Resident enteric bacteria are necessary for development of spontaneous colitis and immune system activation in interleukin-10-deficient mice. - Sellon,R.K.; Tonkonogy,S.; Schultz,M.; Dieleman,L.A.; Grenther,W.; Balish,E.; Rennick,D.M.; Sartor,R.B. (Infect Immun, 1998)