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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">vniigis</journal-id><journal-title-group><journal-title xml:lang="ru">Российский паразитологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Parasitology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-8435</issn><issn pub-type="epub">2541-7843</issn><publisher><publisher-name>ВНИИП – филиал ФГБНУ ФНЦ ВИЭВ РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31016/1998-8435-2025-19-1-108-117</article-id><article-id custom-type="elpub" pub-id-type="custom">vniigis-1281</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>ЛЕЧЕНИЕ И ПРОФИЛАКТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TREATMENT AND PREVENTION</subject></subj-group></article-categories><title-group><article-title>Эффективность комбинированной терапии с использованием фенбендазола и Bacillus amyloliquefaciens при лечении стронгилятозов у лошадей</article-title><trans-title-group xml:lang="en"><trans-title>Efficacy of combined therapy with fenbendazole and Bacillus amyloliquefaciens in treating strongylatosis in horses</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9303-4100</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дёмкина</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Demkina</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дёмкина Ольга Владимировна - кандидат ветеринарных наук, доцент кафедры ветеринарно-санитарной экспертизы, эпизоотологии и микробиологии, SPIN-код: 4628-1555.</p><p>Благовещенск</p></bio><bio xml:lang="en"><p>Demkina Olga V. - Cand. in Vet. Sc., Associate Professor of the Department of Veterinary-Sanitary Examination, Epizootology and Microbiology, SPIN: 4628-1555.</p><p>Blagoveshchensk</p></bio><email xlink:type="simple">demkina-olsen@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Дальневосточный государственный аграрный университет (ДальГАУ)<country>Россия</country></aff><aff xml:lang="en">Far Eastern State Agrarian University (FESAU)<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>18</day><month>03</month><year>2025</year></pub-date><volume>19</volume><issue>1</issue><fpage>108</fpage><lpage>117</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дёмкина О.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Дёмкина О.В.</copyright-holder><copyright-holder xml:lang="en">Demkina O.V.</copyright-holder><license 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://vniigis.elpub.ru/jour/article/view/1281">https://vniigis.elpub.ru/jour/article/view/1281</self-uri><abstract><p>Цель исследований – оценить эффективность комбинированного применения фенбендазола и Bacillus amyloliquefaciens против стронгилят у лошадей, сравнить комбинированную терапию с монотерапией фенбендазолом, изучить влияние на общее клиническое состояние лошадей.</p><sec><title>Материалы и методы</title><p>Материалы и методы. Исследования проводили на 20 лошадях, разделенных на две группы по 10 голов. Лошади опытной группы получали фенбендазол в дозе 7,5 мг/кг, однократно и пробиотик B. amyloliquefaciens в дозе 50 мг/кг ежедневно в течение 14 сут. Контрольная группа лошадей получала только фенбендазол. Эффективность терапии контролировали исследованием фекалий методом флотации на 7, 10, 14, 16, 19, 22, 25, 28, 31 и 34-е сутки после лечения. На 14-е сутки опыта рассчитывали показатели теста снижения числа яиц в фекалиях. Для установления сроков начала повторного выделения яиц использовали показатели, полученные на 7-е и 14-е сутки. Анализ фекальной микробиоты проводили перед началом лечения и на 14-е сутки.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Обе группы лошадей показали снижение числа яиц стронгилят в фекалиях после лечения с постепенным нарастанием их числа к 34-м суткам опыта. Первые яйца стронгилят обнаружили на 7-е сутки терапии. Период повторного выделения яиц стронгилят в опытной и контрольной группах составил две недели. Показатель теста снижения числа яиц в фекалиях на 14-е сутки в обеих группах был ниже 90%. Анализ фекальной микробиоты не выявил значимых изменений после применения пробиотика, хотя у лошадей опытной группы исчезли грибы рода Aspergillus. В течение всего исследования лошади в обеих группах оставались клинически здоровыми без признаков желудочно-кишечных расстройств. Комбинированное применение фенбендазола и пробиотика B. amyloliquefaciens не привело к статистически значимому увеличению эффективности дегельминтизации по сравнению с использованием только фенбендазола (Р &gt; 0,05). Однако, совместное применение антигельминтика и пробиотика показало определённое биологическое преимущество, выраженное в снижении числа яиц стронгилят после лечения в опытной группе. Несмотря на отсутствие существенных изменений в микробиоте кишечника, отсутствие Aspergillus spp. после применения пробиотика может указывать на его потенциальное противогрибковое действие.</p></sec></abstract><trans-abstract xml:lang="en"><p>The purpose of the research is to evaluate the efficacy of the combined use of fenbendazole and Bacillus amyloliquefaciens against Strongylata in horses, to compare the combined therapy to fenbendazole monotherapy, and to study the effect on the general clinical state of horses.</p><sec><title>Materials and methods</title><p>Materials and methods. The study was conducted on 20 horses divided into two groups of 10 animals. The horses from the experimental group were given fenbendazole once at a dose of 7.5 mg/kg, and the probiotic B. amyloliquefaciens daily at a dose of 50 mg/kg for 14 days. The control group of horses received only fenbendazole. The therapy efficacy was monitored by examining faeces using the flotation method on days 7, 10, 14, 16, 19, 22, 25, 28, 31, and 34 after treatment. On day 14 of the experiment, the test reduction rates in the number of eggs in faeces were calculated. To determine starting dates of repeated egg release, the values obtained on days 7 and 14 were used. Faecal microbiota was analyzed before the treatment and on day 14.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. Both groups of horses showed a reduction in Strongylata eggs in faeces after treatment with a gradual increase in their number by day 34 of the experiment. The first Strongylata eggs were detected on day 7 of the therapy. The period of repeated release of Strongylata eggs was two weeks in the experimental and control groups. Test reduction rates of eggs in faeces were below 90% on day 14 in both groups. The analyzed faecal microbiota did not reveal significant changes after the probiotic, although Aspergillus fungi disappeared in the experimental horses. Throughout the study, the horses in both groups remained clinically healthy with no signs of gastrointestinal disorders. The combined fenbendazole and B. amyloliquefaciens did not result in any statistically significant increase in the deworming efficacy as compared to fenbendazole alone (P &gt; 0.05). However, the combined anthelmintic and probiotic showed a certain biological advantage expressed in a decrease in Strongylata eggs after the treatment in the experimental group. Despite the lack of significant changes in the intestinal microbiota, the absence of Aspergillus spp. after administered probiotic may indicate its potential antifungal effect.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>фенбендазол</kwd><kwd>Bacillus amyloliquefaciens</kwd><kwd>стронгилятозы</kwd><kwd>эффективность</kwd><kwd>лошади</kwd></kwd-group><kwd-group xml:lang="en"><kwd>fenbendazole</kwd><kwd>Bacillus amyloliquefaciens</kwd><kwd>strongylatosis</kwd><kwd>efficacy</kwd><kwd>horses</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">Берджи Р., Хоулт Дж., Криг Н., Снит П. и др. Определитель бактерий Берджи: в 2 т. / под ред. Г. А. Заварзина. М.: Мир, 1997.</mixed-citation><mixed-citation xml:lang="en">Bergey R., Holt J., Krieg N., Sneath P. et al. Bergey's Manual of Determinative Bacteriology: in 2 volumes, edited by G. A. Zavarzin. M.: Mir, 1997. 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