Figure 8. VRE dominates the intestinal microbiota in humans prior to invading the bloodstream.

Phylogenetic classification of 16S rDNA frequencies in stool samples collected from allo-HSCT patients. Samples were collected upon hospital admission and periodically during the transplant course; 5 patients were studied. Each bar represents the microbiota of 1 stool sample. The timing of sample collection relative to the day of transplant (day 0) is indicated below each bar. The most predominant bacterial populations identified are color coded as indicated. The timing of VRE bloodstream infection relative to analyses of the microbiota for patients A and B is indicated by red horizontal bars.