Figure 1.
Flow diagram for the three-step algorithm to confirm toxigenic Clostridium difficile and the diagnosis of CDI.
Abbreviations: ZCH, Zibo Central Hospital; AHQU, the Affiliated Hospital of Qingdao University; GDH, glutamate dehydrogenase; CDAB, C. difficile toxin A&B; CDI, C. difficile infection.