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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">jofin</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал инфектологии</journal-title><trans-title-group xml:lang="en"><trans-title>Journal Infectology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-6732</issn><publisher><publisher-name>IPO “АIDSSPbR"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22625/2072-6732-2021-13-4-51-56</article-id><article-id custom-type="elpub" pub-id-type="custom">jofin-1269</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 исследования</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Original Research</subject></subj-group></article-categories><title-group><article-title>Особенности взаимодействия высокои низковирулентных штаммов вируса клещевого энцефалита дальневосточного субтипа с лейкоцитами крови человека</article-title><trans-title-group xml:lang="en"><trans-title>Peculiarities of interaction of high and low virulent strains of tick-borne Encephalitis virus of the Far Eastern subtype with human blood leukocytes</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Леонова</surname><given-names>Г. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Leonova</surname><given-names>G. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>главный научный сотрудник лаборатории природно-очаговых инфекций, д.м.н, профессор,</p><p>Владивосток</p></bio><bio xml:lang="en"><p>Vladivostok</p></bio><email xlink:type="simple">galinaleon41@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-исследовательский институт эпидемиологии и микробиологии им. Г.П. Сомова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Institute of Epidemiology and Microbiology named after G.P. Somov</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>26</day><month>12</month><year>2021</year></pub-date><volume>13</volume><issue>4</issue><fpage>51</fpage><lpage>56</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Леонова Г.Н., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Леонова Г.Н.</copyright-holder><copyright-holder xml:lang="en">Leonova G.N.</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.niidi.ru/jofin/article/view/1269">https://journal.niidi.ru/jofin/article/view/1269</self-uri><abstract><p>В настоящей работе показан первый этап взаимодействия вируса клещевого энцефалита с клетками крови, при котором происходит отбор штаммов вируса, способных к успешной сборке вирионов.</p><sec><title>Цель</title><p>Цель: показать ex vivo особенности взаимодействия разных по молекулярно-генетической структуре и по вирулентности штаммов вируса клещевого энцефалита с лейкоцитами крови человека.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Венозную кровь донора заражали ex vivo вирусом клещевого энцефалита, используя высоковирулентный штамм Dal’negorsk и низковирулентный штамм Primorye-437. Наблюдения за накоплением вируса в экспериментальных пробах крови проводили через 15 мин, 30 мин, 1 ч и 24 ч экспозиции. Индикация вируса, показанная разными методами лабораторной диагностики (ИФА, ПЦР, НМФА, титр инфекционного вируса), позволила выявить характерные особенности начальной стадии инфекционного процесса, вызванного этими штаммами вируса клещевого энцефалита.</p></sec><sec><title>Результаты</title><p>Результаты. В пробах со штаммом Dal’ во все сроки наблюдения выявлены одинаковые показатели детекции вирусного генома (Ct=25-27). В ИФА антиген вируса не выявлен. Штамм Р-437 показал задержку проникновения в лейкоциты, проявляя себя в ПЦР-РВ (Ct=15-17) в равной степени, как и в контроле (Ct=17). Одновременно показатели антигена вируса клещевого энцефалита в ИФА были положительными и снизились только через 24 ч экспозиции. Подобные результаты получены в НМФА и по титру вируса в пробах.</p></sec><sec><title>Заключение</title><p>Заключение. Высокопатогенный штамм Dal´ продемонстрировал способность быстро за 15 мин проникать в лейкоциты и, значит, в начальной стадии инфекционного процесса реализовать механизмы «ускользания» его от иммунного надзора. Низковирулентный штамм Р-437, напротив, показал способность длительно находиться на поверхности лейкоцитов, проникая в них только после 24 ч экспозиции, сразу оказывая влияние непосредственно на клетки иммунной системы, что может приводить к быстрой элиминации вируса из организма. </p></sec></abstract><trans-abstract xml:lang="en"><p>In this work, it was necessary to show the first stage of the interaction of the tick-borne encephalitis virus with blood cells, during which the selection of virus strains capable of successful assembly of virions occurs.</p><sec><title>The aim of the work</title><p>The aim of the work: to show ex vivo the features of interaction of strains TBEV with different molecular genetic structure and virulence with human blood leukocytes.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The donor’s venous blood was infected ex vivo with the TBEV using the highly virulent strain Dal’negorsk and the low-virulent strain Primorye-437. Virus accumulation in experimental blood samples was observed after 15 min, 30 min, 1 h, and 24 h of exposition. The indication of the virus, shown by different methods of laboratory diagnostics (ELISA, PCR, IFA, titer of the infectious virus), made it possible to identify the characteristic features of the initial stage of the infectious process caused by these strains TBEV.</p></sec><sec><title>Conclusion</title><p>Conclusion. The highly pathogenic strain Dal‘ has demonstrated the ability to quickly penetrate into leukocytes in 15 minutes, and, therefore, at the initial stage of the infectious process, to implement the mechanisms of its “escape” from immune supervision. The low-virulent strain P-437, on the contrary, showed the ability to stay on the surface of leukocytes for a long time, penetrating into them only after 24 hours of exposure, immediately influencing the cells of the immune system, which can lead to rapid elimination of the virus from the body.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>вирус клещевого энцефалита</kwd><kwd>высоковирулентный штамм</kwd><kwd>низковирулентный штамм</kwd><kwd>лейкоциты крови человека</kwd></kwd-group><kwd-group xml:lang="en"><kwd>tick-borne encephalitis virus (TBEV)</kwd><kwd>highly virulent strain</kwd><kwd>low virulent strain</kwd><kwd>human blood leukocytes</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">Suss J. Tick-borne encephalitis 2010: epidemiology, risk areas, and virus strains in Europe and Asia: an overview. 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