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<article article-type="research-article" dtd-version="1.2" xml:lang="ru" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><front><journal-meta><journal-id journal-id-type="issn">2687-0940</journal-id><journal-title-group><journal-title>Challenges in modern medicine</journal-title></journal-title-group><issn pub-type="epub">2687-0940</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.52575/2687-0940-2026-49-1-26-38</article-id><article-id pub-id-type="publisher-id">275</article-id><article-categories><subj-group subj-group-type="heading"><subject>INTERNAL DISEASES</subject></subj-group></article-categories><title-group><article-title>&lt;strong&gt;The State of Microbiocenosis of the Large Intestine in Children against the Background of Systemic Therapy with an Antimycotic&lt;/strong&gt;</article-title><trans-title-group xml:lang="en"><trans-title>&lt;strong&gt;The State of Microbiocenosis of the Large Intestine in Children against the Background of Systemic Therapy with an Antimycotic&lt;/strong&gt;</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Khmelnitsky</surname><given-names>Roman А.</given-names></name><name xml:lang="en"><surname>Khmelnitsky</surname><given-names>Roman А.</given-names></name></name-alternatives></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Khmelnitskaya</surname><given-names>Yulia I.</given-names></name><name xml:lang="en"><surname>Khmelnitskaya</surname><given-names>Yulia I.</given-names></name></name-alternatives></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Vislobokov</surname><given-names>Аndrej V.</given-names></name><name xml:lang="en"><surname>Vislobokov</surname><given-names>Аndrej V.</given-names></name></name-alternatives><email>visl57@yandex.ru</email></contrib></contrib-group><pub-date pub-type="epub"><year>2026</year></pub-date><volume>49</volume><issue>1</issue><fpage>0</fpage><lpage>0</lpage><self-uri content-type="pdf" xlink:href="/media/journal-medicine/2026/1/АПМ_2026_Том_49__1_26-38.pdf" /><abstract xml:lang="ru"><p>The study was aimed at evaluating the effect of a tablet antimycotic on the normal flora of the large intestine in the treatment of scalp microsporium in children. Materials and methods. The microbiota of the large intestine was studied using bacteriological analysis in 48 patients from rural areas, aged 3 three to 12&amp;nbsp;years, with microsporium of the scalp. The studies were conducted before the use of griseofulvin at a dose of 21&amp;ndash;22 mg/kg per day for six weeks, on the tenth and twentieth days of therapy. It was found that by the 31.01&amp;nbsp;&amp;plusmn;&amp;nbsp;2.85 day of treatment, a full clinical effect was observed, including the absence of fluorescence in the UFL and the eradication of the pathogen in the foci. Before treatment, the normal flora of the large intestine of rural children was dominated by a bifidus-dominant composition. By the twentieth day of treatment, the average concentrations of bifidobacteria had decreased to 106 CFU/g (a decrease of 40.0 %) (p ⩽ 0.05) and lactobacilli had decreased to 105 CFU/g (a decrease of 28.6 %) (p&amp;nbsp;⩽&amp;nbsp;0.05), compared to the initial level. Conclusion. The study revealed a side effect of griseofulvin during long-term oral administration, which is expressed in a decrease in the concentration of the main families of normal flora in the microbial landscape of the large intestine of children without combining it with drugs that normalize the species composition of the intestinal microflora.</p></abstract><trans-abstract xml:lang="en"><p>The study was aimed at evaluating the effect of a tablet antimycotic on the normal flora of the large intestine in the treatment of scalp microsporium in children. Materials and methods. The microbiota of the large intestine was studied using bacteriological analysis in 48 patients from rural areas, aged 3 three to 12&amp;nbsp;years, with microsporium of the scalp. The studies were conducted before the use of griseofulvin at a dose of 21&amp;ndash;22 mg/kg per day for six weeks, on the tenth and twentieth days of therapy. It was found that by the 31.01&amp;nbsp;&amp;plusmn;&amp;nbsp;2.85 day of treatment, a full clinical effect was observed, including the absence of fluorescence in the UFL and the eradication of the pathogen in the foci. Before treatment, the normal flora of the large intestine of rural children was dominated by a bifidus-dominant composition. By the twentieth day of treatment, the average concentrations of bifidobacteria had decreased to 106 CFU/g (a decrease of 40.0 %) (p ⩽ 0.05) and lactobacilli had decreased to 105 CFU/g (a decrease of 28.6 %) (p&amp;nbsp;⩽&amp;nbsp;0.05), compared to the initial level. Conclusion. The study revealed a side effect of griseofulvin during long-term oral administration, which is expressed in a decrease in the concentration of the main families of normal flora in the microbial landscape of the large intestine of children without combining it with drugs that normalize the species composition of the intestinal microflora.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>children</kwd><kwd>microbiota</kwd><kwd>treatment</kwd><kwd>griseofulvin</kwd><kwd>microsporia</kwd></kwd-group><kwd-group xml:lang="en"><kwd>children</kwd><kwd>microbiota</kwd><kwd>treatment</kwd><kwd>griseofulvin</kwd><kwd>microsporia</kwd></kwd-group></article-meta></front><back><ref-list><title>Список литературы</title><ref id="B1"><mixed-citation>Andreev V.A., Stetsyuk O.U., Andreeva I.V. 2022. Probiotics: An Unresolved Problem. 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