This study was carried out in a slaughterhouse of Central Department, City of Asuncion, in order to determine the prevalence and the economic losses caused by the presence of Fasciola hepatica in bovine livers. For this purpose, bovine livers were sampled without distinction of race, sex, age, coming from different areas of the country during the month of April. The number of livers inspected was 4179 of the bovine species, of which 24 livers tested positive for Fasciola hepatica, representing 0.6% of prevalence, most positive cases came from the Department of Misiones. The recorded economic losses amount of 174 dollars, with an average weight of 5.5 kilograms, on the total bovine livers examined positive
RESUMEN. El objetivo de la investigación fue evaluar la seroprevalencia de Neospora caninum en ganado bovino de carne de las categorías, vacas, vaquillas y toros de 3 establecimientos ganaderos del Departamento de Concepción, previo al servicio de primavera del año 2020. Se seleccionaron al azar 100 animales en total, entre los 3 establecimientos (45 vacas del establecimiento 1, 45 vaquillas del establecimiento 2 y 10 toros del establecimiento 3). Se extrajo muestras de sangre de la vena yugular las cuales se depositaron en tubos colectores tapa roja sin anticoagulante (EDTA), identificados, refrigerados a 4°C y remitidos a un laboratorio privado donde fueron analizados por el método de ELISA de competición para el diagnóstico, encontrándose los siguientes resultados: el 15% (15 muestras) del total resultaron positivas, y un 85% de muestras negativas. La distribución de los animales positivos según categoría y establecimiento fue: 8% (8 muestras) de categoría vacas secas correspondientes al establecimiento 1, un 6% (6 muestras) de la categoría vaquillas, dieron positivo en el establecimiento 2; y 1% (1 muestra) categoría toros dieron positivo en el establecimiento 3, teniendo en cuenta para los cálculos el total de muestreados.
The purpose of this study is to evaluate the effect of a low consumption protein-energy supplement that incorporates 15% of coconut pulp expeller in bovine animals. These pasture fattening cattle were checked on daily weight gain, supplement consumption and efficiency of pasture use. This study was carried out in a livestock establishment in the Department of Concepción, Paraguay. A total of 108 animals were selected; castrated male bovines, 342 ± 30.2 of body weight (BW), age average 28 months, Nelore breed distributed in 2 treatments (T1 and T2): T1 = 42 animals; control group (pasture + conventional mineral salt) and T2 = 66 animals; treatment group with a protein-energy supplement (pasture + protein-energy supplement with minerals). In both treatments, the animals grazed on pasture of Brachiaria brizantha cv. Marandú and Panincum maximaun cv. Tanzania used a system of pasture rotation of 1 -3 days of occupation and 35 -40 days of rest. The average daily weight gain (DG) was 0.82 and 0.83 kg/day (p > 0.05), the supplement consumption was 0.1 and 0.28 kg/day per animal and the % disappearance of the biomass of 18 and 23% for T1 and T2, respectively. In conclusion, there was no evident effect on DG of protein-energy supplementation.
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