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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ivm</journal-id><journal-title-group><journal-title xml:lang="ru">Международный вестник ветеринарии</journal-title><trans-title-group xml:lang="en"><trans-title>International Journal of Veterinary Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-2419</issn><publisher><publisher-name>SpbGUVM Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52419/issn2072-2419.2025.2.46</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1685</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ИНФЕКЦИОННЫЕ БОЛЕЗНИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFECTIOUS DISEASES</subject></subj-group></article-categories><title-group><article-title>Оценка безопасности и безвредности рекомбинантного кандидатного штамма для профилактики высокопатогенного гриппа птиц H5N1</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the safety and harmlessness of a recombinant candidate strain for the prevention of highly pathogenic H5N1 avian influenza</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6474-9171</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тарлавин</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tarlavin</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, асс. каф. эпизоотологии им. В.П. Урбана</p></bio><bio xml:lang="en"><p>Candidate of veterinary sciences, Senior lecturer of the Department of Epizootology named after V.P. Urban</p></bio><email xlink:type="simple">tarlav1995@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9648-2259</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Веретенников</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Veretennikov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Senior lecturer of the Department of Epizootology named after V.P. Urban</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1589-6300</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Джавадов</surname><given-names>Э. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Javadov</surname><given-names>E. J.</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Historical Sciences, Professor of the Department of Epizootology named after V.P. Urbana</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0411-9896</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сергеева</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sergeeva</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, вед. науч. сотр. лаборатории векторных вакцин ,</p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Leading Researcher at the Laboratory of Vector Vaccines</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кудря</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudrya</surname><given-names>K. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборант-исследователь</p></bio><bio xml:lang="en"><p>Laboratory researcher</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2362-2641</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Красков</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kraskov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>асп. каф. эпизоотологии им. В.П. Урбана</p></bio><bio xml:lang="en"><p>postgraduate student of the Department of Epizootology named after V.P. Urban</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-1063-1690</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яковлева</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakovleva</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студ. 5 курса ФВМ</p></bio><bio xml:lang="en"><p>5th year student</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-6912-2413</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горбаков</surname><given-names>М. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbakov</surname><given-names>M. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студ. 4 курса ФВМ</p></bio><bio xml:lang="en"><p>4th year student</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-1478-8705</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калиматова</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalimatova</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студ. 4 курса ФВМ</p></bio><bio xml:lang="en"><p>4th year student </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-3517-3776</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хрипункова</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Khripunkova</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студент 4 курса ФВМ</p></bio><bio xml:lang="en"><p>4th year student </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Санкт-Петербургский государственный университет ветеринарной медицины»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBEI HE SPbSUVM</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУ «НИИ гриппа им. А.А. Смородинцева»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Smorodintsev Influenza Research Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>01</day><month>08</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>46</fpage><lpage>53</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тарлавин Н.В., Веретенников В.В., Джавадов Э.Д., Сергеева М.В., Кудря К.С., Красков Д.А., Яковлева А.С., Горбаков М.Е., Калиматова А.А., Хрипункова Д.С., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Тарлавин Н.В., Веретенников В.В., Джавадов Э.Д., Сергеева М.В., Кудря К.С., Красков Д.А., Яковлева А.С., Горбаков М.Е., Калиматова А.А., Хрипункова Д.С.</copyright-holder><copyright-holder xml:lang="en">Tarlavin N.V., Veretennikov V.V., Javadov E.J., Sergeeva M.V., Kudrya K.S., Kraskov D.A., Yakovleva A.S., Gorbakov M.E., Kalimatova A.A., Khripunkova D.S.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vetjournal.spbguvm.ru/jour/article/view/1685">https://vetjournal.spbguvm.ru/jour/article/view/1685</self-uri><abstract><p>В рамках работ по гранту РНФ № 24-76-10044 был получен кандидатный вакцинный штамм вируса гриппа птиц A/Syktyvkar/PR8/6:2/HA20 (H5N1), обладающий низковирулентным фенотипом вследствие замены сайта расщепления гемагглютинина.В статье представлены результаты исследований безопасности и безвредности рекомбинантного штамма вируса гриппа птиц A/Syktyvkar/PR8/6:2/HA20 (H5N1). У эмбрионов, инфицированных рекомбинантным вирусом, не наблюдались геморрагии и повреждения. Полученные данные свидетельствуют о безопасности вируса A/Syktyvkar/PR8/6:2/HA20 (H5N1) для куриных эмбрионов. Изучение безвредности проводили при внутрибрюшинном введении белым мышам неинактивированного вируса (данная группа также служила контролем для инактивированных препаратов), и при введении вируса, инактивированного формалином, бетапропиолактоном и смесью теотропина и мертиолята. Значительной потери веса ни в одной из наблюдаемых групп не было обнаружено, что свидетельствует о безвредности штамма A/Syktyvkar/PR8/6:2/HA20 для белых беспородных мышей, а также хорошей переносимости препаратов, полученных с применением всех исследованных схем инактивации. Безвредность инактивированной вакцины, изготовленной на основе изучаемого штамма вируса с добавлением гидроксида алюминия в качестве адъюванта, проверяли путем изучения изменения живой массы суточных цыплят кросса Декалб Уайт. Во всех 3-х исследуемых группах полностью отсутствовали следы истощения, интоксикации, а также следы проявления болезни, что говорит о полной инактивации и безвредности вируса. Оценка безвредности вакцины также была проведена на десяти 150-дневных курах кросса Доминант. После введения 10-кратной прививной дозы в грудную мышцу за птицами наблюдали в течение 28 сут. Все куры в течение указанного времени остались живыми, без видимых клинических признаков переболевания и в месте введения вакцины отсутствовали следы воспалительной реакции. Можно сделать вывод, что штамм A/Syktyvkar/PR8/6:2/HA20 (H5N1) безопасен, а инактивированные вакцины, изготовленные из данного штамма, полностью безвредны.</p></abstract><trans-abstract xml:lang="en"><p>Within the framework of the Russian Science Foundation Grant No. 24-76-10044, a candidate vaccine strain of avian influenza virus A/Syktyvkar/PR8/6:2/HA20 (H5N1) was obtained, which has a low-virulent phenotype due to replacement of the hemagglutinin cleavage site. This virus does not cause the death of developing chicken embryos during incubation and the clinical manifestation of the disease in animals upon infection. The article presents the results of studies on the safety and harmlessness of a recombinant strain of avian influenza virus A/ Syktyvkar/PR8/6:2/HA20 (H5N1). No hemorrhages or lesions were observed in embryos infected with the live recombinant virus. The data obtained indicate the safety of the A/Syktyvkar/PR8/6:2/HA20 virus for embryonated chicken eggs. The study of harmlessness was carried out with intraperitoneal administration of an inactivated virus to white mice (this group also served as a control for inactivated drugs), and with the introduction of a virus inactivated with formalin, betapropiolactone and a mixture of theotropin and merthiolate. No significant weight loss was found in any of the observed groups, which indicates the harmlessness of the A/Syktyvkar/PR8/6:2/HA20strain for white outbred mice, as well as the good tolerability of drugs obtained using all the studied inactivation schemes. The harmlessness of an inactivated vaccine made from the inactivated virus strain with the addition of aluminum hydroxide as an adjuvant was tested by studying changes in the live weight of one-day-old Dekalb White cross chickens. In all study groups, there were no signs of exhaustion, intoxication, or signs of disease, which indicates complete inactivation and harmlessness of the virus. An assessment of the vaccine's harmlessness was also carried out on ten 150-day-old Dominant chickens. After a 10-fold inoculation dose was injected into the pectoral muscle, the birds were monitored for 28 days. All chickens remained alive during the specified time, with no visible clinical signs of illness, and there were no signs of an inflammatory reaction at the injection site. Thus, it can be concluded that the A/Syktyvkar/PR8/6:2/HA20 (H5N1) strain is safe, and inactivated vaccines made from this strain are completely harmless.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>высокопатогенный грипп птиц</kwd><kwd>H5N1</kwd><kwd>обратная генетика</kwd><kwd>рекомбинантные вакцины</kwd><kwd>безвредность вакцин</kwd><kwd>безопасность вирусов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>highly pathogenic avian influenza</kwd><kwd>H5N1</kwd><kwd>reverse genetics</kwd><kwd>recombinant vaccines</kwd><kwd>vaccine safety</kwd><kwd>virus safety</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда № 24-76-10044, https://rscf.ru/project/24-76-10044»</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Борисов А.В. ФГУ «ВГНКИ» ВНИИЗЖ. 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