Model figure. (A) C. difficile toxins target the intestinal epithelium and cause severe pathology and gastrointestinal disease leading to morbidity and mortality. (B) When vaccinated mice are infected with C. difficile, anti-toxin IgG and IgA protect mice from disease and inclusion of PPEP-1 and CdeM as immunogens improves decolonization of toxigenic C. difficile from the…