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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">vetpress</journal-id><journal-title-group><journal-title xml:lang="ru">Аграрная наука</journal-title><trans-title-group xml:lang="en"><trans-title>Agrarian science</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-8155</issn><issn pub-type="epub">2686-701X</issn><publisher><publisher-name>Редакция журнала "Аграрная наука"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32634/0869-8155-2021-350-6-6-11</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-1680</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>ВЕТЕРИНАРНАЯ МИКРОБИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>VETERINARY MICROBIOLOGY</subject></subj-group></article-categories><title-group><article-title>Оценка жизнеспособности культур молочнокислых микроорганизмов при их замораживании и низкотемпературном хранении</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the viability of cultures of lactic acid microorganisms during their freezing and low-temperature storage</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малик</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Malik</surname><given-names>Nina I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123022, Москва, Звенигородское шоссе, д. 5</p></bio><bio xml:lang="en"><p>Zvenigorodskoye shosse 5, 123022, Moscow</p></bio><email xlink:type="simple">nimalik@vgnki.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гулейчик</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Guleychik</surname><given-names>Irina A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123022, Москва, Звенигородское шоссе, д. 5</p></bio><bio xml:lang="en"><p>Zvenigorodskoye shosse 5, 123022, Moscow</p></bio><email xlink:type="simple">nimalik@vgnki.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малик</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Malik</surname><given-names>Evgeny V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123022, Москва, Звенигородское шоссе, д. 5</p></bio><bio xml:lang="en"><p>Zvenigorodskoye shosse 5, 123022, Moscow</p></bio><email xlink:type="simple">nimalik@vgnki.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чупахина</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Chupahina</surname><given-names>Nataliya A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123022, Москва, Звенигородское шоссе, д. 5</p></bio><bio xml:lang="en"><p>Zvenigorodskoye shosse 5, 123022, Moscow</p></bio><email xlink:type="simple">nimalik@vgnki.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Русанов</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rusanov</surname><given-names>Ivan A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123022, Москва, Звенигородское шоссе, д. 5</p></bio><bio xml:lang="en"><p>Zvenigorodskoye shosse 5, 123022, Moscow</p></bio><email xlink:type="simple">nimalik@vgnki.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Самохвалова</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Samohvalova</surname><given-names>Nadezhda S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123022, Москва, Звенигородское шоссе, д. 5</p></bio><bio xml:lang="en"><p>Zvenigorodskoye shosse 5, 123022, Moscow</p></bio><email xlink:type="simple">nimalik@vgnki.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сафронова</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Safronova</surname><given-names>Vera I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>196608, Санкт-Петербург, Пушкин-8, ш. Подбельского, 3</p></bio><bio xml:lang="en"><p>Podbelsky chausse 3, Saint-Petersburg, Pushkin 8, 196608</p></bio><email xlink:type="simple">v.savronova@rambler.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский государственный Центр качества и стандартизации лекарственных средств для животных и кормов ФГБУ «ВГНКИ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Budgetary Institution «The Russian State Center for Animal Feed and Drug Standardization and Quality»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский НИИ сельскохозяйственной микробиологии</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Budgetary Scientific Institution «All-Russia Institute for Agricultural Microbiology»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>20</day><month>07</month><year>2021</year></pub-date><volume>0</volume><issue>6</issue><fpage>6</fpage><lpage>11</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Малик Н.И., Гулейчик И.А., Малик Е.В., Чупахина Н.А., Русанов И.А., Самохвалова Н.С., Сафронова В.И., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Малик Н.И., Гулейчик И.А., Малик Е.В., Чупахина Н.А., Русанов И.А., Самохвалова Н.С., Сафронова В.И.</copyright-holder><copyright-holder xml:lang="en">Malik N.I., Guleychik I.A., Malik E.V., Chupahina N.A., Rusanov I.A., Samohvalova N.S., Safronova V.I.</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://www.vetpress.ru/jour/article/view/1680">https://www.vetpress.ru/jour/article/view/1680</self-uri><abstract><p>Актуальность. Значительный рост микробиомассоциированных болезней, тесно связанных с нарушениями бактериального разнообразия и функций нормальной кишечной микробиоты, диктует необходимость разработки и осуществления мер по длительному сохранению отдельных представителей нормальной микробиоты с целью создания новых стратегий для модуляции состава микробиомов.Методы. Изучено влияние технологии глубокого замораживания и хранения кишечных изолятов молочнокислых бактерий 2 таксономических групп, выделенных от птицы, в условиях Станции низкотемпературного автоматизированного хранения биологических образцов Ведомственной коллекции полезных микроорганизмов сельскохозяйственного назначения Россельхозакадемии (ВКСМ) на среде культивирования MRS с использованием в качестве криоконсервантов 10 и 20% глицерина или 10 и 20% сахарозы. Взвеси изолятов замораживали при -150 °С в течение 18 час и затем размещали в автоматизированное криохранилище при -80 °С. Контроль образцов на сохранность живых клеток и функциональную активность культур молочнокислых бактерий проводили после замораживания при -150 °С перед помещением в криохранилище и далее в динамике хранения при температуре -80 °С через 4, 9 и 18 мес хранения.Результаты. Технология криозамораживания молочнокислых бактерий на MRS-бульоне с использованием в качестве криоконсервантов 10 и 20% глицерина или 10 и 20% сахарозы, позволяет сохранять жизнеспособность, физиологические и биохимические свойства кишечных изолятов молочнокислых бактерий при хранении в течение 18 мес. Все использованные защитные среды (MRS -бульон с глицерином 10 и 20%, MRS-бульон с сахарозой 10 и 20%) показали сравнимые результаты по сохранности жизнеспособности и кислотообразующей активности изолятов Lactobacillus fermentum-2, Pediococcus pentosaceus 6п-3, Pediococcus pentosaceus 28п-1. Тогда хранение изолята Pediococcus pentosaceus (28п-1) в заданном параметре на защитной среде с 10 и 20% сахарозы привело к снижению активности кислотообразования.</p></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. A significant increase in microbiome-associated diseases, closely related to violations of the bacterial diversity and functions of the normal intestinal microbiota, dictates the need to develop and implement measures for the long-term preservation of individual representatives of the normal microbiota in order to create new strategies for modifying the composition of microbiomes.Methods. The influence of the technology of deep freezing and storage of intestinal isolates of lactic acid bacteria of 2 taxonomic groups isolated from poultry in the conditions of the Low-temperature automated storage of biological samples of the Departmental Collection of useful microorganisms for Agricultural purposes of the Russian Agricultural Academy (VKSM) on the MRS culture medium using 10 and 20% glycerin or 10 and 20% sucrose as cryopreservants was studied. The suspensions of the isolates were frozen at - 150 °C for 18 hours and then placed in an automated cryopreservation at -80 °C. Control of samples for safety</p></sec><sec><title>Results</title><p>Results. The technology of cryofreezing of lactic acid bacteria on MRS-broth using 10 and 20% glycerin or 10 and 20% sucrose as cryopreservants allows preserving the viability, physiological and  biochemical properties of intestinal isolates of lactic acid bacteria when stored for 18 months. All the protective media used (MRS-broth with glycerin 10 and 20%, MRS -broth with sucrose 10 and 20%) showed comparable results in the preservation of viability and acid-forming activity of Lactobacillus fermentum-2, Pediococcus pentosaceus 6p-3, Pediococcus pentosaceus 28p-1 isolates. Then the storage of Pediococcus pentosaceus isolate (28p-1) in a given parameter on a protective medium with 10 and 20% sucrose led to a decrease in the activity of acid formation.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>криоконсервация</kwd><kwd>молочнокислые бактерии</kwd><kwd>криопротекторы</kwd><kwd>микробиота</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cryopreservation</kwd><kwd>lactic acid bacteria</kwd><kwd>cryoprotectors</kwd><kwd>microbiota</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Morris G. J. 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