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1.
Theriogenology ; 195: 24-30, 2023 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-36274393

RESUMEN

This study compared the reproductive performance of embryo recipients treated with a timed embryo transfer (TET) protocol using human chorionic gonadotropin (hCG) or equine chorionic gonadotropin (eCG). On a random day of the estrous cycle (Day -10) indicus-taurus recipients (n = 341; 194 nulliparous and 147 multiparous cows) with a body condition score between 3.0 and 4.0, were submitted to the TET protocol consisting of an intramuscular (i.m.) injection of 2.0 mg estradiol benzoate (EB) and the insertion of intravaginal progesterone (P4) device that remained until Day -2.5. On the same day (-2.5), the recipients received i.m. 150 mg D-cloprostenol and 1 mg estradiol cypionate and were randomly divided into two groups: the eCG group (n = 179), in which females received i.m. 300 IU eCG and the hCG group (n = 162), in which females received 150 IU hCG. Then, estrus intensity and the diameter of the dominant follicle (DF) were monitored on D0 and the quality of the corpus luteum (CL) (B mode and color Doppler) was assessed on D7 to select recipients eligible for receiving the transfer of an embryo produced in vitro. Pregnancy diagnosis was assessed 23 days after the transfer. Continuous data were analyzed by ANOVA using a mixed-effects model and Tukey's test. The rates were analyzed using a logistic regression model. The diameter of the DF on day 0 of the TET protocol was influenced by the interaction between gonadotropic treatment and category (P = 0.01), and nulliparous recipients treated with hCG had the smallest diameter. Treatment with hCG and eCG resulted in a high rate of estrus expression; however, the proportion of females with a high-intensity of estrus was higher in the hCG group (79.84 vs. 68.61%, respectively; P = 0.03). The utilization rate (recipients with CL) showed a tendency (P = 0.06) to be influenced by the interaction between gonadotropic treatment and category, wherein nulliparous recipients treated with hCG exhibited a lower utilization rate than the other groups. The diameter, perimeter, and area of the CL were similar (P > 0.1) in all groups. However, the hCG group resulted in CL with a better Doppler evaluation score (P = 0.04), central blood flow (P = 0.03), and tendency towards greater peripheral blood flow (P = 0.08). The rates of conception (32.00% hCG vs. 35.10% eCG; P = 0.46) and pregnancy (24.69% hCG vs. 29.61% eCG; P = 0.20) were similar between the hCG and eCG groups. However, an interaction between the gonadotropic treatment and category revealed lower conception (P = 0.01) and pregnancy rates (P = 0.001) in nulliparous recipients treated with hCG. Treatment with hCG resulted in a greater intensity of estrus expression and CL with a higher Doppler score, which determined rates of utilization, conception, and pregnancy similar to conventional protocols using eCG. However, nulliparous recipients treated with hCG exhibited a lower overall reproductive rate.


Asunto(s)
Gonadotropina Coriónica , Transferencia de Embrión , Embarazo , Humanos , Femenino , Bovinos , Caballos , Animales , Gonadotropina Coriónica/farmacología , Transferencia de Embrión/veterinaria , Gonadotropinas Equinas/farmacología , Progesterona , Cuerpo Lúteo , Estradiol/farmacología , Inseminación Artificial/veterinaria , Inseminación Artificial/métodos , Sincronización del Estro/métodos , Ensayos Clínicos Veterinarios como Asunto
2.
Rev Bras Parasitol Vet ; 29(4): e003620, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33053053

RESUMEN

The aim of this study was to determine the occurrence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies and their associated factors among goats in farms from the Paraná state, South Brazil. The serological analysis was performed by indirect ELISA on 629 goat serum samples collected from 32 farms distributed in five mesorregions from the state. Seropositivity was observed in 30.7% of the animals for T. gondii, 6.3% for N. caninum, and 3.0% for both agents. Final multiple regression models showed that the use of assisted reproduction decreased the chance of seropositivity for T. gondii (PR=0.70) and the slaughtering site on the farm (PR=2.03) increased it. To N. caninum, the supplying concentrated feed to animals (OR=4.80) and animal pre-weaning death (OR=9.96) increased the chance of seropositivity. The variables associated with these seropositivities suggest deficiencies in sanitation and reproductive management. In addition, it recognizes critical points of infection for animal production management.


Asunto(s)
Anticuerpos Antiprotozoarios/sangre , Coccidiosis , Cabras/parasitología , Toxoplasmosis Animal , Animales , Brasil/epidemiología , Coccidiosis/diagnóstico , Coccidiosis/epidemiología , Coccidiosis/veterinaria , Neospora/inmunología , Estudios Seroepidemiológicos , Toxoplasma/inmunología , Toxoplasmosis Animal/diagnóstico , Toxoplasmosis Animal/epidemiología
3.
R. bras. Parasitol. Vet. ; 29(4): e003620, out. 2020. tab
Artículo en Inglés | VETINDEX | ID: vti-29804

RESUMEN

The aim of this study was to determine the occurrence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies and their associated factors among goats in farms from the Paraná state, South Brazil. The serological analysis was performed by indirect ELISA on 629 goat serum samples collected from 32 farms distributed in five mesorregions from the state. Seropositivity was observed in 30.7% of the animals for T. gondii, 6.3% for N. caninum, and 3.0% for both agents. Final multiple regression models showed that the use of assisted reproduction decreased the chance of seropositivity for T. gondii (PR=0.70) and the slaughtering site on the farm (PR=2.03) increased it. To N. caninum, the supplying concentrated feed to animals (OR=4.80) and animal pre-weaning death (OR=9.96) increased the chance of seropositivity. The variables associated with these seropositivities suggest deficiencies in sanitation and reproductive management. In addition, it recognizes critical points of infection for animal production management.(AU)


O objetivo desse estudo foi avaliar a ocorrência de anticorpos anti-Toxoplasma gondii e anti-Neospora caninum e seus fatores associados em caprinos de propriedades do Estado do Paraná, Sul do Brasil. A análise sorológica foi realizada, utilizando-se ELISA indireto em 629 amostras de soro caprino, coletadas em 32 propriedades distribuídas em cinco mesorregiões do Estado. A soropositividade foi observada em 30,7% dos animais para T. gondii, 6,3% para N. caninum e 3,0% para ambos. Os modelos finais de regressão múltipla mostraram que o uso de reprodução assistida reduziu a chance de soropositividade para T. gondii (PR=0,70), enquanto a presença no local de abate na fazenda (PR=2,03) aumentou. Para N. caninum, o fornecimento de ração concentrada (OR=4,80) e a morte dos animais no pré-desmame (OR=9,96) aumentaram a chance de soropositividade. O estudo das variáveis associadas às soropositividades sugere deficiências no saneamento e no manejo reprodutivo dos Animais. Além disso, reconhece pontos críticos para a infecção no manejo da produção animal.(AU)


Asunto(s)
Animales , Rumiantes/microbiología , Rumiantes/inmunología , Toxoplasmosis Animal/inmunología , Neospora/inmunología , Estudios Seroepidemiológicos , Ensayo de Inmunoadsorción Enzimática/veterinaria
4.
Rev. bras. parasitol. vet ; 29(4): e003620, 2020. tab
Artículo en Inglés | LILACS | ID: biblio-1138142

RESUMEN

Abstract The aim of this study was to determine the occurrence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies and their associated factors among goats in farms from the Paraná state, South Brazil. The serological analysis was performed by indirect ELISA on 629 goat serum samples collected from 32 farms distributed in five mesorregions from the state. Seropositivity was observed in 30.7% of the animals for T. gondii, 6.3% for N. caninum, and 3.0% for both agents. Final multiple regression models showed that the use of assisted reproduction decreased the chance of seropositivity for T. gondii (PR=0.70) and the slaughtering site on the farm (PR=2.03) increased it. To N. caninum, the supplying concentrated feed to animals (OR=4.80) and animal pre-weaning death (OR=9.96) increased the chance of seropositivity. The variables associated with these seropositivities suggest deficiencies in sanitation and reproductive management. In addition, it recognizes critical points of infection for animal production management.


Resumo O objetivo desse estudo foi avaliar a ocorrência de anticorpos anti-Toxoplasma gondii e anti-Neospora caninum e seus fatores associados em caprinos de propriedades do Estado do Paraná, Sul do Brasil. A análise sorológica foi realizada, utilizando-se ELISA indireto em 629 amostras de soro caprino, coletadas em 32 propriedades distribuídas em cinco mesorregiões do Estado. A soropositividade foi observada em 30,7% dos animais para T. gondii, 6,3% para N. caninum e 3,0% para ambos. Os modelos finais de regressão múltipla mostraram que o uso de reprodução assistida reduziu a chance de soropositividade para T. gondii (PR=0,70), enquanto a presença no local de abate na fazenda (PR=2,03) aumentou. Para N. caninum, o fornecimento de ração concentrada (OR=4,80) e a morte dos animais no pré-desmame (OR=9,96) aumentaram a chance de soropositividade. O estudo das variáveis associadas às soropositividades sugere deficiências no saneamento e no manejo reprodutivo dos Animais. Além disso, reconhece pontos críticos para a infecção no manejo da produção animal.


Asunto(s)
Animales , Cabras/parasitología , Anticuerpos Antiprotozoarios/sangre , Toxoplasmosis Animal/diagnóstico , Coccidiosis/diagnóstico , Coccidiosis/veterinaria , Coccidiosis/epidemiología , Toxoplasma/inmunología , Brasil/epidemiología , Estudios Seroepidemiológicos , Toxoplasmosis Animal/epidemiología , Neospora/inmunología
5.
Rev. bras. reprod. anim ; 43(4): 809-814, out.-dez. 2019. ilus, tab
Artículo en Portugués | VETINDEX | ID: biblio-1492600

RESUMEN

Objetivou-se com o presente estudo determinar a ocorrência de alterações das glândulas sexuais acessórias de touros de rodeio através da ultrassonografia transretal. Touros mestiços (n = 118) foramavaliados através da palpação e ultrassonografia transretal. As glândulas sexuais acessórias (próstata, ampolas dos ductos deferentes e vesículas seminais) foram palpadas e delimitadas quanto ao tamanho e higidez. Após, tais glândulas foram avaliadas e mensuradas de ponta a ponta com ultrassom (Sonoscape®, China), probe linear, modo-B, com frequência de 7,5 Hz, por via transretal. A ocorrência de alterações das vesículas seminais direita e esquerda foi de 44,91 %. A assimetria vesicular leve obteve a prevalência de 47,17 %, a moderada de 5,66 % e grave cerca de 47,17 %. A medida média da ampola foi de 9 mm. A ocorrência de alterações das ampolas direita e esquerda foi de 6,78 %, nos quais as alterações na próstata foi de 17,8 %. Assim, cerca de 10,17 % dos touros apresentaram redução da sensibilidade da próstata e no que diz respeito a ausência de sensibilidade dessa glândula, cerca de 7,63%. Conclui-se que o exame ultrassonográfico pode auxiliar em melhor acuidade no exame das glândulas sexuais acessórias em touros de rodeio.


The objective of this study was to determine the occurrence of alterations of the rodeo bull accessory sex glands by transrectal ultrasound. Crossbred bulls (n = 118) were evaluated by palpation and transrectal ultrasound. The accessory sex glands (prostate, ampoules and seminal vesicles) were palpated and delimited for size and higidity. Afterwards, these glands were scanned and measured from end to end with ultrasound (Sonoscape®, China), linear probe, B-mode, with frequency of 7.5 Hz, transrectally. The occurrence of right and left seminal vesicle alterations was 44.91%. Mild vesicularasymmetry was prevalent at 47.17%, moderate at 5.66% and severe at 47.17%. The mean ampoule measurement was 9 mm. Changes in right and left ampoules were 6.78%, in which prostate changes were 17.8%. Besides, about 10.17% of bulls had reduced prostate sensitivity and about 7.63% lack of sensitivity of this gland. It is concluded that the ultrasound examination may help in better accuracy in the examination of the accessory sex glands in rodeo bulls.


Asunto(s)
Masculino , Animales , Bovinos , Bovinos/embriología , Bovinos/fisiología , Vesículas Seminales , Próstata , Ultrasonografía/veterinaria
6.
R. bras. Reprod. Anim. ; 43(4): 809-814, out.-dez. 2019. ilus, tab
Artículo en Portugués | VETINDEX | ID: vti-24424

RESUMEN

Objetivou-se com o presente estudo determinar a ocorrência de alterações das glândulas sexuais acessórias de touros de rodeio através da ultrassonografia transretal. Touros mestiços (n = 118) foramavaliados através da palpação e ultrassonografia transretal. As glândulas sexuais acessórias (próstata, ampolas dos ductos deferentes e vesículas seminais) foram palpadas e delimitadas quanto ao tamanho e higidez. Após, tais glândulas foram avaliadas e mensuradas de ponta a ponta com ultrassom (Sonoscape®, China), probe linear, modo-B, com frequência de 7,5 Hz, por via transretal. A ocorrência de alterações das vesículas seminais direita e esquerda foi de 44,91 %. A assimetria vesicular leve obteve a prevalência de 47,17 %, a moderada de 5,66 % e grave cerca de 47,17 %. A medida média da ampola foi de 9 mm. A ocorrência de alterações das ampolas direita e esquerda foi de 6,78 %, nos quais as alterações na próstata foi de 17,8 %. Assim, cerca de 10,17 % dos touros apresentaram redução da sensibilidade da próstata e no que diz respeito a ausência de sensibilidade dessa glândula, cerca de 7,63%. Conclui-se que o exame ultrassonográfico pode auxiliar em melhor acuidade no exame das glândulas sexuais acessórias em touros de rodeio.(AU)


The objective of this study was to determine the occurrence of alterations of the rodeo bull accessory sex glands by transrectal ultrasound. Crossbred bulls (n = 118) were evaluated by palpation and transrectal ultrasound. The accessory sex glands (prostate, ampoules and seminal vesicles) were palpated and delimited for size and higidity. Afterwards, these glands were scanned and measured from end to end with ultrasound (Sonoscape®, China), linear probe, B-mode, with frequency of 7.5 Hz, transrectally. The occurrence of right and left seminal vesicle alterations was 44.91%. Mild vesicularasymmetry was prevalent at 47.17%, moderate at 5.66% and severe at 47.17%. The mean ampoule measurement was 9 mm. Changes in right and left ampoules were 6.78%, in which prostate changes were 17.8%. Besides, about 10.17% of bulls had reduced prostate sensitivity and about 7.63% lack of sensitivity of this gland. It is concluded that the ultrasound examination may help in better accuracy in the examination of the accessory sex glands in rodeo bulls.(AU)


Asunto(s)
Animales , Masculino , Bovinos , Bovinos/embriología , Bovinos/fisiología , Ultrasonografía/veterinaria , Vesículas Seminales , Próstata
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