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Vancomycin resistant enterococci (VRE) infections in hematopoietic stem cell transplant (HSCT) recipients.

7036 Background: VRE blood stream infections (BSI) pose significant hazards to HSCT patients. Risk factors predisposing patients for a relatively nonpathogenic organism to become bacteremic include immune suppression, neutropenia, renal failure, antibiotic exposure, indwelling catheters, and VRE colonization. Some studies suggest that a VRE BSI is simply a marker of primary disease severity or an indicator of poor outcome, while other data demonstrate VRE BSI as an independent predictor of mortality.


METHODS
We performed a retrospective chart analysis of HSCT patient data using the electronic medical record and written charts using a standard data collection tool from February 1994 to October 2008. Vancomycin susceptibility was determined using the Dade Berhing panel.


RESULTS
We noted 625 infections in 385 HSCT patients; 26 patients developed 27 VRE infections over the course of 15 years. All isolates were Enterococcus faecium and not polymicrobial. Host characteristics included mean age of 49.5 yrs, all had central venous catheters, and 26 received linezolid treatment. Persistent infection was identified in 11 patients with central access removal in 4. VRE colonization was identified in stool (18 patients) and urine (5 patients) and 4 patients had a prior VSE BSI. 16 patients received vancomycin within 30 days of developing VRE BSI. 21 patients were neutropenic (mean duration15 days). 8 patients were not receiving immunosuppressants during time of bacteremia. Gastrointestinal endoscopy was identified in 6 patients prior to BSI. 16 patients died during the hospitalization.


CONCLUSIONS
VRE accounted directly or indirectly for 13 of 16 deaths during incident hospitalization. In this population, blood, urine, stool surveillance is warranted to prevent morbidity/mortality related to developing a VRE BSI. Prolonged neutropenia was associated with development of a VRE BSI prophylactic granulocyte transfusion might be useful to prevent BSI. In contrast to prior studies, many patients were not receiving immunosuppressants and did not undergo GI instrumentation. VRE BSI prevention should include identifying patients with urinary or stool colonization, appropriate isolation and early central venous catheter removal if a VRE BSI is identified. No significant financial relationships to disclose.