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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">Russian Journal of Allergy</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Allergy</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский Аллергологический Журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1810-8830</issn><issn publication-format="electronic">2686-682X</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">17087</article-id><article-id pub-id-type="doi">10.36691/RJA17087</article-id><article-id pub-id-type="edn">KOHBUQ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</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">Clinical case of clavulanate allergy in a patient with suppurative hidradenitis</article-title><trans-title-group xml:lang="ru"><trans-title>Клинический случай аллергии на клавуланат у пациентки с суппуративным гидраденитом</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-4837-6624</contrib-id><contrib-id contrib-id-type="spin">8290-3584</contrib-id><name-alternatives><name xml:lang="en"><surname>Nekrasova</surname><given-names>Tatiana V.</given-names></name><name xml:lang="ru"><surname>Некрасова</surname><given-names>Татьяна Вадимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>loriley@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1606-205X</contrib-id><contrib-id contrib-id-type="spin">2063-7973</contrib-id><name-alternatives><name xml:lang="en"><surname>Latysheva</surname><given-names>Elena A.</given-names></name><name xml:lang="ru"><surname>Латышева</surname><given-names>Елена Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>ealat@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8491-195X</contrib-id><contrib-id contrib-id-type="spin">4684-3112</contrib-id><name-alternatives><name xml:lang="en"><surname>Myasnikova</surname><given-names>Tatiana N.</given-names></name><name xml:lang="ru"><surname>Мясникова</surname><given-names>Татьяна Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>t_miasnikova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Research Center — Institute of Immunology Federal Medical-Biological Agency</institution></aff><aff><institution xml:lang="ru">Государственный научный центр «Институт иммунологии»</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-02-09" publication-format="electronic"><day>09</day><month>02</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-04-06" publication-format="electronic"><day>06</day><month>04</month><year>2026</year></pub-date><volume>23</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>115</fpage><lpage>126</lpage><history><date date-type="received" iso-8601-date="2025-12-07"><day>07</day><month>12</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-02-03"><day>03</day><month>02</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2028-04-06"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://rusalljournal.ru/raj/about/submissions#copyrightNotice</ali:license_ref></license></permissions><self-uri xlink:href="https://rusalljournal.ru/raj/article/view/17087">https://rusalljournal.ru/raj/article/view/17087</self-uri><abstract xml:lang="en"><p>Beta-lactam antibiotics include several major groups of drugs that share structural similarities and mechanisms of action and often are first-line therapies for various bacterial infections.</p> <p>In clinical practice all groups of beta-lactam antibiotics are frequently excluded from treatment in case of adverse reactions associated with their use. However, allergic reactions typically develop via sensitization to specific antigenic determinants, rather than to the beta-lactam ring. Therefore, stepwise and thorough allergological evaluation is necessary to accurately define the spectrum of drug hypersensitivity.</p> <p>This article describes the structural characteristics of beta-lactam antibacterial agents and their cross-reactivity, along with key information on types of reactions associated with clavulanate. A clinical case of clavulanate allergy is presented.</p> <p>The diagnostic approach included a stepwise drug testing performed with ceftriaxone, cefixime, amoxicillin/clavulanate, ampicillin and amoxicillin. Immediate-type allergy to clavulanate was confirmed and no cross-reactivity to other beta-lactam antibiotics was discovered. According to personalized recommendations given to the patient, only beta-lactam antibiotics containing clavulanate were contraindicated, rather than the entire class of beta-lactams.</p></abstract><trans-abstract xml:lang="ru"><p>Бета-лактамные антибиотики включают несколько основных групп лекарственных препаратов, сходных по структуре и механизму действия, и зачастую являются препаратами первого выбора для лечения различных заболеваний бактериальной природы.</p> <p>При появлении нежелательных реакций, ассоциированных с приемом бета-лактамных антибиотиков, в клинической практике нередко полностью исключают из терапии все группы данных препаратов. Однако аллергическая реакция, как правило, обусловлена сенсибилизацией к определенным антигенным детерминантам, а не к бета-лактамному кольцу. Поэтому для уточнения спектра лекарственной гиперчувствительности необходима поэтапная и тщательная аллергологическая диагностика.</p> <p>В статье описаны структурные особенности антибактериальных препаратов группы бета-лактамов и их перекрестная реактивность, основные сведения о типах реакций, развивающихся при применении лекарственных препаратов, содержащих клавуланат. Представлено описание клинического случая аллергии на клавуланат.</p> <p>В процессе постановки диагноза проведено поэтапное тестирование с лекарственными препаратами: цефтриаксоном, цефиксимом, амоксициллином + клавуланатом, ампициллином, амоксициллином. По результатам тестирования подтверждены диагноз аллергии немедленного типа на клавуланат и отсутствие перекрестного реагирования на другие антибиотики ряда бета-лактамов. Согласно индивидуальным рекомендациям пациентке запрещено применение бета-лактамных антибиотиков, содержащих клавуланат, а не всех антибиотиков этой группы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>drug allergy</kwd><kwd>penicillin</kwd><kwd>clavulanate</kwd><kwd>drug provocation testing</kwd><kwd>clinical case</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лекарственная аллергия</kwd><kwd>пенициллин</kwd><kwd>клавуланат</kwd><kwd>провокационное тестирование</kwd><kwd>клинический случай</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Shah NS, Ridgway JP, Pettit N, et al. Documenting penicillin allergy: the impact of inconsistency. PLoS One. 2016;11(3):e0150514. doi: 10.1371/journal.pone.0150514</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Mak HWF, Yeung MHY, Wong JCY, et al. Differences in beta-lactam and penicillin allergy: beyond the West and focusing on Asia-Pacific. 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