Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 9 de 9
Filtrar
Mais filtros

Base de dados
Intervalo de ano de publicação
1.
Anim. Reprod. (Online) ; 19(3): e20220053, set. 2022. tab
Artigo em Inglês | VETINDEX | ID: biblio-1403208

Resumo

The growth, sexual maturity and fertility-related parameters related of young Nellore bulls with divergent residual feed intake (RFI) raised on pasture were evaluated. After classification of 48 young males as low and high RFI (more and less efficient, respectively), the animals were evaluated for growth and reproductive parameters at 28-day intervals from 14.3 to 24.6 months of age. The semen was cryopreserved in the last sampling and fresh and post-thaw semen samples were evaluated. Low RFI bulls exhibited higher initial and final body weight (P < 0.05), but feed intake, body condition score and growth measures evaluated by carcass ultrasound were unaffected by RFI (P > 0.05). The scrotal circumference, sperm concentration, defects, and quality of fresh semen, and ultrasonographic testicular characteristics were unaffected by RFI (P > 0.05). However, velocity parameters such as average path and curvilinear velocities determined by computer-assisted sperm analysis of thawed semen submitted to the rapid thermoresistance test were improved (P < 0.05) in low RFI bulls, but this improvement in quality did not enhance in vitro sperm fertilizing ability. Our results demonstrated significant differences in metabolism and growth performance between bulls of divergent RFI. In addition, there was slight improvement in the semen quality of bulls with low RFI bulls, but this did not enhance in vitro fertilizing ability. Selection of beef bulls for RFI can be performed, which will result in economic benefits by improving the growth performance of the animals without affecting reproductive parameters.(AU)


Assuntos
Animais , Masculino , Maturidade Sexual/fisiologia , Bovinos/fisiologia , Fertilidade/fisiologia , Sêmen , Criopreservação/veterinária , Ingestão de Alimentos
2.
R. bras. Reprod. Anim. ; 40(4): 226-228, Out-Dez. 2016.
Artigo em Português | VETINDEX | ID: vti-24051

Resumo

The aim of this study was to andrologicaly evaluate confined young bulls submitted to a diet rich instarch, correlating andrological traditional data with ultrasonography and testicular histology. 40 bullsconfined for 94 days were submitted to 4 assessments to obtain testicular biometry, ultrasound images andsemen collection and evaluation of the testes after slaughter. There was a progressive increase in weight 341.7 ±15 kg at baseline to 453.6 ± 30 kg at the end of feedlot in 94 days, and testis, with CE of 28.44 ± 3:36 cm to34.68 ± 8.21 cm, VT 677.5 ± 234.7 mm3 to 2663.5 ± 1004 mm3. Ultrasound images showed changes from the56th day. Histological analysis presented alterations from inflammatory findings and testicular degeneration.The study showed that feedlot bulls submitted to high-energy diet rich in starch presented progressive testiculardevelopment and weight, however, it resulted in sonographic, histopathologic and andrological alterations.(AU)


Assuntos
Animais , Masculino , Bovinos , Bovinos/anatomia & histologia , Células Estromais , Andrologia , Ultrassonografia/veterinária
3.
Acta sci. vet. (Online) ; 44: 01-05, 2016. tab
Artigo em Inglês | VETINDEX | ID: vti-722722

Resumo

Background: Ultrasound allows the udder evaluation of lactating cattle, through parameters such as the area of the cistern of the mammary gland and teat, and can reveal structures with different echogenicity, indicating injuries as mastitis, edema, hematoma, abscess, atrophy and fibrosis in the mammary gland parenchyma. The aim of this study was to observe the clinical, morphometric and sonographic assessment of the mammary gland of Jersey cows, evaluating the correlation of this exam and the production of milk. Materials, Methods & Results: Nine Jersey breed cows, aged 3 to 9 years, in a variable order of first to seventh lactation were evaluated. Animals were submitted to general and specific clinical examination of the mammary gland. For the evaluation, inspection and palpation of the gland cistern and teat cistern, measuring with tape measure the udder circumference and width and height of each mammary quarter was held, and length measurements of the four teats individually using a caliper. By palpation the mammary gland parenchyma was classified as nothing worthy of note and fibrosis. After this evaluation, the mammary glands were evaluated using ultrasound, analyzing biometrics and echotexture in order to detect and/or confirm possible changes identified in prior palpation. The diameter of the gland and teat cistern were measured, and the echogenicity of each region a [...](AU)


Assuntos
Animais , Feminino , Bovinos , Glândulas Mamárias Animais/anatomia & histologia , Glândulas Mamárias Animais , Ultrassonografia/veterinária , Mastite Bovina
4.
Acta sci. vet. (Impr.) ; 44: 01-05, 2016. tab
Artigo em Inglês | VETINDEX | ID: biblio-1457453

Resumo

Background: Ultrasound allows the udder evaluation of lactating cattle, through parameters such as the area of the cistern of the mammary gland and teat, and can reveal structures with different echogenicity, indicating injuries as mastitis, edema, hematoma, abscess, atrophy and fibrosis in the mammary gland parenchyma. The aim of this study was to observe the clinical, morphometric and sonographic assessment of the mammary gland of Jersey cows, evaluating the correlation of this exam and the production of milk. Materials, Methods & Results: Nine Jersey breed cows, aged 3 to 9 years, in a variable order of first to seventh lactation were evaluated. Animals were submitted to general and specific clinical examination of the mammary gland. For the evaluation, inspection and palpation of the gland cistern and teat cistern, measuring with tape measure the udder circumference and width and height of each mammary quarter was held, and length measurements of the four teats individually using a caliper. By palpation the mammary gland parenchyma was classified as nothing worthy of note and fibrosis. After this evaluation, the mammary glands were evaluated using ultrasound, analyzing biometrics and echotexture in order to detect and/or confirm possible changes identified in prior palpation. The diameter of the gland and teat cistern were measured, and the echogenicity of each region a [...]


Assuntos
Feminino , Animais , Bovinos , Glândulas Mamárias Animais , Glândulas Mamárias Animais/anatomia & histologia , Mastite Bovina , Ultrassonografia/veterinária
5.
Rev. bras. reprod. anim ; 40(4): 226-228, Out-Dez. 2016.
Artigo em Português | VETINDEX | ID: biblio-1492244

Resumo

The aim of this study was to andrologicaly evaluate confined young bulls submitted to a diet rich instarch, correlating andrological traditional data with ultrasonography and testicular histology. 40 bullsconfined for 94 days were submitted to 4 assessments to obtain testicular biometry, ultrasound images andsemen collection and evaluation of the testes after slaughter. There was a progressive increase in weight 341.7 ±15 kg at baseline to 453.6 ± 30 kg at the end of feedlot in 94 days, and testis, with CE of 28.44 ± 3:36 cm to34.68 ± 8.21 cm, VT 677.5 ± 234.7 mm3 to 2663.5 ± 1004 mm3. Ultrasound images showed changes from the56th day. Histological analysis presented alterations from inflammatory findings and testicular degeneration.The study showed that feedlot bulls submitted to high-energy diet rich in starch presented progressive testiculardevelopment and weight, however, it resulted in sonographic, histopathologic and andrological alterations.


Assuntos
Masculino , Animais , Bovinos , Andrologia , Bovinos/anatomia & histologia , Células Estromais , Ultrassonografia/veterinária
6.
Acta sci. vet. (Online) ; 43(supl): 1-4, , 2015, 2015. ilus
Artigo em Inglês | VETINDEX | ID: vti-819

Resumo

Background: Laparoscopy provides good visualization of horses abdominal cavity, besides providing minimal invasiveness and meticulous manipulation intra-abdominal organs. Laparoscopy is suitable for both diagnosing and treating acute abdomen in horses. The purpose of this study was to report a successful case of laparoscopic-assisted surgery for treating sand impaction in a horse.Case: A 3-year-old horse, weighing 460 kg, was admitted following chronic intermittent episodes of diarrhea and colic. Physical exam revealed mild abdominal pain and liquid/pasty diarrhea. There was negative survey of gastrointestinal helminthes and microbiological analyses. Fecal sedimentation test revealed sand impaction. Surgical approach was opted for both accomplishment of the abdominal exploration and resolution of the impactation. The patient was anesthetized and positioned in dorsal recumbency. Laparoscopy was performed through an 11-mm trocar placed right cranially to the umbilicus. There were no apparent adhesions, bowel inflammation nor visceral displacement. A 15-cm celiotomy was carried out caudally to the umbilicus, under laparoscopic guidance, for initial inspection of the gastrointestinal tract. Incision enlargement was required for exteriorizing the pelvic flexure. Afterwards, enterotomy was carried out for drainage of the impactating content, followed by enterorraphy. The pelvic flex...(AU)


Assuntos
Animais , Laparoscopia/veterinária , Pelve/cirurgia , Areia/efeitos adversos , Cólica/veterinária , Sedimentos , Cavalos , Intestinos/cirurgia , Ferida Cirúrgica/veterinária
7.
Acta sci. vet. (Impr.) ; 43(supl): 1-4, Aug. 14, 2015. ilus
Artigo em Inglês | VETINDEX | ID: biblio-1457389

Resumo

Background: Laparoscopy provides good visualization of horses abdominal cavity, besides providing minimal invasiveness and meticulous manipulation intra-abdominal organs. Laparoscopy is suitable for both diagnosing and treating acute abdomen in horses. The purpose of this study was to report a successful case of laparoscopic-assisted surgery for treating sand impaction in a horse.Case: A 3-year-old horse, weighing 460 kg, was admitted following chronic intermittent episodes of diarrhea and colic. Physical exam revealed mild abdominal pain and liquid/pasty diarrhea. There was negative survey of gastrointestinal helminthes and microbiological analyses. Fecal sedimentation test revealed sand impaction. Surgical approach was opted for both accomplishment of the abdominal exploration and resolution of the impactation. The patient was anesthetized and positioned in dorsal recumbency. Laparoscopy was performed through an 11-mm trocar placed right cranially to the umbilicus. There were no apparent adhesions, bowel inflammation nor visceral displacement. A 15-cm celiotomy was carried out caudally to the umbilicus, under laparoscopic guidance, for initial inspection of the gastrointestinal tract. Incision enlargement was required for exteriorizing the pelvic flexure. Afterwards, enterotomy was carried out for drainage of the impactating content, followed by enterorraphy. The pelvic flex...


Assuntos
Animais , Areia/efeitos adversos , Cavalos , Cólica/veterinária , Laparoscopia/veterinária , Pelve/cirurgia , Sedimentos , Ferida Cirúrgica/veterinária , Intestinos/cirurgia
8.
Acta sci. vet. (Online) ; 43: Pub. 1280, June 9, 2015. tab, graf
Artigo em Inglês | VETINDEX | ID: vti-24312

Resumo

Background: The purpose of this study was to evaluate the effectiveness and possible complications of the laparoscopic ovum pick-up (LOPU) technique and to optimize ovarian stimulation in recently weaned ewe lambs.Materials, Methods & Results: Thirty-six healthy lambs, aging 4-8 weeks, were used in this study and divided into six different groups of six animals. Intravaginal implants of medroxyprogesterone were used for follicular wave induction, and parenteral equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) were administered for ovarian stimulation. Ewes from group GCN did not receive any treatment. In group GCI, the animals received only intravaginal implants. For other groups, ovarian stimulation was carried out as follows: in Group G80U, ewes were treated with a single dose of 80 mg of FSHp; in Group G80M, ewes received 4 administrations of 20 mg FSH, in Group G160U, they were treated with a single dose of 160 mg FSH; and in Group G160M they received 4 administrations of 40 mg FSH). Quantitative and qualitative assessment of retrieved oocytes were carried out after LOPU. In vitro maturation (IVM) of oocytes was also quantitative and qualitatively analyzed. Surgical procedure was divided into 6 stages and overall and stage surgical times were assessed. Post-operative pain and plasma fibrinogen were also assessed. The mean overall surgical time...(AU)


Assuntos
Animais , Feminino , Ovinos , Óvulo , Indução da Ovulação/veterinária , Coleta de Tecidos e Órgãos/métodos , Coleta de Tecidos e Órgãos/veterinária
9.
Acta sci. vet. (Impr.) ; 43: Pub.1280-2015. tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1457325

Resumo

Background: The purpose of this study was to evaluate the effectiveness and possible complications of the laparoscopic ovum pick-up (LOPU) technique and to optimize ovarian stimulation in recently weaned ewe lambs.Materials, Methods & Results: Thirty-six healthy lambs, aging 4-8 weeks, were used in this study and divided into six different groups of six animals. Intravaginal implants of medroxyprogesterone were used for follicular wave induction, and parenteral equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) were administered for ovarian stimulation. Ewes from group GCN did not receive any treatment. In group GCI, the animals received only intravaginal implants. For other groups, ovarian stimulation was carried out as follows: in Group G80U, ewes were treated with a single dose of 80 mg of FSHp; in Group G80M, ewes received 4 administrations of 20 mg FSH, in Group G160U, they were treated with a single dose of 160 mg FSH; and in Group G160M they received 4 administrations of 40 mg FSH). Quantitative and qualitative assessment of retrieved oocytes were carried out after LOPU. In vitro maturation (IVM) of oocytes was also quantitative and qualitatively analyzed. Surgical procedure was divided into 6 stages and overall and stage surgical times were assessed. Post-operative pain and plasma fibrinogen were also assessed. The mean overall surgical time...


Assuntos
Feminino , Animais , Coleta de Tecidos e Órgãos/métodos , Coleta de Tecidos e Órgãos/veterinária , Indução da Ovulação/veterinária , Ovinos , Óvulo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA