Efeito do uso de ácidos orgânicos e probióticos no desempenho de frangos de corte desafiados com Salmonella Heidelberg

Abstract

This study aims to evaluate the performance of broiler chickens challenged with Salmonella Heidelberg. Will be used 240 birds of the lineage Ross 808, with one day of age with an average weight of 42g from breeders of 30 weeks of age. The birds will be distributed in 24 boxes of approximately 1.5 square meters each, with a total of 10 birds per pen. Management practices adopted follow the manual management of the lineage. All birds will be challenged by inoculation of 1 ml of a solution containing 1,2x109 UFC (Colony Forming Units) of Salmonella Heidelberg, via esophageal pray in 6 of the accommodation, the treatments are: T1 Control Group: No administration mixtures Probiotic organic acids and T2 Administration organic acid 4L 12 hours before slaughter to 1000L (vol / vol). T3 On the first day of life probiotic half the dose (30 mg per 10 birds) on the 14th day of age a dose of the mixture of organic acids on the 24th day of life probiotic half the dose.Mixture of organic acids for 12 hours before slaughter, T4 On the first day of life, a probiotic dose (60mg 10 birds) on the 14th day of age a dose of the mixture of organic acids. After 24 days a dose of probiotic. Mixture of organic acids for 12 hours before slaughter; T5 On the first day of life probiotic half the dose (30 mg per 10 birds) on the 14th day of life, a dose a dose of the mixture of organic acids on the 15th day half life probiotic dose (30 mg per 10 birds). On the 24th day half the probiotic dose. Mixture of organic acids for 12 hours before slaughter, T6 On the first day of life, a probiotic dose (60 mg per 10 birds) on the 14th day of age a dose of the mixture of organic acids on the 15th day of life plus a dose of probiotics. The addition of probiotics and organic acids did not improve feed intake, feed conversion and broilers weight gain challenged with Salmonella Heidelberg throughout the experiment.