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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">10.21055/0370-1069-2025-4-54-60</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-2249</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>Аллельные варианты локусов гена p66 у изолятов от клещей Ixodes persulcatus и I. trianguliceps – переносчиков возбудителя иксодового клещевого боррелиоза Borrelia bavariensis</article-title><trans-title-group xml:lang="en"><trans-title>Allelic Variants of the p66 Gene Loci in Isolates from Ixodes persulcatus and I. trianguliceps Ticks, Vectors of the Causative Agent of Tick-Borne Borreliosis, Borrelia bavariensis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4832-6248</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Голидонова</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Golidonova</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Голидонова Кристина Андреевна, </p><p>123098, Москва, ул. Гамалеи, 18</p></bio><bio xml:lang="en"><p>Kristina A. Golidonova,</p><p>18, Gamaleya St., Moscow, 123098</p></bio><email xlink:type="simple">kristi.dekor@mail.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/0000-0002-4452-4231</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коренберг</surname><given-names>Э. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Korenberg</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123098, Москва, ул. Гамалеи, 18</p></bio><bio xml:lang="en"><p>18, Gamaleya St., Moscow, 123098</p></bio><email xlink:type="simple">info@gamaleya.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1936-7868</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковалевский</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalevsky</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123098, Москва, ул. Гамалеи, 18</p></bio><bio xml:lang="en"><p>18, Gamaleya St., Moscow, 123098</p></bio><email xlink:type="simple">info@gamaleya.org</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>Горелова</surname><given-names>Н. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorelova</surname><given-names>N. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123098, Москва, ул. Гамалеи, 18</p></bio><bio xml:lang="en"><p>18, Gamaleya St., Moscow, 123098</p></bio><email xlink:type="simple">info@gamaleya.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2325-8584</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Матросова</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Matrosova</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119334, Москва, ул. Вавилова, 32</p></bio><bio xml:lang="en"><p>32, Vavilova St., Moscow, 119334</p></bio><email xlink:type="simple">isinfo@eimb.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный исследовательский центр эпидемиологии и микробиологии имени почетного академика Н.Ф. Гамалеи» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Center of Epidemiology and Microbiology named after Honorary Academician N.F. Gamaleya, Ministry of Health of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУН Институт молекулярной биологии им. В.А. Энгельгардта РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Molecular Biology named after V.A. Engelhardt of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>14</day><month>01</month><year>2026</year></pub-date><volume>0</volume><issue>4</issue><fpage>54</fpage><lpage>60</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Голидонова К.А., Коренберг Э.И., Ковалевский Ю.В., Горелова Н.Б., Матросова В.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Голидонова К.А., Коренберг Э.И., Ковалевский Ю.В., Горелова Н.Б., Матросова В.А.</copyright-holder><copyright-holder xml:lang="en">Golidonova K.A., Korenberg E.I., Kovalevsky Y.V., Gorelova N.B., Matrosova V.A.</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/2249">https://journal.microbe.ru/jour/article/view/2249</self-uri><abstract><p>Цель исследования – изучение генетической вариабельности локусов гена р66 изолятов Borrelia bavariensis, выделенных от имаго и нимф Ixodes persulcatus, а также от нимф I. trianguliceps. </p><sec><title>Материалы и методы</title><p>Материалы и методы. Исследованы 123 изолята B. bavariensis от нимф и имаго таежного клеща и от нимф I. trianguliceps, отловленных в 1993–2003 гг. в природном очаге иксодового клещевого боррелиоза (ИКБ) Пермского края. Нуклеотидные последовательности получены методом полимеразной цепной реакции с последующим секвенированием ампликонов локусов гена p66. Результаты проанализированы с использованием сервиса BLAST. Дендрограмма построена методом максимального правдоподобия в MEGA11 (bootstrap 1000 повторов).</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Среди исследованных изолятов обнаружены 8 аллельных вариантов локусов гена p66 B. bavariensis, 6 из которых – у имаго таежного клеща. Изоляты от нимф I. trianguliceps имеют практически сходный набор таких вариантов c изолятами от нимф и имаго I. persulcatus. У изолятов от нимф (70,0±7,2 %) и имаго (67,2±6,2 %) таежного клеща чаще встречались аллельные варианты № 1 и 2. Они также преобладали среди изолятов от нимф I. trianguliceps (76,0±17,4 %). В исследуемом природном очаге клещи I. persulcatus и I. trianguliceps поддерживают циркуляцию различных аллельных вариантов B. bavariensis, что подтверждается наличием у них соответствующих локусов гена p66. Варианты аллелей № 1 и 2 по гену p66 идентичны обнаруженным ранее у изолятов B. bavariensis от людей с ИКБ (K. Golidonova et al., 2022). Значительное преобладание двух выявленных аллельных вариантов боррелий у клещей-переносчиков при циркуляции возбудителя в природном очаге объясняет наиболее частые заражения людей ИКБ именно этими вариантами.</p></sec></abstract><trans-abstract xml:lang="en"><p>The aim of the study was to investigate the genetic variability of p66 gene loci in Borrelia bavariensis isolates obtained from adults and nymphs of Ixodes persulcatus ticks, as well as from nymphs of I. trianguliceps.</p><sec><title>Materials and methods</title><p>Materials and methods. 123 isolates of B. bavariensis from nymphs and adults of taiga tick and from nymphs of I. trianguliceps collected in 1993–2003 in the natural focus of Ixodid tick-borne borreliosis (ITBB) of Perm Territory were studied. Nucleotide sequences were obtained using polymerase chain reaction followed by sequencing of p66 gene loci amplicons. The results were analyzed applying BLAST service. The dendrogram was constructed using the maximum likelihood method in MEGA11 software (a bootstrap value of 1000 repeats).</p></sec><sec><title>Results and discussion</title><p>Results and discussion. Among the studied isolates, 8 allelic variants of p66 gene loci of B. bavariensis were found, 6 of which were in the adult taiga ticks. Isolates from nymphs of I. trianguliceps have an almost similar set of such variants as isolates from nymphs and adults of I. persulcatus. In isolates from nymphs (70.0±7.2 %) and adults (67.2±6.2 %) of the taiga tick, allelic variants No. 1 and 2 were more frequent. They also prevailed among isolates from I. trianguliceps nymphs (76.0±17.4 %). In the studied natural focus, I. persulcatus and I. trianguliceps ticks maintain the circulation of various allelic variants of Borrelia bavariensis, which is confirmed by the presence of corresponding p66 gene loci in them. Variants No. 1 and 2 are identical to those previously detected in isolates B. bavariensis from humans with ITBB (Golidonova et al., 2022). The significant prevalence of the two identified allelic variants of Borrelia in tick vectors during circulation of the pathogen in the natural focus explains the most frequent infections of population with ITBB by these variants.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Borrelia bavariensis</kwd><kwd>иксодовые клещи</kwd><kwd>ген p66</kwd><kwd>аллельные варианты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Borrelia bavariensis</kwd><kwd>Ixodid ticks</kwd><kwd>p66 gene</kwd><kwd>allelic variants</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Минздрава России «Изучение эколого-генетических факторов повышенной патогенности возбудителей иксодовых клещевых боррелиозов как основа прогнозирования их эпидемической опасности в разработке средств лабораторной диагностики» (121030900383-2).</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the state assignment of the Ministry of Health of the Russian Federation “Study of ecological and genetic factors of increased pathogenicity of Ixodidae tick-borne borreliosis agents as a basis for predicting their epidemic hazard in the development of laboratory diagnostic tools” (121030900383-2).</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">Hunfeld K.-P., Gray J., editors. 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