Abstract
A pre trial will be held in a hatchery a company matrizeira the State of São Paulo, where eggs are inoculated in 180 days with and without probiotic using as diluent vaccine Marek and applied through injection Embrex brand. At birth, will be assessed the weights of chicks, hatchability, mortality. Furthermore, it will be assessed the Biometrics 15 birds / treatment, and of these 5 birds /…