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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">veterinary</journal-id><journal-title-group><journal-title xml:lang="ru">Ветеринария сегодня</journal-title><trans-title-group xml:lang="en"><trans-title>Veterinary Science Today</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2304-196X</issn><issn pub-type="epub">2658-6959</issn><publisher><publisher-name>"Veinard"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29326/2304-196X-2025-14-1-47-54</article-id><article-id custom-type="elpub" pub-id-type="custom">veterinary-892</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>ОРИГИНАЛЬНЫЕ СТАТЬИ | БОЛЕЗНИ ПТИЦ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES | AVIAN DISEASES</subject></subj-group></article-categories><title-group><article-title>Иммуногенная активность вакцины «ВНИИЗЖ-АвиФлуВак» против актуального для России в 2023 году вируса высокопатогенного гриппа птиц H5N1</article-title><trans-title-group xml:lang="en"><trans-title>Immunogenic activity of “ARRIAH-AviFluVac” vaccine against high-pathogenicity H5N1 avian influenza virus relevant for Russia in 2023</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9672-8594</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мороз</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Moroz</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мороз Наталья Владимировна, канд. вет. наук, заведующий лабораторией профилактики болезней птиц</p><p>мкр. Юрьевец, г. Владимир, 600901</p></bio><bio xml:lang="en"><p>Natalia V. Moroz, Cand. Sci. (Veterinary Medicine), Head of Laboratory for Avian Diseases Prevention</p><p>Yur’evets, Vladimir 600901</p></bio><email xlink:type="simple">moroz@arriah.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/0009-0009-5177-953X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Долгов</surname><given-names>Д. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Dolgov</surname><given-names>D. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Долгов Дмитрий Львович, канд. вет. наук, заведующий сектором лаборатории профилактики болезней птиц</p><p>мкр. Юрьевец, г. Владимир, 600901</p><p> </p></bio><bio xml:lang="en"><p>Dmitry  L.  Dolgov, Cand. Sci. (Veterinary Medicine), Head of Sector, Laboratory for Avian Diseases Prevention</p><p>Yur’evets, Vladimir 600901</p></bio><email xlink:type="simple">dolgov@arriah.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/0000-0001-6802-9940</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фролов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Frolov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фролов Сергей Владимирович, канд. вет. наук, начальник отдела профилактики болезней птиц</p><p>мкр. Юрьевец, г. Владимир, 600901</p></bio><bio xml:lang="en"><p>Sergey V. Frolov, Cand. Sci. (Veterinary Medicine), Head of Department for Avian Disease Prevention</p><p>Yur’evets, Vladimir 600901</p></bio><email xlink:type="simple">frolov@arriah.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/0009-0001-6119-0202</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Грехнева</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Grekhneva</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Грехнева Алена Дмитриевна, аспирант, ведущий специалист референтной лаборатории вирусных болезней птиц</p><p>мкр. Юрьевец, г. Владимир, 600901</p></bio><bio xml:lang="en"><p>Alena D. Grekhneva, Postgraduate Student, Leading Specialist, Head of Reference Laboratory for Avian Viral Diseases</p><p>Yur’evets, Vladimir 600901</p></bio><email xlink:type="simple">grehneva@arriah.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/0000-0002-1898-4576</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кулаков</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulakov</surname><given-names>V. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кулаков Владимир Юрьевич, канд. вет. наук, ведущий научный сотрудник лаборатории профилактики болезней птиц</p><p>мкр. Юрьевец, г. Владимир, 600901</p></bio><bio xml:lang="en"><p>Vladimir Yu. Kulakov, Cand. Sci. (Veterinary Medicine), Leading Researcher, Laboratory for Avian Diseases Prevention</p><p>Yur’evets, Vladimir 600901</p></bio><email xlink:type="simple">kulakov@arriah.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Федеральный центр охраны здоровья животных» (ФГБУ «ВНИИЗЖ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Centre for Animal Health</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>21</day><month>03</month><year>2025</year></pub-date><volume>14</volume><issue>1</issue><fpage>47</fpage><lpage>54</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мороз Н.В., Долгов Д.Л., Фролов С.В., Грехнева А.Д., Кулаков В.Ю., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Мороз Н.В., Долгов Д.Л., Фролов С.В., Грехнева А.Д., Кулаков В.Ю.</copyright-holder><copyright-holder xml:lang="en">Moroz N.V., Dolgov D.L., Frolov S.V., Grekhneva A.D., Kulakov V.Y.</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://veterinary.arriah.ru/jour/article/view/892">https://veterinary.arriah.ru/jour/article/view/892</self-uri><abstract><sec><title>Введение</title><p>Введение. Вакцинопрофилактика высокопатогенного гриппа птиц является надежным способом борьбы с болезнью. Среди антигриппозных вакцин наиболее широкое распространение имеют инактивированные цельновирионные препараты. Изучение иммуногенной активности вакцины «ВНИИЗЖ-АвиФлуВак» против актуальных вирусов высокопатогенного гриппа птиц является важной задачей.</p></sec><sec><title>Цель исследования</title><p>Цель исследования. Оценка иммуногенной активности инактивированной вакцины «ВНИИЗЖ-АвиФлуВак» против актуального для России в 2023 г. высокопатогенного вируса гриппа птиц подтипа H5N1.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Для испытаний готовили 4 вакцинных образца, содержащих цельный и разведенный 1/25, 1/50 и 1/100 антиген вируса гриппа птиц Н5 в прививном объеме. Каждым препаратом была привита отдельная группа птиц 4-недельного возраста. Через 28 сут куры были заражены вирусом гриппа птиц A/gull/Kirov/998-1/2023 H5N1, который был выделен во время вспышки заболевания на территории Российской Федерации и филогенетически определен как высокопатогенный возбудитель, принадлежащий к азиатской генетической линии вируса высокопатогенного гриппа птиц подтипа H5 (клада 2.3.4.4b). В группах зараженных птиц в течение 6 дней регистрировали погибших и больных особей.</p></sec><sec><title>Результаты</title><p>Результаты. Установили, что птицы, привитые цельной дозой антигена, были полностью защищены от клинического проявления болезни после контрольного заражения. Уменьшение концентрации антигена в прививном объеме обусловило снижение протективной защиты вакцины. Показатель смертности после заражения контрольных (интактных) цыплят составил 10/10. Анализ зависимости протективной активности вакцины от величины иммунизирующей дозы антигена показал, что одна прививная доза содержала 97 ПД50. Исследование связи протективной защиты и напряженности поствакцинального гуморального иммунитета позволило определить, что ожидаемый среднегрупповой титр антител, который соответствует защите 90% вакцинированных птиц, составил 5,7 log2 , или ≈ 1:52.</p></sec><sec><title>Заключение</title><p>Заключение. Вакцина «ВНИИЗЖ-АвиФлуВак» обладает высокой иммуногенной активностью против актуального для России в 2023 г. вируса высокопатогенного гриппа птиц подтипа H5N1.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Vaccination against high-pathogenicity avian influenza (HPAI) is a well-proven way to control the disease. Inactivated whole-virion products are the most popular among the influenza vaccines. It is important to study immunogenicity of “ARRIAH-AviFluVac” vaccine against currently circulating HPAI viruses.</p></sec><sec><title>Objective</title><p>Objective. To assess immunogenic activity of “ARRIAH-AviFluVac” inactivated vaccine against high-pathogenicity avian influenza virus (H5N1 subtype) which was relevant for Russia in 2023.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. For testing purposes 4 vaccine dilutions were prepared containing whole and diluted H5 avian influenza virus antigen (1/25, 1/50 and 1/100). Each diluted sample was used to vaccinate a separate group of 4-week-old chickens. On day 28 post vaccination, the chickens were challenged with avian influenza virus A/gull/Kirov/998-1/2023 H5N1, which was isolated during an outbreak in the Russian Federation and was phylogenetically defined as high-pathogenicity agent belonging to the Asian genetic lineage of HPAI subtype H5 (clade 2.3.4.4b). Dead and sick chickens were reported in the infected groups for 6 days.</p></sec><sec><title>Results</title><p>Results. The chickens vaccinated with a whole antigen dose were found to be completely protected from the clinical signs after the challenge. A decrease in the antigen concentration in the vaccine volume decreased the vaccine-induced protection. The mortality rate after the challenge of control (intact) chickens was 10/10. An analysis of the dependence of the vaccine protectivity on the volume of the antigen immunizing dose showed that one inoculation dose contained 97 PD50. An analysis of the link between protection and strength of the post-vaccination humoral immunity allowed to calculate that the expected mean antibody titer in the group, which corresponds to 90% protection in the vaccinated birds, was 5.7 log2 , or ≈ 1:52.</p></sec><sec><title>Conclusion</title><p>Conclusion. “ARRIAH-AviFluVac” vaccine demonstrates high immunogenicity against </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>высокопатогенный вирус гриппа птиц</kwd><kwd>инактивированные вакцины</kwd><kwd>доза антигена в вакцине</kwd><kwd>протективный эффект вакцины</kwd></kwd-group><kwd-group xml:lang="en"><kwd>high-pathogenicity avian influenza</kwd><kwd>inactivated vaccines</kwd><kwd>antigen dose in the vaccine</kwd><kwd>vaccine protective effect</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена за счет средств ФГБУ «ВНИИЗЖ» в рамках тематики научно-исследовательских работ «Ветеринарное благополучие».</funding-statement><funding-statement xml:lang="en">The study was funded by the Federal Centre for Animal Health as a part of research activities “Veterinary Welfare”.</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">Маилян Э. 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