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Resumen Resumo The main objective in animal farms is to achieve a high birth rate and to maximise productive performance in terms of average daily gains and feed efficiency at less cost. Another objective is to decrease the incidence and the persistence of infections. The use of antibiotics has a double function. As a first function, antibiotics are used with therapeutic purposes, being the medicated feeds the most common mode of administration of the drug. As a second function, antibiotics can be used as feed additives in order to operate as growth promoters. However, there is a growing public concern on the negative effects of the use of antibiotics, especially because of the possibility of resistance development by gut microorganism that can be transferred to humans. Conseguir una tasa de natalidad elevada asi como una mayor rapidez en la capacidad de engorde y en el crecimiento de la produccion animal son actualmente los principales objetivos en las grandes explotaciones. Al mismo tiempo, la ... |
