject of study. Examining an impact of the contemporary climatic changes on the natural CCHF focus as well as CCHF incidence in the South of the European part of the Russian Federation. Materials and methods. Annual Epidemiological Report on CCHF Incidence provided by Departments of the Russian Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing in the subjects of the Southern and the North-Caucasian Federal Districts, CCHF Epizootologic Monitoring Report on the territory of the Volgograd Region, Rostov Region and Stavropol Region were used in the study. Hydrometeorological data were obtained from the database of the All-Russian Research Institute of Hydrometeorological Information — World Data Center, weather station archives as well as The 2011—2016 National Report on the State of Environment in the Stavropol Region. Results. For the first time, climatic factors affecting each phase of the life cycle of ixodid tick Hyalomma marginatum which is the main CCHF virus vector in the South of the European part of the Russian Federation were identified. A direct correlation between seasonal air temperature fluctuations determining ixodid tick count and CCHF incidence was demonstrated. It was found that the average air temperature and accumulated precipitation collectively affect H. marginatum population (e.g., in Stavropol Region). Peak CCHF incidence was demonstrated to correlate with temperature conditions favorable to developing ixodid ticks. In contrast, air temperature fluctuations were noted to negatively impact in the years preceding decreased CCHF incidence. A relation between CCHF incidence and degree of wetting during preceding spring-and-summer as well as autumn seasons affecting vital activity, metamorphosis in preimaginal stages and count of the next-generation H. marginatum was revealed. Moreover, CCHF virus tended to expand geographic range northwards due to an effects of climatic changes. Virus-carrying Ixodidae found on the territory of the administrative districts of the Volgograd Region adjacent to the Volga Federal District evidence about a risk of CCHF virus spreading outside the Southern Regions of the Russian Federation.
format	article
author	A. N. Kulichenko D. A. Prislegina
author_facet	A. N. Kulichenko D. A. Prislegina
author_sort	A. N. Kulichenko
title	Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation
title_short	Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation
title_full	Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation
title_fullStr	Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation
title_full_unstemmed	Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation
title_sort	climatic prerequisites for changing activity in the natural crimean-congo hemorrhagic fever focus in the south of the russian federation
publisher	Sankt-Peterburg : NIIÈM imeni Pastera
publishDate	2019
url	https://doaj.org/article/2fb5a0e091d34955b7fa9aaaec5a01ed
work_keys_str_mv	AT ankulichenko climaticprerequisitesforchangingactivityinthenaturalcrimeancongohemorrhagicfeverfocusinthesouthoftherussianfederation AT daprislegina climaticprerequisitesforchangingactivityinthenaturalcrimeancongohemorrhagicfeverfocusinthesouthoftherussianfederation
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Climatic prerequisites for changing activity in the natural Crimean-Congo hemorrhagic fever focus in the South of the Russian Federation

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