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Bacterial screening of platelet concentrates: results of 2 years active surveillance of transfused positive cultured units released as negative to date

Background  The BacT/ALERT system for bacterial monitoring of platelet concentrates (PCs) was introduced in the Netherlands in 2001. Samples are cultured for 7 days, and as a result of the short shelf‐life of PCs, they are usually released as ‘negative to date’. Therefore, some of the PCs have already been transfused at the moment of a positive signal in continued cultures in the BacT/Alert. It is unclear, however, whether these PCs are associated with more transfusion reactions.