The number of OTUs determined to be “high priority”, “medium priority” or “low priority” for full genome characterization.

“Low priority” OTUs have a 98% identity to either GOLD-Human or HMP strains database or are seen in fewer than 20% of the samples from the body habitat in which they were observed most frequently. “Medium priority” OTUs had between a 90%–98% identity to either the GOLD or HMP strains database while “High priority” OTUs had less than a 90% identity to both the GOLD-Human or HMP database. (Both “Medium priority” and “High priority” OTUs, are present in at least 20% of the samples from the body habitat in which they were observed most frequently.).