**Andrea Piccioni, Federico Rosa, Federica Manca, Giulia Pignataro, Christian Zanza, Gabriele Savioli, et al.**

Gut Microbiota and *Clostridium difficile*: What We Know and the New Frontiers Reprinted from: *Int. J. Mol. Sci.* **2022**, *23*, 13323, doi:10.3390/ijms232113323 ............. **167**
