Disclosed are compounds of formula (I), which are of use in the treatment of bacterial diseases and infections, to compositions containing those compounds and to methods of treating bacterial diseases and infections using the compounds. In particular, the compounds are useful for the treatment of infection with, and diseases caused by,
Clostridium difficile
.
Disclosed are pharmaceutical compositions comprising the compound 2,2'-di(pyridin-4-yl)-1H,1'H-5,5'-bibenzo[d]imidazole, or a pharmaceutically acceptable N-oxide, salt, hydrate or solvate thereof, and a pharmaceutically acceptable excipient. The compositions find application in methods of treating infection with Clostridium difficile and in methods of treating Clostridium difficile-associated disease (CDAD).