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This study reports the first coinfection by\n                    <jats:italic>D. renale<\/jats:italic>\n                    and\n                    <jats:italic>Pearsonema<\/jats:italic>\n                    sp. in the urine of a free-ranging maned wolf as well as associated laboratory findings. A male adult maned wolf, injured in a train accident in an urban area, was referred to the Centro de Triagem de Animais Silvestres (CETAS) \u2013 Rio de Janeiro, Brazil, where hemogram, biochemistry, ultrasonography, and urinalysis were performed. Ultrasonography examination revealed findings consistent with parasitism by\n                    <jats:italic>D. renale<\/jats:italic>\n                    in the right kidney and right perirenal region. Urinary sediment examination showed\n                    <jats:italic>D. renale<\/jats:italic>\n                    (5\/field) and\n                    <jats:italic>Pearsonema<\/jats:italic>\n                    sp. eggs (1\/field). Egg morphometry was performed, yielding mean length and width values of 62.2\u00a0\u03bcm and 41.2\u00a0\u03bcm for\n                    <jats:italic>D. renale<\/jats:italic>\n                    and 58.0\u00a0\u03bcm and 26.1\u00a0\u03bcm for\n                    <jats:italic>Pearsonema<\/jats:italic>\n                    sp., respectively. Through sediment examination and morphometry, it was possible to confirm\n                    <jats:italic>Pearsonema<\/jats:italic>\n                    sp. and\n                    <jats:italic>D. renale<\/jats:italic>\n                    infection, the latter also confirmed by ultrasonography, highlighting the importance of urinalysis in wild animals and demonstrating the need for continuous investigation into\n                    <jats:italic>Pearsonema<\/jats:italic>\n                    spp. which are poorly studied in wild canids.\n                  <\/jats:p>","DOI":"10.1007\/s11259-026-11357-3","type":"journal-article","created":{"date-parts":[[2026,6,19]],"date-time":"2026-06-19T06:54:59Z","timestamp":1781852099000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["First report of free-ranging maned wolf (Chrysocyon brachyurus) coinfected with Dioctophyma renale and Pearsonema sp. in Brazil"],"prefix":"10.1007","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2470-0565","authenticated-orcid":false,"given":"Alexandre Carvalho","family":"Costa","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8969-0551","authenticated-orcid":false,"given":"Elisabeth Neves","family":"Mureb","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3197-2908","authenticated-orcid":false,"given":"Naiara Vidal","family":"Stocco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0239-5395","authenticated-orcid":false,"given":"\u00c1gatha Ferreira Xavier","family":"de Oliveira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3581-9369","authenticated-orcid":false,"given":"Bruna Emely Pereira","family":"Barbosa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2948-2651","authenticated-orcid":false,"given":"Cristiano Chaves Pessoa","family":"da Veiga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4064-0710","authenticated-orcid":false,"given":"Andresa","family":"Guimar\u00e3es","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7960-7475","authenticated-orcid":false,"given":"Juliana Macedo","family":"Raimundo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8218-3626","authenticated-orcid":false,"given":"Huarrisson Azevedo","family":"Santos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9641-0674","authenticated-orcid":false,"given":"Daniel","family":"de Almeida Balthazar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4627-1362","authenticated-orcid":false,"given":"Cristiane Divan","family":"Baldani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,6,19]]},"reference":[{"key":"11357_CR1","doi-asserted-by":"publisher","first-page":"509","DOI":"10.1590\/S0074-02762002000400010","volume":"97","author":"PM Beldomenico","year":"2002","unstructured":"Beldomenico PM, Hunzicker D, Taverna JL, Rejf PK (2002) Capillariidae eggs found in the urine of a free ranging maned wolf from Argentina. 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However, no approval was required to achieve the objectives of this study because the work was carried out as part of necessary clinical treatments for the animal.","order":1,"name":"Ethics","label":"Ethics approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":2,"name":"Ethics","label":"Consent to participate","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":3,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"405"}}