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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Biology Bulletin</journal-id><journal-title-group><journal-title xml:lang="en">Biology Bulletin</journal-title><trans-title-group xml:lang="ru"><trans-title>Известия Российской академии наук. Серия биологическая</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1026-3470</issn><issn publication-format="electronic">3034-5367</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">682112</article-id><article-id pub-id-type="doi">10.31857/S1026347025020055</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ZOOLOGY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЗООЛОГИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Biological diversity of causative agents of rabbits’ eimeriosis in foothills of Armenia</article-title><trans-title-group xml:lang="ru"><trans-title>Биологическое разнообразие возбудителей эймериозов кроликов в предгорной зоне Армении</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Barseghyan</surname><given-names>R. Е.</given-names></name><name xml:lang="ru"><surname>Барсегян</surname><given-names>Р. Э.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Movsesyan</surname><given-names>S. O.</given-names></name><name xml:lang="ru"><surname>Мовсесян</surname><given-names>С. О.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Akopyan</surname><given-names>K. V.</given-names></name><name xml:lang="ru"><surname>Акопян</surname><given-names>К. В.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Petrosyan</surname><given-names>R. А.</given-names></name><name xml:lang="ru"><surname>Петросян</surname><given-names>Р. А.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nikogosyan</surname><given-names>М. A.</given-names></name><name xml:lang="ru"><surname>Никогосян</surname><given-names>М. А.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Arutyunova</surname><given-names>L. D.</given-names></name><name xml:lang="ru"><surname>Aрутюнова</surname><given-names>Л. Д.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Terenina</surname><given-names>N. B.</given-names></name><name xml:lang="ru"><surname>Теренина</surname><given-names>Н. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kreshchenko</surname><given-names>N. D.</given-names></name><name xml:lang="ru"><surname>Крещенко</surname><given-names>Н. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio><p>Институт биофизики клетки Российской академии наук</p></bio><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Voronin</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Воронин</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>voronin@sev-in.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Barseghyan</surname><given-names>N. E.</given-names></name><name xml:lang="ru"><surname>Барсегян</surname><given-names>Н. Э.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dudukchyan</surname><given-names>Z. M.</given-names></name><name xml:lang="ru"><surname>Дудукчян</surname><given-names>З. М.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhamahyan</surname><given-names>R. R. A.</given-names></name><name xml:lang="ru"><surname>Жакмакян</surname><given-names>Р. Р. А.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tadevosyan</surname><given-names>N. N.</given-names></name><name xml:lang="ru"><surname>Тадевосян</surname><given-names>Н. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vardanyan</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Варданян</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="AM">Armenia</country></address><bio xml:lang="en"><p>Department of Biological Science and Chemistry</p></bio><bio xml:lang="ru"><p>кафедра биологических наук и общей химии</p></bio><email>movesesyan@list.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Scientific Center of Zoology and Hydroecology NAS RA</institution></aff><aff><institution xml:lang="ru">Научный центр зоологи и гидроэкологии НАН РА</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">A.N. Severtsov’s Institute of Ecology and Evolution RAS</institution></aff><aff><institution xml:lang="ru">Институт проблем экологии и эволюции им. А.Н. Северцова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Institute of Cell Biophysics of Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Федеральный исследовательский центр «Пущинский научный центр биологических исследований Российской академии наук»</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">National Agricultural University of Armenia</institution></aff><aff><institution xml:lang="ru">Национальный аграрный университет Армении</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2025</year></pub-date><issue>2</issue><fpage>175</fpage><lpage>181</lpage><history><date date-type="received" iso-8601-date="2025-06-03"><day>03</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://medjrf.com/1026-3470/article/view/682112">https://medjrf.com/1026-3470/article/view/682112</self-uri><abstract xml:lang="en"><p>Studies on distribution of rabbits’ <italic>Eimeria</italic> were performed during 2020–2021 in foothills of Armenia based on the station of Russian-Armenian Center of Zoology and Parasitology of A.N. Severtsov’s Institute of Ecology and Evolution RAS and a Scientific Center of Zoology and Hydroecology of National Academy of Science of Armenia. In the farms studied there were found 7 species of eimerioses’ (g.<italic> Eimeria</italic> Schneider, 1875)<italic> </italic>causative agents: <italic>E. coecicola</italic> Cheissin 1947<italic>, E. exigua</italic> Yakimoff, 1934<italic>, E. irresidua</italic> Kessel &amp; Jankiewicz, 1931<italic>, E. magna</italic> Pérard, 1925,<italic> E. media</italic> Kessel, 1929<italic>, E. perforans</italic> (Leuckart, 1879) Sluiter et Swellengrebel, 1912<italic>, E. stiedae </italic>(Lindemann, 1865) Kisskalt et Hartmann, 1907<italic> </italic>and a giant form we have also detected before which we denotate as <italic>E. sp. </italic>The work describes the frequencies of appearance of the <italic>Eimeria</italic> species detected dependent on season. Life cycles have been studied and roles various species play as causative agents are established.</p></abstract><trans-abstract xml:lang="ru"><p>В предгорной зоне Армении (Котайкский регион) на базе Совместного Российско-Армянского научно-экспериментального центра зоологии и паразитологии Института проблем экологии и эволюции им. А.Н. Северцова РАН и Научного центра зоологии и гидроэкологии Национальной академии наук Армении (РАСНЭЦ) в период 2020–2021 г. проведены исследования по изучению распространенности возбудителей эймериоза среди кроликов. В обследованных хозяйствах были выявлены 7 видов возбудителей из рода <italic>Eimeria</italic> Schneider, 1875:<italic> E. coecicola</italic> Cheissin 1947<italic>, E. exigua</italic> Yakimoff, 1934<italic>, E. irresidua</italic> Kessel &amp; Jankiewicz, 1931<italic>, E. magna</italic> Pérard, 1925,<italic> E. media</italic> Kessel, 1929<italic>, E. perforans</italic> (Leuckart, 1879) Sluiter et Swellengrebel, 1912<italic>, E. stiedae </italic>(Lindemann, 1865) Kisskalt et Hartmann, 1907 и ранее обнаруженная нами гигантская форма, обозначенная <italic>E. </italic>sp<italic>. </italic>Установлены частоты встречаемости обнаруженных видов эймерий в зависимости от сезона. Исследованы жизненные циклы и установлена роль различных видов эймерий в качестве возбудителей болезней кроликов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Eimeria</kwd><kwd>faunistics</kwd><kwd>infection of domestic rabbits</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Eimeria</kwd><kwd>видовой состав</kwd><kwd>зараженность домашних кроликов</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Аниканова В.С. Некоторые аспекты диагностики и профилактики кокцидиозов кроликов Карелии // Экология паразитических организмов. Петрозаводск, 1985. С. 65–71.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Барсегян Р.Э., Петросян Р.А., Никогосян М.А. Сравнительный анализ распространенности кокцидиоза кроликов в горной, предгорной и равнинной зонах Армении // Биол. журн. Армении 2018. № 3 (70). 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