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Salmonella Agona em Perus (Meleagris gallopavo) de criações comerciais no Brasil 全文
2015
Mirela Caroline Vilela de Oliveira | Marcos Paulo Vieira Cunha | Maria Gabriela Xavier de Oliveira | Pedro Henrique de Lima Filsner | Andrea Micke Moreno | Paulo Eduardo Brandão | Terezinha Knöbl
Salmonella Agona em Perus (Meleagris gallopavo) de criações comerciais no Brasil 全文
2015
Mirela Caroline Vilela de Oliveira | Marcos Paulo Vieira Cunha | Maria Gabriela Xavier de Oliveira | Pedro Henrique de Lima Filsner | Andrea Micke Moreno | Paulo Eduardo Brandão | Terezinha Knöbl
Salmonella spp. é um dos principais agentes envolvidos em casos de doenças de origem alimentar em humanos, responsável por perdas significativas na avicultura. O objetivo deste estudo foi investigar a presença de Salmonella spp. em fezes de perus comerciais no Brasil. Foram colhidos suabes fecais de 14 lotes de perus comerciais (pool de seis aves/lote). Os suabes foram submetidos aos procedimentos de isolamento bacteriológico convencionais e a detecção de DNA do agente foi realizada através da técnica de PCR. Salmonella spp. foi detectada em um total de nove lotes dos 14 avaliados. As amostras foram negativas na identificação molecular dos sorovares Enteritidis e Typhimurium. Os isolados foram encaminhados ao laboratório de referência para sorotipagem e identificados como S. Agona; um patógeno considerado emergente em vários países.
显示更多 [+] 显示较少 [-]Salmonella Agona em Perus (Meleagris gallopavo) de criações comerciais no Brasil | Salmonella Agona in Turkeys (Meleagris gallopavo) in commercial farms from Brazil 全文
2015
Oliveira, Mirela Caroline Vilela de | Cunha, Marcos Paulo Vieira | Oliveira, Maria Gabriela Xavier de | Filsner, Pedro Henrique de Lima | Moreno, Andrea Micke | Brandão, Paulo Eduardo | Knöbl, Terezinha
Salmonella spp. é um dos principais agentes envolvidos em casos de doenças de origem alimentar em humanos, responsável por perdas significativas na avicultura. O objetivo deste estudo foi investigar a presença de Salmonella spp. em fezes de perus comerciais no Brasil. Foram colhidos suabes fecais de 14 lotes de perus comerciais (pool de seis aves/lote). Os suabes foram submetidos aos procedimentos de isolamento bacteriológico convencionais e a detecção de DNA do agente foi realizada através da técnica de PCR. Salmonella spp. foi detectada em um total de nove lotes dos 14 avaliados. As amostras foram negativas na identificação molecular dos sorovares Enteritidis e Typhimurium. Os isolados foram encaminhados ao laboratório de referência para sorotipagem e identificados como S. Agona; um patógeno considerado emergente em vários países. | Salmonella spp. is one of the major players involved in cases of foodborne diseases in humans and is responsible for significant losses in the poultry industry. The aim of this study was to investigate the presence of Salmonella spp. in feces of commercial turkeys from Brazil. Fecal swabs from 14 turkey farms (pool of six poults/flocks) were collected. The swabs were subject to the conventional bacteriological isolation procedures and to DNA detection of the agent trough PCR. Salmonella spp. was present in a total of nine from 14 turkey farms evaluated. The samples were negative on molecular identification for serovars Enteritidis and Typhimurium. Isolated strains submitted to the reference laboratory for serotyping were identified as S. Agona that has been described as emergent pathogen in several countries.
显示更多 [+] 显示较少 [-]Expression of proliferating cell nuclear antigen in the endometrium of mares during estrus and at early diestrus 全文
2015
Geórgia Duna Mansour | Lio Moreira | Ana Maria Reis Ferreira
Expression of proliferating cell nuclear antigen in the endometrium of mares during estrus and at early diestrus 全文
2015
Geórgia Duna Mansour | Lio Moreira | Ana Maria Reis Ferreira
Immunohistochemical expression of proliferating cell nuclear antigen (PCNA) was evaluated in the endometrium of mares during estrus and at early diestrus. Three samples were collected by endometrial biopsy from 10 mares, on estrus/ second day, in the ovulation day and seven days after the ovulation day. PCNA expression was high in luminal epithelium and low in endometrial glands on samples taken on estrus/second day and on the ovulation day (p < 0.05). For samples collected on the seventh day following ovulation, the averaged PCNA immunostaining was higher in glandular epithelium (p < 0.05). The study revealed that luminal epithelial cells exhibit higher proliferation during estrus and glandular epithelial cells exhibited higher proliferation during diestrus.
显示更多 [+] 显示较少 [-]Expressão do antígeno núcleo celular proliferante no endométrio de éguas durante o estro e início do diestro | Expression of proliferating cell nuclear antigen in the endometrium of mares during estrus and at early diestrus 全文
2015
Mansour, Geórgia Duna | Moreira, Lio | Ferreira, Ana Maria Reis
A expressão do antígeno núcleo celular proliferante (ANCP) foi avaliada no endométrio de éguas durante o estro e início do diestro. Em cada uma de dez éguas foram efetuadas biópsias do endométrio em três momentos dos respectivos ciclos reprodutivos: segundo dia do estro, dia da ovulação e sete dias após a ovulação. Nas amostras colhidas no segundo dia do estro e no dia da ovulação, a expressão do ANCP foi elevada no epitélio luminal e baixa nas glândulas endometriais (p < 0,05). Nas amostras colhidas no sétimo dia após a ovulação, a média de ANCP imunologicamente corado foi maior no epitélio glandular (p < 0,05). O estudo revelou que as células do epitélio luminal apresentaram a maior proliferação durante o estro e que as células epiteliais glandulares apresentaram a maior proliferação durante o diestro. | Immunohistochemical expression of proliferating cell nuclear antigen (PCNA) was evaluated in the endometrium of mares during estrus and at early diestrus. Three samples were collected by endometrial biopsy from 10 mares, on estrus/ second day, in the ovulation day and seven days after the ovulation day. PCNA expression was high in luminal epithelium and low in endometrial glands on samples taken on estrus/second day and on the ovulation day (p < 0.05). For samples collected on the seventh day following ovulation, the averaged PCNA immunostaining was higher in glandular epithelium (p < 0.05). The study revealed that luminal epithelial cells exhibit higher proliferation during estrus and glandular epithelial cells exhibited higher proliferation during diestrus.
显示更多 [+] 显示较少 [-]Perfil oxidativo e funcional de sêmen bovino criopreservado em diferentes estações do ano 全文
2015
Mariana de Paula Rodrigues | Octávio Fabián Bao Tarragó | Rubens Paes de Arruda | Leticia Zoccolaro Oliveira | Ricardo Pimenta Bertolla | Marcilio Nichi | Valquiria Hyppolito Barnabe
Perfil oxidativo e funcional de sêmen bovino criopreservado em diferentes estações do ano 全文
2015
Mariana de Paula Rodrigues | Octávio Fabián Bao Tarragó | Rubens Paes de Arruda | Leticia Zoccolaro Oliveira | Ricardo Pimenta Bertolla | Marcilio Nichi | Valquiria Hyppolito Barnabe
Bovinos taurinos, em clima tropical, mostram menores índices de fertilidade devido ao estresse térmico e oxidativo testicular. Essa alta incidência de alterações espermáticas é potencializada pela grande quantidade de ácidos graxos poli-insaturados (PUFA) presentes nos espermatozoides taurinos. Embora os PUFA aumentem a sensibilidade celular à peroxidação lipídica, são essenciais para a maleabilidade de membrana e promovem maior proteção celular durante a criopreservação. Devido aos relatos de que animais e vegetais de clima frio possuem maior concentração de PUFA nas células, o presente estudo teve como objetivo comparar o efeito da estação do ano sobre a qualidade espermática de taurinos e zebuínos. Foram avaliadas amostras criopreservadas de 10 touros da raça Nelore (Bos taurus indicus) e 10 da raça Simental (Bos taurus taurus), coletadas durante inverno e verão. Após a descongelação, foram realizados testes espermáticos de motilidade e vigor, testes de integridade de membrana plasmática (MPI–Eosina/Nigrosina), integridade acrossomal (MAI-POPE), grau de fragmentação de DNA (DNAf-Ensaio Cometa) e atividade citoquímica mitocondrial (ACM-DAB). Adicionalmente, avaliou-se a suscetibilidade das células espermáticas à peroxidação lipídica induzida, pela mensuração das substâncias reativas ao ácido tiobarbitúrico (TBARS) e malondialdeído (MDA). No grupo Nelore, foi observada maior motilidade espermática pós-descongelação (26,50% inverno; 13,30% verão) e maior ACM (22,34% inverno; 13,30% verão) durante o inverno. No grupo Simental, não houve diferença de época do ano nas variáveis. Concluiu-se que, apesar de sofrerem maior estresse térmico, nos animais taurinos não foi observado efeito da estação do ano sobre a qualidade espermática, o que pode estar relacionado a uma maior concentração de PUFA em sua composição seminal.
显示更多 [+] 显示较少 [-]Perfil oxidativo e funcional de sêmen bovino criopreservado em diferentes estações do ano | Oxidative and functional status of bovine semen cryopreserved in different seasons 全文
2015
Rodrigues, Mariana de Paula | Tarragó, Octávio Fabián Bao | Arruda, Rubens Paes de | Oliveira, Leticia Zoccolaro | Bertolla, Ricardo Pimenta | Nichi, Marcilio | Barnabe, Valquiria Hyppolito
Bovinos taurinos, em clima tropical, mostram menores índices de fertilidade devido ao estresse térmico e oxidativo testicular. Essa alta incidência de alterações espermáticas é potencializada pela grande quantidade de ácidos graxos poli-insaturados (PUFA) presentes nos espermatozoides taurinos. Embora os PUFA aumentem a sensibilidade celular à peroxidação lipídica, são essenciais para a maleabilidade de membrana e promovem maior proteção celular durante a criopreservação. Devido aos relatos de que animais e vegetais de clima frio possuem maior concentração de PUFA nas células, o presente estudo teve como objetivo comparar o efeito da estação do ano sobre a qualidade espermática de taurinos e zebuínos. Foram avaliadas amostras criopreservadas de 10 touros da raça Nelore (Bos taurus indicus) e 10 da raça Simental (Bos taurus taurus), coletadas durante inverno e verão. Após a descongelação, foram realizados testes espermáticos de motilidade e vigor, testes de integridade de membrana plasmática (MPI–Eosina/Nigrosina), integridade acrossomal (MAI-POPE), grau de fragmentação de DNA (DNAf-Ensaio Cometa) e atividade citoquímica mitocondrial (ACM-DAB). Adicionalmente, avaliou-se a suscetibilidade das células espermáticas à peroxidação lipídica induzida, pela mensuração das substâncias reativas ao ácido tiobarbitúrico (TBARS) e malondialdeído (MDA). No grupo Nelore, foi observada maior motilidade espermática pós-descongelação (26,50% inverno; 13,30% verão) e maior ACM (22,34% inverno; 13,30% verão) durante o inverno. No grupo Simental, não houve diferença de época do ano nas variáveis. Concluiu-se que, apesar de sofrerem maior estresse térmico, nos animais taurinos não foi observado efeito da estação do ano sobre a qualidade espermática, o que pode estar relacionado a uma maior concentração de PUFA em sua composição seminal. | In general, Taurus bulls under tropical conditions demonstrate reduced fertility due to heat and oxidative stress on testicular tissue. This high incidence of sperm damage is generally enhanced by the large amount of polyunsaturated fatty acids (PUFA) naturally present in bull sperm. Despite PUFA increase cellular sensitivity to lipid peroxidation, they are essential for membrane fluidity and also promote high cellular protection during cryopreservation process. Some reports related that animals and plants provided from cold weather present higher cellular concentration of PUFA, so the present study aims to compare the effect of the season on sperm quality of Taurus and Zebu bulls. Cryoprotected semen samples of 10 Nelore (Bos taurus indicus) and 10 Simmental (Bos taurus taurus) bulls were analyzed during winter and summer seasons. After freezing-thawing process, semen samples were submitted to sperm motility and vigor analysis, to tests of plasma membrane integrity (MPI–Eosin/Nigrosin), acrosomal integrity (MAI-POPE), DNA fragmentation degree (DNAf-Comet Assay) and high mitochondrial activity (ACM-DAB). Moreover, frozen-thawed semen samples were induced to lipid peroxidation for measurement of thiobarbituric acid reactive substances (TBARS) and malondialdehyde (MDA) concentration. Higher post-thawing sperm motility (26.50% winter; 13.30% summer) and ACM (22.34% winter; 13.30% summer) were observed during the winter in Nelore group. In Simmental group, no differences were observed for the studied variables. It was concluded that, despite the heat stress, no seasonal effect on sperm quality was observed in Taurus cattle, which may be related to higher concentration of PUFA in seminal composition.
显示更多 [+] 显示较少 [-]Protocol for expert report on animal welfare in case of companion animal cruelty suspicion 全文
2015
Janaina Hammerschmidt | Carla Forte Maiolino Molento
Protocol for expert report on animal welfare in case of companion animal cruelty suspicion 全文
2015
Janaina Hammerschmidt | Carla Forte Maiolino Molento
Animal welfare expert reports may support court decisions when animal abuse or maltreatment is suspected. The objective of this work is to adapt animal welfare assessment protocols to identify companion animal abuse. The proposed protocol includes four indicator categories: nutritional, comfort, health and behavioral. To reach the overall conclusion regarding the situation evaluated, the final decisions for each group of indicators, classified as inadequate, regular and adequate, must be integrated into a single result, which will be the final welfare degree. This protocol employs a simple integration method, based on thresholds for inclusion in each of the five animal welfare degrees reported as overall conclusion for the assessment: very low, low, regular, high or very high welfare. Low and very low degrees are considered non-acceptable and are reported as abuse or maltreatment. Regular welfare is considered acceptable if corrective measures are assured. High and very high degrees are considered desirable for animal welfare. The protocol allows differentiation of animal welfare status to better decide whether an animal is under abuse, maltreatment or negligence. We hope that the refinement of the recognition of crimes against animals, especially considering cases where no physical lesion is present, coupled with a standardized protocol will improve perception of animal suffering, facilitate the field work of those involved in this type of investigation, and offer a contribution to the improvement of animal welfare in our society through proper action and crime reduction.
显示更多 [+] 显示较少 [-]Protocolo de perícia em bem-estar animal para diagnóstico de maus-tratos contra animais de companhia | Protocol for expert report on animal welfare in case of companion animal cruelty suspicion 全文
2015
Hammerschmidt, Janaina | Molento, Carla Forte Maiolino
As decisões judiciais sobre casos de maus-tratos contra animais podem ser subsidiadas por laudos de peritos em bem-estar animal. O objetivo deste trabalho foi adaptar protocolos de diagnóstico de bem-estar animal para a identificação de maus-tratos contra animais de companhia. O protocolo é composto por quatro conjuntos de indicadores: nutricionais, de conforto, sanitários e comportamentais, os quais devem ser classificados em inadequados, regulares e adequados. As decisões finais para cada conjunto de indicadores devem ser integradas em um único resultado, o qual será o grau final de bem-estar. O protocolo utiliza uma forma de integração simplificada, baseada em limites para a inclusão em cada um dos cinco graus de bem-estar, descritos como: muito baixo, baixo, regular, alto e muito alto. Graus de bem-estar baixo e muito baixo são considerados inaceitáveis e devem ser descritos como maus-tratos. Grau de bem-estar regular é considerado aceitável se medidas corretivas forem asseguradas. Graus de bem-estar alto e muito alto são considerados desejáveis para o bem-estar animal. O protocolo permite a diferenciação do grau de bem-estar em escala compatível para a decisão em relação à ocorrência de maus-tratos. Nós esperamos que o refinamento das formas de identificação de crimes contra animais, especialmente nos casos nos quais não existem lesões físicas, juntamente com um protocolo padronizado, possam aprimorar a percepção do sofrimento animal, além de facilitar o trabalho de campo das pessoas envolvidas nestas investigações, oferecendo assim uma contribuição para incrementar o bem-estar animal, por meio de ações adequadas e de redução da criminalidade. | Animal welfare expert reports may support court decisions when animal abuse or maltreatment is suspected. The objective of this work is to adapt animal welfare assessment protocols to identify companion animal abuse. The proposed protocol includes four indicator categories: nutritional, comfort, health and behavioral. To reach the overall conclusion regarding the situation evaluated, the final decisions for each group of indicators, classified as inadequate, regular and adequate, must be integrated into a single result, which will be the final welfare degree. This protocol employs a simple integration method, based on thresholds for inclusion in each of the five animal welfare degrees reported as overall conclusion for the assessment: very low, low, regular, high or very high welfare. Low and very low degrees are considered non-acceptable and are reported as abuse or maltreatment. Regular welfare is considered acceptable if corrective measures are assured. High and very high degrees are considered desirable for animal welfare. The protocol allows differentiation of animal welfare status to better decide whether an animal is under abuse, maltreatment or negligence. We hope that the refinement of the recognition of crimes against animals, especially considering cases where no physical lesion is present, coupled with a standardized protocol will improve perception of animal suffering, facilitate the field work of those involved in this type of investigation, and offer a contribution to the improvement of animal welfare in our society through proper action and crime reduction.
显示更多 [+] 显示较少 [-]Effect of artificial shading on performance and reproductive parameters of semi-confined young Brangus bulls 全文
2015
Marcos Chiquitelli Neto | Cristiane Gonçalves Titto | Evaldo Antonio Lencioni Titto | Eliane Vianna da Costa e Silva | José Nicolau Prospero Puoli Filho | Thays Mayra da Cunha Leme | Fábio Luís Henrique | Alfredo Manuel Fraco Pereira
Effect of artificial shading on performance and reproductive parameters of semi-confined young Brangus bulls 全文
2015
Marcos Chiquitelli Neto | Cristiane Gonçalves Titto | Evaldo Antonio Lencioni Titto | Eliane Vianna da Costa e Silva | José Nicolau Prospero Puoli Filho | Thays Mayra da Cunha Leme | Fábio Luís Henrique | Alfredo Manuel Fraco Pereira
Thirty Brangus bulls were used in a 90-d study to assess the effect of artificial shading on the performance and reproductive characteristics of semi-confined cattle. Animals were kept in four one-ha paddocks in two groups of eight for shade treatment (5 m2/animal of 80% solar block shade cloth) and two groups of seven animals in no-shade treatment. Each treatment had two homogeneous groups, each divided into heavy-bulls (351-450 kg) and light-bulls (300-350 kg). Time spent under shade, time standing, average daily gain, testicular development and sperm quality were investigated. Animals spent 24% of the daylight under the shade and no-shaded bulls spent more time standing (P < 0.05). No difference was found in average daily gain (P > 0.05) and testicular development between shaded and no-shaded animals. However, scrotal perimeter was higher for shaded light animals compared to no-shaded light bulls (P < 0.10). Sperm motility increase during the experimental period for shaded animals (P < 0.05) and sperm abnormalities were higher for the shaded ones (P < 0.05). Although the results did not indicate pronounced benefits on cattle performance, this resource was an important alternative because it appears to provide an improvement in some reproductive parameters and ensure a better thermal comfort to the animals.
显示更多 [+] 显示较少 [-]Efeito do sombreamento artificial no desempenho e parâmetros reprodutivos de novilhos Brangus em semiconfinamento | Effect of artificial shading on performance and reproductive parameters of semi-confined young Brangus bulls 全文
2015
Chiquitelli Neto, Marcos | Titto, Cristiane Gonçalves | Titto, Evaldo Antonio Lencioni | Costa e Silva, Eliane Vianna da | Puoli Filho, José Nicolau Prospero | Leme, Thays Mayra da Cunha | Henrique, Fábio Luís | Pereira, Alfredo Manuel Fraco
Foi avaliado o efeito do sombreamento artificial sobre o desempenho produtivo e reprodutivo de animais semiconfinados em trinta novilhos Brangus durante o período de 90 dias. Os animais foram mantidos em quatro piquetes de 1 há cada, divididos em dois grupos de oito animais cada no tratamento sombra (5 m2/animal de tela de sombreamento de polipropileno com 80% de retenção solar) e dois grupos no tratamento sem acesso a sombra com sete animais em cada. As variáveis analisadas foram: o tempo gasto na sombra, o tempo em pé, ganho de peso, desenvolvimento testicular e qualidade espermática. Os animais passaram 24% do dia sob a sombra e os que não tiveram acesso a sombra permaneceram mais tempo em pé (P < 0,05). Não foi encontrada diferença no ganho de peso (P > 0,05) e no desenvolvimento testicular entre animais com acesso a sombra e os que não tinham acesso. No entanto, o perímetro escrotal foi maior para os animais submetidos ao sombreamento comparado com novilhos sem acesso a sombra (P < 0,10). A motilidade espermática aumentou durante o período experimental para os animais com acesso a sombra (P < 0,05), porem as anormalidades espermáticas também foram maiores para este grupo (P < 0,05). Embora os resultados não indiquem claramente os benefícios relacionados ao uso de sombreamento no desempenho produtivo de bovinos semiconfinados, este recurso se mostra como uma alternativa importante, pois proporcionou melhoria de alguns parâmetros reprodutivos e propiciou um melhor conforto térmico para os animais. | Thirty Brangus bulls were used in a 90-d study to assess the effect of artificial shading on the performance and reproductive characteristics of semi-confined cattle. Animals were kept in four one-ha paddocks in two groups of eight for shade treatment (5 m2/animal of 80% solar block shade cloth) and two groups of seven animals in no-shade treatment. Each treatment had two homogeneous groups, each divided into heavy-bulls (351-450 kg) and light-bulls (300-350 kg). Time spent under shade, time standing, average daily gain, testicular development and sperm quality were investigated. Animals spent 24% of the daylight under the shade and no-shaded bulls spent more time standing (P < 0.05). No difference was found in average daily gain (P > 0.05) and testicular development between shaded and no-shaded animals. However, scrotal perimeter was higher for shaded light animals compared to no-shaded light bulls (P < 0.10). Sperm motility increase during the experimental period for shaded animals (P < 0.05) and sperm abnormalities were higher for the shaded ones (P < 0.05). Although the results did not indicate pronounced benefits on cattle performance, this resource was an important alternative because it appears to provide an improvement in some reproductive parameters and ensure a better thermal comfort to the animals.
显示更多 [+] 显示较少 [-]Effect of artificial shading on performance and reproductive parameters of semi-confined young Brangus bulls 全文
2015
Chiquitelli Neto, M. | Titto, C.G. | Titto, E.A.L. | Costa e Silva, T.S. | Puoli Filho, J.N.P | Leme, T.M. | Henrique, F.L. | Pereira, A.M.F. | Vasconcellos, S.A.
Thirty Brangus bulls were used in a 90-d study to assess the effect of artificial shading on the performance and reproductive characteristics of semi-confined cattle. Animals were kept in four one-ha paddocks in two groups of eight for shade treatment (5 m²/animal of 80% solar block shade cloth) and two groups of seven animals in no-shade treatment. Each treatment had two homogeneous groups, each divided into heavy-bulls (351-450 kg) and light-bulls (300-350 kg). Time spent under shade, time standing, average daily gain, testicular development and sperm quality were investigated. Animals spent 24% of the daylight under the shade and no-shaded bulls spent more time standing (P < 0.05). No difference was found in average daily gain (P > 0.05) and testicular development between shaded and no-shaded animals. However, scrotal perimeter was higher for shaded light animals compared to no-shaded light bulls (P < 0.10). Sperm motility increase during the experimental period for shaded animals (P < 0.05) and sperm abnormalities were higher for the shaded ones (P < 0.05). Although the results did not indicate pronounced benefits on cattle performance, this resource was an important alternative because it appears to provide an improvement in some reproductive parameters and ensure a better thermal comfort to the animals.
显示更多 [+] 显示较少 [-]c-Kit immunoexpression patterns differ in melanotic and amelanotic canine oral melanomas 全文
2015
Tarso Felipe Teixeira | Luciana Boffoni Gentile | Marco Antonio Leon Roman | Marco Antonio Gioso | Maria Lucia Zaidan Dagli
c-Kit immunoexpression patterns differ in melanotic and amelanotic canine oral melanomas 全文
2015
Tarso Felipe Teixeira | Luciana Boffoni Gentile | Marco Antonio Leon Roman | Marco Antonio Gioso | Maria Lucia Zaidan Dagli
Melanomas are the most common oral malignancy in dogs. Cell proliferation and connexin expression has been shown to differ in canine melanotic and amelanotic oral melanomas. This study aimed to analyze the c-Kit protein expression in melanotic and amelanotic melanomas from canine buccal cavity. A total of 34 canine buccal melanomas (19 melanotic and 15 amelanotic).were collected. The amelanotic melanomas presented faster evolution and higher incidence of metastasis than melanotic tumors. A significantly higher number of c-Kit positive cells were observed in amelanotic neoplasms. In addition, the intensity of c-Kit immunolabeling was predominantly stronger in amelanotic melanomas. These results confirm a potential role for c-Kit in canine oral melanomas with clear differences in expression patterns between the two histological types of tumor, melanotic and amelanotic. This study highlights the importance of a detailed study of c-Kit mutations in canine oral melanomas to better understand the molecular mechanisms implicated in the development of this disease.
显示更多 [+] 显示较少 [-]Análise qualitativa quanto à diferença da imunoexpressão do gene c-Kit em melanomas melânicos e amelânicos da cavidade oral em cães | c-Kit immunoexpression patterns differ in melanotic and amelanotic canine oral melanomas 全文
2015
Teixeira, Tarso Felipe | Gentile, Luciana Boffoni | Roman, Marco Antonio Leon | Gioso, Marco Antonio | Dagli, Maria Lucia Zaidan
Melanomas são as mais frequentes neoplasias malignas da cavidade bucal de cães. Sabe-se que a proliferação de células e expressão de conexina diferem em melanomas melanóticos e amelanóticos da cavidade bucal de cães. Este estudo analisou a expressão da proteína c-Kit em melanomas melanóticos e amelanóticos da cavidade bucal canina. Um total de 34 melanomas bucais caninos (19 melanóticos e 15 amelanóticos) foram coletados. Os melanomas amelanóticos apresentaram evolução mais rápida e maior incidência de metástase. Foi constatado um número significativamente maior de células positivas para c-Kit em neoplasias amelanóticas. Além disso, a intensidade de imunomarcação de c-Kit foi predominantemente mais forte em melanomas amelanóticos. Estes resultados confirmam um papel potencial para c-Kit em melanomas orais caninos, com diferenças claras em padrões de expressão entre os dois tipos histológicos de tumor, melanóticos e amelanóticos. Este trabalho destaca a importância de um estudo detalhado das mutações c-Kit em melanomas orais caninos para ser possível a melhor compreensão dos mecanismos moleculares envolvidos no desenvolvimento da doença. | Melanomas are the most common oral malignancy in dogs. Cell proliferation and connexin expression has been shown to differ in canine melanotic and amelanotic oral melanomas. This study aimed to analyze the c-Kit protein expression in melanotic and amelanotic melanomas from canine buccal cavity. A total of 34 canine buccal melanomas (19 melanotic and 15 amelanotic).were collected. The amelanotic melanomas presented faster evolution and higher incidence of metastasis than melanotic tumors. A significantly higher number of c-Kit positive cells were observed in amelanotic neoplasms. In addition, the intensity of c-Kit immunolabeling was predominantly stronger in amelanotic melanomas. These results confirm a potential role for c-Kit in canine oral melanomas with clear differences in expression patterns between the two histological types of tumor, melanotic and amelanotic. This study highlights the importance of a detailed study of c-Kit mutations in canine oral melanomas to better understand the molecular mechanisms implicated in the development of this disease.
显示更多 [+] 显示较少 [-]Seroprevelance of Bovine Brucellosis in the Nile Delta Region, Egypt: A Preliminary Study 全文
2015
Gwida, M. | El-Ashker, M. | El-Diasty, M. | Melzer, Falk | Neubauer, Heinrich Karl Johann
There is currently an obvious discrepancy between the officially reported data for seroprevalence of human and animal Brucellosis in Egypt and the data obtained from scientific reports. The present study gives a preliminary data about the seroprevalence of Brucella infection in dairy cattle herds from three large Egyptian Governorates located in the Nile Delta region. The study population consisted of 2.830 dairy cattle from private farms in Dakahlia, Damietta and Port- Said Governorates. Serum samples were randomly collected from 811 cows (203 animals showed reproductive disorders group 1); while 608 cows were apparently healthy (group 2). The collected sera were tested by Rose Bengal Test (RBT), Enzyme Linked Immunosorbant Assay (ELISA) and Fluorescent Polarization Assay (FPA). The overall seroprevelance among the tested cows in the first group was 52.2% (106/203). ELISA showed the highest number of positive reactors (n = 138; 67.9%) followed by FPA (n = 120; 59.11%) and RBT (n = 109; 53.7%); while in group 2, the number of positive animals were 25 (4.2%), 20 (3.3%) and 11 (1.8%) by using RBT, ELISA and FPA, respectively. It is very likely that brucellosis Could poses a great risk to consumers in the study region and Could be a potential source of infection to animal keepers, veterinarians and slaughterhouse workers. Further studies are warranted to unravel the epidemiological situation of human, animal and environmental brucellosis in other regions of Egypt.
显示更多 [+] 显示较少 [-]Probe-free real-time reverse transcription polymerase chain reaction assays for the detection and typing of porcine reproductive and respiratory syndrome virus in Canada 全文
2015
Eschbaumer, Michael | Li, W.M. | Wernike, Kerstin | Marshall, F. | Czub, M.
Probe-free real-time reverse transcription polymerase chain reaction assays for the detection and typing of porcine reproductive and respiratory syndrome virus in Canada 全文
2015
Eschbaumer, Michael | Li, W.M. | Wernike, Kerstin | Marshall, F. | Czub, M.
Porcine reproductive and respiratory syndrome (PRRS) has tremendous impact on the pork industry in North America. The molecular diagnosis of infection with PRRS virus (PRRSV) is hampered by its considerable strain diversity. In this study, 43 previously published or newly developed primers for probe-free real-time reverse transcription polymerase chain reaction (RT-PCR) were evaluated on their sensitivity, specificity, reproducibility, and repeatability, using a diverse panel of 36 PRRSV strains as well as other arteriviruses and unrelated porcine viruses. Three primer pairs had excellent diagnostic and analytical sensitivity on par with a probe-based reference assay, absolute specificity to virus genotype and species, as well as over 95% reproducibility and repeatability across a wide dynamic range.
显示更多 [+] 显示较少 [-]Probe-free real-time reverse transcription polymerase chain reaction assays for the detection and typing of porcine reproductive and respiratory syndrome virus in Canada 全文
2015
Eschbaumer, Michael | Li, Wansi (May) | Wernike, Kerstin | Marshall, Frank | Czub, Markus
Porcine reproductive and respiratory syndrome (PRRS) has tremendous impact on the pork industry in North America. The molecular diagnosis of infection with PRRS virus (PRRSV) is hampered by its considerable strain diversity. In this study, 43 previously published or newly developed primers for probe-free real-time reverse transcription polymerase chain reaction (RT-PCR) were evaluated on their sensitivity, specificity, reproducibility, and repeatability, using a diverse panel of 36 PRRSV strains as well as other arteriviruses and unrelated porcine viruses. Three primer pairs had excellent diagnostic and analytical sensitivity on par with a probe-based reference assay, absolute specificity to virus genotype and species, as well as over 95% reproducibility and repeatability across a wide dynamic range.
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