Schematic representation of the DSS-induced colitis experiment preceded by 3 weeks of oral administration (gavage) of GF WT and GF Card9 -/- mice with the microbiota of WT mice (WT GF WT and Card9 -/- GF WT) or Card9 -/- mice (WT GF Card9 -/- and Card9 -/- GF Card9 -/- ). DSS 2% in drinking water for 7 days and then water for 5 days.
