Several parameters such as feeding practices, composition of animal diets, farm management and productivity constraintsalter the composition and thus the functioning of the gut microflora, making the biological defenses less efficient againstpathogenic agents affecting the health of the animal host. For alleviating this problem, animal feed companies and researchershave been looking for alternative products and strategies that can help to maintain animal gut health in order to prevent orreduce the prevalence of pathogens in the food chain