Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 12 de 12
Filtrar
Mais filtros

Base de dados
Intervalo de ano de publicação
1.
Anim. Reprod. (Online) ; 17(4): e20200217, 2020. ilus
Artigo em Inglês | VETINDEX | ID: biblio-1461544

Resumo

Twin birth is a complex condition observed in most livestock animals, when the female gives birth to two or more offspring, generally out of the same mating. In cattle, it is a rare condition (3 to 5%) and depends on the genetic background and environmental factors. Twin birth is a result of multiple ovulations, being more common in dairy rather than in beef cattle. Calves could be monozygous or dizygous, with the same or of different sexes. When twins are born with different sexes, a sexual condition called Freemartinism occurs in between 90 to 97% of pregnancies, causing infertility in the female calf. Knowing that the twin rate is rare in commercial beef cattle, here we present an even rarer case of twin birth from two different sires after natural mating, also called heteropaternal superfecundation.


Assuntos
Masculino , Feminino , Animais , Bovinos , Animais Recém-Nascidos , Bovinos/embriologia , Comportamento Sexual Animal , Gêmeos , Prenhez
2.
Semina Ci. agr. ; 41(2): 703-710, Mar.-Apr. 2020. tab
Artigo em Inglês | VETINDEX | ID: vti-27813

Resumo

Neospora caninum is a widely distributed parasite, which significantly impacts reproduction in ruminants. This study aimed to survey the seroprevalence and risk factors associated with neosporosis infection in commercial herds of sheep in the northwest of Rio Grande do Sul, Brazil. Three hundred sheep serum samples were used to investigate anti-N. caninum antibodies using indirect immunofluorescence reaction at a 1:40 dilution. The presence of anti-N. caninum antibodies was detected in 20.3% (61/300) of the samples evaluated; however, positive reactions were observed in all (13/13) flocks sampled. Sheep breeds > 1 year of age had 1.2-fold higher risk for infection with N. caninum (odds ratio 2.2 [95% confidence interval 1-5.1]; P < 0.001). These findings should raise awareness on the importance of serological screening, identification of risk factors, and maintenance of preventive measures, such as not allowing dogs to contact sheep feed and not offering the placental remains of ruminants to canids.(AU)


Neospora caninum é um parasita amplamente distribuído e de grande importância para a reprodução de ruminantes. O objetivo deste estudo foi realizar um levantamento da soroprevalência e dos fatores de risco associados à neosporose em rebanhos comerciais de ovinos no noroeste do Rio Grande do Sul. Foram utilizadas 300 amostras de soro de ovelhas para investigar anti-N. caninum por Reação de Imunofluorescência Indireta (IFAT) com uma diluição de 1:40. A presença de anticorpos anti-N. caninum foi detectada em 20.3 % (61/300) das amostras avaliadas. Reações positivas foram observadas em todos (13/13) os rebanhos amostrados. Ovinos com mais de um ano tiveram 1.2 mais chances de serem infectados por N. caninum (odds ratio 2.2, intervalo de confiança 1-5.1) (P < 0.001). Com esses dados, chamamos atenção para a importância da triagem sorológica, identificação de fatores de risco e manutenção de medidas de prevalência, como não permitir que os cães entrem em contato com a alimentação das ovelhas e não oferecer os restos placentários dos ruminantes aos canídeos.(AU)


Assuntos
Animais , Estudos Soroepidemiológicos , Neospora/parasitologia , Neospora/patogenicidade , Doenças dos Ovinos/epidemiologia , Doenças dos Ovinos/imunologia
3.
Anim. Reprod. ; 17(4): e20200217, 2020. ilus
Artigo em Inglês | VETINDEX | ID: vti-761997

Resumo

Twin birth is a complex condition observed in most livestock animals, when the female gives birth to two or more offspring, generally out of the same mating. In cattle, it is a rare condition (3 to 5%) and depends on the genetic background and environmental factors. Twin birth is a result of multiple ovulations, being more common in dairy rather than in beef cattle. Calves could be monozygous or dizygous, with the same or of different sexes. When twins are born with different sexes, a sexual condition called Freemartinism occurs in between 90 to 97% of pregnancies, causing infertility in the female calf. Knowing that the twin rate is rare in commercial beef cattle, here we present an even rarer case of twin birth from two different sires after natural mating, also called heteropaternal superfecundation.(AU)


Assuntos
Animais , Masculino , Feminino , Bovinos , Bovinos/embriologia , Animais Recém-Nascidos , Comportamento Sexual Animal , Gêmeos , Prenhez
4.
Ciênc. rural (Online) ; 49(12): e20190144, 2019. map, tab
Artigo em Inglês | VETINDEX | ID: biblio-1480152

Resumo

Leptospirosis is a zoonosis that is widely distributed in tropical countries. This infection is also associated with reproductive losses in livestock, which has a significant economic impact. The objective of this study is to investigate the seroprevalence and risk factors associated with leptospiral infection in commercial sheep flocks from the northwestern mesoregion of Rio Grande do Sul. Serum samples were analyzed in 319 sheep using the Microscopic Agglutination Test (MAT). At the time of sampling, an individual and herd questionnaire was carried out to investigate the risk factors. On an individual level, positive reactions were observed in 5.6% (18/319) of the studied sera, with Sejroe being the most prevalent serogroup. Animals >3 years old were more likely to be seropositive than animals 1-3 years old (OR 14.4; 95% CI 1.9-110). The predominance of Sejroe serogroup in this manner draws attention to how subclinical infection is associated with economic losses. Therefore, the importance of maintaining measures for the prevention and control of leptospirosis among the sheep flocks of the studied region is reiterated.


A leptospirose é uma zoonose amplamente distribuída em países tropicais. Essa infecção também está associada a perdas reprodutivas na pecuária, apresentando uma relevância econômica notável. O objetivo deste estudo foi investigar a soroprevalência e os fatores de risco associados à infecção por leptospirose em rebanhos comerciais de ovinos da mesorregião noroeste do Rio Grande do Sul. Amostras de soro de 319 ovelhas foram analisadas pelo Teste de Aglutinação Microscópica (MAT). No momento da amostragem foi realizado um questionário individual e de rebanho para investigar os fatores de risco. No nível individual, reações positivas foram observadas em 5.6% (18/319) dos soros estudados, sendo Sejroe o sorogrupo mais prevalente. Animals >3 years old were more likely to be seropositive than animals 1-3 years old (OR 14.4; 95% CI 1.9-110). A predominância do sorogrupo Sejroe chama a atenção para a infecção subclínica associada a perdas econômicas. Portanto, reitera-se a importância da manutenção de medidas de prevenção e controle da leptospirose entre os rebanhos ovinos da região estudada.


Assuntos
Animais , Estudos Soroepidemiológicos , Leptospira , Leptospirose/epidemiologia , Ovinos/microbiologia , Brasil , Testes de Aglutinação/veterinária
5.
Ci. Rural ; 49(12): e20190144, Nov. 25, 2019. mapas, tab
Artigo em Inglês | VETINDEX | ID: vti-24747

Resumo

Leptospirosis is a zoonosis that is widely distributed in tropical countries. This infection is also associated with reproductive losses in livestock, which has a significant economic impact. The objective of this study is to investigate the seroprevalence and risk factors associated with leptospiral infection in commercial sheep flocks from the northwestern mesoregion of Rio Grande do Sul. Serum samples were analyzed in 319 sheep using the Microscopic Agglutination Test (MAT). At the time of sampling, an individual and herd questionnaire was carried out to investigate the risk factors. On an individual level, positive reactions were observed in 5.6% (18/319) of the studied sera, with Sejroe being the most prevalent serogroup. Animals >3 years old were more likely to be seropositive than animals 1-3 years old (OR 14.4; 95% CI 1.9-110). The predominance of Sejroe serogroup in this manner draws attention to how subclinical infection is associated with economic losses. Therefore, the importance of maintaining measures for the prevention and control of leptospirosis among the sheep flocks of the studied region is reiterated.(AU)


A leptospirose é uma zoonose amplamente distribuída em países tropicais. Essa infecção também está associada a perdas reprodutivas na pecuária, apresentando uma relevância econômica notável. O objetivo deste estudo foi investigar a soroprevalência e os fatores de risco associados à infecção por leptospirose em rebanhos comerciais de ovinos da mesorregião noroeste do Rio Grande do Sul. Amostras de soro de 319 ovelhas foram analisadas pelo Teste de Aglutinação Microscópica (MAT). No momento da amostragem foi realizado um questionário individual e de rebanho para investigar os fatores de risco. No nível individual, reações positivas foram observadas em 5.6% (18/319) dos soros estudados, sendo Sejroe o sorogrupo mais prevalente. Animals >3 years old were more likely to be seropositive than animals 1-3 years old (OR 14.4; 95% CI 1.9-110). A predominância do sorogrupo Sejroe chama a atenção para a infecção subclínica associada a perdas econômicas. Portanto, reitera-se a importância da manutenção de medidas de prevenção e controle da leptospirose entre os rebanhos ovinos da região estudada.(AU)


Assuntos
Animais , Estudos Soroepidemiológicos , Leptospira , Ovinos/microbiologia , Leptospirose/epidemiologia , Brasil , Testes de Aglutinação/veterinária
6.
Acta sci. vet. (Impr.) ; 46: Pub.1590-2018. tab, graf
Artigo em Português | VETINDEX | ID: biblio-1457880

Resumo

Background: Pleurisy is defined as an inflammation of the pleural membranes, usually caused by bacterial infections. It is considered the second most common reason for condemnations of swine carcass during slaughter. Prior to slaughter, pleurisy can causes discomfort to the animals, and during the slaughter, the carcass from affected animals, has to be trimmed, reducing the value to both the farmer and the plant, increasing the costs of disposal, and line speeds are reduced, increasing processing costs. The objective of this study was to verify the prevalence and to identify the bacterial agents associated with pleurisy lesions in pigs.Materials, Methods & Results: In this study, were used tissue samples from 4,536 piglets collected from the main swine producing regions of Brazil between the years 2013/2014. Samples were collected from animals that presented respiratory, enteric or nervous symptoms. Samples were sent to pathology and bacteriology examinations in a commercial laboratory. The pathogen isolates were classified according to the agent Pasteurella multocida (P. multocida), Haemophilus parasuis (HPS), Streptococcus suis (S. Suis), Actinobacillus pleuropneumoniae (APP) and Bordetella bronchiseptica (BB) stage of development and regional location of the case. Data were analyzed based on the frequency according to the age group using Fisher-test. Of the total number of animals with clinical cases investigated in this study, 10.63% of them presented pleurisy lesions. When investigating the pleurisy frequency among the states or regions, we have observed that the state of Santa Catarina had the higher prevalence of pleurisy with 35.06% of cases, followed by the state of Minas Gerais with 35.31%, Rio Grande do Sul with 17.22% Paraná with 9.75% and the Midwest region had the lower prevalence with 6.02% of cases. Out of the total isolates, HPS were isolated in 55.0% of the total; P. multocida 31.0%; S. suis 7.0%; APP 6.0% and BB 1.0%.[...]


Assuntos
Animais , Bactérias/isolamento & purificação , Bactérias/patogenicidade , Pleurisia/diagnóstico , Pleurisia/microbiologia , Pleurisia/veterinária , Suínos/crescimento & desenvolvimento , Suínos/microbiologia , Brasil , Estudos Transversais
7.
Acta sci. vet. (Online) ; 46: Pub. 1590, 2018. tab, graf
Artigo em Português | VETINDEX | ID: vti-18036

Resumo

Background: Pleurisy is defined as an inflammation of the pleural membranes, usually caused by bacterial infections. It is considered the second most common reason for condemnations of swine carcass during slaughter. Prior to slaughter, pleurisy can causes discomfort to the animals, and during the slaughter, the carcass from affected animals, has to be trimmed, reducing the value to both the farmer and the plant, increasing the costs of disposal, and line speeds are reduced, increasing processing costs. The objective of this study was to verify the prevalence and to identify the bacterial agents associated with pleurisy lesions in pigs.Materials, Methods & Results: In this study, were used tissue samples from 4,536 piglets collected from the main swine producing regions of Brazil between the years 2013/2014. Samples were collected from animals that presented respiratory, enteric or nervous symptoms. Samples were sent to pathology and bacteriology examinations in a commercial laboratory. The pathogen isolates were classified according to the agent Pasteurella multocida (P. multocida), Haemophilus parasuis (HPS), Streptococcus suis (S. Suis), Actinobacillus pleuropneumoniae (APP) and Bordetella bronchiseptica (BB) stage of development and regional location of the case. Data were analyzed based on the frequency according to the age group using Fisher-test. Of the total number of animals with clinical cases investigated in this study, 10.63% of them presented pleurisy lesions. When investigating the pleurisy frequency among the states or regions, we have observed that the state of Santa Catarina had the higher prevalence of pleurisy with 35.06% of cases, followed by the state of Minas Gerais with 35.31%, Rio Grande do Sul with 17.22% Paraná with 9.75% and the Midwest region had the lower prevalence with 6.02% of cases. Out of the total isolates, HPS were isolated in 55.0% of the total; P. multocida 31.0%; S. suis 7.0%; APP 6.0% and BB 1.0%.[...](AU)


Assuntos
Animais , Suínos/crescimento & desenvolvimento , Suínos/microbiologia , Pleurisia/diagnóstico , Pleurisia/veterinária , Pleurisia/microbiologia , Bactérias/isolamento & purificação , Bactérias/patogenicidade , Estudos Transversais , Brasil
8.
Acta sci. vet. (Impr.) ; 44(supl): 01-05, 2016. ilus, tab
Artigo em Português | VETINDEX | ID: biblio-1457516

Resumo

Background: Osteosarcoma is a malignant mesenchymal tumor with a wide variety of histological patterns. It is the primary bone neoplasia diagnosed in most domestic animal clinic, but rare in farm animals. The tumor develops both the appendicular skeleton as the axial skeleton, the latter being less affected. Generally it has a fast, painful and infiltrative grow, being observed metastasis. This study aims to report a case of metastatic osteoblastic osteosarcoma in the nasal bone of a bovine, diagnosed at the Animal Pathology Laboratory at the University of Passo Fundo (UPF), featuring its pathological and immunohistochemical aspects. Case: A 5 year old Wagyu female beef cattle, was treated at the Veterinary Hospital of the University of Passo Fundo. The animal had swelling in the left nasal plan, dyspnoea and anorexia. It was held cytology and biopsy which revealed malignant mesenchymal neoplasm compatible with osteosarcoma. The clinical picture has worsened and the animal died. At necropsy, the left nasal plane, had ulcerated tumor mass measuring 15x12.5x7.5 cm, hard and firm consistency with whitish color that seeped up to the turbinates and sinuses. In the lung, there were numerous nodules of tumor appearance, adhered to the parietal pleura, similar to bone tissue. In the histopathological analysis, proliferation of neoplastic cells located in the deep dermis was observed [...]


Assuntos
Animais , Bovinos , Neoplasias Nasais/veterinária , Osteossarcoma/diagnóstico , Osteossarcoma/veterinária , Imuno-Histoquímica/veterinária , Metástase Neoplásica , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/veterinária
9.
Acta sci. vet. (Online) ; 44(supl): 01-05, 2016. ilus, tab
Artigo em Português | VETINDEX | ID: vti-14982

Resumo

Background: Osteosarcoma is a malignant mesenchymal tumor with a wide variety of histological patterns. It is the primary bone neoplasia diagnosed in most domestic animal clinic, but rare in farm animals. The tumor develops both the appendicular skeleton as the axial skeleton, the latter being less affected. Generally it has a fast, painful and infiltrative grow, being observed metastasis. This study aims to report a case of metastatic osteoblastic osteosarcoma in the nasal bone of a bovine, diagnosed at the Animal Pathology Laboratory at the University of Passo Fundo (UPF), featuring its pathological and immunohistochemical aspects. Case: A 5 year old Wagyu female beef cattle, was treated at the Veterinary Hospital of the University of Passo Fundo. The animal had swelling in the left nasal plan, dyspnoea and anorexia. It was held cytology and biopsy which revealed malignant mesenchymal neoplasm compatible with osteosarcoma. The clinical picture has worsened and the animal died. At necropsy, the left nasal plane, had ulcerated tumor mass measuring 15x12.5x7.5 cm, hard and firm consistency with whitish color that seeped up to the turbinates and sinuses. In the lung, there were numerous nodules of tumor appearance, adhered to the parietal pleura, similar to bone tissue. In the histopathological analysis, proliferation of neoplastic cells located in the deep dermis was observed [...](AU)


Assuntos
Animais , Bovinos , Osteossarcoma/veterinária , Osteossarcoma/diagnóstico , Neoplasias Nasais/veterinária , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/veterinária , Metástase Neoplásica , Imuno-Histoquímica/veterinária
10.
Ciênc. anim. bras. (Impr.) ; 11(3): 477-481, 2010.
Artigo em Inglês, Português | VETINDEX | ID: biblio-1473007

Resumo

Progestágenos para a sincronização de estro têm sido utilizados como rotina em propriedades com melhor controle reprodutivo. A produção de radicais livres, estresse oxidativo, está relacionada com os níveis de progesterona circulante. O estresse oxidativo é responsável pela agressão à membrana celular, causando lise e a formação de lipoperóxidos. Neste trabalho, buscou-se avaliar o efeito compensatório de antioxidantes (vitaminas C e E) associados ao implante de progesterona exógena (P4), utilizada em protocolos de sincronização de estro em fêmeas bovinas. Vinte e cinco fêmeas bovinas foram divididas aleatoriamente em cinco grupos: 1) controle sem implante de P4; 2) implante de P4; 3) implante de P4 + vitamina C e E; 4) implante de P4 + vitamina E; 5) implante de P4 + vitamina C. Avaliaram-se a lipoperoxidação lipídica, através da mensuração de substâncias reativas ao ácido tiobarbitúrico (TBA-RS), e a enzima glutationa peroxidase (GSHpx), nos dias zero e sete do protocolo de sincronização de estro. A utilização de vitamina E, neste experimento, apresentou uma maior taxa de prenhez; entretanto, existe a necessidade de validar esses resultados, antes que seu uso seja preconizado em fêmeas bovinas sincronizadas com P4.


Estrus synchronization with progesterone is commonly used in farms with better reproductive control. Free radicals production, i.e. oxidative stress, is associated with progesterone levels. The oxidative stress is responsible for aggression to the cellular membrane, leading to a lise and lipoperoxide formation. In this work, the antioxidant compensatory effect (Vitamins C and E) associated with the exogenous progesterone implant (P4), used in estrus synchronization protocols in cattle, was evaluated. Twenty-five cows were randomly selected in 5 different groups: 1) control without P4, 2) control with P4, 3) P4 + vitamin C and E, 4) P4 + vitamin E, 5) P4 + vitamin C. The lipid lipoperoxidation was measured trough Thiobarbituric acid reactive substances (TBA-RS) and Glutatione Peroxidase enzyme (GSHpx) at days 0 and 7 of the estrus synchronization protocol. The use of vitamin E, in this experiment, showed a better pregnancy rate, however, the results must be validated before orienting the use of the vitamin in cows synchronized with P4.


Assuntos
Bovinos , Antioxidantes/farmacologia , Bovinos/classificação , Reprodução , Progesterona/administração & dosagem
11.
Ciênc. anim. bras. (Impr.) ; 11(3): 477-481, 2010.
Artigo em Inglês, Português | VETINDEX | ID: vti-4073

Resumo

Progestágenos para a sincronização de estro têm sido utilizados como rotina em propriedades com melhor controle reprodutivo. A produção de radicais livres, estresse oxidativo, está relacionada com os níveis de progesterona circulante. O estresse oxidativo é responsável pela agressão à membrana celular, causando lise e a formação de lipoperóxidos. Neste trabalho, buscou-se avaliar o efeito compensatório de antioxidantes (vitaminas C e E) associados ao implante de progesterona exógena (P4), utilizada em protocolos de sincronização de estro em fêmeas bovinas. Vinte e cinco fêmeas bovinas foram divididas aleatoriamente em cinco grupos: 1) controle sem implante de P4; 2) implante de P4; 3) implante de P4 + vitamina C e E; 4) implante de P4 + vitamina E; 5) implante de P4 + vitamina C. Avaliaram-se a lipoperoxidação lipídica, através da mensuração de substâncias reativas ao ácido tiobarbitúrico (TBA-RS), e a enzima glutationa peroxidase (GSHpx), nos dias zero e sete do protocolo de sincronização de estro. A utilização de vitamina E, neste experimento, apresentou uma maior taxa de prenhez; entretanto, existe a necessidade de validar esses resultados, antes que seu uso seja preconizado em fêmeas bovinas sincronizadas com P4.(AU)


Estrus synchronization with progesterone is commonly used in farms with better reproductive control. Free radicals production, i.e. oxidative stress, is associated with progesterone levels. The oxidative stress is responsible for aggression to the cellular membrane, leading to a lise and lipoperoxide formation. In this work, the antioxidant compensatory effect (Vitamins C and E) associated with the exogenous progesterone implant (P4), used in estrus synchronization protocols in cattle, was evaluated. Twenty-five cows were randomly selected in 5 different groups: 1) control without P4, 2) control with P4, 3) P4 + vitamin C and E, 4) P4 + vitamin E, 5) P4 + vitamin C. The lipid lipoperoxidation was measured trough Thiobarbituric acid reactive substances (TBA-RS) and Glutatione Peroxidase enzyme (GSHpx) at days 0 and 7 of the estrus synchronization protocol. The use of vitamin E, in this experiment, showed a better pregnancy rate, however, the results must be validated before orienting the use of the vitamin in cows synchronized with P4.(AU)


Assuntos
Bovinos , Antioxidantes/farmacologia , Reprodução , Bovinos/classificação , Progesterona/administração & dosagem
12.
Semina ciênc. agrar ; 41(2): 703-710, 2020. tab
Artigo em Inglês | VETINDEX | ID: biblio-1501760

Resumo

Neospora caninum is a widely distributed parasite, which significantly impacts reproduction in ruminants. This study aimed to survey the seroprevalence and risk factors associated with neosporosis infection in commercial herds of sheep in the northwest of Rio Grande do Sul, Brazil. Three hundred sheep serum samples were used to investigate anti-N. caninum antibodies using indirect immunofluorescence reaction at a 1:40 dilution. The presence of anti-N. caninum antibodies was detected in 20.3% (61/300) of the samples evaluated; however, positive reactions were observed in all (13/13) flocks sampled. Sheep breeds > 1 year of age had 1.2-fold higher risk for infection with N. caninum (odds ratio 2.2 [95% confidence interval 1-5.1]; P < 0.001). These findings should raise awareness on the importance of serological screening, identification of risk factors, and maintenance of preventive measures, such as not allowing dogs to contact sheep feed and not offering the placental remains of ruminants to canids.


Neospora caninum é um parasita amplamente distribuído e de grande importância para a reprodução de ruminantes. O objetivo deste estudo foi realizar um levantamento da soroprevalência e dos fatores de risco associados à neosporose em rebanhos comerciais de ovinos no noroeste do Rio Grande do Sul. Foram utilizadas 300 amostras de soro de ovelhas para investigar anti-N. caninum por Reação de Imunofluorescência Indireta (IFAT) com uma diluição de 1:40. A presença de anticorpos anti-N. caninum foi detectada em 20.3 % (61/300) das amostras avaliadas. Reações positivas foram observadas em todos (13/13) os rebanhos amostrados. Ovinos com mais de um ano tiveram 1.2 mais chances de serem infectados por N. caninum (odds ratio 2.2, intervalo de confiança 1-5.1) (P < 0.001). Com esses dados, chamamos atenção para a importância da triagem sorológica, identificação de fatores de risco e manutenção de medidas de prevalência, como não permitir que os cães entrem em contato com a alimentação das ovelhas e não oferecer os restos placentários dos ruminantes aos canídeos.


Assuntos
Animais , Doenças dos Ovinos/epidemiologia , Doenças dos Ovinos/imunologia , Estudos Soroepidemiológicos , Neospora/parasitologia , Neospora/patogenicidade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA