**3. Interactions between the Gut Microbial Communities and** *Clostridium difficile* **Infection** *3.1. What We Know*

The relationship between gut microbiota and *Clostridium difficile* infection has been studied from different perspectives (Table 3).

**Table 3.** Summary of some existing interactions between microbiome and the occurrence of *Clostridium difficile* infection.
