In this pilot study, 40 patients in the transplant intensive care unit (where SDD has been used intermittently for at least 10 years), will be randomized to SDD or no SDD. These patients will be known to be VRE positive at baseline. The effects of SDD on the density of VRE in the stool on day 7 compared to pre-SDD will be the primary endpoint. Secondary endpoints will be detection of MRSA and colistin resistant Pseudomonas in the stool.