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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">10.21055/0370-1069-2022-2-107-114</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-1702</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>Разработка способа определения биоваров Brucella suis методом мультилокусной ПЦР с учетом результатов в режиме реального времени</article-title><trans-title-group xml:lang="en"><trans-title>Development of a Method for Determination of brucella suis Biovars  Using Multilocus Real-time PCR</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0954-5683</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Осина</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Osina</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Осина Наталия Александровна</p><p>410005, Саратов, ул.Университетская, 46</p></bio><bio xml:lang="en"><p>Natalia A. Osina</p><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/0000-0002-2766-2624</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ситмбетов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sitmbetov</surname><given-names>D. 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/0000-0002-4731-8089</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Доманина</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Domanina</surname><given-names>I. V.</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"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ляшова</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyashova</surname><given-names>O. Yu.</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/0000-0003-1143-4069</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щербакова</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shcherbakova</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>410005, Саратов, ул.Университетская, 46</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/0000-0002-4998-7673</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Касьян</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kas’yan</surname><given-names>I. 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/0000-0002-9828-3277</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/0000-0003-2405-2684</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Булгакова</surname><given-names>Е. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Bulgakova</surname><given-names>E. 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><email xlink:type="simple">rusrapi@microbe.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФКУЗ «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><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>13</day><month>07</month><year>2022</year></pub-date><volume>0</volume><issue>2</issue><fpage>107</fpage><lpage>114</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Осина Н.А., Ситмбетов Д.А., Доманина И.В., Ляшова И.В., Щербакова С.А., Касьян И.А., Касьян Ж.А., Булгакова Е.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Осина Н.А., Ситмбетов Д.А., Доманина И.В., Ляшова И.В., Щербакова С.А., Касьян И.А., Касьян Ж.А., Булгакова Е.Г.</copyright-holder><copyright-holder xml:lang="en">Osina N.A., Sitmbetov D.A., Domanina I.V., Lyashova O.Y., Shcherbakova S.A., Kas’yan I.A., Kas’yan Z.A., Bulgakova E.G.</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/1702">https://journal.microbe.ru/jour/article/view/1702</self-uri><abstract><p>Цель исследования – разработка методического подхода для определения биоваров Brucella suis методом мультилокусной ПЦР с учетом результатов в режиме реального времени. Материалы и методы. В работе использовали 16 штаммов B. suis различных биоваров, по 2 шт. – B. neotomae и B. canis. Определение таксономической принадлежности штаммов бруцелл осуществляли по протоколам Bruce-ladder, Suis-ladder, БРУ-ДИФ. Подбор праймеров и зондов проводили с помощью программного обеспечения на сайте www.genscript.com и программы GeneRanner 6.5.52. Фрагментное секвенирование по Сэнгеру осуществляли на генетическом анализаторе 3500 XL в соответствии с рекомендациями производителя. Оценку гомологии нуклеотидных последовательностей проводили по алгоритму BLAST, используя базу данных GenBank NCBI. Результаты и обсуждение. У штаммов B. suis различных биоваров проведен анализ структурной организации геномных островов IncP и GI-3. Установлено, что у штаммов 2, 4 биоваров B. suis и B. canis в результате гомологичной рекомбинации в геномном острове IncP утрачена концевая часть гена BRA0368, включающая 21 нуклеотид (повторяющийся в гене BRA0367) и стоп-кодон TAA, а также практически полностью последовательность гена BRA0367. Прямой повтор из 21 нуклеотида и стоп-кодона TGA гена BRA0367 заместил аналогичную область гена BRA0368, что привело к образованию делеции размером 185 п.н. В структуре GI-3 отличий у биоваров отмечено не было. Полученные результаты позволили разработать подход (Suis-ДИФ) для дифференциации биоваров B. suis, основанный на амплификации генов, расположенных в геномных островах IncP и GI-3, методом ПЦР с учетом результатов в режиме реального времени. Подтверждена его специфичность при исследовании штаммов B. suis из фонда Государственной коллекции патогенных бактерий ФКУЗ РосНИПЧИ «Микроб». Проведенные исследования расширяют и дополняют сведения о генетической неоднородности видов и биоваров бруцелл. Предложенный способ определения биоваров B. suis методом мультилокусной ПЦР с учетом результатов в режиме реального времени расширяет возможности идентификации бруцелл с помощью молекулярно-генетических методов.</p></abstract><trans-abstract xml:lang="en"><p>The aim of the study was to develop a methodological approach to determination of Brucella suis biovars through multilocus PCR with real-time registration of results.</p><sec><title>Materials and methods</title><p>Materials and methods. We used 16 strains of B. suis of various biovars, B. neotomae and B. canis – 2 strains of each. Determination of the taxonomic affiliation of Brucella strains was carried out according to the Bruce-ladder, Suis-ladder, BRU-DIF protocols. The selection of primers and probes was performed using the software on the website www.genscript.com and the GeneRanner 6.5.52 program. Fragment sequencing according to Sanger was performed on a 3500 XL genetic analyzer in accordance with the manufacturer’s recommendations. Nucleotide sequence homology was assessed using the BLAST algorithm and the GenBank NCBI database.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. An analysis of the structural organization of IncP and GI-3 genomic islands has been carried out in B. suis strains of various biovars. It has been established that in strains of B. suis II, IV biovars and B. canis, the terminal part of the BRA0368 gene, comprising 21 nucleotides (repeated in the BRA0367 gene) and the “TAA” stop codon, as well as almost the entire sequence of the BRA0367 gene were lost, owing to homologous recombination in the IncP genome island. A 21-nucleotide direct repeat and the “TGA” stop codon of the BRA0367 gene replaced the analogous region of the BRA0368 gene which resulted in the deletion the size of 185 bp. No differences have been noted in the structure of GI-3 in biovars. The evidence obtained made it possible to develop the approach (SuisDIF) for differentiating B. suis biovars, based on the amplification of genes located in the IncP and GI-3 genomic islands using real-time PCR. Its specificity was confirmed in the study of B. suis strains from the fund of the State Collection of Pathogenic Bacteria of the Russian Research Anti-Plague Institute “Microbe”. The conducted studies expand and supplement the data on the genetic heterogeneity of Brucella species and biovars. The proposed method for differentiating biovars of B. suis using multilocus PCR with real-time registration of results enhances the capacities for Brucella identification using molecular-genetic methods.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>мультилокусная пцр</kwd><kwd>внутривидовая дифференциация</kwd><kwd>Brucella suis</kwd><kwd>биовары</kwd><kwd>геномные острова IncP и GI-3</kwd><kwd>структурная организация</kwd><kwd>фрагментное секвенирование по сэнгеру</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multilocus PCR</kwd><kwd>intraspecific differentiation</kwd><kwd>Brucella suis</kwd><kwd>biovars</kwd><kwd>IncP and GI-3 genomic islands</kwd><kwd>structural organization</kwd><kwd>Sanger fragment sequencing</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">Касьян Ж.А., Осина Н.А., Щербакова С.А. 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