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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">13837</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">HELICOBACTER PYLORI POPULATION CHARACTERISTIC IN PATIENTS WITH DISEASES OF GASTROINTESTINAL TRACT</article-title><trans-title-group xml:lang="ru"><trans-title>ХАРАКТЕРИСТИКА ПОПУЛЯЦИИ HELICOBACTER PYLORI У ПАЦИЕНТОВ С ЗАБОЛЕВАНИЯМИ ЖЕЛУДОЧНО-КИШЕЧНОГО ТРАКТА</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhebrun</surname><given-names>A. B</given-names></name><name xml:lang="ru"><surname>Жебрун</surname><given-names>А. Б</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Svarval</surname><given-names>A. V</given-names></name><name xml:lang="ru"><surname>Сварваль</surname><given-names>А. В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Balabash</surname><given-names>O. A</given-names></name><name xml:lang="ru"><surname>Балабаш</surname><given-names>О. А</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ferman</surname><given-names>R. S</given-names></name><name xml:lang="ru"><surname>Ферман</surname><given-names>Р. С</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, St. 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="2013-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2013</year></pub-date><volume>90</volume><issue>2</issue><issue-title xml:lang="en">NO2 (2013)</issue-title><issue-title xml:lang="ru">№2 (2013)</issue-title><fpage>90</fpage><lpage>96</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 ©; 2013, Zhebrun A.B., Svarval A.V., Balabash O.A., Ferman R.S.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2013, Жебрун А.Б., Сварваль А.В., Балабаш О.А., Ферман Р.С.</copyright-statement><copyright-year>2013</copyright-year><copyright-holder xml:lang="en">Zhebrun A.B., Svarval A.V., Balabash O.A., Ferman R.S.</copyright-holder><copyright-holder xml:lang="ru">Жебрун А.Б., Сварваль А.В., Балабаш О.А., Ферман Р.С.</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/13837">https://microbiol.crie.ru/jour/article/view/13837</self-uri><abstract xml:lang="en"><p>Aim. Study Н. pylori strains circulating in St. Petersburg among patients with various gastrointestinal tract pathology as well as study of frequency of infection by Н. pylori based on serological markers data among this group of patients. Materials and methods. By using serological method 162 individuals with various chronic diseases of stomach and duodenum were examined. The presence in blood serum of IgG against Н. pylori bacterial antigen and IgG against its toxin - CagA was studied. 129 patients were examined bacteriologically, biopsy samples of stomach mucous membrane were studied. PCR in real time format was used for study of Н. pylori strains (49) and biopsy samples (36) of stomach mucous membrane. Results. The analysis performed showed that on the territory of St. Petersburg Н. pylori strains containing cagA gene predominate (81.63% of the isolated strains). Genotyping of strains by vacA showed that s1m1 genotype was more frequent (in 57.14% of cases). The fraction of CagA positive strains in patients in St. Petersburg is maximum for stomach cancer (90.8%), whereas for peptic ulcer disease and gastritis it is 64.7% and 72.2%, respectively. In patients with stomach and duodenum pathology the parameters of seropositivity for Н. pylori were significantly higher than in individuals without clinical manifestations ofН.pylori infection (86.72% against 65.09%; p&lt;0.05). Conclusion. The data obtained on increase of fraction of CagA positive strains among Н. pylori circulating in St. Petersburg determine the importance of conducting eradication Н. pylori.</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Изучение штаммов Н. pylori, циркулирующих в Санкт-Петербурге, среди пациентов с различной патологией желудочно-кишечного тракта, а также изучение частоты инфекцирования Н. pylori по данным серологических маркеров среди данной группы больных. Материалы и методы. С помощью серологического метода были обследованы 162 человека с различными хроническими заболеваниями желудка и двенадцатиперстной кишки. Исследовано наличие в сыворотке крови IgG к бактериальному антигену H.pylori и IgG к его токсину-CagA. Бактериологически обследованы 129 пациентов, исследованию подлежали биоптаты слизистой оболочки желудка. Для изучения штаммов H. pylori (49) и биоптатов (36) слизистой оболочки желудка применяли ПЦР в формате реального времени. Результаты. Проведенный анализ показал, что на территории Санкт-Петербурга преобладают штаммы H. pylori, имеющие ген cagA (81,63% выделенных штаммов). При генотипировании штаммов по vacA установлено, что чаще встречался генотип s1m1 (в 57,14% случаев). Доля CagA-позитивных штаммов у больных в Санкт-Петербурге максимальна при раке желудка (90,8%), тогда как при язвенной болезни и гастритах она равна 64,7 и 72,2%, соответственно. У пациентов, имеющих патологию желудка и двенадцатиперстной кишки, показатели серопозитивности по H. pylori достоверно выше, чем у лиц без клинических проявлений инфекции H. pylori (86,72% против 65,09%) (p&lt;0,05). Заключение. Полученные данные о возрастании доли CagA-позитивных штаммов среди циркулирующих в С.-Петербурге H. pylori определяют важность проведения эради-кации H. pylori.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Helicobacter pylori</kwd><kwd>H. pylori infection</kwd><kwd>IgG against H. pylori screening</kwd><kwd>H. pylori strains</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>инфекция H.pylori</kwd><kwd>скрининг IgG к H.pylori</kwd><kwd>штаммы H.pylori</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Жебрун А.Б. Инфекция H. pylori. СПб, Феникс, 2006.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Жебрун А.Б., Александрова В.А., Гончарова Л.Б., Ткаченко Е.И. 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