AIMS o Determine how pathways of 5-ht metabolism are affected by the gut microbiota o Identify specific microbial communities and factors involved in conferring serotonergic effects o Evaluate how microbial modulation of peripheral 5-HT impacts host physiologyAIMS  Determine how pathways of 5-HT metabolism are affected by the gut microbiota.  Identify specific microbial communities and factors involved in conferring serotonergic effects.  Evaluate how microbial modulation of peripheral 5-HT impacts host physiology