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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">10.21055/0370-1069-2024-1-162-167</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-1957</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>Обнаружение видов Rickettsia у грызунов, добытых в северных провинциях Вьетнама в 2020–2022 гг.</article-title><trans-title-group xml:lang="en"><trans-title>Detection of Rickettsia species in rodents collected in the Northern provinces of Vietnam, 2020–2022</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-6012-9622</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Toan</surname><given-names>Van Trinh</given-names></name><name name-style="western" xml:lang="en"><surname>Toan</surname><given-names>Van Trinh</given-names></name></name-alternatives><bio xml:lang="ru"><p>Toan Van Trinh, </p><p>63, Nguyen Van Huyen Street, Hanoi</p></bio><bio xml:lang="en"><p>Toan Van Trinh, </p><p>63, Nguyen Van Huyen Street, Hanoi</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>Cuong</surname><given-names>Viet Vo</given-names></name><name name-style="western" xml:lang="en"><surname>Cuong</surname><given-names>Viet Vo</given-names></name></name-alternatives><bio xml:lang="ru"><p>63, Nguyen Van Huyen Street, Hanoi</p></bio><bio xml:lang="en"><p>63, Nguyen Van Huyen Street, Hanoi</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/0009-0003-2769-2457</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Dat</surname><given-names>Van Nguyen</given-names></name><name name-style="western" xml:lang="en"><surname>Dat</surname><given-names>Van Nguyen</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/0009-0001-6596-3719</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Lan</surname><given-names>Anh Thi Phan</given-names></name><name name-style="western" xml:lang="en"><surname>Lan</surname><given-names>Anh Thi Phan</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-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Tan</surname><given-names>Ngoc Nguyen</given-names></name><name name-style="western" xml:lang="en"><surname>Tan</surname><given-names>Ngoc Nguyen</given-names></name></name-alternatives><bio xml:lang="ru"><p>63, Nguyen Van Huyen Street, Hanoi</p></bio><bio xml:lang="en"><p>63, Nguyen Van Huyen Street, Hanoi</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/0000-0002-8622-9935</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Hung</surname><given-names>Viet Pham</given-names></name><name name-style="western" xml:lang="en"><surname>Hung</surname><given-names>Viet Pham</given-names></name></name-alternatives><bio xml:lang="ru"><p>63, Nguyen Van Huyen Street, Hanoi</p></bio><bio xml:lang="en"><p>63, Nguyen Van Huyen Street, Hanoi</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/0000-0002-5927-9857</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Lan</surname><given-names>Anh Thi Le</given-names></name><name name-style="western" xml:lang="en"><surname>Lan</surname><given-names>Anh Thi Le</given-names></name></name-alternatives><bio xml:lang="ru"><p>63, Nguyen Van Huyen Street, Hanoi</p></bio><bio xml:lang="en"><p>63, Nguyen Van Huyen Street, Hanoi</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт тропической медицины Совместного Вьетнамско-Российского Тропического научно-исследовательского и технологического центра<country>Россия</country></aff><aff xml:lang="en">Institute of Tropical Medicine, Joint Vietnam-Russia Tropical Science and Technology Research Center<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Национальный институт маляриологии, паразитологии и энтомологии<country>Россия</country></aff><aff xml:lang="en">National Institute of Malariology Parasitology and Entomology<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Ханойский университет науки Вьетнамского национального университета<country>Россия</country></aff><aff xml:lang="en">VNU Hanoi University of Science<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>04</day><month>04</month><year>2024</year></pub-date><volume>0</volume><issue>1</issue><fpage>162</fpage><lpage>167</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Toan V., Cuong V., Dat V., Lan A., Tan N., Hung V., Lan A., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Toan V., Cuong V., Dat V., Lan A., Tan N., Hung V., Lan A.</copyright-holder><copyright-holder xml:lang="en">Toan V., Cuong V., Dat V., Lan A., Tan N., Hung V., Lan A.</copyright-holder><license 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/1957">https://journal.microbe.ru/jour/article/view/1957</self-uri><abstract><p>Риккетсии, являющиеся облигатными внутриклеточными бактериальными паразитами, имеют жизненный цикл, как правило, связанный с членистоногими переносчиками и животными-хозяевами. Грызуны считаются их естественными резервуарами-хозяевами и играют определенную роль в передаче бактерий человеку через членистоногих-переносчиков. Истинные масштабы риккетсиозных инфекций во Вьетнаме остаются недооцененными из-за ограниченного понимания эпидемиологии заболевания, что приводит к значительным нагрузкам на общественное здравоохранение.</p><p>Цель исследования состояла в оценке распространенности риккетсий у диких грызунов в провинциях Дьенбьен, Шонла и Футхо Северного Вьетнама в период с 2020 по 2022 г.</p><sec><title>Материалы и методы</title><p>Материалы и методы. Всего в 2020–2022 гг. в северных провинциях Вьетнама добыто 396 диких грызунов. Полимеразная цепная реакция в реальном времени (ПЦР) использовалась для определения доли образцов, содержащих риккетсии. В дальнейшем гены ompB и 17kDa были извлечены, амплифицированы и секвенированы.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Среди 396 исследованных грызунов большинство относились к виду Rattus norvegicus (56,1 %), на втором месте вид R. tanezumi (37,4 %), затем R. nitidus (2,5 %) и R. germaini (1,8 %). Остальные грызуны относились к видам R. korodentsensis и R. argentiverter, что составляло 2,2 % от общего числа. ПЦР-анализ в реальном времени показал, что 27 образцов крови от 396 добытых грызунов дали положительный результат на риккетсии (6,81 %). Обнаружено, что R. germaini имеет самый высокий показатель положительных результатов – 1/8 (12,5 %), за ним следуют R. nitidus – 1/10 (10,0 %), R. tanezumi – 14/149 (9,5 %) и R. norvegicus – 11/222 (4,9 %). Других возбудителей, переносимых клещами, ни в одной из провинций не выявлено. Секвенирование положительных образцов по генам ompB и 17kDa выявило наиболее близкое родство с R. felis. Эти данные подчеркивают потенциально высокий риск инфицирования R. felis для людей и животных, находящихся на исследуемых территориях.</p></sec></abstract><trans-abstract xml:lang="en"><p>Rickettsiae, which are obligate intracellular bacterial parasites, have a life cycle commonly associated with arthropod vectors and animal hosts. Rodents are recognized as their natural reservoir hosts and play a role in transmitting the bacteria to humans through arthropod vectors. The true extent of rickettsial infections in Vietnam remains underestimated due to a limited understanding of the disease’s epidemiology, resulting in a significant public health burden.</p><p>The aim of this investigation was to assess the prevalence of Rickettsia in wild-living rodents in Dien Bien, Son La, and Phu Tho provinces of Northern Vietnam between 2020 and 2022.</p><sec><title>Materials and methods</title><p>Materials and methods. A total of 396 wild-living rodents were collected from the Northern provinces of Vietnam during 2020–2022. Real-time polymerase chain reaction (PCR) was employed to detect the percentage of Rickettsia-positive specimens. Subsequently, the ompB and 17kDa genes were extracted, amplified, and sequenced from the Rickettsia-positive rodents.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. Among the 396 rodents examined, the majority were Rattus norvegicus (56.1%), followed by R. tanezumi (37.4%), R. nitidus (2.5%), and R. germaini (1.8%). R. korodentsensis and R. argentiverter constituted the remaining rodents, accounting for 2.2% of the total. The real-time PCR analysis revealed that 27 blood samples out of the 396 rodent samples collected, tested positive for Rickettsia (6.81%). R. germaini was shown to have the highest positive rate 1/8 (12.5%), followed by R. nitidus 1/10 (10.0%), R. tanezumi 14/149 (9.5%), and R. norvegicus 11/222 (4.9%). No other tick-borne pathogens were detected in any of the provinces. Sequencing of the positive samples as regards the ompB and 17kDa genes revealed the closest relation to R. felis. These findings highlight the potentially high risk of R. felis infection in humans and animals within the studied areas.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>риккетсиозные инфекции</kwd><kwd>эпидемиология</kwd><kwd>Rickettsia felis</kwd><kwd>северные горные провинции Вьетнама</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rickettsial diseases</kwd><kwd>epidemiology</kwd><kwd>Rickettsia felis</kwd><kwd>Northern mountainous provinces of Vietnam</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Авторы выражают благодарность за техническую помощь сотрудникам Лаборатории по исследованию токсичности и тропических болезней Института тропической медицины Совместного Вьетнамско-Российского Тропического научно-исследовательского и технологического центра.</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">Trung N.V., Hoi L.T., Hoa T.M., Huong D.T., Huyen M.T., Tien V.Q., Mai D.T.T., Ha N.T.T., Kinh N.V., Farris C.M., Richards A.L. 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