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Pediatric MG and adult MG have many different characteristics, and current MG diagnostic methods for children are not quite fit. Previous studies indicate that alterations in the gut microbiota may be associated with adult MG. However, it has not been determined whether the gut microbiota are altered in pediatric MG patients.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>Our study recruited 53 pediatric MG patients and 46 age- and gender-matched healthy controls (HC). We sequenced the fecal samples of recruited individuals using whole-genome shotgun sequencing and analyzed the data with in-house bioinformatics pipeline.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>We built an MG disease classifier based on the abundance of five species, <jats:italic>Fusobacterium mortiferum<\/jats:italic>, <jats:italic>Prevotella stercorea<\/jats:italic>, <jats:italic>Prevotella copri<\/jats:italic>, <jats:italic>Megamonas funiformis<\/jats:italic>, and <jats:italic>Megamonas hypermegale<\/jats:italic>. The classifier obtained 94% area under the curve (AUC) in cross-validation and 84% AUC in the independent validation cohort. Gut microbiome analysis revealed the presence of human adenovirus F\/D in 10 MG patients. Significantly different pathways and gene families between MG patients and HC belonged to <jats:italic>P. copri, Clostridium bartlettii<\/jats:italic>, and <jats:italic>Bacteroides massiliensis<\/jats:italic>. Based on functional annotation, we found that the gut microbiome affects the production of short-chain fatty acids (SCFAs), and we confirmed the decrease in SCFA levels in pediatric MG patients via serum tests.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>The study indicated that altered fecal microbiota might play vital roles in pediatric MG\u2019s pathogenesis by reducing SCFAs. The microbial markers might serve as novel diagnostic methods for pediatric MG.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12916-021-02034-0","type":"journal-article","created":{"date-parts":[[2021,7,8]],"date-time":"2021-07-08T01:02:28Z","timestamp":1625706148000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Metagenome-wide association study of gut microbiome revealed potential microbial marker set for diagnosis of pediatric myasthenia gravis"],"prefix":"10.1186","volume":"19","author":[{"given":"Peng","family":"Liu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiqi","family":"Jiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shanshan","family":"Gu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yinping","family":"Xue","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongxia","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongzhao","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaxuan","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Congya","family":"Yan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pei","family":"Jia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoting","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9218-3219","authenticated-orcid":false,"given":"Guoyan","family":"Qi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,7,8]]},"reference":[{"issue":"1","key":"2034_CR1","doi-asserted-by":"publisher","first-page":"30","DOI":"10.1038\/s41572-019-0079-y","volume":"5","author":"NE Gilhus","year":"2019","unstructured":"Gilhus NE, Tzartos S, Evoli A, Palace J, Burns TM, Verschuuren JJGM. 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