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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="other" 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">139</article-id><article-id pub-id-type="doi">10.36233/0372-9311-2017-2-34-37</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">EFFECT OF LOW-INTENSITY RED LASER ON GROWTH OF STAPHYLOCOCCUS AUREUS AND SENSITIZING EFFECT OF PHOTODITAZIN</article-title><trans-title-group xml:lang="ru"><trans-title>ВЛИЯНИЕ НИЗКОИНТЕНСИВНОГО КРАСНОГО ЛАЗЕРА НА РОСТ ШТАММОВ STAPHYLOCOCCUS AUREUS И СЕНСИБИЛИЗИРУЮЩИЙ ЭФФЕКТ ФОТОДИТАЗИНА</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bril</surname><given-names>G. E.</given-names></name><name xml:lang="ru"><surname>Брилль</surname><given-names>Г. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Egorova</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Егорова</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bugaeva</surname><given-names>I. O.</given-names></name><name xml:lang="ru"><surname>Бугаева</surname><given-names>И. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ponomarev</surname><given-names>G. V.</given-names></name><name xml:lang="ru"><surname>Пономарев</surname><given-names>Г. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Razumovsky Saratov State Medical University</institution></aff><aff><institution xml:lang="ru">Саратовский государственный медицинский университет им. В.И.Разумовского</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Orekhovich Institute of Biomedical Chemistry</institution></aff><aff><institution xml:lang="ru">Институт биомедицинской химии им. В.Н. Ореховича</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2017-04-28" publication-format="electronic"><day>28</day><month>04</month><year>2017</year></pub-date><volume>94</volume><issue>2</issue><issue-title xml:lang="ru"/><fpage>34</fpage><lpage>37</lpage><history><date date-type="received" iso-8601-date="2019-04-10"><day>10</day><month>04</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2017, Bril G.E., Egorova A.V., Bugaeva I.O., Ponomarev G.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2017, Брилль Г.Е., Егорова А.В., Бугаева И.О., Пономарев Г.В.</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="en">Bril G.E., Egorova A.V., Bugaeva I.O., Ponomarev G.V.</copyright-holder><copyright-holder xml:lang="ru">Брилль Г.Е., Егорова А.В., Бугаева И.О., Пономарев Г.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/139">https://microbiol.crie.ru/jour/article/view/139</self-uri><abstract xml:lang="en"><p>Aim. Study the effect of laser emission in the red spectrum on growth of methicillin-sensitive and methicillin-resistant strains of Staphylococcus aureus, as well as photodynamic effect of photosensitizer photoditazin. Materials and methods. Effect of light of semiconductor red laser (X 660 nm, 100 mW/cm<sup>2</sup>) at 30, 60, 90 and 180 J/cm<sup>2</sup> on growth of S. aureus colonies was determined. Time of exposure - 5, 10, 15 and 30 minutes. In certain series of experiments bacterial cells were sensitized in advance by a water solution of photoditazin at a concentration of 5x 1 O'<sup>6</sup> M. Results. Red laser emission was established to cause a pronouncec suppression of bacterial growth. This effect on standard S. aureus strain only took place during use of relatively high exposure doses (180 J/cm<sup>2</sup>). Photosensitivity of methicillin-resistan: strain turned out to be significantly higher: bacteriostatic effect of red light was noted alreadx at the dose of 60 J/cm<sup>2</sup>. Treatment of bacterial cells with photoditazin in advance significantly enhanced growth-inhibiting effect of laser light.</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Исследовать влияние лазерного излучения красной области спектра на рост колоний метициллин-чувствительного и метициллин-резистентного штаммов Staphylococcus aureus, а также изучить фотодинамический эффект фотосенсибилизатора фотодитазина. Материалы и методы. Определяли влияние света полупроводникового красного лазера (А. 660 нм, 100 мВт/см<sup>2</sup>) вдозах 30, 60, 90 и 180 Дж/см<sup>2</sup> на рост колоний S. aureus. Время облучения - 5, 10, 15 и 30 мин. В отдельных сериях экспериментов бактериальные клетки предварительно сенсибилизировали водным раствором фотодитазина в концентрации 5х10'<sup>6</sup> М. Результаты. Установлено, что излучение красного лазера вызывало отчетливое подавление бактериального роста. Этот эффект на стандартном штамме S. aureus проявлялся только при использовании относительно высоких доз облучения (180 Дж/см<sup>2</sup>). Фоточувствительность метициллин-резистентного штамма оказалась значительно выше: бактериостатическое действие красного света отмечалось уже при дозе 60 Дж/см<sup>2</sup>. Предварительная обработка бактериальных клеток фотодитазином заметно усиливала ростингибируюший эффект лазерного света.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Staphylococcus aureus</kwd><kwd>Staphylococcus aureus</kwd><kwd>laser emission</kwd><kwd>photoditazin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лазерное излучение</kwd><kwd>фотодитазин</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Braga E.D., Aguiar-Alves Е, de Freitas M.F. et al. 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