Ng BclA1 were shown to have a 2-log higher infectious dose requirement in a mouse model of infection and displayed reduced virulence in a hamster infection model (188). BclA1 is thought to be important in the initial colonization of spores in the gut epithelium of the infected host.Clostridium sporogenes196). Functions ascribed to the exosporium include roles in germination, outgrowth, and attachm