PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Barisson J.D., Louro C.H., Dias S.J.T., Jojima F.S., Ferreira M.S. & Oliveira F.S. 2012. Anatomo-radiographic description of the axial skeleton of the crab-eating fox (Cerdocyon thous). Pesquisa Veterinária Brasileira 32(Supl.1):1-3. Departamento de Medicina Veterinária, Universidade Estadual de Maringá, Campus Umuarama, Cx. Postal 65, Umuarama, PR 87501-970, Brazil. E-mail: singaretti@ig.com.br The aim of this study was to describe the axial skeleton of a wild Brazilian carnivorous, the crab-eating fox (Cerdocyon thous). Five specimens of crab-eating fox were previously unfrozen for radiographic exams and their bones went through dissection and chemical maceration. This animal presents seven cervical vertebrae, and from the third on, they become shorter and wider than the other ones e the spinous process was makeable from the fifth cervical vertebrae on. There are thirteen thoracic vertebrae and the spinous process of the lumbar vertebrae, which are seven, decreases from the fifth on. The sacrum is formed by two vertebrae and there are twenty or twenty one caudal vertebrae. It can be concluded that the crab-eating fox axial skeleton is similar to that of the domestic dog.

• skeleton Cerdocyon thous crab-eating fox esqueleto axial cachorro-do-mato

Abstract in Portuguese:

RESUMO.- Barisson J.D., Louro C.H., Dias S.J.T., Jojima F.S., Ferreira M.S. & Oliveira F.S. 2012. Anatomo-radiographic description of the axial skeleton of the crab-eating fox (Cerdocyon thous). [Descrição anátomo-radiográfica do esqueleto axial do cachorro-do-mato (Cerdocyon thous).] Pesquisa Veterinária Brasileira 32(Supl.1):1-3. Departamento de Medicina Veterinária, Universidade Estadual de Maringá, Campus Umuarama, Cx. Postal 65, Umuarama, PR 87501-970, Brazil. E-mail: singaretti@ig.com.br O objetivo deste trabalho foi descrever o esqueleto axial de um carnívoro selvagem brasileiro, o cachorro-do-mato (Cer- docyon thous). Cinco animais foram previamente descongelados para exames radiográficos e posteriormente submetidos a dissecação óssea e maceração química. Os animais apresentavam sete vértebras cervicais e, à partir da terceira, eram mais curtas e largas e o processo espinhoso mais evidente a partir da quinta vértebra cervical. Há treze vértebras torácicas e o processo espinhoso das vértebras lombares, que são sete, diminui partir da quinta vértebra. O sacro é constituído por duas vértebras fundidas e há 20 ou 21 vértebras caudais. Pode-se concluir que o esqueleto axial do cachorro-do-mato se assemelha ao do cão doméstico.

Abstract in English:

ABSTRACT.- Mattos M.R.F., Simões-Mattos L., Pilati C., Silva L.D.M. & Domingues S.F.S. 2010. Intersexuality in a crab-eating fox (Cerdocyon thous). Pesquisa Veterinária Brasileira 30(6):510-514. Unidade Acadêmica de Garanhuns, Universidade Federal Rural de Pernambuco, Av. Bom Pastor s/n, Boa Vista, Garanhuns, PE 55292-270, Brazil. E-mail: mattos@uag.ufrpe.br Intersexuality is a reproductive pathology that has been described in wild animals in recent years. However, its occurrence and consequences remain obscure and therefore all aspects of this reproductive disorder deserve attention. The aim of this study is to report a case of intersexuality with probable absence of gonadal tissue in the crab-eating fox (Cerdocyon thous) native to Brazil. The animal has male external genitalia, but its prepuce and penis were both hypoplastic. Because of a clinical suspicion of bilateral cryptorchidism, a laparotomy was performed and the absence of prostate and gonads were revealed. The procedure also revealed vas deferentia, extending laterally from the each side of the bladder basis to the right and left abdominal wall muscles. The animal died one month later, and post mortem examination confirmed the absence of prostatic and gonadal tissues. Muscular structures similar to uterine horns and cervix were founded macroscopically and confirmed by optic microscopy. In addition, post mortem findings corroborate with penis hypoplasia, since penile bone presence was observed. The vasa deferentia had a normal tissue structure, although hypoplastic. In conclusion, the case of a crab-eating fox (Cerdocyon thous) reported here represents a proved intersexual animal with probable absence of gonadal tissue.

• Cerdocyon thous crab-eating fox intersexuality raposa intersexualidade

Abstract in Portuguese:

RESUMO.- Mattos M.R.F., Simões-Mattos L., Pilati C., Silva L.D.M. & Domingues S.F.S. 2010. Intersexuality in a crab-eating fox (Cerdocyon thous). [Intersexualidade em uma raposa (Cerdocyon thous).] Pesquisa Veterinária Brasileira 30(6):510-514. Unidade Acadêmica de Garanhuns, Universidade Federal Rural de Pernambuco, Av. Bom Pastor s/n, Boa Vista, Garanhuns, PE 55292-270, Brazil. E-mail: mattos@uag.ufrpe.br RESUMO.- [Intersexualidade em uma raposa (Cerdocyon thous).] A intersexualidade é uma das patologias reprodutivas, hereditária e/ou congênita, que têm sido mais reportada em animais selvagens nos últimos anos. Entretanto, suas ocorrências e conseqüências permanecem obscuras, sendo que todos os aspectos relacionados a este distúrbio reprodutivo merecem atenção. O objetivo deste estudo foi relatar um caso de intersexualidade com provável ausência de tecido gonadal em uma raposa (Cerdocyon thous) do Brasil. O animal apresentava sexo fenotípico masculino, mas seu prepúcio e pênis eram pequenos. Devido a uma suspeita clínica de criptorquidismo bilateral, foi realizada uma laparotomia, sendo, no procedimento cirúrgico, revelada a ausência de próstata e gônadas. Os ductos deferentes foram localizados lateralmente à bexiga, entendendo-se desde a sua base, inserindo-se na musculatura da parede abdominal direita e esquerda. Um mês após, o animal morreu e os achados necroscópicos confirmaram a ausência de tecidos prostático e gonadal. Entretanto, uma estrutura muscular histologicamente semelhante a cornos e cérvix uterinos foram encontradas. Além disso, pelo mesmo método, ratificou-se a ausência de próstata e o pênis exibiu aspecto normal contendo osso peniano. Os ductos deferentes apresentaram estrutura tecidual normal, porém hipoplásicos. Concluiu-se que o caso reportado no presente trabalho representa um exemplo de intersexualidade com provável ausência de tecido gonadal em um animal da espécie Cerdocyon thous.

Abstract in English:

ABSTRACT.- Rodrigues J., Meireles G.S., Carvalho Filho P.R., Ribeiro C.T., Flausino W. & Lopes C.W.G. 2008. [Sarcocystis cruzi (Apicomplexa: Sarcocystidae) in the crab-eating fox (Cerdocyon thous).] Sarcocystis cruzi (Apicomplexa: Sarcocystidae) no cachorro-do-mato (Cerdocyon thous). Pesquisa Veterinária Brasileira 28(11):561-564. Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: lopescwg@ufrrj.br Sporocysts of Sarcocystis were identified in feces samples of a crab-eating fox, and were orally given to a suckling calf; after 3 months of infection, sarcocysts morphologically similar to Sarcocystis cruzi were observed in cardiac and skeletal striated muscles. The cardiac muscles of this calf were orally given to a puppy free of coccidia, that shed sporocysts in its feces.with a prepatent and patent period of 11 and 12 days after infection, respectively. To compare the morphology of the sporocysts and cysts, a second puppy was fed on bovine cardiac muscles infected naturally, and sporocysts identical to those shed by the first dog were recovered from its feces. In spite of the significant difference between sporocysts found in the mucosa of the crab-eating fox and those shed by the first and second puppies, the species observed in this study was considered to be Sarcocystis cruzi, based on size of the sporocyts, morphology of the cyst wall, and the pray-predator cycle.

• Sarcocystis cruzi sporocysts cysts crab-eating fox Cerdocyon thous dogs cattle

Abstract in Portuguese:

ABSTRACT.- Rodrigues J., Meireles G.S., Carvalho Filho P.R., Ribeiro C.T., Flausino W. & Lopes C.W.G. 2008. [Sarcocystis cruzi (Apicomplexa: Sarcocystidae) in the crab-eating fox (Cerdocyon thous).] Sarcocystis cruzi (Apicomplexa: Sarcocystidae) no cachorro-do-mato (Cerdocyon thous). Pesquisa Veterinária Brasileira 28(11):561-564. Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: lopescwg@ufrrj.br Sporocysts of Sarcocystis were identified in feces samples of a crab-eating fox, and were orally given to a suckling calf; after 3 months of infection, sarcocysts morphologically similar to Sarcocystis cruzi were observed in cardiac and skeletal striated muscles. The cardiac muscles of this calf were orally given to a puppy free of coccidia, that shed sporocysts in its feces.with a prepatent and patent period of 11 and 12 days after infection, respectively. To compare the morphology of the sporocysts and cysts, a second puppy was fed on bovine cardiac muscles infected naturally, and sporocysts identical to those shed by the first dog were recovered from its feces. In spite of the significant difference between sporocysts found in the mucosa of the crab-eating fox and those shed by the first and second puppies, the species observed in this study was considered to be Sarcocystis cruzi, based on size of the sporocyts, morphology of the cyst wall, and the pray-predator cycle.