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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">mimmun</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская иммунология</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Immunology (Russia)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1563-0625</issn><issn pub-type="epub">2313-741X</issn><publisher><publisher-name>SPb RAACI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15789/1563-0625-IBP-2278</article-id><article-id custom-type="elpub" pub-id-type="custom">mimmun-2441</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>МАТЕРИАЛЫ ФОРУМА "ДНИ ИММУНОЛОГИИ В СПБ" 2021</subject></subj-group></article-categories><title-group><article-title>ИММУНОБИОЛОГИЧЕСКИЕ СВОЙСТВА ВАГИНАЛЬНОГО СЕКРЕТА У ЗДОРОВЫХ И БОЛЬНЫХ МИКОПЛАЗМОЗОМ КОРОВ</article-title><trans-title-group xml:lang="en"><trans-title>IMMUNO-BIOLOGICAL PROPERTIES OF VAGINAL DISCHARGE IN HEALTHY AND MYCOPLASMOSIS-INFECTED COWS</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>Васильев</surname><given-names>Р. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasiliev</surname><given-names>R. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p> к.вет.н., доцент, доцент кафедры клинической диагностики,</p><p>196084, Санкт-Петербург, ул. Черниговская, 5</p></bio><bio xml:lang="en"><p>PhD (Veterinary medicine), Associate Professor, Department of Department of Clinical Diagnostics, </p><p>196084, St. Petersburg, Chernigovskaya str., 5</p></bio><email xlink:type="simple">rmvpcrvet@yandex.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>Васильева</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasilieva</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.вет.н., доцент, доцент кафедры биохимии и физиологии,</p><p>196084, Санкт-Петербург, ул. Черниговская, 5</p></bio><bio xml:lang="en"><p>PhD (Veterinary medicine), Associate Professor, Department of Biochemistry and Physiology</p><p>196084, St. Petersburg, Chernigovskaya str., 5</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>St. Petersburg State University of Veterinary Medicine</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>19</day><month>10</month><year>2021</year></pub-date><volume>23</volume><issue>4</issue><fpage>987</fpage><lpage>990</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Васильев Р.М., Васильева С.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Васильев Р.М., Васильева С.В.</copyright-holder><copyright-holder xml:lang="en">Vasiliev R.M., Vasilieva S.V.</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.mimmun.ru/mimmun/article/view/2441">https://www.mimmun.ru/mimmun/article/view/2441</self-uri><abstract><p>Генитальный микоплазмоз у коров – заболевание, сопровождающееся латентным течением, что затрудняет его своевременную диагностику и назначение адекватной терапии. Неспецифическая симптоматика микоплазмоза в совокупности с периодами бессимптомного течения приводит к развитию функциональных и морфологических изменений в органах половой системы коров, заканчивающихся в итоге бесплодием. Мониторинговые исследования животноводческих хозяйств Северо-Западного региона РФ показали, что инфицированность гениталий коров микоплазмами может составлять от 20% до 40% поголовья. Причем прослеживается четкая зависимость между высокой инфицированностью поголовья и низкими показателями воспроизводства. В связи с этим животноводческие предприятия несут существенный экономический ущерб. Одним из важных механизмов, предотвращающих внедрение различных патогенов в репродуктивный тракт, является резистентность слизистой оболочки влагалища. Среди этих факторов наиболее важная роль отводится вагинальной аутофлоре, десквамации эпителия, фагоцитозу, кислотности вагинального секрета, содержанию в нем иммуноглобулинов, лизоцима и ряду других неспецифических факторов защиты. Нами было проведено изучение изменения иммунобиологических характеристик вагинального секрета при субклиническом течении генитального микоплазмоза. Для исследования были отобраны здоровые коровы с отрицательным PCR-тестом на Mycoplasma spp. и инфицированные Mycoplasma spp., без клинических признаков вагинита. У обеих групп животных проводили определение в вагинальном секрете концентрации водородных ионов, активности лизоцима и иммуноглобулинов классов IgG, IgM, IgA и sIgA. Несмотря на то, что персистенция микоплазм во влагалище не сопровождается выраженными клиническими признаками вагинита, но состояние факторов защиты слизистой оболочки претерпевает значительные изменения. Проведенные исследования позволили установить, что длительное нахождение микоплазм во влагалище коров проявляется достоверным увеличением концентрации водородных ионов на 41% и снижением лизоцимной активности вагинального секрета в 2 раза, то есть наблюдается угнетение основных факторов предотвращающих колонизацию слизистой патогенной микрофлорой. Кроме того, происходит перераспределение классов иммуноглобулинов в вагинальном секрете. Это проявляется достоверным увеличением содержания IgM и sIgA на фоне тенденции к снижению IgA. Отмеченные изменения в совокупности создают благоприятные условия для внедрения секундарной микрофлоры и развитию бактериально-микоплазменных вагинитов, усугубляющих морфофункциональные изменения в репродуктивном тракте и повышающих риск возникновения бесплодия. </p></abstract><trans-abstract xml:lang="en"><p>Genital mycoplasmosis in cows is a disease accompanied by a latent course, which complicates its timely diagnosis and the appointment of adequate therapy. The nonspecific symptomatology of mycoplasmosis, combined with periods of asymptomatic course, leads to the development of functional and morphological changes in the organs of the reproductive system of cows, resulting in infertility. Monitoring studies of livestock farms in the North-West region of the Russian Federation have shown that infection of the genitals of cows with mycoplasmas can be from 20 to 40% of the livestock. Moreover, there is a clear relationship between the high infection rate of the livestock and low reproduction rates. In this regard, livestock enterprises incur significant economic damage. One of the important mechanisms preventing the introduction of various pathogens into the reproductive tract is the resistance of the vaginal mucosa. Among these factors, the most important role is assigned to vaginal autoflora, epithelial desquamation, phagocytosis, acidity of vaginal secretions, the content of immunoglobulins, lysozyme and a number of other nonspecific protective factors in it. We studied the changes in the immuno-biological characteristics of vaginal secretions in the subclinical course of genital mycoplasmosis. Healthy cows with a negative PCR test for Mycoplasma spp. were selected for the study. and infected with Mycoplasma spp., without clinical signs of vaginitis. In both groups of animals, the concentration of hydrogen ions, the activity of lysozyme and immunoglobulins of the classes IgG, IgM, IgA and sIgA were determined in the vaginal secretions. Despite the fact that the persistence of mycoplasmas in the vagina is not accompanied by pronounced clinical signs of vaginitis, but the state of protective factors the mucous membrane undergoes significant changes. The conducted studies made it possible to establish that the long-term presence of mycoplasmas in the vagina of cows is manifested by a significant increase in the concentration of hydrogen ions by 41% and a decrease in the lysozyme activity of vaginal secretions by 2 times, that is, inhibition of the main factors preventing the colonization of mucous pathogenic microflora is observed. In addition, there is a redistribution of classes of immunoglobulins in the vaginal secretion. This is manifested by a significant increase in the content of IgM and sIgA against the background of a tendency towards a decrease in IgA. The noted changes in aggregate create favorable conditions for the introduction of secondary microflora and the development of bacterial-mycoplasma vaginitis, aggravating morpho-functional changes in the reproductive tract and increasing the risk of infertility. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>коровы</kwd><kwd>иммуноглобулины</kwd><kwd>вагинальный секрет</kwd><kwd>микоплазмоз</kwd><kwd>лизоцим</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cows</kwd><kwd>immunoglobulins</kwd><kwd>vaginal secretions</kwd><kwd>mycoplasmosis</kwd><kwd>lysozyme</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">Corbeil L.B., Bier P. J., Duncan J.R. Immune response to genital mycoplasmosis in bulls. 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