Cysticercosis in free-ranging agoutis (<i>Dasyprocta leporina</i>) in the Eastern Brazilian Amazon

The study describes the occurrence of cysticercosis in liver of 22 wild agoutis (Dasyprocta leporina) in the Brazilian Amazon. The phylogenetic analysis and microscopic characteristics of metacestodes in liver tissue sections, associated with the geographic distribution of the intermediate hosts indicated that a possibly novel Taenia sp. metacestode caused the parasitism. Additionally, two cases of hepatic co-infection by Taenia sp., Calodium sp. and Echinococcus oligarthra were also observed among the analyzed animals. The results point to the need for a better understanding of hepatotropic parasites among wild rodents in the Brazilian Amazon.

Keywords:
Cestoda; cysticercus; liver; rodent; Taenia

Authorship

Alex Junior Souza de Souza ^**Corresponding author: Alex Junior Souza de Souza. E-mail: souzajralex@gmail.com

Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo - USP, São Paulo, SP, BrasilUniversidade de São PauloBrasilSão Paulo, SP, BrasilDepartamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo - USP, São Paulo, SP, Brasil

Instituto de Ciências da Saúde, Universidade Paulista - UNIP, Campinas, SP, BrasilUniversidade PaulistaBrasilCampinas, SP, BrasilInstituto de Ciências da Saúde, Universidade Paulista - UNIP, Campinas, SP, Brasil

https://orcid.org/0000-0001-6201-2777

Andreza Pinheiro Malheiros

Seção de Hepatologia, Instituto Evandro Chagas - IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Belém, PA, BrasilMinistério da SaúdeBrasilBelém, PA, BrasilSeção de Hepatologia, Instituto Evandro Chagas - IEC, Secretaria de Vigilância em Saúde, Ministério da Saúde, Belém, PA, Brasil

https://orcid.org/0000-0002-2643-9754

André Antônio Corrêa das Chagas

https://orcid.org/0000-0001-8567-9961

Max Moreira Alves

Marcella Katheryne Marques Bernal

https://orcid.org/0000-0002-7229-8585

Liliane Almeida Carneiro

Centro Nacional de Primatas - CENP, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, PA, BrasilMinistério da SaúdeBrasilAnanindeua, PA, BrasilCentro Nacional de Primatas - CENP, Secretaria de Vigilância em Saúde, Ministério da Saúde, Ananindeua, PA, Brasil

Michele Soares Gomes-Gouvêa

Departamento de Gastroenterologia LIM-07, Instituto de Medicina Tropical - IMT, Universidade de São Paulo, São Paulo, SP, BrasilUniversidade de São PauloBrasilSão Paulo, SP, BrasilDepartamento de Gastroenterologia LIM-07, Instituto de Medicina Tropical - IMT, Universidade de São Paulo, São Paulo, SP, Brasil

https://orcid.org/0000-0001-5932-2360

Heloisa Marceliano Nunes

https://orcid.org/0000-0002-9335-6932

*Corresponding author: Alex Junior Souza de Souza. E-mail: souzajralex@gmail.com

Conflict of interest

The authors declared no conflict of interest.

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Figures

Figures (3)

Thumbnail

Figure 1
Sampling sites (blue spots) of 20 agoutis (Dasyprocta leporina) with hepatic cysticercosis on Marajó island, Brazilian Amazon, 2006-2009.

Thumbnail

Figure 2
Maximum-likelihood (T92 + G) tree based on partial nucleotide sequences of Cox-I (328 bp) gene of 17 Taenia species. The sequences are identified by the Genbank accession number and the 22 agouti’s Taenia sp. cysticerci were highlighted (●). A sequence of Echinococcus oligarthra (♦) obtained in the study was used as an outgroup. Bootstrap values (1,000 replicates) > 70% are listed at the nodes.

Thumbnail

Figure 3
Microscopic liver sections of agoutis (Dasyprocta leporina) with cysticercosis. a) Cysticercus lesion containing a fluid-filled bladder and a single monocephalic metacestode. Case #4. Hematoxylin-eosin, 4x; b) Invaginated scolex presenting two rows of hooks on the rostellum. Developing suckers and multiple calcareous corpuscles are also observed. Case #13. Hematoxylin-eosin, 10x; c) Bioperculated ellipsoid-shaped eggs compatible with Calodium sp. surrounded by focal fibrosis. Case #7. Hematoxylin-eosin, 40x; d) Cysticercus lesion (upper left) containing a single Taenia sp. metacestode and a hydatid cyst (down right) containing multiple Echinococcus oligarthra protoscoleces. Case #7. Hematoxylin-eosin, 4x.

Figure 1 Sampling sites (blue spots) of 20 agoutis (Dasyprocta leporina) with hepatic cysticercosis on Marajó island, Brazilian Amazon, 2006-2009.

Figure 2 Maximum-likelihood (T92 + G) tree based on partial nucleotide sequences of Cox-I (328 bp) gene of 17 Taenia species. The sequences are identified by the Genbank accession number and the 22 agouti’s Taenia sp. cysticerci were highlighted (●). A sequence of Echinococcus oligarthra (♦) obtained in the study was used as an outgroup. Bootstrap values (1,000 replicates) > 70% are listed at the nodes.

Figure 3 Microscopic liver sections of agoutis (Dasyprocta leporina) with cysticercosis. a) Cysticercus lesion containing a fluid-filled bladder and a single monocephalic metacestode. Case #4. Hematoxylin-eosin, 4x; b) Invaginated scolex presenting two rows of hooks on the rostellum. Developing suckers and multiple calcareous corpuscles are also observed. Case #13. Hematoxylin-eosin, 10x; c) Bioperculated ellipsoid-shaped eggs compatible with Calodium sp. surrounded by focal fibrosis. Case #7. Hematoxylin-eosin, 40x; d) Cysticercus lesion (upper left) containing a single Taenia sp. metacestode and a hydatid cyst (down right) containing multiple Echinococcus oligarthra protoscoleces. Case #7. Hematoxylin-eosin, 4x.

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Cysticercosis in free-ranging agoutis (<i>Dasyprocta leporina</i>) in the Eastern Brazilian Amazon

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[1] *Corresponding author: Alex Junior Souza de Souza. E-mail: souzajralex@gmail.com