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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="review-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">16805</article-id><article-id pub-id-type="doi">10.36233/0507-4088-356</article-id><article-id pub-id-type="edn">agykbe</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>REVIEWS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОБЗОРЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The Mengla virus (<italic>Filoviridae: Dianlovirus</italic>)</article-title><trans-title-group xml:lang="ru"><trans-title>Вирус Менгла (<italic>Filoviridae: Dianlovirus</italic>)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1817-0126</contrib-id><name-alternatives><name xml:lang="en"><surname>Sizikova</surname><given-names>Tatyana E.</given-names></name><name xml:lang="ru"><surname>Сизикова</surname><given-names>Татьяна Евгеньевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, senior researcher</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник </p></bio><email>48cnii@mil.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6552-4599</contrib-id><name-alternatives><name xml:lang="en"><surname>Lebedev</surname><given-names>Vitaliy N.</given-names></name><name xml:lang="ru"><surname>Лебедев</surname><given-names>Виталий Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>DSc, professor, leading researcher</p></bio><bio xml:lang="ru"><p>д-р биол. наук, профессор, ведущий научный сотрудник </p></bio><email>48cnii@mil.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6742-3919</contrib-id><name-alternatives><name xml:lang="en"><surname>Borisevich</surname><given-names>Sergey V.</given-names></name><name xml:lang="ru"><surname>Борисевич</surname><given-names>Сергей Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>DSc, professor, academician of RAS, head of the institute</p></bio><bio xml:lang="ru"><p>д-р биол. наук, профессор, академик РАН, начальник института </p></bio><email>48cnii@mil.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">48 Central Scientific Research Institute of the Ministry of Defens of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ «48 Центральный научно-исследовательский институт» Минобороны России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-03-23" publication-format="electronic"><day>23</day><month>03</month><year>2026</year></pub-date><volume>71</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>7</fpage><lpage>12</lpage><history><date date-type="received" iso-8601-date="2025-09-19"><day>19</day><month>09</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Sizikova T.E., Lebedev V.N., Borisevich S.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Сизикова Т.Е., Лебедев В.Н., Борисевич С.В.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Sizikova T.E., Lebedev V.N., Borisevich S.V.</copyright-holder><copyright-holder xml:lang="ru">Сизикова Т.Е., Лебедев В.Н., Борисевич С.В.</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/16805">https://virusjour.crie.ru/jour/article/view/16805</self-uri><abstract xml:lang="en"><p><bold>Introduction. </bold>Filoviruses associated with various species of pteropodid bats (<italic>Chiroptera: Pteropodidae</italic>) are traditionally regarded as potential causative agents of hemorrhagic fevers with epidemic potential. The known agents of Ebola and Marburg fevers periodically cause sporadic cases and epidemic outbreaks in African countries. Recent discoveries of novel filoviruses associated with pteropodid bats in South and Southeast Asia highlight the necessity to investigate their genetic diversity and pathogenic potential.</p> <p>The <bold>aim </bold>of this study was to investigate the genetic diversity and pathogenic potential of new filoviruses associated with bats, based on literature data.</p> <p><bold>Materials and methods</bold>. This review is based on an analysis of published literature describing the detection and molecular characterization of novel filoviruses identified in different geographic regions, with a particular focus on filoviruses associated with pteropodid bats in South and Southeast Asia. The analyzed studies include data on virus discovery, genome organization, taxonomic classification, and experimental assessment of biological properties. <bold>Results. </bold>Several novel filoviruses have been identified by metagenomic RNA sequencing of tissues from pteropodid bats captured in South and Southeast Asia. Among them, Mengla virus was detected in tissues of pteropodid bats (<italic>Rousettus </italic>spp.) captured in Mengla County, Yunnan Province, People’s Republic of China. Owing to a high level of genetic divergence, Mengla virus was classified as a representative of a new genus, <italic>Dianlovirus</italic>, within the family <italic>Filoviridae</italic>. Although a live isolate of Mengla virus has not yet been obtained, experimental studies using chimeric minigenome systems and virus-like particles suggest that the virus may exhibit tropism for tissues of various vertebrate hosts, including humans.</p> <p><bold>Conclusion. </bold>Members of the family <italic>Filoviridae </italic>are widely distributed within the geographic range of their natural reservoir–pteropodid bats–across South and Southeast Asia, including viruses evolutionarily related to Ebola and Marburg viruses. Although human disease caused by Mengla virus and other recently discovered filoviruses has not been documented, the potential for cross-species transmission and the emergence of novel filovirus infections in endemic regions remains.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение. </bold>Филовирусы, ассоциированные с различными видами крыланов (<italic>Chiroptera: Pteropodidae</italic>), традиционно рассматриваются как потенциальные возбудители геморрагических лихорадок с эпидемическим потенциалом. Возбудители лихорадок Эбола и Марбург периодически вызывают спорадические случаи и эпидемические вспышки в странах Африки. Открытие в последние годы новых филовирусов, связанных с рукокрылыми в Южной и Юго-Восточной Азии, обусловливает необходимость изучения их генетического разнообразия и патогенного потенциала.</p> <p><bold>Цель работы. </bold>Изучение генетического разнообразия и патогенного потенциала новых филовирусов, ассоциированных с рукокрылыми, на основе данных литературы.</p> <p><bold>Материалы и методы. </bold>Обзор основан на анализе публикаций, посвященных выявлению и молекулярной характеристике новых филовирусов, обнаруженных в разных географических регионах, с акцентом на филовирусы, ассоциированные с крыланами, в Южной и Юго-Восточной Азии. Проанализированы сведения об обнаружении вирусов, организации их геномов, таксономической классификации и экспериментальной оценке биологических свойств.</p> <p><bold>Результаты. </bold>В последние годы выявлен ряд новых филовирусов в тканях крыланов, отловленных в разных регионах Южной и Юго-Восточной Азии. Вирус Менгла был обнаружен в тканях печени летучих собак (<italic>Rousettus</italic> spp.), отловленных в округе Менгла провинции Юньнань Китайской Народной Республики. В связи с высоким уровнем генетической дивергенции вирус Менгла отнесен к новому роду <italic>Dianlovirus</italic> в составе семейства <italic>Filoviridae</italic>. Несмотря на отсутствие выделенного живого изолята, экспериментальные исследования с использованием химерных минигеномных систем и вирусоподобных частиц указывают на возможный тропизм вируса Менгла к тканям различных позвоночных животных, включая человека. Заключение. Представители семейства <italic>Filoviridae</italic> широко распространены в пределах ареала их природного резервуара крыланов (семейство <italic>Pteropodidae</italic>) и, возможно, летучих мышей на территории Южной и Юго-Восточной Азии, включая вирусы, эволюционно родственные вирусам Эбола и Марбург. Несмотря на отсутствие документированных случаев заболеваний человека, вызванных вирусом Менгла и другими недавно выявленными филовирусами, сохраняется вероятность межвидовой передачи и возникновения новых филовирусных инфекций в эндемичных регионах.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Mengla virus</kwd><kwd>filoviruses</kwd><kwd>sequencing of nucleic acids</kwd><kwd>sequence of genome</kwd><kwd>bats</kwd><kwd>natural reservoir of filoviruses</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>вирус Менгла</kwd><kwd>филовирус</kwd><kwd>секвенирование нуклеиновых кислот</kwd><kwd>последовательность генома</kwd><kwd>рукокрылые</kwd><kwd>резервуар филовирусов</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Radoshitzky S.R., Bavari S., Jahrling P.B., Cuhn J.H. Filoviruses. In: Carr J.H., ed. Medical Aspects of Biological Warfare. 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