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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">antibiotics</journal-id><journal-title-group><journal-title xml:lang="ru">Антибиотики и Химиотерапия</journal-title><trans-title-group xml:lang="en"><trans-title>Antibiot Khimioter = Antibiotics and Chemotherapy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0235-2990</issn><publisher><publisher-name>ООО «Издательство ОКИ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37489/0235-2990-2023-68-5-6-11-18</article-id><article-id custom-type="elpub" pub-id-type="custom">antibiotics-1040</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>ЭКСПЕРИМЕНТАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Experimental Research</subject></subj-group></article-categories><title-group><article-title>Биологические свойства и антибиотикорезистентность Klebsiella pneumoniae и её роль в этиологической структуре возбудителей внебольничных пневмоний</article-title><trans-title-group xml:lang="en"><trans-title>Biological Properties and Antibiotic Resistance of Klebsiella pneumoniae and Its Role in the Etiological Structure of Community-Acquired Pneumonia Pathogens</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4010-2138</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Анисимова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Anisimova</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник лаборатории природно-очаговых и зоонозных инфекций</p><p>117/40, ул. М. Горького, Ростовский-на-Дону противочумный институт, г. Ростов-на-Дону,  344002</p></bio><bio xml:lang="en"><p>Junior Researcher at the Laboratory of Natural Focal and Zoonotic Infections</p><p>117/40, M. Gorkogo st., Rostov-on-Don Plague Control Research Institute, Rostov-on-Don, 344002</p></bio><email xlink:type="simple">info@tularemia.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/0000-0001-8287-4294</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Павлович</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pavlovich</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., главный научный сотрудник, и.о. начальника отдела природно-очаговых и зоонозных инфекций</p></bio><bio xml:lang="en"><p>D. Sc. in Medicine, Chief Researcher, Acting Head of the Department of Natural Focal and Zoonotic Infections</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/0000-0002-7772-9276</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аронова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Aronova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. б. н., старший научный сотрудник лаборатории природно-очаговых и зоонозных инфекций</p></bio><bio xml:lang="en"><p>Ph. D. in Biology, Senior Researcher at the Laboratory of Natural Focal and Zoonotic Infections</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/0000-0002-4091-649X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цимбалистова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsimbalistova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. м. н., старший научный сотрудник лаборатории природно-очаговых и зоонозных инфекций</p></bio><bio xml:lang="en"><p>Ph. D. in Medicine, Senior Researcher at the Laboratory of Natural Focal and Zoonotic Infections</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/0000-0002-6114-9891</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гудуева</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Gudueva</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник лаборатории «Коллекция патогенных микроорганизмов» </p></bio><bio xml:lang="en"><p>Junior Researcher at the laboratory «Collection of Pathogenic Microorganisms»</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/0000-0002-1525-5693</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пасюкова</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Pasyukova</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>научный сотрудник лаборатории экспериментально-биологических моделей и биологической безопасности</p></bio><bio xml:lang="en"><p>Researcher at the Laboratory of Experimental Biological Models and Biological Safety</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/0000-0002-3585-7026</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Теплякова</surname><given-names>Е. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Teplyakova</surname><given-names>E. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д. м. н., первый заместитель МЗ РО, профессор кафедры детских болезней ФГБОУ ВО РостГМУ</p></bio><bio xml:lang="en"><p>First Deputy of the Ministry of Health of the Russian Academy of Sciences, Professor of the Department of Children's Diseases of the Federal State Budgetary Educational Institution of the Russian State Medical University, Doctor of Medical Sciences</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0550-2221</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Носков</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Noskov</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. м. н., директор </p></bio><bio xml:lang="en"><p>Ph. D. in Medicine, Director</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 противочумный институт Роспотребнадзора</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Rostov-on-Don Plague Control Research Institute</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Министерство здравоохранения Ростовской области; ФГБОУ ВО Ростовский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ministry of Health of the Rostov Region; Rostov State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>20</day><month>10</month><year>2023</year></pub-date><volume>68</volume><issue>5-6</issue><fpage>11</fpage><lpage>18</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Анисимова А.С., Павлович Н.В., Аронова Н.В., Цимбалистова М.В., Гудуева Е.Н., Пасюкова Н.И., Теплякова Е.Д., Носков А.К., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Анисимова А.С., Павлович Н.В., Аронова Н.В., Цимбалистова М.В., Гудуева Е.Н., Пасюкова Н.И., Теплякова Е.Д., Носков А.К.</copyright-holder><copyright-holder xml:lang="en">Anisimova A.S., Pavlovich N.V., Aronova N.V., Tsimbalistova M.V., Gudueva E.N., Pasyukova N.I., Teplyakova E.D., Noskov A.K.</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.antibiotics-chemotherapy.ru/jour/article/view/1040">https://www.antibiotics-chemotherapy.ru/jour/article/view/1040</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. В условиях пандемии новой коронавирусной инфекции наиболее частыми осложнениями вирусных пневмоний являются вторичные инфекции бактериальной и грибковой этиологии. При этом глобальной угрозой для здравоохранения остаётся широкое распространение бактерий с множественной лекарственной устойчивостью. Одним из таких микроорганизмов семейства Enterobacteriaceae является Klebsiella pneumoniae, относящаяся к опасным резистентным патогенам группы ESKAPE.</p></sec><sec><title>Цель</title><p>Цель. Сравнительный анализ биологических свойств классических и гипермукоидных штаммов K.рneumoniaе, выделенных от пациентов с внебольничной пневмонией (ВП): характеристика их чувствительности к антибактериальным препаратам, клебсиеллёзному бактериофагу, дезинфектанту (полигексаметиленгуанидин гидрохлорид) и оценка вирулентности штаммов на модели экспериментальной инфекции белых мышей.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. Проведено изучение 56 штаммов клебсиелл, изолированных в диагностических количествах из образцов мокроты от пациентов. Видовую идентификацию культур проводили с помощью бактериологического и масс-спектрометрического методов. Чувствительность бактерий к антибиотикам, бактериофагу и дезинфектанту определяли в соответствии с регламентирующими документами.</p></sec><sec><title>Результаты</title><p>Результаты. При выполнении работы было выделено 243 грамотрицательных культуры, из которых 30% составляли бактерии рода Klebsiella spp. Анализ их видового состава показал, что доминирующее место в структуре занимала K.pneumoniae. По морфологии колоний, окраске мазков по Бурри–Гинсу и положительному «стринг-тесту» были определены 14 штаммов с гипермукоидным фенотипом. Эти штаммы отличались от классических наличием более толстой капсулы в мазках, вирулентностью для белых мышей (DCL ≤ 103 м. кл.) и повышенной устойчивостью к коммерческому клебсиеллёзному бактериофагу. В то же время они характеризовались более широким спектром чувствительности к антибиотикам. Достоверных различий в чувствительности к дезинфектанту у штаммов обоих морфотипов не обнаружено.</p></sec><sec><title>Заключение</title><p>Заключение. Полученные результаты продемонстрировали важную роль K.pneumoniae в этиологической структуре возбудителей ВП.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. In a novel coronavirus pandemic, the most common complications of viral pneumonia are secondary infections of bacterial and fungal etiology. At the same time, the spread of multidrug-resistant bacteria remains a global threat to public health. One of such microorganisms of the Enterobacteriaceae family is Klebsiella pneumoniae, which belongs to dangerous resistant pathogens of the ESKAPE group.</p><p>The aim of the study was the comparative analysis of the biological properties of classical and hypermucoid strains of K.pneumoniae isolated from patients with community-acquired pneumonia (CAP): characterization of their sensitivity to antibacterial drugs, Klebsiella bacteriophage, and a disinfectant (polyhexamethylene guanidine hydrochloride), as well as assessment of the strains’ virulence in the model of experimental infection in white mice.</p></sec><sec><title>Material and methods</title><p>Material and methods. 56 strains of Klebsiella isolated in diagnostic quantities from patients’ sputum samples were studied. Species identification of cultures was carried out using bacteriological and mass spectrometric methods. The sensitivity of bacteria to antibiotics, bacteriophage, and the disinfectant was determined in accordance with regulatory documents.</p></sec><sec><title>Results</title><p>Results. In the course of the study, 243 gram-negative cultures were isolated, of which 30% were bacteria of the genus Klebsiella spp. An analysis of their species composition showed that K.pneumoniae occupied a dominant place in the structure. Based on colony morphology, Burri-Gins smear staining, and a positive string test, 14 strains with a hypermucoid phenotype were identified. These strains differed from the classic K.pneumoniae strain by the presence of a thicker capsule in smears, virulence in white mice (DCL≤103 mc), and increased resistance to commercial Klebsiella bacteriophage. At the same time, they were characterized by a wider spectrum of sensitivity to antibiotics. There were no significant differences in sensitivity to the disinfectant in strains of both morphotypes.</p></sec><sec><title>Conclusion</title><p>Conclusion. The results obtained demonstrated the important role of K.pneumoniae in the etiological structure of CAP pathogens.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Klebsiella pneumoniae</kwd><kwd>гипермукоидные штаммы</kwd><kwd>классические штаммы</kwd><kwd>вирулентность</kwd><kwd>антибиотикорезистентность</kwd><kwd>фагочувствительность</kwd><kwd>чувствительность к дезинфектанту</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Klebsiella pneumoniae</kwd><kwd>hypermucoid strains</kwd><kwd>classic strains</kwd><kwd>virulence</kwd><kwd>antibiotic resistance</kwd><kwd>phagosensitivity</kwd><kwd>sensitivity to disinfectant</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">Giacobbe D.R., Battaglini D., Ball L., Brunetti I., Bruzzone B., Codda G. et al. Bloodstream infections in critically ill patients with COVID-19. 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