IL10 and campylobacteriosis: To overcome physiological colonization resistance we applied gnotobiotic mice with a virtually depleted microbiota following broad-spectrum antibiotic treatment and chose the gnotobiotic IL-10-/- mouse model that was recently shown very well suitable to elucidate immunopathological mechanisms of C. jejuni infection mimicking key featues of human campylobacteriosis such as acute enterocolitis within six days p.i. [17, 19, 20].