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Crassicaudiasis in three geographically and chronologically distant Cuvier's beaked whales (Ziphius cavirostris) stranded off Brazil

Crassicaudiasis in three geographically and chronologically distant Cuvier's beaked whales (Ziphius cavirostris) stranded off Brazil

Authors :
Luciana Sonne
Letícia Koproski
Karina R. Groch
Sandra Márcia Tietz Marques
Renata L.G. Batista
Derek Blaese de Amorim
Cristiane K. M. Kolesnikovas
Max Rondon Werneck
Juliana Plácido Guimarães
Gisele Silva Boos
David Driemeier
Andrei Manoel Brum Febrônio
Kátia R. Groch
Daniela B. Mariani
Caroline Sobotyk
Guilherme G. Verocai
Josué Díaz-Delgado
Matheus Viezzer Bianchi
Cristine Mari
Jociery Einhardt Vergara Parente
Source :
Repositório Institucional da UFRGS, Universidade Federal do Rio Grande do Sul (UFRGS), instacron:UFRGS, International Journal for Parasitology: Parasites and Wildlife, International Journal for Parasitology: Parasites and Wildlife, Vol 16, Iss, Pp 262-269 (2021)
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

The Cuvier's beaked whale (CBW; Ziphius cavirostris) is a cosmopolitan marine mammal found in deep tropical and temperate waters of all oceans. CBW strandings have been recorded sporadically in Brazil; however, there is lack of information available regarding their causes of stranding and/or death. Herein, we report the epidemiologic, pathologic, morphologic parasitologic features and molecular identification of arterial and renal crassicaudiasis by Crassicauda sp. in three geographically and chronologically distant CBW stranded off Brazil. CBW-1 was an adult male stranded dead in Rio Grande do Sul State. CBW-2 was an adult female that stranded alive in Sergipe State and died shortly after. CBW-3 was and adult male that stranded dead in Santa Catarina State. The most relevant pathologic findings in these three CBW were severe, chronic proliferative mesenteric and caudal aortic endarteritis and chronic granulomatous and fibrosing interstitial nephritis with renicular atrophy and loss, and numerous intralesional Crassicauda sp. nematodes. Furthermore, CBW-1 had concomitant gram-negative bacterial pneumonia and pulmonary and hepatic thromboembolism. Morphologic analysis of renal adult nematodes identified Crassicauda sp. in the three CBW. Molecular analyses targeting the 18S and ITS-2 ribosomal loci of renal nematodes in CBW-2 and CBW-3 identified C. anthonyi. It is believed that severe arterial and renal crassicaudiasis likely resulted or contributed significantly to morbidity and death of these animals. These results expand the known geographical range of occurrence of crassicaudiasis in CBW. Specifically, the present study provides the first accounts of arterial and renal crassicaudiasis in CBW off the southern hemisphere, specifically in CBW off Brazil, and to the authors' knowledge, it is the first record of C. anthonyi in the southern Atlantic Ocean.<br />Graphical abstract Image 1<br />Highlights • First record of Crassicauda anthonyi in cetaceans off the southern Atlantic Ocean. • Arterial and renal crassicaudiasis may be fatal in Ziphius cavirostris. • ITS-2 gene sequence analysis enables Crassicauda species identification.

Details

ISSN :
22132244
Volume :
16
Database :
OpenAIRE
Journal :
International Journal for Parasitology: Parasites and Wildlife
Accession number :
edsair.doi.dedup.....dd17cb8a435c4af6e3927705525ef7e6
Full Text :
https://doi.org/10.1016/j.ijppaw.2021.10.010