02424nas a2200229   4500008003900000245012400039210006900163300000800232490000700240520173900247100001901986700001102005700001202016700001302028700001502041700001902056700001502075700001402090700002402104700002102128856004502149       2017                          d00aSeptic transfusion case caused by a platelet pool with visible clotting due to contamination with Staphylococcus aureus0 aSeptic transfusion case caused by a platelet pool with visible c  a2990 v573 aBACKGROUND:

Contamination of platelet concentrates (PCs) with Staphylococcus aureus is one of the most significant ongoing transfusion safety risks in developed countries.
CASE REPORT:

This report describes a transfusion reaction in an elderly patient diagnosed with acute myeloid leukemia, transfused with a 4-day-old buffy coat PC through a central venous catheter. The transfusion was interrupted when a large fibrous clot in the PC obstructed infusion pump flow. Shortly afterward, a red blood cell (RBC) unit transfusion started. After septic symptoms were developed, the RBC transfusion was also interrupted. While the RBC unit tested negative for bacterial contamination, the PC and the patient samples were found to be contaminated with a S. aureus strain that exhibited the same phenotypic and genome sequencing profiles. The isolated S. aureus forms biofilms and produces the superantigen enterotoxin-like U, which was detected in a sample of the transfused PCs. The patient received posttransfusion antibiotic treatment and had her original central line removed and replaced.
DISCUSSION:

As the implicated PC had been tested for bacterial contamination during routine screening yielding negative results, this is a false-negative transfusion sepsis case. Using a point-of-care test could have prevented the transfusion reaction. This report highlights the increasing incidence of S. aureus as a major PC contaminant with grave clinical implications. Importantly, S. aureus is able to interact with platelet components resulting in visible changes in PCs.
CONCLUSION:

Visual inspection of blood components before transfusion is an essential safety practice to interdict the transfusion of bacterially contaminated units.1 aLoza-Correa, M1 aKou, Y1 aTaha, M1 aKalab, M1 aRonholm, J1 aSchlievert, PM1 aCahill, MP1 aSkeate, R1 aC, Cserti-Gazdewich1 aRamirez-Arcos, S  uhttps://notifylibrary.org/reference/4636