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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/issn2072-2419.2025.3.188</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1806</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>Морфометрические параметры эритроцитов цыплят под влиянием Энрофлоксацина в условиях in vitro: дозозависимый эффект</article-title><trans-title-group xml:lang="en"><trans-title>Morphometric parameters of chicken erythrocytes under the influence of Enrofloxacin in vitro: dose-dependent effect</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>Prisnyi</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р биол. наук, гл. науч. сотр. Белгородского филиала ВИЭВ</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 НИУ «БелГУ» </p></bio><bio xml:lang="en"><p>Kand. Biol. Sci., associate professor "Belgorod State National Research University" </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/0000-0002-9629-0000</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 Белгородского филиала ВИЭВ </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/0000-0001-9380-4136</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юрин</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yurin</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, вед. науч. сотр. </p></bio><bio xml:lang="en"><p>Leading 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 и Я.Р. Коваленко РАН»;&#13;
ФГАОУ ВО «Белгородский государственный национальный исследовательский университет» (НИУ «БелГУ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FGBNU "Federal Scientific Centre - All-Russian Research Institute of Experimental Veterinary Medicine named after K.I. Scriabin and Ya.R. Kovalenko of Russian Academy of Sciences";&#13;
Federal State Autonomous Educational Institution 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>07</day><month>01</month><year>2026</year></pub-date><volume>0</volume><issue>3</issue><fpage>188</fpage><lpage>194</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Присный А.А., Гребцова Е.А., Скворцов В.Н., Юрин Д.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Присный А.А., Гребцова Е.А., Скворцов В.Н., Юрин Д.В.</copyright-holder><copyright-holder xml:lang="en">Prisnyi A.A., Grebtsova E.A., Skvortsov V.N., Yurin D.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://vetjournal.spbguvm.ru/jour/article/view/1806">https://vetjournal.spbguvm.ru/jour/article/view/1806</self-uri><abstract><p>Фторхинолоновые препараты могут оказывать влияние на клетки организма млекопитающих и птиц. Одним из ключевых механизмов такого воздействия является способность фторхинолонов индуцировать окислительный стресс за счет генерации активных форм кислорода, что приводит к повреждению клеточных структур. В представленном исследовании изучено влияние различных концентраций энрофлоксацина на морфометрические параметры эритроцитов цыплят кросса «Хайсекс Браун» in vitro. Энрофлоксацин, представитель фторхинолонов, обладает не только антибактериальными свойствами, но и способен индуцировать окислительный стресс, приводя к повреждению клеточных структур. Отбор крови проводили методом внутрисердечной пункции. Отобранные пробы стабилизировали с использованием гепарина. Инкубацию эритроцитов в растворах осуществляли в течение 60 секунд, после чего изготавливали мазок на обезжиренном стекле. В мазках, окрашенных по Романовскому-Гимзе, оценены размеры длинной и короткой осей клеток и их ядер. Оценены изменения объема, площади поверхности эритроцитов, а также ядерноцитоплазматического отношения под действием энрофлоксацина в концентрациях 0,05%, 50 мкл/л, 5 мкл/л, 0,5 мкл/л и 0,3 мкл/л. Контрольные группы включали эритроциты в аутологичной плазме и изотоническом растворе (0,93% NaCl) без добавления антимикробного препарата. Энрофлоксацин вызывает дозозависимые изменения морфологии эритроцитов. Наибольшее увеличение объема (более 20%) и площади поверхности (14%) зафиксированы при концентрациях 5 мкл/л и 0,05%. При терапевтической дозе (0,3 мкл/ л) изменения были менее выражены (увеличение объема на 11%, площади на 7%). Парадоксальное снижение эффекта при увеличении концентрации до 50 мкл/л обусловлено нелинейной зависимостью токсичности фторхинолонов от дозы. Уменьшение ядерно-цитоплазматического на 23% в группах с 0,1% и 10 мкл/л обусловлено преимущественно набуханием клетки.</p></abstract><trans-abstract xml:lang="en"><p>Fluoroquinolone drugs can affect the cells of the mammalian and avian body. One of the key mechanisms of this effect is the ability of fluoroquinolones to induce oxidative stress by generating reactive oxygen species, which can lead to damage to cellular structures. The study investigated the effects of various concentrations of enrofloxacin on morphometric parameters of erythrocytes from «Hisex Brown» chickens in vitro. Enrofloxacin, a fluoroquinolone antibiotic, exhibits not only antibacterial properties but can also induce oxidative stress leading to cellular structural damage. Blood samples were collected via cardiac puncture and stabilized with heparin. Erythrocytes were incubated in test solutions for 60 seconds, followed by preparation of blood smears on degreased slides. Romanowsky-Giemsa stained smears were used to measure major and minor axes of cells and their nuclei. Changes in erythrocyte volume, surface area, and nuclearcytoplasmic ratio were evaluated following exposure to enrofloxacin at concentrations of 0.05%, 50 μl/l, 5 μl/l, 0.5 μl/l, and 0.3 μl/l. Control groups included erythrocytes in autologous plasma and isotonic saline (0.93% NaCl) without enrofloxacin. Enrofloxacin induced dose-dependent alterations in erythrocyte morphology. The most significant increases in cell volume (&gt;20%) and surface area (14%) were observed at concentrations of 5 μl/l and 0.05%. The therapeutic dose (0.3 μl/l) produced less pronounced changes (11% increase in volume, 7% in surface area). The paradoxical reduction of effect at higher concentration (50 μl/ l) may be attributed to the nonlinear doseresponse toxicity characteristic of fluoroquinolones. The 23% decrease in nuclearcytoplasmic ratio observed at 0.1% and 10 μl/l concentrations was primarily due to cellular swelling.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>цыплята</kwd><kwd>кровь</kwd><kwd>эритроциты</kwd><kwd>энрофлоксацин</kwd><kwd>морфометрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chickens</kwd><kwd>blood</kwd><kwd>red blood cells</kwd><kwd>enrofloxacin</kwd><kwd>morphometry</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">Dönmez, F. Investigation of the Effects of Three Different Generations of Fluoroquinolone Derivatives on Erythrocyte Fragility and Hematological Parameters in Rats / F. Dönmez, A. Doğan // Van Sağlık Bilimleri Dergisi. – 2023. – V. 16(3). – P. 237-243. doi: 10.52976/vansaglik.1330882.</mixed-citation><mixed-citation xml:lang="en">Dönmez, F. 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