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Impact on patient outcome following transfusion of bacterially contaminated platelets: the M.D. Anderson Cancer Center experience.

This study examined the clinical outcome of every patient who received a bacterially contaminated unit of platelets at The University of Texas M.D. Anderson Cancer Center, Houston, during 2007. Samples of platelets were aerobically cultured and read for 1 day at 35 degrees C. Positive bottles were subcultured in the appropriate media. The effect of independent variables in the clinical outcome of patients infused with bacterially contaminated platelet units was analyzed. A total of 23,199 platelet units were transfused, 71 of which were bacterially contaminated units; 8 were apheresis platelets and 63 were whole blood platelets. Of the 71 units, 70 were contaminated with gram-positive bacteria and 1 with gram-negative bacteria. Only 1 patient developed fever, and coagulase-negative staphylococci were isolated from the transfused unit. Transfusion of fresh units and antibiotic therapy possibly explain the lack of clinical consequences in our patients.