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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/issn2072-2419.2025.2.105</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1694</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>ФАРМАКОЛОГИЯ, ТОКСИКОЛОГИЯ, ФАРМАЦИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHARMACOLOGY, TOXICOLOGY, PHARMACY</subject></subj-group></article-categories><title-group><article-title>Мембранный резерв эритроцитов утят под действием ципрофлоксацина в условиях экспериментальной стафилококковой инфекции</article-title><trans-title-group xml:lang="en"><trans-title>Membrane reserve of ducklings' erythrocytes under the influence of ciprofloxacin in conditions of experimental staphylococcal infection</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>Присный</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Prisny</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р биол. наук, глав. науч. сотр. </p></bio><bio xml:lang="en"><p>Dr. Biol. Sci., Principal Researcher FGBNU "Federal Scientific Centre VIEV"</p></bio><email xlink:type="simple">andreyprisny@gmail.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/0009-0007-0768-0490</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гребцова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Grebtsova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, доц. каф. биологии </p></bio><bio xml:lang="en"><p>Kand. Biol. Sci., associate professor </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/0000-0002-9629-0000</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скворцов</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Skvortsov</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р ветеринар. наук, руководитель </p></bio><bio xml:lang="en"><p>Dr. Vet. sci., Head of Belgorod Department of FGBNU "Federal Scientific Centre VIEV" </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/0000-0003-1340-8024</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кравцова</surname><given-names>А. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Kravtsova</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>мл. науч. сотр. </p></bio><bio xml:lang="en"><p>Junior Researcher</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «Федеральный научный центр – Всероссийский научно-исследовательский институт экспериментальной ветеринарии имени К.И. Скрябина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Autonomous EducationalInstitution of Higher Education «Belgorod State National Research University»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГАОУ ВО «Белгородский государственный национальный исследовательский университет» (НИУ «БелГУ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Autonomous EducationalInstitution of Higher Education «Belgorod State National Research University»</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>105</fpage><lpage>111</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Присный А.А., Гребцова Е.А., Скворцов В.Н., Кравцова А.Р., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Присный А.А., Гребцова Е.А., Скворцов В.Н., Кравцова А.Р.</copyright-holder><copyright-holder xml:lang="en">Prisny A.A., Grebtsova E.A., Skvortsov V.N., Kravtsova A.R.</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/1694">https://vetjournal.spbguvm.ru/jour/article/view/1694</self-uri><abstract><p>Изучено влияние ципрофлоксацина на мембранный резерв и устойчивость эритроцитов утят к действию гипотонической среды в условиях экспериментального стафилококкоза. Высокая проницаемость мембраны эритроцитов для ципрофлоксацина может приводить к изменению устойчивости красных клеток крови к условиям пониженной осмолярности. В исследовании было задействовано три группы, состоящие из утят башкирской породы в возрасте 21 суток. Птиц группы III в течение пяти суток выпаивали ципрофлоксацином в дозировке 200 мг/л. Через сутки после начала выпаивания препаратом осуществляли внутрибрюшинное заражение групп II и III культурой Staphylococcus aureus в концентрации 5McF. Отбор крови методом внутрисердечной пункции проводили на 1-е, 3-и, 6-е, 9-е, и 13-е сутки после заражения. Для оценки устойчивости эритроцитов к среде с пониженной осмолярностью инкубировали цельную кровь в изотоническом растворе (0,93% NaCl), в гипотоническом растворе (0,33% NaCl), в соотношении 1:1 в течение 30 секунд. В мазках крови определены линейные параметры эритроцитов, рассчитаны площадь поверхности и объем клеток, показатели мембранного резерва. Относительный мембранный резерв эритроцитов птиц контрольной группы в условиях гипотонии был наибольшим по сравнению с опытными группами. Это связано с изначальным увеличением размеров клеток птиц группы II и III под воздействием альфа-токсина St. aureus. Эритроциты интактных утят демонстрируют максимальную интенсивность использования относительного мембранного резерва в гипотонической среде – ииMR% находится в диапазоне между 19,4% и 33%. Во второй и третьей группе среднее значение ииMR% мембраны составляет 17%. Привлечение поверхностных резервов плазмалеммы к регуляции размеров эритроцитов, а также изменения, связанные с транспортом ионов и воды, предотвращают гемолиз. Использование внутриклеточного мембранного бассейна позволяет регулировать объем ядер при агрессивном действии альфа-гемолизина и ципрофлоксацина.</p></abstract><trans-abstract xml:lang="en"><p>The effect of ciprofloxacin on the membrane reserve and resistance of ducklings' erythrocytes to hypotonic environment in experimental staphylococcosis was studied. The high permeability of the erythrocyte membrane to ciprofloxacin can lead to a change in the resistance of red blood cells to conditions of reduced osmolarity. The study involved three groups consisting of Bashkir ducklings aged 21 days. Group III birds were treated with ciprofloxacin at a dosage of 200 mg/l for five days. A day after the start of antibiotic treatment, intraperitoneal infection of groups II and III with Staphylococcus aureus culture at a concentration of 5McF was performed. Intracardiac puncture blood sampling was performed on the 1st, 3rd, 6th, 9th, and 13th days after infection. To assess the resistance of red blood cells to hypoosmotic pressure, blood was incubated in an isotonic solution (0.93% NaCl), in a hypotonic solution (0.33% NaCl), in a ratio of 1:1 during 30 seconds. Linear parameters of erythrocytes were determined in blood smears, surface area and volume, and indicators of membrane reserve were calculated. The relative membrane reserve of erythrocytes in birds of the control group in conditions of hypoosmolarity was the highest compared with the experimental groups. This is due to the initial increase in the size of bird cells of groups II and III under the influence of alpha-toxin St. aureus. The erythrocytes of intact ducklings demonstrate the maximum intensity of use of the relative membrane reserve in a hypotonic environment – iuMR% is in the range between 19.4% and 33%. In the second and third groups, the average value of iuMR% of the membrane is 17%. The involvement of surface plasmalemma reserves in the regulation of red blood cell size, as well as changes associated with ion and water transport, prevent hemolysis. The use of an intracellular membrane pools makes it possible to regulate the volume of nuclei under the aggressive action of alphahemolysin and ciprofloxacin.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>утята</kwd><kwd>кровь</kwd><kwd>эритроциты</kwd><kwd>стафилококк</kwd><kwd>ципрофлоксацин</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ducklings</kwd><kwd>blood</kwd><kwd>red blood cells</kwd><kwd>Staphylococcus</kwd><kwd>ciprofloxacin</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">Malarkodi, K.P. Effect of lipoic acid on the oxidoreductive status of the red blood cells in rats subject to oxidative stress by chronic administration of adriamycin / K.P. Malarkodi, R. Siva Prasad, P. 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