This study aimed to discuss the results of a rostrotentorial decompressive craniotomy performed in a ram with had severe neurological signs. The patient had a clinical picture of right paresis product of a left hemisphere syndrome. A computerized axial tomography (CAT) was conducted and a tumour was found in the left cerebral hemisphere. In order to extend the productive life of the animal, given his value as a sire, a decompressive craniotomy was performed. Part of the cranial vault was dissected to provide more space to the brain and relieve intracranial hypertension caused by this pathology. Once recovered from anaesthesia, the animal presented a remission of neurological signs. The patient did not present the previous compulsive circling behaviour, ataxia and head-pressing behaviour. The patient remained under observation for a period of 20 days, during which he presented good temper...

This study aimed to determine the service rate (TS) in intensive dairy farms in Lima, Peru and to identify the factors affecting it. For this purpose, 144 experimental units (farm-month units) were used. Each unit consisted of 60 randomly selected cows who had more than 60 days in lactation during the study month and their conception date should be after the start date of the study month. Records of four dairy farms in the provinces of Huaura, Huaral, Lima and Cañete in the period of August 2010 to July 2013 were assessed. The effect of days in milk (DEL), production level (NPX), parity (NP), the percentage of inseminated cows by using prostaglandins (%PG), percentage of inseminated cows under fixed-time artificial insemination (%TAI) and maximum temperature-humidity index (THI Max) on service rate were evaluated. Moreover, farm, year, season and milking frequency were evaluated. TS was...

The aim of this work was to evaluate the efficacy of pasteurization and freezing on the inactivation of the bovine leukosis virus present in milk. A bioassay was carried out using 16 sheep. The animals received an intraperitoneal leukocytes inoculum from cow milk with cells infected with bovine leukosis virus (BVL) previously treated with one of the virus inactivation methods. Four study groups were evaluated: a) control group: milk without prior treatment, b) pasteurization group: milk treated by pasteurization, c) 12-hour freezing group: milk treated by freezing for 12 hours, d) 36-hour freezing group: milk treated by freezing for 36 hours. In the week 10 of the inoculation, all animals (4/4) in the control group and 3/4 of the animals in the 12 h freezing group were seropositive for VLB, while no animal was seropositive (0/4) for VLB in the pasteurization and 36-hour freezing groups. ...

This study aimed to discuss the results of a rostrotentorial decompressive craniotomy performed in a ram with had severe neurological signs. The patient had a clinical picture of right paresis product of a left hemisphere syndrome. A computerized axial tomography (CAT) was conducted and a tumour was found in the left cerebral hemisphere. In order to extend the productive life of the animal, given his value as a sire, a decompressive craniotomy was performed. Part of the cranial vault was dissected to provide more space to the brain and relieve intracranial hypertension caused by this pathology. Once recovered from anaesthesia, the animal presented a remission of neurological signs. The patient did not present the previous compulsive circling behaviour, ataxia and head-pressing behaviour. The patient remained under observation for a period of 20 days, during which he presented good temper...

El presente trabajo tuvo como objetivo determinar la tasa de servicio (TS) de establos de lechería intensiva de Lima, Perú, e identificar los factores que la afectan. Se trabajó con 144 unidades experimentales, denominadas establo-mes. Cada una estuvo conformada por 60 vacas seleccionadas al azar, las cuales debían tener más de 60 días en lactación durante el mes de estudio y su fecha de concepción debía ser después de la fecha de inicio del mes de estudio. Se trabajó con los registros de cuatro establos de las provincias de Huaura, Lima y Cañete en el periodo entre agosto de 2010 y julio de 2013. Se evaluó la posible influencia sobre la TS de los días en lactación (DEL), nivel productivo (NPx), número de partos (NP), porcentaje de vacas con uso de prostaglandinas (%PG), porcentaje de vacas bajo un programa de inseminación artificial a tiempo fijo (%IATF) y del índice t...

The aim of this work was to evaluate the efficacy of pasteurization and freezing on the inactivation of the bovine leukosis virus present in milk. A bioassay was carried out using 16 sheep. The animals received an intraperitoneal leukocytes inoculum from cow milk with cells infected with bovine leukosis virus (BVL) previously treated with one of the virus inactivation methods. Four study groups were evaluated: a) control group: milk without prior treatment, b) pasteurization group: milk treated by pasteurization, c) 12-hour freezing group: milk treated by freezing for 12 hours, d) 36-hour freezing group: milk treated by freezing for 36 hours. In the week 10 of the inoculation, all animals (4/4) in the control group and 3/4 of the animals in the 12 h freezing group were seropositive for VLB, while no animal was seropositive (0/4) for VLB in the pasteurization and 36-hour freezing groups. ...

El objetivo del presente trabajo es evaluar la eficacia de la congelación sobre la inactivación del virus de la leucosis bovina presente en leche como estrategia de control en terneros lactantes. Para el estudio se realizó un bioensayo ovino, en el cual se emplearon 12 ovinos. Los ovinos recibieron por vía intraperitoneal un inóculo proveniente de leche con células infectadas por el virus de leucosis bovina (VLB) previamente tratada con uno de los métodos de inactivación del virus. Se evaluaron cuatro grupos de estudio: a) grupo control: leche con células infectadas por el VLB sin ningún tratamiento previo, b) grupo congelación 12 horas: leche con células infectadas por el VLB tratada por congelación durante 12 horas, c) grupo congelación 36 horas: leche con células infectadas por el VLB tratada por congelación durante 36 horas. Se encontró que a la décima semana post i...

El objetivo del estudio fue evaluar el efecto de cuatro combinaciones de dos agentes crioprotectores permeantes más dos no permeantes sobre la calidad del semen ovino post-descongelamiento. Para esto, primero (Experimento 1) se seleccionó, entre tres dilutores (A, B y C), el más adecuado para ser usado en la segunda parte (Experimento 2), en la cual se evaluaron las siguientes combinaciones de agentes crioprotectores permeantes y no permeantes: 1)Glicerol - Trehalosa, 2)Glicerol - Sacarosa, 3)Etilenglicol - Trehalosa y 4)Etilenglicol - Sacarosa sobre la calidad del semen ovino post-descongelamiento. Para tal efecto, se realizaron 6 repeticiones para el Experimento 1 y 8 repeticiones para el Experimento 2. Cada repetición constó de 4 eyaculados cada una. En el experimento 1 se encontró que el Dilutor A mantenía mejor la motilidad progresiva y viabilidad e integridad acrosomal post-...

La baja calidad de la leche es un problema de nuestro sector pecuario, la cual trae como consecuencia castigos en el precio de la leche. El presente trabajo determina si el modelo estructural tridimensional planteado represente a los estilos de gestión empleados para administrar la sala de ordeño y la calidad de la leche en los establos lecheros de la provincia de Lima. El estudio se llevó a cabo en 31 establos. Se recolectaron datos a través de encuestas para evaluar la dimensión personas, tareas y prácticas de manejo del estilo de gestión como variable independiente, así como el análisis de muestras de leche para evaluar la calidad física, composicional, higiénica y sanitaria de la calidad de leche, como variable dependiente. Para esto se realizó un análisis factorial y luego se evaluó el modelo estructural planteado en AMOS IBM. Finalmente se realizó un análisis clúst...

            The aim of the research was to study the association between the presentation of endometritis and serum calcium levels in intensively reared dairy cows from Lima, Peru. The study was carried out with 76 Holstein cows. Blood samples were taken on the seventh day of parturition to measure calcium levels using a spectrophotometer, considering 8 mg/dl as the threshold to determine the presence of subclinical hypocalcemia. The diagnosis of endometritis was made at 35 ± 3 days postpartum using the commercial Metricheck® device to evaluate the appearance of vaginal fundus discharge, considering as endometritis a score greater than or equal to 2 on the McDougall scale. A significant difference was found between multiparous cows with and without hypocalcemia in the presentation of endometritis (p<0.02), showing 1.65 times mor...

            The aim of the research was to study the association between the presentation of endometritis and serum calcium levels in intensively reared dairy cows from Lima, Peru. The study was carried out with 76 Holstein cows. Blood samples were taken on the seventh day of parturition to measure calcium levels using a spectrophotometer, considering 8 mg/dl as the threshold to determine the presence of subclinical hypocalcemia. The diagnosis of endometritis was made at 35 ± 3 days postpartum using the commercial Metricheck® device to evaluate the appearance of vaginal fundus discharge, considering as endometritis a score greater than or equal to 2 on the McDougall scale. A significant difference was found between multiparous cows with and without hypocalcemia in the presentation of endometritis (p<0.02), showing 1.65 times mor...

The aim of this study was to evaluate the reproductive performance of dairy cows with delayed uterine involution under hormonal treatment with estradiol cypionate (CE2) and estradiol benzoate (BE2) between 36 and 49 days after parturition and a group of dairy cows with normal uterine involution. A total of 349 dairy cows with delayed uterine involution and 127 dairy cows without delayed uterine involution from a commercial farm in Lima, Peru were used. The BE2 treatment consisted of the i.m. application of 3 doses of 5 mg at 2-day interval and the CE2 treatment consisted of the i.m. application of 2 doses of 4 mg at 4-day interval. The parameters evaluated were calving-to-conception interval (IPC), services per conception (NSC), conception rate at first service (P1S) and the pregnancy rate at 200 days (P200D). In addition, the likelihood of get pregnant according to the days in lactation...

The aim of this study was to evaluate the reproductive performance of dairy cows with delayed uterine involution under hormonal treatment with estradiol cypionate (CE2) and estradiol benzoate (BE2) between 36 and 49 days after parturition and a group of dairy cows with normal uterine involution. A total of 349 dairy cows with delayed uterine involution and 127 dairy cows without delayed uterine involution from a commercial farm in Lima, Peru were used. The BE2 treatment consisted of the i.m. application of 3 doses of 5 mg at 2-day interval and the CE2 treatment consisted of the i.m. application of 2 doses of 4 mg at 4-day interval. The parameters evaluated were calving-to-conception interval (IPC), services per conception (NSC), conception rate at first service (P1S) and the pregnancy rate at 200 days (P200D). In addition, the likelihood of get pregnant according to the days in lactation...