Abstract
Abbreviations: CT, cholera toxin; DC, dendritic cell; FnbpA, fibronectin-binding protein A; IFN-γ, gamma interferon; IL-2, interleukin-2; i.m., intramuscularly; i.n., intranasally; LT, heat-labile enterotoxin; s.c., subcutaneously; SLP, surface-layer protein; SLP-36kDa, fragment of the 36kDa SLP; TcdA, toxin A.