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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">microbe</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы особо опасных инфекций</journal-title><trans-title-group xml:lang="en"><trans-title>Problems of Particularly Dangerous Infections</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0370-1069</issn><issn pub-type="epub">2658-719X</issn><publisher><publisher-name>Russian Research Anti-Plague Institute “Microbe”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21055/0370-1069-2025-2-102-108</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-2170</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Изучение циркуляции возбудителей лептоспироза в различных регионах Вьетнама</article-title><trans-title-group xml:lang="en"><trans-title>Study of Circulation of Leptospirosis Pathogens in Different Regions of Vietnam</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9828-3277</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Касьян</surname><given-names>Ж. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kas’yan</surname><given-names>Zh. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><email xlink:type="simple">rusrapi@microbe.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5927-9857</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Le Thi</surname><given-names>Lan Anh</given-names></name><name name-style="western" xml:lang="en"><surname>Le Thi</surname><given-names>Lan Anh</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ханой</p></bio><bio xml:lang="en"><p>Hanoi</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0037-3048</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шарова</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Sharova</surname><given-names>I. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3363-765X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Поршаков</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Porshakov</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зырянова</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Zyryanova</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9877-5258</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чумачкова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Chumachkova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7218-2446</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михеева</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikheeva</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5147-7085</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Vo Viet</surname><given-names>Cuong</given-names></name><name name-style="western" xml:lang="en"><surname>Vo Viet</surname><given-names>Cuong</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ханой</p></bio><bio xml:lang="en"><p>Hanoi</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6035-5933</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Luong Thi</surname><given-names>Mo</given-names></name><name name-style="western" xml:lang="en"><surname>Luong Thi</surname><given-names>Mo</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хошимин</p></bio><bio xml:lang="en"><p>Ho Chi Minh City</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8260-4670</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Катышев</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Katyshev</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-7575-653X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Катышев</surname><given-names>С. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Katyshev</surname><given-names>S. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4909-2394</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Краснов</surname><given-names>Я. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Krasnov</surname><given-names>Ya. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1026-2680</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сеничкина</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Senichkina</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул. Университетская, 46</p></bio><bio xml:lang="en"><p>46, Universitetskaya St., Saratov, 410005</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФКУН «Российский научно-исследовательский противочумный институт «Микроб»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Research Anti-Plague Institute “Microbe”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Совместный Российско-Вьетнамский Тропический научно-исследовательский и технологический центр</institution><country>Вьетнам</country></aff><aff xml:lang="en"><institution>Joint Vietnam-Russia Tropical Research and Technology Center</institution><country>Viet Nam</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Южное отделение Совместного Российско-Вьетнамского Тропического научно-исследовательского и технологического центра</institution><country>Вьетнам</country></aff><aff xml:lang="en"><institution>Southern Branch of the Joint Vietnam-Russia Tropical Research and Technology Center</institution><country>Viet Nam</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>04</day><month>07</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>102</fpage><lpage>108</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Касьян Ж.А., Le Thi L., Шарова И.Н., Поршаков А.М., Зырянова А.Г., Чумачкова Е.А., Михеева Е.А., Vo Viet C., Luong Thi M., Катышев А.Д., Катышев С.Д., Краснов Я.М., Сеничкина А.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Касьян Ж.А., Le Thi L., Шарова И.Н., Поршаков А.М., Зырянова А.Г., Чумачкова Е.А., Михеева Е.А., Vo Viet C., Luong Thi M., Катышев А.Д., Катышев С.Д., Краснов Я.М., Сеничкина А.М.</copyright-holder><copyright-holder xml:lang="en">Kas’yan Z.A., Le Thi L., Sharova I.N., Porshakov A.M., Zyryanova A.G., Chumachkova E.A., Mikheeva E.A., Vo Viet C., Luong Thi M., Katyshev A.D., Katyshev S.D., Krasnov Y.M., Senichkina A.M.</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://journal.microbe.ru/jour/article/view/2170">https://journal.microbe.ru/jour/article/view/2170</self-uri><abstract><p>Территория Юго-Восточной Азии, включая Вьетнам, относится к числу неблагополучных в отношении лептоспирозов. Согласно исследованиям 10 % населения Вьетнама инфицировано лептоспирами, но в то же время информация о циркулирующих видах лептоспир и основных носителях инфекции в различных районах Вьетнама ограничена. Цель работы состояла в изучении циркуляции возбудителей лептоспироза в различных провинциях Вьетнама, для чего проведено исследование суспензий органов мелких млекопитающих, а также определен уровень иммунной прослойки населения, проживающего на обследуемых территориях. Материалы и методы. Работу выполняли на базе мобильной лаборатории мониторинга и диагностики, а также лаборатории токсикологии и тропических болезней Института тропической медицины. Молекулярно-генетическими методами (ПЦР и секвенирование) проведено исследование 2790 проб суспензий органов мелких млекопитающих, собранных с 2019 по 2024 г. в 14 провинциях, расположенных в северной, центральной и южной части страны. Дополнительно для оценки напряженности иммунитета к лептоспирам методом ИФА исследовано 576 сывороток крови, полученных от практически здоровых людей в пяти северных провинциях Вьетнама. Результаты и обсуждение. В 282 образцах, полученных от 20 различных видов мелких млекопитающих, методом ПЦР обнаружены маркеры патогенных лептоспир, при этом положительные результаты выявлены в пробах из всех обследуемых провинций. Проведено секвенирование 76 положительных образцов, в результате чего установлена их принадлежность к видам Leptospira interrogans, Leptospira borgpetersenii, Leptospira mayottensis. Специфические антитела класса IgG к лептоспирам обнаружены в 8,0 % случаев. Выявлена группа риска – лица, занятые в сельском хозяйстве. Полученные результаты показывают повсеместное распространение возбудителей лептоспироза во Вьетнаме. Перспективным направлением является районирование территорий страны по интенсивности эпидемических проявлений лептоспироза, определение видового состава циркулирующих лептоспир и основных носителей среди млекопитающих с учетом ландшафтно-географических и социально-экономических условий.</p></abstract><trans-abstract xml:lang="en"><p>The territory of South-East Asia, including Vietnam, is one of the disadvantaged in relation to leptospirosis areas. According to studies, 10 % of the Vietnamese population is infected with Leptospira, but at the same time, information about circulating Leptospira species, the main carriers of infection in various regions of Vietnam, is very limited. The aim of the work was to investigate the circulation of leptospirosis pathogens in various provinces of Vietnam, for which a study of suspensions of small mammalian organs was conducted, and the level of the immune stratum of the population living in the surveyed territories was determined. Materials and methods. The work was carried out on the base of the mobile laboratory for monitoring and diagnostics, as well as the Laboratory of Toxicology and Tropical Diseases of the Institute of Tropical Medicine. Molecular-genetic methods (PCR and sequencing) were used to study 2,790 samples of suspensions of small mammalian organs collected in 14 provinces located in the northern, central and southern parts of the country between 2019 and 2024. Additionally, 576 sera from conditionally healthy people, obtained in 5 northern provinces of Vietnam, were studied by ELISA to assess the intensity of immunity to Leptospira. Markers of pathogenic Leptospira were detected in 282 samples from 20 different species of small mammals using PCR, while positive results were obtained in samples from all the provinces studied. 76 positive samples were sequenced, as a result of which appurtenance to the species Leptospira interrogans, Leptospira borgpetersenii, Leptospira mayottensis was established. Specific IgG class antibodies to Leptospira were detected in 8.0 % of the cases. A risk group has been identified – people employed in agriculture. The results obtained show the ubiquitous spread of leptospirosis pathogens in Vietnam. A promising field of research is the zoning of the country’s territories according to the intensity of epidemic manifestations of leptospirosis, the determination of the species composition of circulating Leptospira and the main carriers among mammals, taking into account the landscape, geographical and socio-economic factors.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лептоспироз</kwd><kwd>патогенные виды лептоспир</kwd><kwd>эпизоотологический мониторинг</kwd><kwd>мелкие млекопитающие</kwd><kwd>иммунная прослойка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>leptospirosis</kwd><kwd>pathogenic species of Leptospira</kwd><kwd>epizootiological monitoring</kwd><kwd>small mammals</kwd><kwd>immune stratum</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Соболева Г.Л., Ананьина Ю.В., Непоклонова И.В. Актуальные вопросы лептоспироза людей и животных. 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