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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-2022-11-3-262-267</article-id><article-id custom-type="elpub" pub-id-type="custom">veterinary-660</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 | БИОТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES | BIOTECHNOLOGY</subject></subj-group></article-categories><title-group><article-title>Оптимизация состава питательной среды и изучение стадий роста изолята «Калуга 2020» Mycoplasma bovis</article-title><trans-title-group xml:lang="en"><trans-title>Optimization of medium composition and study of growth stages of Mycoplasma bovis “Kaluga 2020” isolate</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1210-0303</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абед Алхуссен</surname><given-names>М.</given-names></name><name name-style="western" xml:lang="en"><surname>Abed Alhussen</surname><given-names>M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абед Алхуссен Мохаммад, аспирант департамента ветеринарной медицины аграрно-технологического института</p><p>117198, Москва, ул. Миклухо-Маклая, 6</p></bio><bio xml:lang="en"><p>Mohammad Abed Alhussen, Post-Graduate Student, Department of Veterinary Medicine, Agrarian and Technological Institute</p><p>Moscow</p></bio><email xlink:type="simple">alhussenmohammed85@hotmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4288-1964</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нестеров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nesterov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нестеров Александр Александрович, кандидат ветеринарных наук, старший научный сотрудник референтной лаборатории болезней крупного рогатого скота</p><p>г. Владимир</p></bio><bio xml:lang="en"><p>Alexander А. Nesterov, Candidate of Science (Veterinary Medicine), Senior Researcher, Reference Laboratory for Bovine Diseases</p><p>Vladimir</p></bio><email xlink:type="simple">nesterov@arriah.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5982-3675</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Спрыгин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sprygin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Спрыгин Александр Владимирович, кандидат биологических наук, старший научный сотрудник референтной лаборатории болезней крупного рогатого скота</p><p>г. Владимир</p></bio><bio xml:lang="en"><p>Alexander V. Sprygin, Candidate of Science (Biology), Senior Researcher, Reference Laboratory for Bovine Diseases</p><p>Vladimir</p></bio><email xlink:type="simple">sprygin@arriah.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6132-5771</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шумилова</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Shumilova</surname><given-names>I. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шумилова Ирина Николаевна, кандидат ветеринарных наук, старший научный сотрудник референтной лаборатории болезней крупного рогатого скота</p><p>г. Владимир</p></bio><bio xml:lang="en"><p>Irina N. Shumilova, Candidate of Science (Veterinary Medicine), Senior Researcher, Reference Laboratory for Bovine Diseases</p><p>Vladimir</p></bio><email xlink:type="simple">shumilova@arriah.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Брянцева</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Bryantseva</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Брянцева Мария Сергеевна, ведущий биолог лаборатории профилактики болезней свиней и рогатого скота</p><p>г. Владимир</p></bio><bio xml:lang="en"><p>Maria S. Bryantseva, Leading Biologist, Laboratory for Porcine and Horned Livestock Prevention</p><p>Vladimir</p></bio><email xlink:type="simple">bryantseva@arriah.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8326-7151</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бьядовская</surname><given-names>О. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Byadovskaya</surname><given-names>O. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бьядовская Ольга Петровна, кандидат биологических наук, заведующий референтной лабораторией болезней крупного рогатого скота</p><p>г. Владимир</p></bio><bio xml:lang="en"><p>Olga P. Byadovskaya, Candidate of Science (Biology), Head of Reference Laboratory for Bovine Diseases</p><p>Vladimir</p></bio><email xlink:type="simple">bjadovskaya@arriah.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАОУ ВО «Российский университет дружбы народов» (РУДН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>People’s Friendship Universityof Russia (RUDN University)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУ «Федеральный центр охраны здоровья животных» (ФГБУ «ВНИИЗЖ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FGBI “Federal Centrefor Animal Health” (FGBI “ARRIAH”)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>19</day><month>09</month><year>2022</year></pub-date><volume>11</volume><issue>3</issue><fpage>262</fpage><lpage>267</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Абед Алхуссен М., Нестеров А.А., Спрыгин А.В., Шумилова И.Н., Брянцева М.С., Бьядовская О.П., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Абед Алхуссен М., Нестеров А.А., Спрыгин А.В., Шумилова И.Н., Брянцева М.С., Бьядовская О.П.</copyright-holder><copyright-holder xml:lang="en">Abed Alhussen M., Nesterov A.A., Sprygin A.V., Shumilova I.N., Bryantseva M.S., Byadovskaya O.P.</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/660">https://veterinary.arriah.ru/jour/article/view/660</self-uri><abstract><p>Mycoplasma bovis является одним из возбудителей микоплазмозов крупного рогатого скота, вызывающим респираторные болезни, мастит, артрит и кератоконъюнктивит. В статье представлены результаты исследования по оптимизации компонентного состава питательной среды для культивирования изолята «Калуга 2020» Mycoplasma bovis, а также изучения стадий роста возбудителя. Для определения активности микоплазм использовали метод измерения цветоизменяющих единиц и культуральный метод с подсчетом колониеобразующих единиц. Установлено, что при культивировании в оптимизированной питательной среде на основе модифицированного бульона Хейфлика микроорганизм вступает в фазу логарифмического роста по истечении первых 24 ч роста, через 72 ч культура микоплазм переходит в стабильный период, а через 84 ч регистрируется фаза спада. Влияние процентного содержания глюкозы, свежего дрожжевого экстракта и сыворотки крови лошади в питательной среде на накопление изолята «Калуга 2020» Mycoplasma bovis оценивали с использованием метода «один фактор за раз». Было установлено, что наибольшее влияние на накопление микоплазм оказывало содержание в питательной среде таких факторов роста, как свежий дрожжевой экстракт и сыворотка крови лошади (p &lt; 0,05), в то время как изменение количества глюкозы не стимулировало рост Mycoplasma bovis. В результате проведенных исследований определен подходящий состав и подобрано оптимальное содержание факторов роста в среде для культивирования изолята «Калуга 2020» Mycoplasmabovis: 12,5% свежего дрожжевого экстракта и 25% сыворотки крови лошади. Применение оптимизированной питательной среды на основе модифицированного бульона Хейфлика позволило увеличить накопление биомассы микоплазм в 5 раз (3,98 × 109  КОЕ/мл) по сравнению со стандартной средой (0,79 × 109  КОЕ/мл).</p></abstract><trans-abstract xml:lang="en"><p>Mycoplasma bovis is considered one of bovine mycoplasmosis pathogens responsible for respiratory diseases, mastitis, arthritis and keratoconjunctivitis. The paper presents results of the study on optimizing the component composition of the culture medium for Mycoplasma bovis “Kaluga 2020” isolate, as well as the study of this pathogen’s growth stages. The color-changing units assay and the culture method combined with colony-forming unit quantification were used for determination of Mycoplasma activity. It was found that when cultured in an optimized nutrient medium based on modified Hayflick broth, the microorganism enters a logarithmic growth phase after first 24 hours ofgrowth, in 72 hours the Mycoplasma culture enters astability phase, and adecline phase is recorded in 84 hours. The effect of percentage content of glucose, fresh yeast extract and horse serum in the nutrient medium on accumulation of Mycoplasma bovis “Kaluga2020” isolate was evaluated using the one-factor-at-a-time approach. It was found that the greatest effect on Mycoplasma accumulation was exerted by such growth factors as fresh yeast extract and horse serum in the nutrient medium (p &lt; 0.05), while changes in the amount of glucose did not stimulate Mycoplasma bovis growth. Based on results of the conducted studies, the appropriate composition was determined and the optimal content of growth factors in the medium for culturing Mycoplasma bovis “Kaluga 2020” isolate was selected: 12.5%of fresh yeast extract and 25% of horse serum. The use of the optimized nutrient medium based on modified Hayflick broth allowed 5-fold increase in accumulation of Mycoplasma biomass (3.98 × 109CFU/ml)compared to the standard medium (0.79 × 109CFU/ml).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Mycoplasma bovis</kwd><kwd>крупный рогатый скот</kwd><kwd>изолят «Калуга 2020»</kwd><kwd>оптимизация</kwd><kwd>питательные среды</kwd><kwd>колониеобразующие единицы (КОЕ)</kwd><kwd>цветоизменяющая единица (ЦИЕ)</kwd><kwd>биологическая активность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Mycoplasma bovis</kwd><kwd>cattle</kwd><kwd>“Kaluga 2020” isolate</kwd><kwd>optimization</kwd><kwd>nutrient media</kwd><kwd>colony-forming units (CFU)</kwd><kwd>color-changing unit (CCU)</kwd><kwd>biological activity</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">Абед Алхуссен М., Нестеров А. А., Кирпиченко В. В., Яцентюк С. 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