We investigated the gut microbiome, surrogated by fecal samples, of CF rabbits carrying homozygous 9 base pair (bp) deletions (∆9/∆9) on the CFTR gene (n = 7) and WT rabbits (n = 6) by iTag sequencing of the 16S rRNA gene (Figure 1). Here, CFTR is linked to cystic fibrosis.