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In Brazil, the parasite has been reported mainly in domestic dogs and some wild canids, and its occurrence in mustelids has been documented only once previously. This study reports the first occurrence of\n                    <jats:italic>A. vasorum<\/jats:italic>\n                    infecting a lesser grison (\n                    <jats:italic>Galictis cuja<\/jats:italic>\n                    ) in Brazil. The mustelid was found after being accidentally run over by a vehicle on a highway in the south of the country. Clinical, physical, and complementary examinations were performed for clinical screening. In the parasitological examination of feces, nematode larvae were recovered and identified morphometrically and molecularly through conventional PCR targeting to the\n                    <jats:italic>COX1<\/jats:italic>\n                    gene, followed by sequencing and phylogenetic analysis. The results confirmed the presence of\n                    <jats:italic>A. vasorum<\/jats:italic>\n                    , showing 99\u2013100% identity with sequences of the same species deposited in GenBank. Therefore, we document here the first report of\n                    <jats:italic>A. vasorum<\/jats:italic>\n                    parasitizing\n                    <jats:italic>G. cuja<\/jats:italic>\n                    . Thus, the number of known host species parasitized by this helminth is expanded. Furthermore, we provide a new molecular sequence, contributing to the knowledge of this nematode in South America.\n                  <\/jats:p>","DOI":"10.1007\/s11259-026-11418-7","type":"journal-article","created":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T03:35:25Z","timestamp":1784864125000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["First report of Angiostrongylus vasorum parasitizing lesser grison (Galictis cuja) (Mustelidae) in Brazil"],"prefix":"10.1007","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1207-8190","authenticated-orcid":false,"given":"Julia Somavilla","family":"Lignon","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maiza Paix\u00e3o","family":"Souza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nat\u00e1lia","family":"B\u00fcttenbender","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro Almeida","family":"Rezende","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raqueli Teresinha","family":"Fran\u00e7a","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kau\u00ea Rodriguez","family":"Martins","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rodrigo Casquero","family":"Cunha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felipe Geraldo","family":"Pappen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diego Moscarelli","family":"Pinto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,24]]},"reference":[{"issue":"1","key":"11418_CR1","doi-asserted-by":"publisher","first-page":"e018119","DOI":"10.1590\/S1984-29612019103","volume":"29","author":"LR Almeida","year":"2020","unstructured":"Almeida LR, Souza JGR, Santos HA et al (2020) Angiostrongylus minasensis n. sp.: new species found parasitizing coatis (Nasua nasua) in an urban protected area in Brazil. 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