Dr. Rosshart studied biology and medicine at the Albert-Ludwigs-University Freiburg, Germany. In February 2010 he obtained his doctorate degree in basic immunological research with "summa cum laude" from the University of Freiburg. After his postgraduate training in clinical internal medicine at the University Medical Center Freiburg, he joined the National Institutes of Health in Bethesda, USA for a 6 year postdoctoral fellowship in basic immunological research. During this time he developed the "natural microbiota theory" which he published as corresponding author in the journals Cell (2017) and Science (2019). In July 2019 he took his new position as academic physician scientist, group leader of the translational microbiome research laboratory and head of the gnotobiotic mouse facility at the Department of Medicine II, University Medical Center Freiburg. His work focuses on mammalian microbiota and their impact on health and disease. He utilizes natural microbiota- and pathogen-based mouse models and a bench-to-bedside approach to identify new treatment strategies for human diseases.