Dynamics of CRISPR-based host bacteria-phage associations before and after FMT. (A) The number of detected CRISPR spacers associated with bacterial classes in pre-FMT (left), post-FMT (middle), and donor (right) samples. (B) Venn diagram showing the overlapping CRISPR spacers in the bacteriomes pre-FMT and post-FMT, and the donor samples. Bar plots showing the number of viral families targeted by CRISPR spacers. (C) Venn diagram showing the CRISPR spacers targeting Microviridae in pre-FMT, post-FMT, and the donor samples. Bar plots showing the number of CRISPR spacers in the bacterial genera.