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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">10.21055/0370-1069-2023-1-142-147</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-1800</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>Типирование некультивируемых изолятов Coxiella burnetii  и Coxiella-подобных микроорганизмов, ассоциированных с клещами, с применением анализа нуклеотидной последовательности гена 16S рРНК</article-title><trans-title-group xml:lang="en"><trans-title>Typing of Uncultured Isolates of Coxiella burnetii and Coxiella-Like Microorganisms Associated with Ticks Using 16S  rRNA Gene Nucleotide Sequence Analysis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5211-5086</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Панферова</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Panferova</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 197101, Санкт-Петербург, ул. Мира, 14</p></bio><bio xml:lang="en"><p>14, Mira St., Saint Petersburg, 197101, Russian Federation</p></bio><email xlink:type="simple">pasteur@pasteurorg.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/0000-0001-6433-3486</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Токаревич</surname><given-names>Н. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Tokarevich</surname><given-names>N. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Токаревич Николай Константинович</p><p>Российская Федерация, 197101, Санкт-Петербург, ул. Мира, 14</p></bio><bio xml:lang="en"><p>Nikolay K. Tokarevich</p><p>14, Mira St., Saint Petersburg, 197101, Russian Federation</p></bio><email xlink:type="simple">pasteur@pasteurorg.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блинова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Blinova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 197101, Санкт-Петербург, ул. Мира, 14</p></bio><bio xml:lang="en"><p>14, Mira St., Saint Petersburg, 197101, Russian Federation</p></bio><email xlink:type="simple">pasteur@pasteurorg.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/0000-0003-3113-6018</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нафеев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nafeev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 432049, Ульяновск, ул. Пушкарева, 5</p></bio><bio xml:lang="en"><p>5, Pushkareva St., Ulyanovsk, 432049, Russian Federation</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сибаева</surname><given-names>Э. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Sibaeva</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 432049, Ульяновск, ул. Пушкарева, 5</p></bio><bio xml:lang="en"><p>5, Pushkareva St., Ulyanovsk, 432049, Russian Federation</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФБУН «Санкт-Петербургский научно-исследовательский институт эпидемиологии и микробиологии имени Пастера»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pasteur St. Petersburg Research Institute of Epidemiology and Microbiology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУ «Центр гигиены и эпидемиологии в Ульяновской области»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Center of Hygiene and Epidemiology in the Ulyanovsk Region</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>03</day><month>05</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>142</fpage><lpage>147</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Панферова Ю.А., Токаревич Н.К., Блинова О.В., Нафеев А.А., Сибаева Э.И., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Панферова Ю.А., Токаревич Н.К., Блинова О.В., Нафеев А.А., Сибаева Э.И.</copyright-holder><copyright-holder xml:lang="en">Panferova Y.A., Tokarevich N.K., Blinova O.V., Nafeev A.A., Sibaeva E.I.</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/1800">https://journal.microbe.ru/jour/article/view/1800</self-uri><abstract><p>Возбудитель Ку-лихорадки – внутриклеточный патоген Coxiella burnetii – распространен практически по всему миру; в его циркуляции участвует множество видов кровососущих клещей, опасных для животных и человека. С помощью молекулярно-генетических методов обнаружены близкородственные виды микроорганизмов рода Coxiella sp., ряд которых является эндосимбионтами клещей, а некоторые могут выживать в организме человека, вызывая инфекционный процесс. Существование видов, гены которых по нуклеотидной последовательности сходны с генами C. burnetii, затрудняет генодиагностику патогена у членистоногих переносчиков. Цель данной работы – изучение возможности применения ПЦР для молекулярной диагностики и секвенирования протяженного фрагмента гена 16S рРНК для дифференциации C. burnetii от Coxiella-подобных микроорганизмов. Материалы и методы. Индивидуальные пробы кровососущих клещей исследовали для обнаружения бактерий рода Coxiella sp. с помощью стандартной ПЦР. Для положительных образцов получали протяженные фрагменты гена 16S рРНК и исследовали его с помощью секвенирования и множественного выравнивания с гомологичными последовательностями. Результаты и обсуждение. Из 96 исследованных клещей, собранных на территории Ульяновской области, один был положителен на присутствие ДНК C. burnetii и один – на присутствие ДНК Coxiella sp. Для изолята C. burnetii наибольшее сходство выявлено с западноевропейскими штаммами, для Coxiella-подобного микроорганизма – с близкородственными бактериями из клещей того же вида. Отмечены уникальные полиморфизмы для обнаруженных микроорганизмов. Установлено, что родоспецифичные праймеры к фрагменту гена 16S рРНК способны амплифицировать не только бактерии рода Coxiella sp., но и генетически дистанцированные виды. Анализ последовательности протяженного фрагмента гена 16S рРНК позволяет дифференцировать C. burnetii от Coxiella-подобных микроорганизмов; некоторые полиморфизмы гена, по-видимому, возникли в процессе микроэволюции в различных географических регионах. В европейской части Российской Федерации Coxiella-подобные бактерии обнаружены впервые.</p></abstract><trans-abstract xml:lang="en"><p>The causative agent of Q fever, the intracellular pathogen Coxiella burnetii, is found almost worldwide; many types of blood-sucking ticks that are dangerous to animals and humans are involved in the circulation of the pathogen. Using molecular-genetic methods, closely related species of microorganisms of the genus Coxiella sp. have been discovered, some of which are endo-symbionts of ticks, and some can survive in the human body, causing an infectious process. The existence of species whose genes are similar in nucleotide sequence to those of C. burnetii makes it difficult to diagnose the pathogen in arthropod vectors. The aim of this work was to consider the use of PCR and sequencing of an extended 16S rRNA gene fragment for molecular diagnostics and differentiation of C. burnetii from Coxiella-like microorganisms. Materials and methods. Individual samples of blood-sucking ticks were examined to detect bacteria of the genus Coxiella sp. applying standard PCR. For positive samples, an extended fragment of the 16S rRNA gene was obtained and examined by sequencing and multiple alignment with homologous sequences. Results and discussion. Of the 96 examined ticks collected in the Ulyanovsk Region, one was positive for the presence of C. burnetii DNA and one – for the presence of Coxiella sp. The greatest similarity for the C. burnetii isolate was noted in comparison with Western European strains, for the Coxiella-like microorganism - with closely related bacteria from ticks of the same species. Unique polymorphisms for the detected microorganisms were identified. It has been established that genus-specific primers to the 16S rRNA gene fragment are able to amplify not only bacteria of the genus Coxiella sp., but also genetically distant species. Analysis of the sequence of the extended 16S rRNA gene fragment makes it possible to differentiate C. burnetii from Coxiella-like microorganisms; some gene polymorphisms appear to have arisen through microevolution in different geographic regions. In the European part of the Russian Federation, Coxiella-like bacteria have been uncovered for the first time.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Coxiella burnetii</kwd><kwd>Coxiella-подобные микроорганизмы</kwd><kwd>кровососущие клещи</kwd><kwd>ПЦР</kwd><kwd>ген 16S рРНК</kwd><kwd>полиморфизмы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Coxiella burnetii</kwd><kwd>Coxiella-like microorganisms</kwd><kwd>blood-sucking ticks</kwd><kwd>PCR</kwd><kwd>16S rRNA gene</kwd><kwd>polymorphisms</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">Spitalska E., Kocianova E. Tick-borne microorganisms in southwestern Slovakia. 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