Figure 2. Microbiota rarefaction curves showing fecal microbi-
ota diversity in RCDI (red) and post-FMT (blue) patient and
donor (green) samples. Each curve shows the average number of
OTUs found in a given number of sampled sequences. OTUs can be
treated as equivalent to taxonomic species in the sequence space. RCDI
samples are marked from patient #6a (*), who experienced antibioticinduced
relapse and was treated by FMT again as patient #6b (**).
doi:10.1371/journal.pone.0081330.g002