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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">Pediatrics. Consilium Medicum</journal-id><journal-title-group><journal-title xml:lang="en">Pediatrics. Consilium Medicum</journal-title><trans-title-group xml:lang="ru"><trans-title>Педиатрия. Consilium Medicum</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-6630</issn><issn publication-format="electronic">2658-6622</issn><publisher><publisher-name xml:lang="en">Consilium Medicum</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">689445</article-id><article-id pub-id-type="doi">10.26442/26586630.2025.3.203409</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">Familial perinatal exposure to viral hepatitis B: A series of clinical cases</article-title><trans-title-group xml:lang="ru"><trans-title>Семейный перинатальный контакт по вирусному гепатиту В (серия клинических наблюдений)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1083-2807</contrib-id><name-alternatives><name xml:lang="en"><surname>Pervishko</surname><given-names>Olesia V.</given-names></name><name xml:lang="ru"><surname>Первишко</surname><given-names>Олеся Валерьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med.), Assoc. Prof.</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доц., зав. каф. педиатрии №1</p></bio><email>ole-pervishko@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3731-6263</contrib-id><name-alternatives><name xml:lang="en"><surname>Pykov</surname><given-names>Mikhail I.</given-names></name><name xml:lang="ru"><surname>Пыков</surname><given-names>Михаил Иванович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Prof.</p></bio><bio xml:lang="ru"><p>д-р мед. наук, проф., зав. каф. лучевой диагностики детского возраста</p></bio><email>ole-pervishko@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8887-0593</contrib-id><name-alternatives><name xml:lang="en"><surname>Bondarenko</surname><given-names>Svetlana A.</given-names></name><name xml:lang="ru"><surname>Бондаренко</surname><given-names>Светлана Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Laboratory Assistant</p></bio><bio xml:lang="ru"><p>ст. лаборант каф. педиатрии №1</p></bio><email>ole-pervishko@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-9727-2543</contrib-id><name-alternatives><name xml:lang="en"><surname>Soboleva</surname><given-names>Natalia G.</given-names></name><name xml:lang="ru"><surname>Соболева</surname><given-names>Наталья Геннадьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Prof., Chief Doctor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, проф., гл. педиатр</p></bio><email>ole-pervishko@yandex.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4200-4598</contrib-id><name-alternatives><name xml:lang="en"><surname>Zakharova</surname><given-names>Irina N.</given-names></name><name xml:lang="ru"><surname>Захарова</surname><given-names>Ирина Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Prof.</p></bio><bio xml:lang="ru"><p>д-р мед. наук, проф., зав. каф. педиатрии им. акад. Г.Н. Сперанского, засл. врач РФ</p></bio><email>ole-pervishko@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kuban State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Кубанский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Russian Medical Academy of Continuing Professional Education</institution></aff><aff><institution xml:lang="ru">ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Clinic "G8 Center"</institution></aff><aff><institution xml:lang="ru">Клиника «G8 Center»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-10-14" publication-format="electronic"><day>14</day><month>10</month><year>2025</year></pub-date><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>268</fpage><lpage>273</lpage><history><date date-type="received" iso-8601-date="2025-08-18"><day>18</day><month>08</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-10-03"><day>03</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Consilium Medicum</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, ООО "Консилиум Медикум"</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Consilium Medicum</copyright-holder><copyright-holder xml:lang="ru">ООО "Консилиум Медикум"</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-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://pediatria.orscience.ru/2658-6630/article/view/689445">https://pediatria.orscience.ru/2658-6630/article/view/689445</self-uri><abstract xml:lang="en"><p>The development of chronic hepatitis B in children may be the result of vertical transmission of the virus during pregnancy. The article presents a series of three different outcomes of perinatal HBV infection exposure in children born to a woman with chronic hepatitis. The development of chronic disease in children resulted from the pregnancy of a woman with a high viral load (&gt; 10<sup>9</sup> IU/mL) and the presence of HBsAg and HBeAg. In addition, the guidelines for the active and passive hepatitis B prophylaxis in newborns from pregnancy I and II were not thoroughly followed. Administered antiviral therapy with tenofovir during pregnancy III reduced the viral load in the mother; specific immunotherapy and vaccine prophylaxis on Day 1 of life reduced the risk of hepatitis B in the third child. The presented clinical cases demonstrate the need for careful monitoring of women with HBV infection during pregnancy and timely preventive measures for the newborn. The observation approach used can reduce the risk of HBV infection.</p></abstract><trans-abstract xml:lang="ru"><p>Формирование хронического вирусного гепатита В (ХВГВ) в детском возрасте может быть результатом передачи вируса гепатита В (HBV) от матери ребенку во время беременности. В статье представлена серия из 3 различных вариантов реализации перинатального контакта с HBV у детей, рожденных от женщины с ХВГВ. Развитие хронического течения заболевания у детей стало результатом беременности женщины с высокой вирусной нагрузкой (&gt; 10<sup>9</sup> МЕ/мл) и наличием HBsAg и HBеAg. В то же время не полностью были выдержаны рекомендации по назначению активной и пассивной профилактики HBV-инфекции у новорожденных от I и II беременности. Назначенная противовирусная терапия препаратом тенофовир во время III беременности уменьшила вирусную нагрузку у матери, проведение специфической иммунотерапии и вакцинопрофилактика в 1-е сутки от момента рождения снизили риск HBV-инфекции у третьего ребенка. Представленные клинические случаи демонстрируют необходимость тщательного наблюдения за женщинами с HBV-инфекцией во время беременности, проведения своевременных профилактических мер для новорожденного. Применяемая тактика наблюдения позволит снизить риск HBV-инфекции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>perinatal exposure to HBV infection</kwd><kwd>pregnant</kwd><kwd>newborns</kwd><kwd>chronic hepatitis B</kwd><kwd>immunoprophylaxis of perinatal infection with hepatitis B virus</kwd><kwd>HBV infection in children</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>перинатальный контакт по HBV-инфекции</kwd><kwd>беременная</kwd><kwd>новорожденные</kwd><kwd>хронический вирусный гепатит В</kwd><kwd>иммунопрофилактика перинатального инфицирования вирусом гепатита В</kwd><kwd>HBV-инфекция у детей</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Герасимова В.В., Левакова И.А., Бичурина М.А., Максимова Н.Р. Молекулярно-эпидемиологические особенности вирусного гепатита B. Инфекция и иммунитет. 2015;5(4):297-302 [Gerasimova VV, Levakova IA, Bichurina MA, Maksimova NR. 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