{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T23:51:50Z","timestamp":1791244310697,"version":"4.1.0"},"reference-count":25,"publisher":"Wildlife Disease Association","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Wildlife Diseases"],"published-print":{"date-parts":[[2025,7,11]]},"abstract":"<jats:p>Periods of drought have been observed in the Brazilian Pantanal for several decades, typically occurring from May to November. These droughts impact the conservation of thousands of species, including the yacare caiman (Caiman yacare). This study aimed to describe the pathologic and parasitologic findings from postmortem examinations of free-ranging yacare caimans to provide insights regarding the influence of extreme drought on the health of this species. In total, 13 caimans were necropsied, representing deaths during a period of extreme drought (October 2021, 12 individuals) and a period of typical rainfall (October 2022, 1 individual). The main lesions identified in the respiratory tract included pulmonary granulomas (10\/13, 77%), tracheal granulomas (8\/13, 61.6%), tracheal pentastomids (5\/13, 38.5%), and pulmonary pentastomids (3\/13, 23.1%). The main lesions identified in the gastrointestinal tract included lesions caused by helminthiasis (Nematoda and Acanthocephala: 10\/13, 77%), granulomas (5\/13, 38.5%,), and intestinal hemorrhage (2\/13, 15.4%). Other findings included myocardial granulomas, bacterial endocarditis, and unidentified helminths within renal tubules. Five helminth species were morphologically identified: the intestinal acanthocephalan Polyacanthorhynchus rhopalorhynchus, the respiratory pentastomids Alofia platycephala and Leiperia gracilis, the gastric nematode Ortleppascaris alata, and the intestinal nematode Micropleura vazi. The increased number of reported deaths and the consistent identification of parasite-associated lesions in the necropsied caimans from 2021 suggests an association between extreme drought, parasite infections, and the health status of yacare caiman.<\/jats:p>","DOI":"10.7589\/jwd-d-24-00102","type":"journal-article","created":{"date-parts":[[2025,7,17]],"date-time":"2025-07-17T08:51:42Z","timestamp":1752742302000},"page":"685-693","source":"Crossref","is-referenced-by-count":1,"title":["Pathologic and Parasitologic Findings of Free-Ranging Yacare Caiman (Caiman yacare) in the Brazilian Pantanal"],"prefix":"10.7589","volume":"61","author":[{"given":"Leonardo L.","family":"Gorza","sequence":"first","affiliation":[{"name":"Department of Veterinary Clinics and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais, 6627 Avenida Presidente Ant\u00f4nio Carlos, Belo Horizonte, Minas Gerais, 31270-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ellen C.","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinics and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais, 6627 Avenida Presidente Ant\u00f4nio Carlos, Belo Horizonte, Minas Gerais, 31270-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S\u00f3stenes A. C.","family":"Marcelino","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinics and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais, 6627 Avenida Presidente Ant\u00f4nio Carlos, Belo Horizonte, Minas Gerais, 31270-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yhuri C.","family":"N\u00f3brega","sequence":"additional","affiliation":[{"name":"Caiman Project, Marcos Daniel Institute, 190 Rua Jos\u00e9 Alexandre Buaiz, Vit\u00f3ria, Esp\u00edrito Santo, 29092-170, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hudson A.","family":"Pinto","sequence":"additional","affiliation":[{"name":"Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, 6627 Avenida Presidente Ant\u00f4nio Carlos, Belo Horizonte, Minas Gerais, 31270-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guilherme C.","family":"Tavares","sequence":"additional","affiliation":[{"name":"Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, 6627 Avenida Presidente Ant\u00f4nio Carlos, Belo Horizonte, Minas Gerais, 31270-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcelo P. N.","family":"Carvalho","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinics and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais, 6627 Avenida Presidente Ant\u00f4nio Carlos, Belo Horizonte, Minas Gerais, 31270-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcelo R. D.","family":"Santos","sequence":"additional","affiliation":[{"name":"Caiman Project, Marcos Daniel Institute, 190 Rua Jos\u00e9 Alexandre Buaiz, Vit\u00f3ria, Esp\u00edrito Santo, 29092-170, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcos E.","family":"Coutinho","sequence":"additional","affiliation":[{"name":"Brazilian Institute of the Environment and Renewable Natural Resources, Center for Conservation and Management of Reptiles and Amphibians, 8121 Avenida do Contorno, Belo Horizonte, Minas Gerais, 30110-051, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert J.","family":"Ossiboff","sequence":"additional","affiliation":[{"name":"Department of Comparative, Diagnostic, and Population Medicine, University of Florida College of Veterinary Medicine, 2015 SW 16th Ave., Gainesville, Florida 32608, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felipe","family":"Pierezan","sequence":"additional","affiliation":[{"name":"Department of Comparative, Diagnostic, and Population Medicine, University of Florida College of Veterinary Medicine, 2015 SW 16th Ave., Gainesville, Florida 32608, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"4415","reference":[{"key":"1","doi-asserted-by":"crossref","unstructured":"L Adams, R Isaza, E Greiner,  \"J Zoo Wildl Med.\"  32, \"Fatal pentastomiasis in captive African dwarf crocodile hatchlings (Osteolaemus tetraspis).\" 500 (2001)","DOI":"10.1638\/1042-7260(2001)032[0500:FPICAD]2.0.CO;2"},{"key":"2","doi-asserted-by":"crossref","unstructured":"CJR Alho  and JSV Silva  \"Animals.\"  2, \"Effects of severe floods and droughts on wildlife of the Pantanal wetland (Brazil)\u2014A review.\" 591 (2012)","DOI":"10.3390\/ani2040591"},{"key":"3","doi-asserted-by":"crossref","unstructured":"OM. Amin,  \"J Parasitol.\"  73, \"Key to the families and subfamilies of Acanthocephala, with the erection of a new class (Polyacanthocephala) and a new order (Polyacanthorhynchida).\" 1216 (1987)","DOI":"10.2307\/3282307"},{"key":"4","doi-asserted-by":"crossref","unstructured":"JW Brooks  and L Sutton  \"Veterinary forensic pathology.\"  1, \"Postmortem changes and estimating the postmortem interval.\" 43 (2018)","DOI":"10.1007\/978-3-319-67172-7_4"},{"key":"5","doi-asserted-by":"crossref","unstructured":"AMC Cardoso, AJS Souza, RC Menezes, et al.  \"Pesqui Vet Bras.\"  34, \"Les\u00f5es pulmonares associadas ao parasitismo por Sebekia oxycephala (Pentastomida) em jacar\u00e9s-a\u00e7u (Melanosuchus niger Spix, 1825) oriundos de vida livre na Amaz\u00f4nia brasileira.\" 1002 (2014)","DOI":"10.1590\/S0100-736X2014001000013"},{"key":"6","unstructured":"JB Catto  and JFR Amato  \"Rev Bras Parasitol Vet.\"  3, \"Helminth community structure of the caiman, Caiman crocodilus yacare (Crocodylia, Alligatoridae) in the Brazilian \u201cPantanal.\" 109 (1994)"},{"key":"7","unstructured":"ME. Coutinho,  \"Population ecology and the conservation and management of Caiman yacare in the Pantanal, Brazil.\"  272 (2000)"},{"key":"8","doi-asserted-by":"crossref","unstructured":"K Junker, F Calitz, D Govender, et al.  \"Folia Parasitol.\"  63, \"Pentastome assemblages of the Nile crocodile, Crocodylus niloticus Laurenti (Reptilia: Crocodylidae), in the Kruger National Park, South Africa.\" 040 (2016)","DOI":"10.14411\/fp.2016.040"},{"key":"9","unstructured":"CL Mazzinghy, KDS Almeida, FL Alves,  \"Rev Cient Electron Med Vet.\"  32, \"Fauna helmintol\u00f3gica de jacar\u00e9s no Brasil \u2013 Revis\u00e3o de literatura.\" (2019)"},{"key":"10","unstructured":"LG. Luna,  \"Manual of histologic staining methods of the Armed Forces Institute of Pathology.\"  258 (1968)"},{"key":"11","unstructured":"DA. Machado Filho,  \"R Bras Biol.\"  7, \"Revis\u00e3o do g\u00eanero \u201cPolyacanthorhynchus\u201d Travassos, 1920 (Acanthocephala, Rhadinorhynchidae).\" 195 (1947)"},{"key":"12","doi-asserted-by":"crossref","unstructured":"JA Marengo, AP Cunha, LA Cuartas, et al.  \"Front Water.\"  3, \"Extreme drought in the Brazilian Pantanal in 2019\u20132020: Characterization, causes, and impacts.\" 639204 (2021)","DOI":"10.3389\/frwa.2021.639204"},{"key":"13","unstructured":"JL Mollericona, G \u00c1lvarez, V Ramos, et al.  \"Neotrop Hydrobiol Aquat Conserv.\"  2, \"Parasites of Caiman yacare Daudin, 1802 (Crocodylia: Alligatoridae) in the Tacana Indigenous Territory (Beni River basin), Bolivia.\" 38 (2021)"},{"key":"14","doi-asserted-by":"crossref","unstructured":"RA Ojeda-Adame, H Hern\u00e1ndez-Hurtado, MM Ram\u00edrez-Martinez, et al.  \"S Am J Herpetol.\"  16, \"A body condition score for crocodilians.\" 10 (2020)","DOI":"10.2994\/SAJH-D-18-00074.1"},{"key":"15","unstructured":"V N\u00fa\u00f1ez  and FB Drago  \"Macropar\u00e1sitos: Diversidad y biologia.\"  \"Phylum Acanthocephala.\" 112 (2017)"},{"key":"16","unstructured":"AA Rego, G Shaeffer, C Strussman,  \"Cienc Cult.\"  39, \"Leiperia gracile (Diesing, 1835) pentastomid parasite from trachea of South American alligator, Caiman crocodilus. Taxonomy and pathogenic action.\" 864 (1987)"},{"key":"17","doi-asserted-by":"crossref","unstructured":"J Riley  and FW Huchzermeyer  \"Syst Parasitol.\"  34, \"A reassessment of the pentastomid genus Leiperia Sambon, 1922, with a description of a new species from both the Indopacific crocodile Crocodylus porosus and Johnston's crocodile C. johnsoni in Australia.\" 53 (1996)","DOI":"10.1007\/BF01531211"},{"key":"18","unstructured":"SA Santos, MS Nogueira, MS Pinheiro, et al.  \"Herpetol J.\"  6, \"Diets of Caiman crocodilus yacare from different habitats in the Brazilian Pantanal.\" 111 (1996)"},{"key":"19","doi-asserted-by":"crossref","unstructured":"JT Self  and AA Rego  \"Syst Parasitol.\"  7, \"Reassessments and revisions of certain genera and species of the family Sebekidae (Pentastomida) including description of Sebekia microhamus n. sp.\" 33 (1985)","DOI":"10.1007\/BF00010159"},{"key":"20","doi-asserted-by":"crossref","unstructured":"JFA. Sprent,  \"J Helminthol.\"  52, \"Ascaridoid nematodes of amphibians and reptiles: Gedoelstascaris n.g. and Ortleppascaris n.g.\" 261 (1978)","DOI":"10.1017\/S0022149X00005460"},{"key":"21","doi-asserted-by":"crossref","unstructured":"L. Travassos,  \"Mem Inst Oswaldo Cruz.\"  27, \"Sobre os filarideos dos crocodillos sul-americanos.\" 159 (1933)","DOI":"10.1590\/S0074-02761933000200007"},{"key":"22","doi-asserted-by":"crossref","unstructured":"LA Viana, F Paiva, ME Coutinho, et al.  \"J Parasitol.\"  96, \"Hepatozoon caimani (Apicomplexa: Hepatozoidae) in wild caiman, Caiman yacare, from the Pantanal region, Brazil.\" 83 (2010)","DOI":"10.1645\/GE-2150.1"},{"key":"23","doi-asserted-by":"crossref","unstructured":"JJ Vicente, HO Rodrigues, DC Gomes, et al.  \"Rev Bras Zool.\"  10, \"Nemat\u00f3ides do Brasil. Parte III: Nemat\u00f3ides de r\u00e9pteis.\" 19 (1993)","DOI":"10.1590\/S0101-81751993000100003"},{"key":"24","unstructured":"MR Werneck  and HJ Leandro  \"Tratado de crocodilianos do Brasil.\"  \"Endoparasitas em crocodilianos Brasileiros.\" 350 (2021)"},{"key":"25","doi-asserted-by":"crossref","unstructured":"ET Woodyard, WA Baumgartner, TG Rosser, et al.  \"J Parasitol.\"  105, \"Morphological, molecular, and histopathological data for Sebekia mississippiensis Overstreet, Self, and Vliet, 1985 (Pentastomida: Sebekidae) in the American alligator, Alligator mississippiensis Daudin, and the spotted gar, Lepisosteus oculatus Winchell.\" 283 (2019)","DOI":"10.1645\/18-122"}],"container-title":["Journal of Wildlife Diseases"],"original-title":[],"deposited":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T22:59:22Z","timestamp":1791241162000},"score":1,"resource":{"primary":{"URL":"https:\/\/bioone.org\/journals\/journal-of-wildlife-diseases\/volume-61\/issue-3\/JWD-D-24-00102\/Pathologic-and-Parasitologic-Findings-of-Free-Ranging-Yacare-Caiman-Caiman\/10.7589\/JWD-D-24-00102.full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,7,11]]},"references-count":25,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2025,7,1]]}},"URL":"https:\/\/doi.org\/10.7589\/jwd-d-24-00102","relation":{},"ISSN":["0090-3558","1943-3700"],"issn-type":[{"value":"0090-3558","type":"print"},{"value":"1943-3700","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,7,11]]}}}