Strains of the 027 ribotype, which is associated with epidemics of CDI, were used for further analysis: CD196 (NCBI Accession No. FN538970.1), R20291 (FN545816.1), 2007855 (FN665654.1), and BI1 (FN668941.1) [19,64,65]. This evidence concerns the gene CCR6 and clostridium difficile infection.