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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="research-article" 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">14178</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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">FEATURES OF BIOLOGIC CHARACTERISTICS OF CORYNEBACTERIUM DIPHTHERIAE CIRCULATING IN POSTEPIDEMIC PERIOD</article-title><trans-title-group xml:lang="ru"><trans-title>ОСОБЕННОСТИ БИОЛОГИЧЕСКИХ СВОЙСТВ CORYNEBACTERIUM DIPHTHERIAE, ЦИРКУЛИРУЮЩИХ В ПОСТЭПИДЕМИЧЕСКИЙ ПЕРИОД</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kraeva</surname><given-names>L. A</given-names></name><name xml:lang="ru"><surname>Краева</surname><given-names>Л. А</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tseneva</surname><given-names>G. Ya</given-names></name><name xml:lang="ru"><surname>Ценева</surname><given-names>Г. Я</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Pasteur Research Institute of Epidemiology and Microbiology, Saint-Petersburg, Russia</institution></aff><aff><institution xml:lang="ru">НИИ эпидемиологии и микробиологии им.Пастера, Санкт-Петербург</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2009-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2009</year></pub-date><volume>86</volume><issue>3</issue><issue-title xml:lang="en">NO3 (2009)</issue-title><issue-title xml:lang="ru"/><fpage>3</fpage><lpage>6</lpage><history><date date-type="received" iso-8601-date="2023-06-13"><day>13</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2009, Kraeva L.A., Tseneva G.Y.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2009, Краева Л.А., Ценева Г.Я.</copyright-statement><copyright-year>2009</copyright-year><copyright-holder xml:lang="en">Kraeva L.A., Tseneva G.Y.</copyright-holder><copyright-holder xml:lang="ru">Краева Л.А., Ценева Г.Я.</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/14178">https://microbiol.crie.ru/jour/article/view/14178</self-uri><abstract xml:lang="ru"><p>Aim. To study main biologic characteristics of C.diphtheriae strains circulating in North-West Region of Russia for the last 15 years. Materials and methods. Six hundred and fifty strains of C.diphtheriae isolated from ill persons and carriers in Saint-Petersburg, Leningrad region and Vologda region at various periods of time were studied. Identification of an infectious agent was performed according to methodic guidelines MU 4.2698-98. IHA-chromatographic test (ICS-test) on the basis of MKA, polymerase chain reaction, determination of adhesive activity and susceptibility to antibiotics were performed. Results. In recent years, circulation of C.diphtheriae strains with biologic characteristics similar to that observed in strains isolated during diphtheria epidemic and differed from that observed in strains isolated during the period of low incidence. Proportion of strains with «silent» gene between non-toxic in Elek-test C.diphtheriae increased. Decreasing of susceptibility to the range of antibiotics is observed in recent years. Conclusion. Revealed features of biologic characteristics of diphtheria agent circulating in post-epidemic period should be accounted during epidemiologic surveillance for diphtheria and choice of treatment of the infection.</p></abstract><kwd-group xml:lang="en"><kwd>C.diphtheriae strains</kwd><kwd>biologic characteristics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>штаммы C.diphtheriae</kwd><kwd>биологические свойства</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Каральник Б.В., Маркова С.Г. Загрязнение окружающей среды и особенности эпидемического процесса дифтерии. Журн. микробиол. 1996, 4: 79-83.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Карась С.Р. Адгезивные свойства дифтерийных бактерий, выделенных от различных источников. Автореф. дис. канд. биол. наук. 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