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R C Siqueira, S C Rahal, L R Inamassu, M J Mamprim, M Felix, M S Castilho, L R Mesquita, V L Ribeiro, C R Teixeira, F B Rassy
This study describes the osteology and radiology of the pelvic limb in maned wolves. Ten (five live and five dead) maned wolves (Chrysocyon brachyurus), five males and five females, aged from 2 to 7 years old were used. Digital radiographs were taken and recorded for both pelvic limbs in all animals. Osteology was correlated with the radiographic images. The pelvis had a rectangular shape, and the obturator foramen (foramen obturatum) was oval. The femoral neck (collum femoris) was short and thick. The greater trochanter (trochanter major) extended proximally to near the dorsum of the femoral head (caput ossis femoris)...
September 20, 2017: Anatomia, Histologia, Embryologia
Jenna D Hinton, Luis R Padilla, Priscilla H Joyner, Rodney Schnellbacher, Timothy F Walsh, Copper Aitken-Palmer
Gastric dilatation volvulus (GDV) was identified in six adult maned wolves ( Chrysocyon brachyurus ) housed at the Smithsonian Conservation Biology Institute in Front Royal, Virginia, and the Dickerson Park Zoo in Springfield, Missouri. Four individuals were found dead in their enclosures, and GDV was diagnosed postmortem based on radiographic and necropsy findings. Two individuals were diagnosed with GDV antemortem, with one wolf surviving following surgical intervention and supportive management. A concurrent splenic torsion was identified in three of six cases...
June 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
Copper Aitken-Palmer, Dipl A C Z M, Lisa H Ware, Lacey Braun, Kenneth Lang, Priscilla H Joyner
Maned wolves ( Chrysocyon brachyurus ) maintained in ex situ populations challenge veterinarians and managers with high neonatal mortality and parental incompetence. These challenges led to the development of a novel diagnostic approach for pregnancy detection using radiographic imaging without anesthesia or sedation. To do this, a specialized crate was constructed to easily contain a single maned wolf, allowing the capture of lateral projection radiographic images of the abdomen prior to and throughout a 66-day pregnancy (days 20, 34, 48, and 55 of 66)...
March 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
Julia Angélica Gonçalves Silveira, Mirella Lauria D'Elia, Isabela de Oliveira Avelar, Lara Ribeiro de Almeida, Hudson Andrade Dos Santos, Danielle Ferreira de Magalhães Soares, Múcio Flávio Barbosa Ribeiro, Walter Dos Santos Lima, Roselene Ecco
An adult free-ranged female maned wolf was rescued from a periurban area subject to anthropogenic disturbances in the Minas Gerais, Brazil. The animal presented poor body condition and anemia. The clinical condition rapidly deteriorated culminating in dead and a necropsy was performed. The main gross lesions were marked anemia and blood content in the intestines accompanied by many types of parasites. The protozoa Rangelia vitalii was identified by histopathological analysis predominantly within the cytoplasm of endothelial cells of capillaries of the small intestine...
December 2016: International Journal for Parasitology. Parasites and Wildlife
Mariana Malzoni Furtado, Erika Midori Kida Hayashi, Susan Dora Allendorf, Claudio José Coelho, Anah Tereza de Almeida Jácomo, Jane Megid, José Domingues Ramos Filho, Leandro Silveira, Natália Mundim Tôrres, José Soares Ferreira Neto
Human population growth around protected areas increases the contact between wild and domestic animals, promoting disease transmission between them. This study investigates the exposure of free-ranging wild carnivores and domestic dogs to canine distemper virus (CDV) and parvovirus in Emas National Park (ENP) in the Cerrado savanna of central Brazil. Serum samples were collected from 169 wild carnivores, including the maned wolf (Chrysocyon brachyurus), crab-eating fox (Cerdocyon thous), hoary fox (Pseudalopex vetulus), puma (Puma concolor), ocelot (Leopardus pardalis), pampas cat (Leopardus colocolo), jaguarundi (Herpailurus yagouaroundi), striped hog-nosed skunk (Conepatus semistriatus) and coati (Nasua nasua), and from 35 domestic dogs living on rural properties bordering ENP...
September 2016: EcoHealth
Jamile de Moura Bubadué, Nilton Cáceres, Renan Dos Santos Carvalho, Carlo Meloro
Species morphological changes can be mutually influenced by environmental or biotic factors, such as competition. South American canids represent a quite recent radiation of taxa that evolved forms very disparate in phenotype, ecology and behaviour. Today, in the central part of South America there is one dominant large species (the maned wolf, Chrysocyon brachyurus) that directly influence sympatric smaller taxa via interspecific killing. Further south, three species of similar sized foxes (Lycalopex spp.) share the same habitats...
2016: Evolutionary Biology
Carlyle Mendes Coelho, Cristiano Schetini de Azevedo, Marcelo Alcino de Barros Vaz Guimarães, Robert John Young
Environmental enrichment is a technique that may reduce the stress of nonhuman animals in captivity. Stress may interfere with normal behavioral expression and affect cognitive decision making. Noninvasive hormonal studies can provide important information about the stress statuses of animals. This study evaluated the effectiveness of different environmental enrichment treatments in the diminution of fecal glucocorticoid metabolites (stress indicators) of three captive maned wolves (Chrysocyon brachyurus). Correlations of the fecal glucocorticoid metabolite levels with expressed behaviors were also determined...
October 2016: Journal of Applied Animal Welfare Science: JAAWS
Paulo de Souza Junior, Flavio Machado de Moraes, Natan da Cruz de Carvalho, Evandro Alves Canelo, Roberto Thiesen, André Luiz Quagliatto Santos
Chrysocyon brachyurus (maned wolf) is the biggest South American canid and has a high frequency of dental injuries, both in the wild and in captivity. Thus, veterinary procedures are necessary to preserve the feeding capacity of hundreds of captive specimens worldwide. The aim of this study was to investigate the mandibular morphometry of the maned wolf with emphasis on the establishment of anatomic references for anesthetic block of the inferior alveolar and mental nerves. Therefore, 16 measurements in 22 mandibles of C...
March 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
Juliana P S Mol, Semíramis A Soave, Andréia P Turchetti, Guilherme R G Pinheiro, Angela T Pessanha, Marcelo C C Malta, Herlandes P Tinoco, Luiza A Figueiredo, Nelder F Gontijo, Tatiane A Paixão, Ricardo T Fujiwara, Renato L Santos
Leishmania (Leishmania) infantum is the cause of visceral leishmaniasis in the Americas. The disease is transmitted mostly through the bite of the invertebrate vector, the phlebotomine Lutzomyia longipalpis in the New World. Although the domestic dog is considered the most important reservoir of the disease, other mammalian, including wildlife, are susceptible to infection. The goal of this study was to perform xenodiagnosis to evaluate the capacity of naturally infected maned wolves (Chrysocyon brachyurus) and bush dogs (Speothos venaticus) to transmit Leishmania infantum to female sand flies (L...
September 15, 2015: Veterinary Parasitology
Susana González, Mariana Cosse, María del Rosario Franco, Louise Emmons, Carly Vynne, José Maurício Barbanti Duarte, Marcelo D Beccacesi, Jesús E Maldonado
The maned wolf (Chrysocyon brachyurus) is one of the largest South American canids, and conservation across this charismatic carnivore's large range is presently hampered by a lack of knowledge about possible natural subdivisions which could influence the population's viability. To elucidate the phylogeographic patterns and demographic history of the species, we used 2 mtDNA markers (D-loop and cytochrome b) from 87 individuals collected throughout their range, in Argentina, Bolivia, Brazil, and Uruguay. We found moderate levels of haplotype and nucleotide diversity, and the 14 D-loop haplotypes were closely related...
2015: Journal of Heredity
Ana Maria Jansen, Samanta C C Xavier, André Luiz R Roque
In this study, we report and discuss the results generated from over 20 years of studies of the Trypanosoma cruzi sylvatic transmission cycle. Our results have uncovered new aspects and reviewed old concepts on issues including reservoirs, true generalist species, association of mammalian species with distinct discrete typing units - DTUs, distribution of T. cruzi genotypes in the wild, mixed infections, and T. cruzi transmission ecology. Using parasitological and serological tests, we examined T. cruzi infection in 7,285 mammalian specimens from nine mammalian orders dispersed all over the Brazilian biomes...
November 2015: Acta Tropica
S N Vitaliano, H S Soares, A H H Minervino, A L Q Santos, K Werther, M F V Marvulo, D B Siqueira, H F J Pena, R M Soares, C Su, S M Gennari
This study aimed to isolate and genotype T. gondii from Brazilian wildlife. For this purpose, 226 samples were submitted to mice bioassay and screened by PCR based on 18S rRNA sequences. A total of 15 T. gondii isolates were obtained, including samples from four armadillos (three Dasypus novemcinctus, one Euphractus sexcinctus), three collared anteaters (Tamandua tetradactyla), three whited-lipped peccaries (Tayassu pecari), one spotted paca (Cuniculus paca), one oncilla (Leopardus tigrinus), one hoary fox (Pseudalopex vetulus), one lineated woodpecker (Dryocopus lineatus) and one maned wolf (Chrysocyon brachyurus)...
December 2014: International Journal for Parasitology. Parasites and Wildlife
Guilherme R Blume, Janildo L Reis Junior, Chris H Gardiner, Eric P Hoberg, Patricia A Pilitt, Rafael Veríssimo Monteiro, Fabiano J F de Sant'Ana
The current report describes granulomatous pneumonia due to Spirocerca lupi in 2 free-ranging maned wolves (Chrysocyon brachyurus). Both wolves had multiple, white, 1-1.5 cm in diameter, soft, encapsulated granulomas in the caudal lung lobes, which contained centrally placed parasites on cut sections. Microscopically, there was granulomatous inflammation with numerous intralesional sections of spirurid nematodes. Representative complete adult specimens of nematodes derived from these lesions were submitted for parasitological exam and identified as the spirurid S...
November 2014: Journal of Veterinary Diagnostic Investigation
Rodrigo Otávio Silveira Silva, Mirella Lauria D'Elia, Erika Procópio Tostes Teixeira, Pedro Lúcio Lithg Pereira, Danielle Ferreira de Magalhães Soares, Álvaro Roberto Cavalcanti, Aleksander Kocuvan, Maja Rupnik, André Luiz Quagliatto Santos, Carlos Augusto Oliveira Junior, Francisco Carlos Faria Lobato
Despite some case reports, the importance of Clostridium perfringens and Clostridium difficile for wild carnivores remains unclear. Thus, the objective of this study was to identify C. perfringens and C. difficile strains in stool samples from wild carnivore species in Brazil. A total of 34 stool samples were collected and subjected to C. perfringens and C. difficile isolation. Suggestive colonies of C. perfringens were then analyzed for genes encoding the major C. perfringens toxins (alpha, beta, epsilon and iota) and the beta-2 toxin (cpb2), enterotoxin (cpe) and NetB (netb) genes...
August 2014: Anaerobe
D A Fleischman, B B Chomel, R W Kasten, M R André, L R Gonçalves, R Z Machado
SUMMARY Wild canids are potential hosts for numerous species of Bartonella, yet little research has been done to quantify their infection rates in South America. We sought to investigate Bartonella seroprevalence in captive wild canids from 19 zoos in São Paulo and Mato Grosso states, Brazil. Blood samples were collected from 97 wild canids belonging to four different native species and three European wolves (Canis lupus). Indirect immunofluorescent antibody testing was performed to detect the presence of B...
February 2015: Epidemiology and Infection
Amy E M Johnson, Elizabeth W Freeman, Mark Colgin, Caitlin McDonough, Nucharin Songsasen
Assisted reproductive techniques, such as ovarian manipulation and artificial insemination, are useful for enhancing genetic management of threatened wildlife maintained ex situ. In this study, we used noninvasive fecal hormone monitoring to investigate (1) the influence of pairing with a male on endocrine responses of female maned wolves (Chrysocyon brachyurus) to a GnRH agonist (deslorelin) and (2) the efficiency of recombinant LH (reLH) on ovulation induction in females housed alone. Deslorelin (2.1 mg Ovuplant) was given to females that were either paired with a male (n = 4) or housed alone (n = 7); the implant was removed 7 to 11 days postimplantation...
July 1, 2014: Theriogenology
Amy E M Johnson, Elizabeth W Freeman, David E Wildt, Nucharin Songsasen
We assessed the influences of medium osmolality, cryoprotectant and cooling and warming rate on maned wolf (Chrysocyon brachyurus) spermatozoa. Ejaculates were exposed to Ham's F10 medium (isotonic control) or to this medium plus NaCl (350-1000mOsm), sucrose (369 and 479mOsm), 1M glycerol (1086mOsm) or dimethyl sulfoxide (Me2SO, 1151mOsm) for 10 min. Each sample then was diluted back into Ham's medium and assessed for sperm motility and plasma membrane integrity. Although glycerol and Me2SO had no influence (P>0...
June 2014: Cryobiology
Chao Zhao, Xiufeng Yang, Honghai Zhang, Jin Zhang, Lei Chen, Weilai Sha, Guangshuai Liu
In this study, the complete mitochondrial genome of the maned wolf (Chrysocyon brachyurus), the unique species in Chrysocyon, was sequenced and reported for the first time using blood samples obtained from a female individual in Shanghai Zoo, China. Sequence analysis showed that the genome structure was in accordance with other Canidae species and it contained 12 S rRNA gene, 16 S rRNA gene, 22 tRNA genes, 13 protein-coding genes and 1 control region.
2016: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
Olney Vieira-da-Motta, Luiz Antonio Eckhardt-de-Pontes, Melissa Paes Petrucci, Israel Pereira dos Santos, Isabel Candia Nunes da Cunha, Ronaldo Gonçalves Morato
Both the study of Brazilian wild mammal fauna and the conditions that foster the preservation of endangered species, such as Brazilian Maned-wolf (Chrysocyon brachyurus), in wild life are of extreme importance. In order to study the resistance profile of microbiota bacterial colonizing Brazilian Maned-wolf, this work investigated samples from eight male captive and free roaming animals originating from different Brazilian geographical regions. Samples for microbiological purposes were collected with swabs and kept in appropriate transport medium...
December 2013: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
Laila M Proença, Jean C R Silva, Paula D Galera, Marília B Lion, Jader S Marinho-Filho, Alessandra Mara Alves Ragozo, Solange Maria Gennari, J P Dubey, Silvio Arruda Vasconcellos, Gisele Oliveira Souza, José Wilton Pinheiro, Vânia Lúcia de Assis Santana, Gilvan L França, Flávio H G Rodrigues
Domestic dogs are reservoirs for many infectious diseases and may represent a potential source of infection for wild canid populations. A serologic investigation of antibodies to Toxoplasma gondii, Neospora caninum, Brucella abortus, and Leptospira spp. was conducted on three maned wolves (Chrysocyon brachyurus) and seven crab-eating foxes (Cerdocyon thous), all free-living, at the Aguas Emendadas Ecological Station (ESECAE), Federal District, Brazil, between February and October 2006. Out of the 10 samples analyzed, eight (80%) were seropositive for T...
March 2013: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
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