CD4 and clostridium difficile infection: The composition of pre-FMT fecal samples from patients CD1 to CD4 and 10 additional patients with recurrent CDI was distinct from both fecal samples from healthy individuals and microbial communities at other body sites, including mouth, vagina, and skin, demonstrating severe alterations in pre-FMT communities compared to healthy fecal communities as has been previously shown [4,5].