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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="brief-report" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of microbiology, epidemiology and immunobiology</journal-id><journal-title-group><journal-title xml:lang="en">Journal of microbiology, epidemiology and immunobiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал микробиологии, эпидемиологии и иммунобиологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0372-9311</issn><issn publication-format="electronic">2686-7613</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">14034</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Short Communication</subject></subj-group></article-categories><title-group><article-title xml:lang="en">BIOFILM FORMATION BY GROUP A STREPTOCOCCI OF VARIOUS TYPES AND STUDY OF ANTIBIOTICS EFFECT ON THIS PROCESS</article-title><trans-title-group xml:lang="ru"><trans-title>ФОРМИРОВАНИЕ БИОПЛЕНОК СТРЕПТОКОККАМИ ГРУППЫ А РАЗНЫХ ТИПОВ И ИЗУЧЕНИЕ ВЛИЯНИЯ АНТИБИОТИКОВ НА ЭТОТ ПРОЦЕСС</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Danilova</surname><given-names>T. A</given-names></name><name xml:lang="ru"><surname>Данилова</surname><given-names>Т. А</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Danilina</surname><given-names>G. A</given-names></name><name xml:lang="ru"><surname>Данилина</surname><given-names>Г. А</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Adzhieva</surname><given-names>A. A</given-names></name><name xml:lang="ru"><surname>Аджиева</surname><given-names>А. А</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Minko</surname><given-names>A. G</given-names></name><name xml:lang="ru"><surname>Минко</surname><given-names>А. Г</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Alekseeva</surname><given-names>N. V</given-names></name><name xml:lang="ru"><surname>Алексеева</surname><given-names>Н. В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Gamaleya Federal Research Centre of Epidemiology and Microbiology</institution></aff><aff><institution xml:lang="ru">Федеральный научно-исследовательский центр эпидемиологии и микробиологии им. Н.Ф.Гамалеи</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2015-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2015</year></pub-date><volume>92</volume><issue>2</issue><issue-title xml:lang="en">NO2 (2015)</issue-title><issue-title xml:lang="ru">№2 (2015)</issue-title><fpage>50</fpage><lpage>54</lpage><history><date date-type="received" iso-8601-date="2023-06-09"><day>09</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2015, Danilova T.A., Danilina G.A., Adzhieva A.A., Minko A.G., Alekseeva N.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2015, Данилова Т.А., Данилина Г.А., Аджиева А.А., Минко А.Г., Алексеева Н.В.</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="en">Danilova T.A., Danilina G.A., Adzhieva A.A., Minko A.G., Alekseeva N.V.</copyright-holder><copyright-holder xml:lang="ru">Данилова Т.А., Данилина Г.А., Аджиева А.А., Минко А.Г., Алексеева Н.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://microbiol.crie.ru/jour/article/view/14034">https://microbiol.crie.ru/jour/article/view/14034</self-uri><abstract xml:lang="en"><p>Aim. Evaluation of the ability to form biofilms by various M, T and MT-types of group A streptococci (GAS), as well as study of the effect of various antibiotics on biofilm formation. Materials and methods. 43 strains of various M and T type GAS were studied. The cultures were grown in Todd-Hewitt broth with the addition of 0.5% yeast extract. Comparative evaluation of the ability to form biofilm was carried out using photometry. Benzylpenicillin, oxacillin, cephalosporin, cefuroxime and ceftriaxone antibiotics were used at various concentrations. Results. GAS differ significantly by their ability to form biofilms. The highest ability was noted in 8 strains - 2М, 9М, 12М, 13М, 19М, 30М, 36М-types and 6МТ type. Simultaneous introduction of GAS cultures and antibiotics into the culture well, except for ceftriaxone, resulted in growth inhibition of both plankton cells and biofilms. Conclusion. The ability of GAS to form biofilm depends on streptococci serotype. During simultaneous introduction of GAS with antibiotics into the well, the biofilm does not form.</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Оценка способности к формированию биопленок у разных М, Т и МТ-типов стрептококка группы А (СГА), а также изучение влияния различных антибиотиков на формирование биопленок. Материалы и методы. Изучено 43 штамма различных М и Т-типов СГА. Культуры выращивали на бульоне Todd-Hewitt c добавлением 0,5% экстракта дрожжей. Сравнительную оценку способности к формированию биопленки проводили с помощью фотометрии. Использованы антибиотики бензилпенициллин, окса-циллин, цефалоспорин, цефуроксим и цефтриаксон в различных концентрациях. Результаты. СГА существенно различаются по способности к формированию биопленок. Наиболее высокая способность отмечена у 8 штаммов 2М, 9М, 12М, 13М, 19М, 30М, 36М типов и типа 6МТ. Одновременное внесение в лунку культур СГА и антибиотиков, за исключением цефтриаксона, приводило к ингибиции роста как планктонных клеток, так и биопленок. Заключение. Способность СГА к формированию биопленки зависит от серотипа стрептококка. При одновременном внесении в лунку СГА с антибиотиком биопленка не образуется.</p></trans-abstract><kwd-group xml:lang="en"><kwd>group A streptococci</kwd><kwd>biofilms</kwd><kwd>antibiotics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>стрептококки группы А</kwd><kwd>биопленки</kwd><kwd>антибиотики</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Данилова ТА. Инвазивная инфекция, вызываемая стрептококками группы А, и синдром стрептококкового токсического шока. Журн. микробиол. 2001, 3: 99-105.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Клейменов Д.А., Брико Н.И., Аксенова А.В. 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