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Machado M, Queiroz-Machado CRR, Gardner DR, Castro MB, Câmara ACL, Pimentel LA, Galiza GJN, Riet-Correa F. Leucaena leucocephala toxicity in Brazilian horses. Toxicon 2024; 240:107655. [PMID: 38382883 DOI: 10.1016/j.toxicon.2024.107655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/16/2024] [Accepted: 02/18/2024] [Indexed: 02/23/2024]
Abstract
Leucaena leucocephala poisoning is reported in horses in different Brazilian regions. The poisoning occurred one month after the horses were introduced into paddocks invaded by the plant or after 10 days of consuming cut Leucaena administered as the only food. Affected horses showed moderate to severe hair loss on the mane and tail, orthokeratotic hyperkeratosis with marked follicular telogenization, and hyperplasia of thyroid follicular cells. Mimosin concentration in leaves (5.5 mg/g) was determined by a new HLPC-UV method which is also reported.
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Affiliation(s)
- Mizael Machado
- Plataforma de Investigación en Salud Animal (PSA), Instituto Nacional de Investigación Agropecuaria (INIA), Estación Experimental del Norte, Tacuarembó, Uruguay.
| | - Cintia R R Queiroz-Machado
- Centro Universitario Regional (CENUR) Noreste, Universidad de la República (UdelaR), Tacuarembó, Uruguay
| | - Dale R Gardner
- Poisonous Plant Research Laboratory, Agriculture Research Service, United States Department of Agriculture, Logan, USA
| | - Márcio B Castro
- Veterinary Pathology Laboratory, College of Agronomy and Veterinary Medicine, University of Brasília, Brasilia, Distrito Federal, Brazil
| | - Antônio Carlos L Câmara
- Large Animal Veterinary Teaching Hospital, College of Agronomy and Veterinary Medicine, University of Brasília, Brasilia, Distrito Federal, Brazil
| | - Luciano A Pimentel
- Setor de Patologia Veterinária, Hospital Universitário de Medicina Veterinária, Universidade Federal do Recôncavo da Bahia (UFRB), Cruz das Almas, Bahia, Brazil
| | - Glauco J N Galiza
- Programa de Pós-graduação em Ciência e Saúde Animal, Universidade Federal de Campina Grande (UFCG), Patos, Paraíba, Brazil
| | - Franklin Riet-Correa
- Programa de Pós-graduação em Ciências Animais nos Trópicos, Universidade Federal da Bahia (UFBA), Salvador, Bahia, Brazil
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2
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Oliveira GAS, Soares YGS, Silva CG, Soares LA, Brito Júnior JRC, Dantas AFM, Galiza GJN. Platynosomum (Trematoda: Dicrocoeliidae) infection in barn owls (Tyto alba) in Northeastern Brazil. Vet Parasitol Reg Stud Reports 2024; 48:100981. [PMID: 38316508 DOI: 10.1016/j.vprsr.2024.100981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/19/2023] [Accepted: 01/01/2024] [Indexed: 02/07/2024]
Abstract
Platynosomum spp. are parasites that inhabit the gallbladder and bile ducts of various mammals and birds worldwide. Most studies of Platynosomum spp. in birds focus on the observation and morphological characterization of the parasite through parasitological or molecular examinations, with scarce literature describing anatomopathological alterations, mainly histopathological. We report the case of a male barn owl infected with Platynosomum spp.. At necropsy, the barn owl showed dilation with parasites and fibrosis of the intrahepatic bile ducts and gallbladder. Microscopically, it was possible to identify trematodes in the bile ducts associated with a lymphoplasmacytic inflammatory infiltrate. The morphological structures of the worms were described on histopathology and direct examination. The presence of parasitism that is usually cosmopolitan in wild animals represents a risk to the biodiversity of fauna in the region, as well as a warning about the spread and maintenance of the biological cycle of the worm in humans and domestic animals.
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Affiliation(s)
- Guilherme A S Oliveira
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil.
| | - Yanca G S Soares
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Caroline G Silva
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Laynaslan A Soares
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - João R C Brito Júnior
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Antonio F M Dantas
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Glauco J N Galiza
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
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3
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Souto EPF, Oliveira AM, Cardoso DF, Figueiredo LWP, Kommers GD, Galiza GJN, Mota RA, Dantas AFM. Osteosarcoma in a free-living yellow armadillo (Euphractus sexcinctus). J Comp Pathol 2023; 206:9-12. [PMID: 37717411 DOI: 10.1016/j.jcpa.2023.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/01/2023] [Accepted: 08/19/2023] [Indexed: 09/19/2023]
Abstract
An adult male free-living yellow armadillo (Euphractus sexcinctus) was found by hunters and referred for clinical evaluation because of a tumour-like lesion on the carapace. The animal was lethargic and weak with severe dehydration, enophthalmos and cachexia, and was euthanized because of its very poor clinical condition. Necropsy revealed a whitish, exophytic, irregular and moist mass (7 × 6.5 × 1.5 cm) in the caudal third of the carapace. On cut section, the mass was hard, compact, irregular and whitish. Histopathology revealed a densely cellular, expansive, poorly delimited neoplasm composed of malignant mesenchymal cells arranged in islands and cords, interspersed by numerous areas of irregularly mineralized osteoid matrix. Neoplastic cells were intensely immunolabelled for vimentin. The diagnosis of a high-grade osteosarcoma of osteoblastic subtype was based on the clinical, gross, histopathological and immunohistochemical findings. This first report of an osteosarcoma in an armadillo expands the list of armadillo diseases and will assist the management of these animals by veterinarians.
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Affiliation(s)
- Erick P F Souto
- Postdoctoral Research Internship, National Council for Scientific and Technological Development, Federal Rural University of Pernambuco, Recife, Pernambuco, Brazil; Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil.
| | - Artefio M Oliveira
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Débora F Cardoso
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Lucas W P Figueiredo
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Glaucia D Kommers
- Pathology Department, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Glauco J N Galiza
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Rinaldo A Mota
- Postdoctoral Research Internship, National Council for Scientific and Technological Development, Federal Rural University of Pernambuco, Recife, Pernambuco, Brazil; Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Antonio F M Dantas
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
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Soares YGS, Ferreira JS, Campos ÉM, Alves RC, Leite IM, Soares LA, Ferreira MAS, Dantas AFM, Riet-Correa F, Galiza GJN. Hepatic arteriovenous malformation in a calf. J Comp Pathol 2023; 205:27-32. [PMID: 37619448 DOI: 10.1016/j.jcpa.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/29/2023] [Accepted: 07/26/2023] [Indexed: 08/26/2023]
Abstract
A case of hepatic arteriovenous malformation is described in a calf that presented with a marked increase in abdominal volume and died 12 h after birth. At necropsy, the calf had marked abdominal distension and haemoperitoneum. The left hepatic lobe was reduced in size and covered by slightly whitish and intensely vascularized membranous tissue. At the edge of the left lobe there were cystic structures filled with translucent fluid. On cut surface, there were multiple cavitations well delimited by whitish walls and multiple dilated blood vessels that communicated with the cavitations. Histopathology revealed an increase in the number of vascular structures of variable calibre within loose fibrous connective tissue. The diagnosis of hepatic arteriovenous malformation was based on the lesions and confirmed by immunohistochemistry. Hepatic arteriovenous malformations are rare in all species, have not been described in cattle and should be included as a cause of mortality in neonates with post-partum haemoperitoneum.
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Affiliation(s)
- Yanca G S Soares
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil.
| | - Jefferson S Ferreira
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Édipo M Campos
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Rodrigo C Alves
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Ialys M Leite
- Multidisciplinary Health Residency Program, Laboratory of Animal Pathology, University Veterinary Hospital, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Laynaslan A Soares
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Mirele A S Ferreira
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Antonio F M Dantas
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Franklin Riet-Correa
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Glauco J N Galiza
- Postgraduate Program in Science and Animal Health, Federal University of Campina Grande, Patos, Paraíba, Brazil
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Souto EPF, Oliveira AM, Hoffmann AR, Mota RA, Galiza GJN, Dantas AFM. Cutaneous phaeohyphomycosis in a greater bulldog bat (Noctilio leporinus) in northeastern Brazil. J Comp Pathol 2023; 201:37-40. [PMID: 36701871 DOI: 10.1016/j.jcpa.2022.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 11/11/2022] [Accepted: 12/29/2022] [Indexed: 01/26/2023]
Abstract
An adult male greater bulldog bat (Noctilio leporinus) was found dead in a suburban area in the municipality of Patos, Paraiba, northeastern Brazil. At post-mortem examination, the bat was emaciated and had multifocal to coalescent grey, crusted, dry, scaly cutaneous lesions, irregularly distributed over the dorsal thoracoabdominal region, muzzle, labial commissures, ears and dorsoventral surfaces of the patagia. Histopathology revealed numerous longitudinal and transverse sections of fungal organisms, with weakly basophilic walls, associated with multifocal areas of ulceration of the epidermis, necrosis, rupture and discontinuity of collagen fibres in the dermis without any inflammatory response. Molecular identification matched the organism to Cladosporium spp, Curvularia spp, Exserohilum spp, Bipolaris spp (100%) and Alternaria spp (97%), all of which have been associated with phaeohyphomycosis. Phaeohyphomycosis should be included as a differential diagnosis of cutaneous lesions in chiropterans.
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Affiliation(s)
- E P F Souto
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil.
| | - A M Oliveira
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - A R Hoffmann
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - R A Mota
- Laboratory of Infectious Diseases, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Recife, Pernambuco, Brazil
| | - G J N Galiza
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - A F M Dantas
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
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Souto EPF, Maia LA, Neto EGM, Kommers GD, Junior FG, Riet-Correa F, Galiza GJN, Dantas AFM. Pythiosis in Equidae in Northeastern Brazil: 1985-2020. J Equine Vet Sci 2021; 105:103726. [PMID: 34607686 DOI: 10.1016/j.jevs.2021.103726] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 10/20/2022]
Abstract
The epidemiologic, clinical, pathologic, microbiological and immunohistochemical findings of pythiosis in equidae in northeastern Brazil are described. From January 1985 to December 2020 the Laboratory of Animal Pathology of the Federal University of Campina Grande received 1,331 tissue samples of equidae, 202 (15.17%) of which were diagnosed as pythiosis. Equidae of both sexes with ages varying from 4 months to 25 years were affected. Most animals were mixed breed (79.7%) and reared in an extensive system (73.26%). The disease occurred throughout the year but the highest incidence (70.29%) was noted after the rainy season. The clinical course was always chronic. The lesions were preferentially located on the limbs and ventral thoracoabdominal wall and characterized by nodules or tumor-like masses with ulcerations and serosanguineous discharge. The cut surface showed fistulous tracts containing kunkers. The direct examination of the kunkers and microbiological culture revealed sparsely septate and branched hyaline hyphae. Histopathology revealed a marked inflammatory infiltrate of eosinophils with multifocal well-defined areas of eosinophil necrosis and collagenolysis and intralesional negatively-stained hyphal profiles; in the donkey, a pyogranulomatous inflammatory infiltrate was noted surrounding these areas. Immunohistochemistry for Pythium insidiosum revealed strong immunolabelling of the hyphae. Pythiosis occurs endemically in equidae in northeastern Brazil, with seasonal variation in the incidence. The intralesional kunkers establishes an accurate presumptive diagnosis, but confirmation should preferably be performed through histopathology associated with immunohistochemistry, culture-based or molecular methods.
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Affiliation(s)
- Erick Platiní F Souto
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil.
| | - Lisanka A Maia
- Laboratory of Animal Pathology, Federal Institute of Paraiba, Sousa, Paraiba, Brazil
| | - Eldine G Miranda Neto
- Large Animal Medical Clinic, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Glaucia D Kommers
- Pathology Department, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Felício Garino Junior
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Franklin Riet-Correa
- Post-Graduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Glauco J N Galiza
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Antonio F M Dantas
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
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Souto EPF, Maia LA, Virgínio JP, Carneiro RS, Kommers GD, Riet-Correa F, Galiza GJN, Dantas AFM. Pythiosis in cats in northeastern Brazil. J Mycol Med 2020; 30:101005. [PMID: 32522404 DOI: 10.1016/j.mycmed.2020.101005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/06/2020] [Accepted: 05/18/2020] [Indexed: 12/11/2022]
Abstract
The epidemiological, clinical and anatomopathological aspects of pythiosis in cats in northeastern Brazil are described. From January 2000 to December 2018 the Laboratory of Animal Pathology of the Federal University of Campina Grande received 1928 tissue samples of cats, three of which were diagnosed as pythiosis. Grossly, the cats showed a multinodular mass in the oral cavity associated with facial deformity (case 1), a large multinodular mass thickening the jejunum wall (case 2), and an ulcerated nodule in the skin at the base of the tail (case 3). Histologically, pyogranulomatous inflammation and necrosis, with intralesional predominantly negatively stained hyphae, were observed in all cases. Immunohistochemistry for Pythium insidiosum revealed strong immunolabelling of the hyphae. The diagnosis of pythiosis was based on the epidemiological, clinical and anatomopathological findings, and was confirmed by immunohistochemistry. Although uncommon in cats, pythiosis should be readily considered as a differential diagnosis of chronic pyogranulomatous infections of the gastrointestinal tract and skin, especially in endemic areas, where the disease is often diagnosed in other animal species.
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Affiliation(s)
- E P F Souto
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil.
| | - L A Maia
- Laboratory of Animal Pathology, Federal Institute of Paraiba, Sousa, Paraiba, Brazil
| | - J P Virgínio
- Laboratory of Animal Pathology, Federal Institute of Paraiba, Sousa, Paraiba, Brazil
| | - R S Carneiro
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - G D Kommers
- Pathology Department, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - F Riet-Correa
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - G J N Galiza
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - A F M Dantas
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
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Souto EPF, Maia LA, Olinda RG, Galiza GJN, Kommers GD, Miranda-Neto EG, Dantas AFM, Riet-Correa F. Pythiosis in the Nasal Cavity of Horses. J Comp Pathol 2016; 155:126-129. [PMID: 27406311 DOI: 10.1016/j.jcpa.2016.06.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 05/28/2016] [Accepted: 06/05/2016] [Indexed: 11/30/2022]
Abstract
Two cases of nasal pythiosis are reported in horses from the semi-arid region of northeastern Brazil. From January 1986 to December 2015, the Laboratory of Animal Pathology, Federal University of Campina Grande received 830 equine samples, 156 (18.79%) of which were diagnosed with pythiosis. Of these, two horses (1.28%), a male and a female adult cross-breed, had lesions in the nasal cavity. Both horses had access to water reservoirs. Clinically, they had swelling in the rhinofacial region and a serosanguineous nasal discharge. Macroscopically, in case 1, the lesion affected the nasal vestibule, extending to the alar cartilage and nasal septum. In case 2, the lesion extended through the turbinates and the meatuses of the nasal cavity, as well as the ethmoid region. In both cases, the lesions were characterized by having a yellow-grey granular surface with cavitations of different sizes containing coral-like masses of necrotic tissue (kunkers). Histologically, multifocal necrotizing eosinophilic rhinitis associated with hyphae (2-8 μm) similar to Pythium insidiosum were observed. In case 2, the lesions extended to the muscle, cartilage and bone adjacent to the nasal cavity and lungs. The diagnosis was confirmed by immunohistochemistry. It is concluded that nasal pythiosis occurs sporadically in horses in the semi-arid region of northeastern Brazil where cutaneous pythiosis is prevalent.
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Affiliation(s)
- E P F Souto
- Laboratory of Veterinary Pathology, Universidade Federal de Campina Grande, Patos, PB, Brazil
| | - L A Maia
- Laboratory of Veterinary Pathology, Universidade Federal de Campina Grande, Patos, PB, Brazil
| | - R G Olinda
- Laboratory of Veterinary Pathology, Universidade Federal de Campina Grande, Patos, PB, Brazil
| | - G J N Galiza
- Laboratory of Veterinary Pathology, Universidade Federal de Campina Grande, Patos, PB, Brazil
| | - G D Kommers
- Pathology Department, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - E G Miranda-Neto
- Medical Clinic for Large Animals, Universidade Federal de Campina Grande, Patos, PB, Brazil
| | - A F M Dantas
- Laboratory of Veterinary Pathology, Universidade Federal de Campina Grande, Patos, PB, Brazil
| | - F Riet-Correa
- Laboratory of Veterinary Pathology, Universidade Federal de Campina Grande, Patos, PB, Brazil.
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Trost ME, Inkelmann MA, Galiza GJN, Silva TM, Kommers GD. Occurrence of tumours metastatic to bones and multicentric tumours with skeletal involvement in dogs. J Comp Pathol 2013; 150:8-17. [PMID: 24011903 DOI: 10.1016/j.jcpa.2013.07.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/13/2013] [Accepted: 07/03/2013] [Indexed: 11/19/2022]
Abstract
The skeletons of 110 dogs with malignant tumours of different origins were examined by necropsy examination over a 3-year period to identify bone metastases. Twenty-one cases of metastatic or multicentric tumours with bone involvement were recorded. In general, more female dogs presented with bony metastases; however, when the dogs with mammary tumours were omitted, the gender distribution of the cases was approximately equivalent. The mammary gland was the primary site of most of the metastatic bone lesions, followed by the musculoskeletal system and the respiratory system. The majority (77%) of metastases were grossly visible and present in multiple bones. However, in 23% of the cases, the metastases could be diagnosed only at the microscopical level. The vertebrae and the humerus were the most frequently affected bones regardless of the primary site and the histogenesis of the tumours. The results of this study revealed a high prevalence of bone metastases and/or bone involvement in dogs with multicentric tumours.
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Affiliation(s)
- M E Trost
- Laboratório de Patologia Veterinária, Departamento de Patologia, Universidade Federal de Santa Maria, Av. Roraima 1000, Camobi 97105-900, Santa Maria, RS, Brazil
| | - M A Inkelmann
- Laboratório de Patologia Veterinária, Departamento de Patologia, Universidade Federal de Santa Maria, Av. Roraima 1000, Camobi 97105-900, Santa Maria, RS, Brazil
| | - G J N Galiza
- Laboratório de Patologia Veterinária, Departamento de Patologia, Universidade Federal de Santa Maria, Av. Roraima 1000, Camobi 97105-900, Santa Maria, RS, Brazil
| | - T M Silva
- Laboratório de Patologia Veterinária, Departamento de Patologia, Universidade Federal de Santa Maria, Av. Roraima 1000, Camobi 97105-900, Santa Maria, RS, Brazil
| | - G D Kommers
- Laboratório de Patologia Veterinária, Departamento de Patologia, Universidade Federal de Santa Maria, Av. Roraima 1000, Camobi 97105-900, Santa Maria, RS, Brazil.
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Silva MLCR, Galiza GJN, Dantas AFM, Oliveira RN, Iamamoto K, Achkar SM, Riet-Correa F. Outbreaks of Eastern equine encephalitis in northeastern Brazil. J Vet Diagn Invest 2012; 23:570-5. [PMID: 21908293 DOI: 10.1177/1040638711403414] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Outbreaks of eastern equine encephalitis observed from May 2008 to August 2009 in the Brazilian states of Pernambuco, Ceará, and Paraíba are reported. The disease occurred in 93 farms affecting 229 equids with a case fatality rate of 72.92%. Main clinical signs were circling, depression or hyperexcitability, ataxia, and progressive paralysis with a clinical manifestation period of 3-15 days. Main histologic lesions were a diffuse lymphocytic encephalomyelitis with neuronal death, satellitosis, neuronophagia, and hemorrhages being more severe in the cerebral gray matter of the telencephalon, diencephalon, and mesencephalon. Some animals also had areas of malacia in the telencephalon, thalamus, and basal nuclei. From 1 case, the virus was isolated by mice inoculation, and in other 13 cases was identified as Eastern equine encephalitis virus by semi-nested reverse transcription polymerase chain reaction. After DNA sequencing, all samples were identified as eastern equine encephalitis through the BLASTn analysis, but samples from the Ceará and Paraíba states corresponded to the same cluster, while the sample from the state of Pernambuco corresponded to a different cluster.
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Affiliation(s)
- Maria L C R Silva
- Veterinary Hospital, Federal University of Campina Grande (UFCG), Campus of Patos, 58700-000 Patos, Paraíba, Brazil
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