coccidiosis is still a major disease in broiler production and, economically speaking, it is the most important. Losses are due to mortality and the poor technical performance of the surviving chickens, as well as the cost of the disease's chemical control. Moreover, coccidiosis is one of the most important predisposing factors for bacterial enteritis. This direct effect on enteric health has a repercussion on the prevalence of other enteric or systemic diseases.