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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">veterinary</journal-id><journal-title-group><journal-title xml:lang="ru">Ветеринария сегодня</journal-title><trans-title-group xml:lang="en"><trans-title>Veterinary Science Today</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2304-196X</issn><issn pub-type="epub">2658-6959</issn><publisher><publisher-name>"Veinard"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29326/2304-196X-2025-14-2-186-193</article-id><article-id custom-type="elpub" pub-id-type="custom">veterinary-917</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 | ВЕТЕРИНАРНАЯ МИКРОБИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES | VETERINARY MICROBIOLOGY</subject></subj-group></article-categories><title-group><article-title>Индикация биопленок изолятов Escherichia coli, Escherichia albertii, Proteus vulgaris, идентифицированных при болезнях органов дыхания и пищеварения птиц</article-title><trans-title-group xml:lang="en"><trans-title>Identification of Escherichia coli, Escherichia albertii, Proteus vulgaris biofilms detected in poultry with respiratory and gastrointestinal diseases</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2576-2020</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ленченко</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Lenchenko</surname><given-names>E. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ленченко Екатерина Михайловна, д-р вет. наук, профессор кафедры ветеринарной медицины,</p><p>Волоколамское шоссе, 11, г. Москва, 125080.</p></bio><bio xml:lang="en"><p>Ekaterina M. Lenchenko, Dr. Sci. (Veterinary Medicine), Professor, Department of Veterinary Medicine, </p><p>11, Volokolamskoe highway, Moscow 125080.</p></bio><email xlink:type="simple">lenchenko-ekaterina@yandex.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/0000-0003-4634-4362</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пономарев</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ponomarev</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пономарев Владислав Владимирович, аспирант кафедры ветеринарной медицины, </p><p>Волоколамское шоссе, 11, г. Москва, 125080.</p></bio><bio xml:lang="en"><p>Vladislav V. Ponomarev, Postgraduate Student, Department of Veterinary Medicine, </p><p>11, Volokolamskoe highway, Moscow 125080.</p></bio><email xlink:type="simple">vladponomarev1404@yandex.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/0000-0003-1100-929X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сачивкина</surname><given-names>Н. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Sachivkina</surname><given-names>N. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сачивкина Надежда Павловна, канд. биол. наук, доцент департамента ветеринарной медицины Аграрно-технологического института,</p><p>ул. Миклухо-Маклая, 6, г. Москва, 117198.</p></bio><bio xml:lang="en"><p>Nadezda P. Sachivkina, Cand. Sci. (Biology), Associate Professor, Department of Veterinary Medicine, Agrarian and Technological Institute, </p><p>6, Miklukho-Maklaya str., Moscow 117198.</p></bio><email xlink:type="simple">sachivkina@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Российский биотехнологический университет (РОСБИОТЕХ)»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Biotechnological University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГАОУ ВО «Российский университет дружбы народов имени Патриса Лумумбы» (РУДН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Peoples’ Friendship University of Russia named after Patrice Lumumba</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>28</day><month>06</month><year>2025</year></pub-date><volume>14</volume><issue>2</issue><fpage>186</fpage><lpage>193</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ленченко Е.М., Пономарев В.В., Сачивкина Н.П., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Ленченко Е.М., Пономарев В.В., Сачивкина Н.П.</copyright-holder><copyright-holder xml:lang="en">Lenchenko E.M., Ponomarev V.V., Sachivkina N.P.</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://veterinary.arriah.ru/jour/article/view/917">https://veterinary.arriah.ru/jour/article/view/917</self-uri><abstract><sec><title>Введение</title><p>Введение. При снижении компенсаторных механизмов резистентности организма, изменении состава эволюционно сложившихся микробиоценозов избыточному росту патогенных микроорганизмов способствует репрезентация сигнальных молекул quorum sensing. Антибактериальный потенциал ингибиторов синтеза молекул межклеточных коммуникаций достигается за счет снижения адгезии микроорганизмов, а соответственно, и степени контаминации in vivo и in vitro. </p></sec><sec><title>Цель исследования</title><p>Цель исследования. Изучение динамики изменений морфометрических и денситометрических показателей биопленок изолятов Escherichia coli, Escherichia albertii, Proteus vulgaris, идентифицированных при болезнях органов дыхания и пищеварения птиц.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Исследовали динамику развития биопленок референтных штаммов и изолятов, выделенных из патматериала птицы: куры кросса ROSS-308 40–42-недельного возраста (n = 20). Оптическую плотность исследуемых образцов определяли с применением фотометрического анализатора Immunochem-2100 (HTI, США), длина волны 580 нм (OD580). Морфометрические показатели учитывали при достоверной частоте встречаемости ≥ 90,0% поля зрения оптического микроскопа H604 Trinocular Unico (United Рroducts &amp; Instruments Inc., США) и сканирующего электронного микроскопа Hitachi TM3030 Plus (Hitachi, Япония).</p></sec><sec><title>Результаты</title><p>Результаты. Из патматериала птиц с признаками катарально-геморрагического аэросаккулита, геморрагического энтерита, фибринозного полисерозита и спленомегалии были выделены и идентифицированы Escherichia coli, Escherichia albertii, Proteus vulgaris. В зависимости от времени культивирования установлены прямые коррелятивные зависимости (r = 0,91) между морфометрическими и денситометрическими показателями. При дисперсии гетерогенной популяции доминируют клетки с дефектной клеточной стенкой, сферопласты, игольчатые и гигантские структуры, а также клетки-ревертанты.</p></sec><sec><title>Заключение</title><p>Заключение. Общие закономерности динамики развития гетерогенной популяции микроорганизмов опосредованы адгезией, синтезом экзоцеллюлярных молекул, интенсивной пролиферацией и дифференциацией клеток в зависимости от стадии клеточного цикла.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. When the body resistance-associated compensatory mechanisms are impaired or evolutionarily developed microbiocenoses are changed the quorum sensing signaling molecules facilitates excessive growth of pathogenic microorganisms. Antibacterial potential of inhibitors of intercellular communication molecule synthesis is achieved through reducing the microorganism adhesion and, consequently, in vivo and in vitro contamination.</p></sec><sec><title>Objective</title><p>Objective. Study of the dynamics of morphometric and densitometric parameters of biofilms formed by Escherichia coli, Escherichia albertii, Proteus vulgaris isolates identified in poultry with respiratory and gastrointestinal diseases.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Dynamics of the biofilms formed by reference strains and isolates recovered from pathological samples from ROSS-308 chickens at the age of 40–42 weeks (n = 20) were studied. The sample optical densities were determined using Immunochem-2100 photometric analyzer (HTI, USA), wavelength 580 nm (OD580). Morphometric parameters were recorded at ≥ 90.0% reliable frequency in the field of view of Н604 Trinocular Unico optical microscope (United Products &amp; Instruments Inc., USA) and Hitachi TM3030 Plus scanning electron microscope (Hitachi, Japan).</p></sec><sec><title>Results</title><p>Results. Escherichia coli, Escherichia albertii, and Proteus vulgaris were isolated from pathological samples from the poultry with catarrhal hemorrhagic aerosacculitis, hemorrhagic enteritis, fibrinous polyserositis and splenomegaly signs and then identified. Direct correlations (r = 0.91) between morphometric and densitometric parameters depending on the cultivation time were established. Cells with defective cell walls, spheroplasts, needle-like and giant structures as well as revertant cells dominated during heterogeneous population dispersion.</p></sec><sec><title>Conclusion</title><p>Conclusion. General patterns of the heterogeneous microorganism population development are mediated by adhesion, synthesis of exocellular molecules, intensive cell proliferation and differentiation depending on the cell cycle stage.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>биопленки</kwd><kwd>бактерии</kwd><kwd>гетероморфизм</kwd><kwd>денситометрия</kwd><kwd>оптическая микроскопия</kwd><kwd>сканирующая электронная микроскопия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>biofilms</kwd><kwd>bacteria</kwd><kwd>heteromorphism</kwd><kwd>densitometry</kwd><kwd>optical microscopy</kwd><kwd>scanning electron microscopy</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы благодарят РОСБИОТЕХ, Белгородский филиал ФГБУ «ВНИИЗЖ», РУДН за предоставленные возможности для проведения исследовательской работы.</funding-statement><funding-statement xml:lang="en">The authors thank the Russian Biotechnological University, Belgorod Branch of the Federal Centre for Animal Health, and Peoples’ Friendship University of Russia named after Patrice Lumumba for the study support.</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">Janda J. 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