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In this study, we provided supplementary morphological and molecular data on these three\n Myxobolus<\/jats:italic>\n species and histopathological analyses of the tissues infected by\n M. umidus<\/jats:italic>\n and\n M. pantanalis<\/jats:italic>\n in bryconid fishes caught from the Brazilian Pantanal wetland. A total of four\n \n B. hilarii<\/jats:italic>\n <\/jats:styled-content>\n and eleven\n \n S. brasiliensis<\/jats:italic>\n <\/jats:styled-content>\n specimens were examined. Among the four\n \n B. hilarii<\/jats:italic>\n <\/jats:styled-content>\n , one specimen exhibited several\n M. umidus<\/jats:italic>\n plasmodia surrounded by a thin capsule of connective tissue in the spleen, but no inflammatory process was noted. Whereas two of the eleven\n \n S. brasiliensis<\/jats:italic>\n <\/jats:styled-content>\n individuals presented plasmodia of\n M. pantanalis<\/jats:italic>\n . Fish infected with\n M. pantanalis<\/jats:italic>\n were characterized by pronounced inflammatory reaction, blood congestion, hyperplasia of lamellar epithelium, lamellar fusion, and focal necrosis of chondrocytes in the gill filaments.\n Myxobolus<\/jats:italic>\n species confirmation was achieved through morphological assessment and small subunit ribosomal DNA (SSU rDNA) sequencing performed on myxospores isolated from a single plasmodium of each species (\n M. umidus, M. pantanalis,<\/jats:italic>\n and\n M. salminus<\/jats:italic>\n ). Phylogenetic analysis based on the newly generated SSU rDNA sequence of\n M. salminus<\/jats:italic>\n , placed this species as sister to\n Henneguya rotunda<\/jats:italic>\n , reinforcing the strong tendency for\n Myxobolus<\/jats:italic>\n and\n Henneguya<\/jats:italic>\n species to cluster according to the phylogenetic relationships of their fish hosts.\n <\/jats:p>","DOI":"10.1111\/jfd.70237","type":"journal-article","created":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T01:18:16Z","timestamp":1783646296000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Histopathological and Molecular Data on\n Myxobolus<\/i>\n spp. Infecting Bryconid Fish From the Brazilian Pantanal Wetland"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6976-3194","authenticated-orcid":false,"given":"Caroline Munhoz","family":"Meira","sequence":"first","affiliation":[{"name":"Departamento de Medicina Veterin\u00e1ria, Faculdade de Zootecnia e Engenharia de Alimentos Universidade de S\u00e3o Paulo (USP) Pirassununga Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Milena Lucia","family":"Cornejo","sequence":"additional","affiliation":[{"name":"Departamento de Medicina Veterin\u00e1ria, Faculdade de Zootecnia e Engenharia de Alimentos Universidade de S\u00e3o Paulo (USP) Pirassununga Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Arana","sequence":"additional","affiliation":[{"name":"Instituto de Biologia Universidade Estadual de Campinas \u2013 UNICAMP Campinas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edson Aparecido","family":"Adriano","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancias Ambientais, Qu\u00edmicas e Farmac\u00eauticas Universidade Federal de S\u00e3o Paulo Diadema Brazil"},{"name":"Departamento de Biologia Animal, Programa de P\u00f3s\u2010Gradua\u00e7\u00e3o Em Biologia Animal, Instituto de Biologia Universidade Estadual de Campinas \u2013 UNICAMP Campinas Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonio Augusto Mendes","family":"Maia","sequence":"additional","affiliation":[{"name":"Departamento de Medicina Veterin\u00e1ria, Faculdade de Zootecnia e Engenharia de Alimentos Universidade de S\u00e3o Paulo (USP) Pirassununga Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,9]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetpar.2009.07.001"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1046\/J.1365\u20102761.2003.00485.X"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1093\/nar\/25.17.3389"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/978\u20103\u2010319\u201014753\u20106_6"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1550\u20107408.2010.00525.x"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.2307\/3284453"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1371\/JOURNAL.PONE.0073713"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1645\/GE\u2010336R"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11230\u2010005\u20103135\u20109"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.14411\/FP.2021.012"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.3354\/DAO058035"},{"key":"e_1_2_10_13_1","first-page":"230","volume-title":"Fish Diseases and Disorders","author":"Feist S. 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