Figure 1.

Time line for definitions of Clostridium difficile infection (CDI) for both (a) traditional surveillance and (b) LabID surveillance methods.

Note. This figure is adapted from McDonald et al.⁶ The figure is designed for illustrative purposes and does not include all surveillance definition categories. Case patients with events (symptom onset versus positive laboratory test) occurring during the window of hospitalization marked by an asterisk (*) could be classified as either having community-acquired/community-onset, indeterminate, or community-onset, healthcare-facility-associated disease based on the timing of their previous hospitalization. Note. HO-HCFA, hospital-onset healthcare-facility-associated CDI; CO-HCFA, community-onset healthcare-facility-associated CDI; CA, community-acquired CDI; CO, community-onset CDI.