BSIs and gut bacterial composition in fecal microbiota transplant recipients. (A) Swimmer plot describing BSI events relative to FMT. Each row represents 1 patient who experienced at least 1 BSI event after FMT treatment. Day 0 is the day of the first FMT; gray dots represent subsequent FMT courses. Squares represent positive blood cultures that are color coded by species. (B) Compositional plot of dominating bacterial taxa (by 16S ribosomal RNA gene analysis) before and after FMT and BSI. Monodominating taxa are coded by color. Taxa with <30% relative abundance are summarized as other and colored gray. (C-E) Temporal dynamics of the gut microbiota (at the genus level) during FMT sessions. BSI type and timing appear in red. Patients 1 (C), 13 (D), and 8 (E). Monodominating taxa are coded by color. Taxa with a relative abundance of <30% are summarized as other.