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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Problems of Virology</journal-id><journal-title-group><journal-title xml:lang="en">Problems of Virology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы вирусологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0507-4088</issn><issn publication-format="electronic">2411-2097</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">16816</article-id><article-id pub-id-type="doi">10.36233/0507-4088-350</article-id><article-id pub-id-type="edn">vwfdos</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The first identification of <italic>Orthohantavirus dobravaense</italic>, Kurkino virus (<italic>Hantaviridae</italic>: <italic>Orthohantavirus</italic>) in the Volga Federal District</article-title><trans-title-group xml:lang="ru"><trans-title>Первый случай идентификации <italic>Orthohantavirus dobravaense</italic>, вирус Куркино (<italic>Hantaviridae</italic>: <italic>Orthohantavirus</italic>) на территории Приволжского федерального округа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-4116-0471</contrib-id><name-alternatives><name xml:lang="en"><surname>Nasyrov</surname><given-names>Timur R.</given-names></name><name xml:lang="ru"><surname>Насыров</surname><given-names>Тимур Радикович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>laborant researcher, OpenLab ‘Gene and Cell Technologies’</p></bio><bio xml:lang="ru"><p>лаборант-исследователь НИЛ «OpenLab Генные и клеточные технологии»</p></bio><email>nasyrovtimur1@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-2949-3289</contrib-id><name-alternatives><name xml:lang="en"><surname>Elboeva</surname><given-names>Polina I.</given-names></name><name xml:lang="ru"><surname>Елбоева</surname><given-names>Полина Игоревна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>junior researcher, OpenLab ‘Gene and Cell Technologies’</p></bio><bio xml:lang="ru"><p>младший научный сотрудник НИЛ «OpenLab Генные и клеточные технологии»</p></bio><email>polinaelboeva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1537-3099</contrib-id><name-alternatives><name xml:lang="en"><surname>Martynova</surname><given-names>Ekaterina V.</given-names></name><name xml:lang="ru"><surname>Мартынова</surname><given-names>Екатерина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med.), leading researcher, OpenLab ‘Gene and Cell Technologies’</p></bio><bio xml:lang="ru"><p>канд. мед. наук, ведущий научный сотрудник НИЛ «OpenLab Генные и клеточные технологии»</p></bio><email>ignietferro.venivedivici@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8214-7828</contrib-id><name-alternatives><name xml:lang="en"><surname>Okhlopkova</surname><given-names>Olesia V.</given-names></name><name xml:lang="ru"><surname>Охлопкова</surname><given-names>Олеся Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), senior researcher, Research Institute of Virology</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник</p></bio><email>ohlopkova.lesia@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2536-3604</contrib-id><name-alternatives><name xml:lang="en"><surname>Tyurin</surname><given-names>Yuriy A.</given-names></name><name xml:lang="ru"><surname>Тюрин</surname><given-names>Юрий Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), assistant professor, assistant professor of Department of Biochemistry and Clinical Laboratory Diagnostics</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доцент, доцент кафедры биохимии и клинической лабораторной диагностики</p></bio><email>tyurin.yurii@yandex.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4328-8190</contrib-id><name-alternatives><name xml:lang="en"><surname>Kabwe</surname><given-names>Emmanuel</given-names></name><name xml:lang="ru"><surname>Кабве</surname><given-names>Эммануэль</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), senior researcher, OpenLab ‘Gene and Cell Technologies’</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник НИЛ «OpenLab Генные и клеточные технологии»</p></bio><email>emmanuelkabwe@ymail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4409-2942</contrib-id><name-alternatives><name xml:lang="en"><surname>Davidyuk</surname><given-names>Yuriy N.</given-names></name><name xml:lang="ru"><surname>Давидюк</surname><given-names>Юрий Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), assistant professor, senior researcher, OpenLab ‘Gene and Cell Technologies’</p></bio><bio xml:lang="ru"><p>канд. биол. наук, доцент, старший научный сотрудник НИЛ «OpenLab Генные и клеточные технологии»</p></bio><email>davi.djuk@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Fundamental Medicine and Biology Federal State Autonomous Educational Institution of Higher Education «Kazan (Volga Region) Federal University»</institution></aff><aff><institution xml:lang="ru">Институт фундаментальной медицины и биологии ФГАОУ ВО «Казанский (Приволжский) федеральный университет»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Research Institute of Virology, Federal Research Center for Fundamental and Translational Medicine</institution></aff><aff><institution xml:lang="ru">НИИ вирусологии ФГБНУ «Федеральный исследовательский центр фундаментальной и трансляционной медицины»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Kazan State Medical University of the Ministry of Health of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Казанский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-30" publication-format="electronic"><day>30</day><month>12</month><year>2025</year></pub-date><volume>70</volume><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>570</fpage><lpage>580</lpage><history><date date-type="received" iso-8601-date="2025-10-16"><day>16</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Nasyrov T.R., Elboeva P.I., Martynova E.V., Okhlopkova O.V., Tyurin Y.A., Kabwe E., Davidyuk Y.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Насыров Т.Р., Елбоева П.И., Мартынова Е.В., Охлопкова О.В., Тюрин Ю.А., Кабве Э., Давидюк Ю.Н.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Nasyrov T.R., Elboeva P.I., Martynova E.V., Okhlopkova O.V., Tyurin Y.A., Kabwe E., Davidyuk Y.N.</copyright-holder><copyright-holder xml:lang="ru">Насыров Т.Р., Елбоева П.И., Мартынова Е.В., Охлопкова О.В., Тюрин Ю.А., Кабве Э., Давидюк Ю.Н.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://virusjour.crie.ru/jour/article/view/16816">https://virusjour.crie.ru/jour/article/view/16816</self-uri><abstract xml:lang="en"><p><bold>Introduction. </bold>The Kurkino and Sochi viruses of species <italic>Orthohantavirus dobravaense</italic> (ODOB) are among the pathogens that cause hemorrhagic fever with renal syndrome in the European part of Russia. However, the current literature provides limited data on the distribution of genetic variants of the ODOB in Russia.</p> <p>The <bold>aim</bold> is to identify ODOB in several regions of Volga, Central and Ural Federal districts of the Russian Federation and analyze their genome.</p> <p><bold>Materials and methods</bold>. Total RNA was isolated from lung tissue samples of striped field mouse (<italic>Apodemus agrarius</italic>) and yellow-necked mouse (<italic>A. flavicollis</italic>) captured in a number of areas of the Volga Federal District and neighboring regions in 2015–2023. Orthohantavirus RNA was detected by RT-PCR using specific primers to ODOB. The PCR amplification products were separated in agarose gel, purified, and subjected to Sanger sequencing. Comparative and phylogenetic analyses were performed for the sequenced genome fragments.</p> <p><bold>Results.</bold> Orthohantavirus RNA was detected in one sample of <italic>A. flavicollis</italic> from the Ulyanovsk region. Based on the analysis of the nucleotide sequences of the sequenced PCR products, it was found that the highest values of similarity were obtained when comparing the identified strain with the reference Kurkino virus from the Tula region. The data from the phylogenetic analysis of the sequenced fragment of the S and M segments allowed us to establish that the identified isolate is closely related to the Kurkino virus found earlier in <italic>A. agrarius</italic> in the Tula region. Thus, the detected isolate was identified as variant of Kurkino virus, which is also widespread in the central regions of Russia, Wetern Siberia and close related to genome variants that are distributed in Central Europian countries.</p> <p><bold>Conclusions. </bold>It is proved for the first time that: 1) the range of <italic>Orthohantavirus dobravaense</italic> (Kurkino virus) extends to a part of the territory of the Volga Federal District; 2) <italic>Orthohantavirus dobravaense </italic>(Kurkino virus) and <italic>Orthohantavirus puumalaense</italic> (Puumala virus) are co-circulating in the Ulyanovsk region.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Вирусы Куркино и Сочи – <italic>Orthohantavirus dobravaense </italic>(ODOB), являются одними из возбудителей геморрагической лихорадки с почечным синдромом на европейской части территории России. Однако в настоящее время в литературе приводятся только ограниченные данные о распространении в России генетических вариантов ODOB.</p> <p><bold>Цель</bold> – выявление ODOB на территориях ряда регионов Приволжского (ПФО), Центрального и Уральского федеральных округов РФ и проведение анализа их генома.</p> <p><bold>Материалы и методы.</bold> Общую РНК выделяли из образцов легочной ткани полевых мышей (<italic>Apodemus agrarius</italic>) и желтогорлых мышей (<italic>A. flavicollis)</italic>, отловленных в ряде субъектов ПФО и соседних регионах в 2015–2023 гг. Выявление ортохантавирусной РНК проводили методом полимеразной цепной реакции (ПЦР) с обратной транскрипцией с использованием видоспецифичных праймеров для ODOB. Продукты ПЦР-амплификации разделяли в агарозном геле, очищали и секвенировали по Сэнгеру. Для секвенированных участков генома проводили сравнительный и филогенетический анализ.</p> <p><bold>Результаты.</bold> В одном образце <italic>A. flavicollis</italic> из Ульяновской области была выявлена ортохантавирусная РНК. По результатам анализа нуклеотидных последовательностей секвенированных ПЦР-продуктов было установлено, что наиболее высокие значения идентичности были получены при сравнении выявленного нуклеотидной последовательности РНК-изолята с референсным штаммом ODOB (вирус Куркино из Тульской области). Данные филогенетического анализа секвенированных участков S- и M-сегментов позволили установить, что наиболее близкородственным выявленному РНК-изоляту оказался вирус Куркино, найденный ранее у <italic>A. agrarius</italic> в Тульской области. Таким образом, выявленный изолят был идентифицирован как вариант вируса Куркино, ранее выявленного в центральных областях России и в Западной Сибири, близкородственные которому геноварианты распространены в странах центральной Европы.</p> <p><bold>Выводы.</bold> Впервые доказано, что: 1) ареал <italic>Orthohantavirus dobravaense</italic> (вирус Куркино) распространяется на часть территории ПФО; 2) в Ульяновской области коциркулируют <italic>Orthohantavirus dobravaense</italic> (вирус Куркино) и <italic>Orthohantavirus puumalaense</italic> (вирус Пуумала).</p></trans-abstract><kwd-group xml:lang="en"><kwd>Orthohantavirus dobravaense</kwd><kwd>Kurkino virus</kwd><kwd>HFRS</kwd><kwd>Apodemus flavicollis</kwd><kwd>phylogenetic analysis</kwd><kwd>co-circulation</kwd><kwd>natural reservior</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Orthohantavirus dobravaense</kwd><kwd>вирус Куркино</kwd><kwd>ГЛПС</kwd><kwd>Apodemus flavicollis</kwd><kwd>филогенетический анализ</kwd><kwd>коциркуляция</kwd><kwd>природный резервуар</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap></funding-source><award-id>25-24-00186</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Savitskaya T.A., Ivanova A.V., Zubova A.A., Reshetnikova I.D., Isaeva G.Sh., Trifonov V.A., et al. 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