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Angiostrongylosis in Cerdocyon thous (crab-eating fox) and Lycalopex gymnocercus (Pampas fox) in Southern Brazil

Published online by Cambridge University Press:  05 November 2018

Rafaela A. Caprioli Open the ORCID record for Rafaela A. Caprioli [Opens in a new window] ,
Caroline P. de Andrade ,
Fernando F. Argenta ,
Luiza P. Ehlers ,
João Fábio Soares ,
Saulo P. Pavarini ,
David Driemeier  and
Luciana Sonne
Rafaela A. Caprioli*
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
Caroline P. de Andrade
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
Fernando F. Argenta
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
Luiza P. Ehlers
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
João Fábio Soares
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
Saulo P. Pavarini
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
David Driemeier
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
Luciana Sonne
Affiliation:
Department of Clinical Veterinary Pathology, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, 42505, Porto Alegre, RS 91540-000, Brazil
*
Author for correspondence: Rafaela A. Caprioli, E-mail: rafa_caprioli@hotmail.com
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Abstract

The objective of this study was to identify species of Angiostrongylus spp. infecting wild carnivores in Southern Brazil, as well as to describe gross and histopathological findings associated with the infection. Necropsy was conducted in 16 wild carnivores parasitized by Angiostrongylus spp. Analysed lungs revealed multifocal dark-red areas of consolidation; in one case, multifocal firm white nodules spread in all pulmonary lobes were observed. In one animal, a focally extensive area of malacia associated with haemorrhage was noted in the encephalon. Histologically, multifocal granulomatous pneumonia or bronchopneumonia, associated with eggs and larvae in blood vessels, lung interstitium, alveoli, and sometimes in bronchi and bronchioles was observed. Adult nematodes were seen within blood vessels. The lesion observed in the brain was characterized as a focally extensive area of malacia associated with gitter cells, haemorrhage, thrombosis and a free intralesional larva. Through molecular techniques, seven positive samples of Angiostrongylus cantonensis were obtained, including the brain sample, and a positive sample of Angiostrongylus vasorum-like, all in Cerdocyon thous. The positive sample for A. vasorum showed 97% similarity with sequences deposited in GenBank, suggesting a new species or subspecies of Angiostrongylus sp. Infection of Lycalopex gymnocercus by Angiostrongylus spp. was confirmed by histological evaluation.

Keywords

Anatomopathological findingsAngiostongylus spp.molecular detectionverminous pneumonia
Type
Research Article
Information
Parasitology , Volume 146 , Issue 5 , April 2019 , pp. 617 - 624
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Copyright
Copyright © Cambridge University Press 2018 

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Footnotes

*

Laboratory of Protozoology and Vector-borne Rickettsiosis, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.

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