A total of 40 patients will be randomized to SDD or no SDD by the Investigational Drugs Service of the Pharmacy. No placebo will be used for those assigned not to receive SDD. Patients will either receive standard of care or standard of care + SDD. No treatment of any kind is being withheld from the participants. Enrolled patients will be those known to be colonized with VRE (after obtaining informed consent from patients or patients' proxy). SDD will be given enterally through the nasogastric tube which will then be clamped for 1 hour. SDD will be stopped when patients are extubated. Otherwise SDD will be given for 7 days.