Dr Guillermo Tellez Isaias worked at the National Autonomous University of Mexico for 16 years and was previously Head of the Avian Medicine Department at the College of Veterinary Medicine. Currently, Dr Tellez is a Research Professor at the Center of Excellence in Poultry Science, University of Arkansas, USA where his research is focused on the advantages of the poultry gastrointestinal model to evaluate the beneficial effects of functional foods to enhance intestinal health and disease resistance.