<unk>  infection is caused by<unk> , a spore-forming, toxin-producing, obligate anaerobic, gram-positive bacillus.
Clostridium difficile
Salmonella
Salmonella enterica
Salmonella enteritidis
Shigella dysenteriae
Campylobacter jejuni
Yersinia enterocolitica
Salmonella bongori