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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">biob</journal-id><journal-title-group><journal-title xml:lang="ru">Биобезопасность и Биотехнология</journal-title><trans-title-group xml:lang="en"><trans-title>Biosafety and Biotechnology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2707-7241</issn><issn pub-type="epub">2957-5702</issn><publisher><publisher-name>Научно-исследовательский институт проблем биологической безопасности</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.58318/2957-5702-2025-23-22-28</article-id><article-id custom-type="elpub" pub-id-type="custom">biob-201</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>СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>АНТИТЕЛЬНЫЙ ОТВЕТ НА TRYPANOSOMA EVANSI У ВЕРБЛЮДОВ КАЗАХСТАНА</article-title><trans-title-group xml:lang="en"><trans-title>ANTIBODY RESPONSE TO TRYPANOSOMA EVANSI IN CAMELS OF KAZAKHSTAN</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>Кудайбергенова</surname><given-names>Ж.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudaibergenova</surname><given-names>Zhadra</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абай</surname><given-names>Ж.</given-names></name><name name-style="western" xml:lang="en"><surname>Abay</surname><given-names>Zhandos</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><email xlink:type="simple">abaizh097@mail.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>Айтлесова</surname><given-names>Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Aitlessova</surname><given-names>Roza</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шыныбаев</surname><given-names>К.</given-names></name><name name-style="western" xml:lang="en"><surname>Shynybayev</surname><given-names>Kuandyk</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Касенов</surname><given-names>М.</given-names></name><name name-style="western" xml:lang="en"><surname>Kassenov</surname><given-names>Markhabat</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нурпейсова</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nurpeisova</surname><given-names>Ainur</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ТОО «Казахский научно-исследовательский ветеринарный институт»; Казахский национальный аграрный исследовательский университет<country>Казахстан</country></aff><aff xml:lang="en">Kazakh Scientific Research Veterinary Institute LLP; Kazakh National Agrarian Research University<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">ТОО «Казахский научно-исследовательский ветеринарный институт»<country>Россия</country></aff><aff xml:lang="en">Kazakh Scientific Research Veterinary Institute LLP<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>12</day><month>02</month><year>2026</year></pub-date><volume>1</volume><issue>23</issue><issue-title>№23 (2025)</issue-title><fpage>22</fpage><lpage>28</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кудайбергенова Ж., Абай Ж., Айтлесова Р., Шыныбаев К., Касенов М., Нурпейсова А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Кудайбергенова Ж., Абай Ж., Айтлесова Р., Шыныбаев К., Касенов М., Нурпейсова А.</copyright-holder><copyright-holder xml:lang="en">Kudaibergenova Z., Abay Z., Aitlessova R., Shynybayev K., Kassenov M., Nurpeisova A.</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://journal.biosafety.kz/jour/article/view/201">https://journal.biosafety.kz/jour/article/view/201</self-uri><abstract><p>Болезнь су-ауру, вызываемая Trypanosoma evansi, является одним из основных ограничивающих факторов, влияющих на здоровье и продуктивность верблюдов в аридных и полуаридных регионах. Несмотря на значительную численность верблюдов в Казахстане, данные рецензируемых исследований по эпидемиологии су-ауру остаются ограниченными.</p><p>В 2024-2025 гг. было проведено поперечное сероэпидемиологическое исследование в двух верблюдоводческих регионах Казахстана – Мангистауской и Кызылординской областях. Образцы сыворотки крови (n = 2 745 в 2024 г.; n = 2 900 в 2025 г.) были исследованы на наличие антител к T. evansi с использованием реакции связывания комплемента (РСК) и формол-гель теста (ФГП). Серопревалентность рассчитывали с 95%-ными доверительными интервалами (ДИ), а региональные и временные различия оценивали с применением критерия χ² Пирсона.</p><p>В Мангистауской области распространённость по РСК снизилась с 5,0% (95% ДИ: 2,15-11,18) в 2024 г. до 0,78% (95% ДИ: 0,21-2,82) в 2025 г. (p = 0,0319), при этом доля положительных результатов ФГП сократилась с 65,0% до 5,88% (p &lt; 0,001). Напротив, в Кызылординской области распространённость по РСК достоверно возросла с 4,0% (95% ДИ: 3,32-4,82) до 8,88% (95% ДИ: 7,87-10,01; p &lt; 0,001), тогда как показатели ФГП увеличились незначительно – с 7,8% до 8,96% и не достигли статистической значимости (p = 0,1504).</p><p>Настоящее исследование представляет собой одну из первых систематических многолетних оценок циркуляции T. evansi среди верблюдов в Казахстане и выявляет контрастную региональную динамику, характеризующуюся резким снижением показателей в Мангистауской области и их значительным ростом в Кызылординской области. Полученные данные подчёркивают гетерогенный характер эпидемиологии су-ауру и указывают на необходимость продолжения эпидемиологического надзора и применения комбинированных диагностических подходов для разработки эффективных мер контроля.</p></abstract><trans-abstract xml:lang="en"><p>Surra, caused by Trypanosoma evansi, is a major constraint to camel health and productivity in arid and semi-arid regions. Despite Kazakhstan’s large camel population, peer-reviewed data on surra epidemiology remain scarce. </p><p>A cross-sectional seroepidemiological survey was conducted in two camel-breeding regions of Kazakhstan (Mangystau and Kyzylorda) during 2024 and 2025. Serum samples (n = 2,745 in 2024; n = 2,900 in 2025) were tested for anti-T. evansi antibodies using the complement fixation test (CFT) and the formol gel test (FGT). Seroprevalence was expressed with 95% confidence intervals (CI), and regional/temporal differences were assessed using Pearson’s chi-square test.</p><p>In Mangystau, CFT prevalence decreased from 5.0% (95% CI: 2.15–11.18) in 2024 to 0.78% (95% CI: 0.21–2.82) in 2025 (p = 0.0319), while FGT positivity declined from 65.0% to 5.88% (p &lt; 0.001). Conversely, in Kyzylorda, CFT prevalence increased significantly from 4.0% (95% CI: 3.32–4.82) to 8.88% (95% CI: 7.87–10.01; p &lt; 0.001), whereas FGT values rose slightly from 7.8% to 8.96% without statistical significance (p = 0.1504).</p><p>This study provides one of the first systematic multi-year assessments of T. evansi circulation in camels in Kazakhstan, revealing contrasting regional dynamics, with a sharp decline in Mangystau and a significant increase in Kyzylorda. These findings underscore the heterogeneous nature of surra epidemiology and highlight the need for continued surveillance and combined diagnostic approaches to inform control strategies. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>верблюд (Camelus dromedarius)</kwd><kwd>Trypanosoma evansi</kwd><kwd>сурра</kwd><kwd>антитела</kwd><kwd>реакция связывания комплемента (РСК)</kwd><kwd>формол-гелевая проба (ФГП)</kwd><kwd>сероэпидемиология</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Camel (Camelus dromedarius)</kwd><kwd>Trypanosoma evansi</kwd><kwd>Surra</kwd><kwd>Antibodies</kwd><kwd>Complement fixation test (CFT)</kwd><kwd>Formol gel test (FGT)</kwd><kwd>Seroepidemiology</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>This work was supported by the Science and Technology Program (IRN BR218004/0223) of the Ministry of Science and Higher Education of the Republic of Kazakhstan</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Aregawi, W. 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