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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">epidemiology</journal-id><journal-title-group><journal-title xml:lang="ru">Эпидемиология и Вакцинопрофилактика</journal-title><trans-title-group xml:lang="en"><trans-title>Epidemiology and Vaccinal Prevention</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-3046</issn><issn pub-type="epub">2619-0494</issn><publisher><publisher-name>«Numicom» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31631/2073-3046-2024-23-1-41-50</article-id><article-id custom-type="elpub" pub-id-type="custom">epidemiology-1938</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>ПРАКТИЧЕСКИЕ АСПЕКТЫ ЭПИДЕМИОЛОГИИ И ВАКЦИНОПРОФИЛАКТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRACTICAL ASPECTS OF EPIDEMIOLOGY AND VACCINE PREVENTION</subject></subj-group></article-categories><title-group><article-title>Трансмиссионная электронная микроскопия биопленок Vibrio cholerae на хитин-содержащих субстратах</article-title><trans-title-group xml:lang="en"><trans-title>Transmission Electronic Microscopy of Vibrio cholerae Biofilms on Chitin-Containing Substrates</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7831-841X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Титова</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Titova</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Светлана Викторовна Титова – к. м. н., ведущий научный сотрудник лаборатории природно-очаговых и зоонозных инфекций,</p><p>Ростов-на-Дону,</p><p>тел.+7 (863) 240-91-08.</p></bio><bio xml:lang="en"><p>Svetlana V. Titova – Cand. Sci. (Med.), leading researcher, laboratories of natural focal and zoonotic infections,</p><p>Rostov-on-Don,</p><p>tel. +7 (863) 240-91-08.</p></bio><email xlink:type="simple">titova_sv@antiplague.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/0000-0001-8261-2294</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Симонова</surname><given-names>И. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Simonova</surname><given-names>I. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Рафиковна Симонова  – старший научный сотрудник лаборатории диагностических препаратов,</p><p>Ростов-на-Дону.</p></bio><bio xml:lang="en"><p>Irina R. Simonova – senior Researcher, laboratories of diagnostic preparations,</p><p>Rostov-on-Don.</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/0000-0002-6003-4283</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Меньшикова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Menshikova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елена Аркадьевна Меньшикова – к. б. н., с. н. с. отдела микробиологии холеры и других острых кишечных инфекций,</p><p>Ростов-на-Дону. </p></bio><bio xml:lang="en"><p>Elena A. Menshikova  – Cand. Sci. (Biol.), senior researcher Department of  Microbiology of  cholera and other acute intestinal infections,</p><p>Rostov-on-Don.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Осадчая</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Osadchaya</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктория Сергеевна Осадчая – лаборант-исследователь лаборатории природно-очаговых и зоонозных инфекций, </p><p>Ростов-на-Дону.</p></bio><bio xml:lang="en"><p>Victoria S. Osadchaya – laboratory assistant of the laboratories of natural focal and zoonotic infections, </p><p>Rostov-on-Don.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФКУЗ Ростовский-на-Дону Ордена Трудового Красного Знамени научно-исследовательский противочумный институт Роспотребнадзора</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FKUZ Rostov-on-Don of the Order of the Red Banner of Labor Research Anti-Plague Institute of Rospotrebnadzor</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>01</day><month>03</month><year>2024</year></pub-date><volume>23</volume><issue>1</issue><fpage>41</fpage><lpage>50</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Титова С.В., Симонова И.Р., Меньшикова Е.А., Осадчая В.С., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Титова С.В., Симонова И.Р., Меньшикова Е.А., Осадчая В.С.</copyright-holder><copyright-holder xml:lang="en">Titova S.V., Simonova I.R., Menshikova E.A., Osadchaya V.S.</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://www.epidemvac.ru/jour/article/view/1938">https://www.epidemvac.ru/jour/article/view/1938</self-uri><abstract><p>Актуальность. Эволюционно сложившаяся ассоциация Vibrio cholerae с хитином обеспечила устойчивость к стрессовым воздействиям и защиту от хищников. Образование биопленки служит важнейшим механизмом создания эффективной ассоциации холерного вибриона с хитином. Способность формировать биопленку у V. cholerae зависит от наличия токсинкоррегулируемых пилей адгезии (TCP), за синтез которых отвечают гены tcp A-F. Одним из ключевых методов исследования биопленок является микроскопия. Она позволяет визуализировать структурные элементы и изучать различные параметры биопленок и эффекты воздействия на них различных факторов. Цель. Определение эпидзначимости биопленкообразующей способности токсигенных штаммов по их морфологическим особенностям на хитин-содержащих субстратах. Изучение структурных различий биопленок холерных вибрионов tcpA+ и tcpA– штаммов на хитин-содержащих субстратах. Материалы и методы. В исследовании использованы штаммы холерных вибрионов, разные по токсигенности и происхождению. В своей работе мы применили трансмиссионную электронную микроскопию для оценки эпидзначимости процесса биопленкообразования V. cholerae на хитин-содержащих субстратах. Результаты. Показано, что холерные вибрионы tcpA+ и tcpA– штаммов способны образовывать биопленки на поверхности хитин-содержащих субстратов. Интенсивность образования биопленок более выражена у tcpA+ штаммов, т.к. клетки V. cholerae ctxA+ tcpA+ в составе биопленки располагаются преимущественно одиночно и поверхность хитинового экзоскелета, с которой они контактируют, интактна, клетки V. cholerae ctxA– tcpA– в составе биопленки образуют цепочки, что указывает на процессы деления, а разрозненный хитин эндокутикулы свидетельствует об активности метаболических процессов. Заключение. Используемые в работе штаммы V. cholerae, независимо от наличия или отсутствия генов ctx и tcp, образуют биопленки на хитиновом субстрате. Показатель биопленкообразования по толщине матрикса биопленки выше у V. cholerae ctxA+ tcpA+ , по степени деградации хитинового субстрата выше у V. cholerae ctxA– tcpA– . Холерные вибрионы, имеющие ген tcpA, обладают большей интенсивностью биопленкообразования, что, в свою очередь, указывает на эпидемическую значимость феномена биопленкообразования и свидетельствует о важной роли хитина для персистенции холерных вибрионов в условиях гидробиоценозов водоемов и возможности выживания и сохранения эпидемически значимых штаммов.</p></abstract><trans-abstract xml:lang="en"><p>Introduction. The evolutionary association of Vibrio cholerae with chitin provided resistance to stress and protection from predators. The most important mechanism that provided V. cholerae with the effectiveness of association with chitin is biofilm formation. The ability to form a biofilm in V. cholerae depends on the presence of a factor, toxin-corrected adhesion pili (TCP), which are synthesized by the tcp A-F genes. One of the key methods for studying biofilms is microscopy. It allows one to visualize the structural elements and study various parameters of biofilms and the effects of various factors on them. Aim. To determine the epidemiological significance of the biofilm-forming ability of toxigenic strains by their morphological characteristics on chitin-containing substrates. Study of structural differences in biofilms of Vibrio cholerae tcpA+– and tcpA– strains on chitin-containing substrates. Results. It has been shown that Vibrio cholerae tcpA+– and tcpA– strains are able to form biofilms on the surface of chitin-containing substrates. The intensity of biofilm formation is more pronounced in tcpA+ strains, because V. cholerae ctxA+ tcpA+ cells in the biofilm are predominantly singly located and the surface of the chitinous exoskeleton with which they are in contact is intact, V. cholerae ctxA– tcpA– cells form chains in the biofilm, which indicates division processes, and scattered chitin of the endocuticle indicates activity of metabolic processes. Conclusion. The strains of V. cholerae used in the work, regardless of the presence or absence of the ctx and tcp genes, form bioplecs on a chitin substrate. The indicator of biofilm formation in terms of the thickness of the biofilm matrix is higher in V. cholerae ctxA+ tcpA+ , in terms of the degree of degradation of the chitin substrate it is higher in V. cholerae ctxA– tcpA– .</p></trans-abstract><kwd-group xml:lang="ru"><kwd>биопленка</kwd><kwd>Vibrio cholera</kwd><kwd>хитин</kwd><kwd>трансмиссионная электронная микроскопия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>biofilms</kwd><kwd>Vibrio cholera</kwd><kwd>chitin</kwd><kwd>transmission electron microscopy</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы выражают искреннюю благодарность научному сотруднику Головину Сергею Николаевичу, за непосредственное участие в подготовке проб для трансмиссионной электронной микроскопии.</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">Silva A.J., Benitez J.A. 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