Population-Based Surveillance of <i>Clostridium difficile</i> Infection in Manitoba, Canada, by Using Interim Surveillance Definitions

Although the majority of CDI cases were associated with exposure to a HCF, 40% of incident CDI began in the community. Populations with HCF- and community-associated CDI demonstrated significantly different age distributions. The wide variation of rates among HCFs requires explanation. The high percentage of incident cases in the community warrants increased study.