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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">sredob</journal-id><journal-title-group><journal-title xml:lang="ru">Здоровье населения и среда обитания – ЗНиСО</journal-title><trans-title-group xml:lang="en"><trans-title>Public Health and Life Environment – PH&amp;LE</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2219-5238</issn><issn pub-type="epub">2619-0788</issn><publisher><publisher-name>ФБУЗ ФЦГиЭ Роспотребнадзора</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35627/2219-5238/2025-33-3-66-72</article-id><article-id custom-type="elpub" pub-id-type="custom">sredob-2565</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭПИДЕМИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>EPIDEMIOLOGY</subject></subj-group></article-categories><title-group><article-title>Условия возможного расширения ареалов основных переносчиков иксодовых клещевых боррелиозов и клещевого энцефалита (на примере Магаданской области и Норвегии)</article-title><trans-title-group xml:lang="en"><trans-title>Conditions for the Potential Northward Expansion of Ranges of the Main Vectors of Lyme Disease and Tick-Borne Encephalitis (Based on the Example of the Magadan Region and Norway)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-1202-5798</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сироткин</surname><given-names>М. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Sirotkin</surname><given-names>M. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Cироткин Михаил Борисович – научный сотрудник лаборатории переносчиков инфекций</p><p>ул. Гамалеи, д. 18, г. Москва, 123098</p></bio><bio xml:lang="en"><p>Mikhail B. Sirotkin, Researcher, Laboratory of Disease Vectors</p><p>18 Gamaleya Street, Moscow, 123098</p></bio><email xlink:type="simple">m.sirotkin87@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный исследовательский центр эпидемиологии и микробиологии имени почетного академика Н.Ф. Гамалеи» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Center for Epidemiology and Microbiology named after Honorary Academician N.F. Gamaleya</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>10</day><month>04</month><year>2025</year></pub-date><volume>33</volume><issue>3</issue><fpage>66</fpage><lpage>72</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сироткин М.Б., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Сироткин М.Б.</copyright-holder><copyright-holder xml:lang="en">Sirotkin M.B.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://zniso.fcgie.ru/jour/article/view/2565">https://zniso.fcgie.ru/jour/article/view/2565</self-uri><abstract><p>Введение. Климатические условия обусловливают распространение основных переносчиков иксодовых клещевых боррелиозов и клещевого энцефалита в Евразии.Цель исследования: оценить условия возможного изменения границ ареалов основных переносчиков иксодовых клещевых боррелиозов и клещевого энцефалита на примерах Магаданской области и западного побережья Норвегии.Материалы и методы. Возможность формирования популяций основных переносчиков иксодовых клещевых боррелиозов (клещевого энцефалита) обусловлена календарной датой встречи особей с прокормителем, от чего в конечном счете зависит, успевают ли яйцекладки и напитавшиеся клещи получить необходимое количество тепла для завершения развития. В этом контексте было предпринято аналитико-теоретическое исследование возможности появления независимых популяций переносчиков в анализируемых регионах. Анализ проводился путем сопоставления в программе Word 10 различных подекадных вариантов временных рамок прокормления клещей и показателей теплообеспеченности поверхности почвенного покрова (позволяющих или не позволяющих набрать термальные константы) в теплый период, когда среднемесячная температура не опускается ниже порогового значения для развития этих фаз (+10 °С).Результаты. В настоящее время появление независимых популяций таежного клеща в Магаданской области маловероятно ввиду невозможности получения значения термальных констант для завершения эмбриогенеза в определенный временной отрезок. Возникновение независимых популяций лесного клеща на западном побережье Норвегии обусловлено возможностью набора термальных констант развития перезимовавшими ранее яйцекладками в необходимый отрезок времени.Заключение. Исходя из значений термальных констант развития основных переносчиков иксодовых клещевых боррелиозов и клещевого энцефалита, представляется возможным предложить научно обоснованный прогноз динамики их ареала в северном направлении в связи с предполагаемыми климатическими изменениями.</p></abstract><trans-abstract xml:lang="en"><p>Introduction: Climatic conditions determine the spread of the main vectors of ixodid tick-borne borreliosis and tickborne encephalitis in Eurasia.Objective: : To assess the conditions of possible changes in the boundaries of the ranges of the main vectors of Lyme disease and tick-borne encephalitis based on the examples of the Magadan Region and the west coast of Norway.Materials and methods: Feasibility of forming populations of the main vectors of ixodid tick-borne borreliosis (tick-borne encephalitis) is determined by the calendar date of the meeting of individuals with the host, which ultimately determines whether the egg-laying and nourished ticks manage to get the necessary amount of heat to complete development. In this context, an analytical and theoretical study was undertaken to establish the potential of emergence of independent vector populations in two regions. The analysis was carried out in Microsoft Word 10 by comparing different ten-day variants of the tick feeding time frames and indicators of the soil surface heat supply (allowing or not allowing thermal constant gains) during the warm period, when the average monthly temperature does not fall below the threshold value for the development of these phases (+10 °C).Results: Currently, the emergence of independent populations of the taiga tick in the Magadan Region is unlikely due to the impossibility of obtaining required values of thermal constants for the completion of embryogenesis in a certain time span. The emergence of independent populations of forest mites on the west coast of Norway is related to the possibility of gaining thermal constants of development by overwintering ovipositors in the required period of time.Conclusion: Given the values of the thermal constants of development of the main vectors of Lyme disease and tickborne encephalitis, it seems possible to propose a science-based forecast of the northward expansion of their range due to expected climate change.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>природные очаги</kwd><kwd>иксодовые клещевые боррелиозы</kwd><kwd>клещевой энцефалит</kwd><kwd>иксодовые клещи</kwd><kwd>метаморфоз</kwd></kwd-group><kwd-group xml:lang="en"><kwd>natural foci</kwd><kwd>Lyme borreliosis</kwd><kwd>tick-borne encephalitis</kwd><kwd>ixodid ticks</kwd><kwd>metamorphosis</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">работа выполнена в рамках государственного задания Минздрава России (121030900383-2).</funding-statement><funding-statement xml:lang="en">This research was carried out within the framework of the state assignment No. 121030900383-2 of the Russian Ministry of Health.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Коренберг Э.И., Помелова В.Г., Осин Н.С. 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