Moreover he holds an adjunct appointment in the Dept. of Microbiology and Dept. of Microbiology and Physiological Systems at the UMass Medical School. Dr. Sela’s research is focused on the mechanisms by which breast milk molecules direct the population structure, and often function, of microbiota that colonize the infant gastrointestinal tract. Dr. Sela joined UMass Amherst after conducting postdoctoral research with David Mills in the Foods for Health Institute at University of California, Davis and David Relman at Stanford University School of Medicine.