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" ... In an extensive post-market surveillance study involving 18 transfusion centers using Verax’s Pan Genera Detection (PGD) system, the importance of employing secondary testing was demonstrated conclusively. The PGD test identified no less than nine units out of 27,620 units that had originally tested negative by early culture but were, in fact, positive for bacteria. The detection rate observed in the study – 9:27,620 or 1:3,069 units – can be extrapolated to a detection rate of 326 contaminated units per million platelet doses. Based on the U.S. apheresis platelet supply, that equates to approximately 550 highly contaminated units per year. Perhaps small numbers as a percentage of total transfused units of blood platelets, but why should anyone risk bacterial infection when we have the means to prevent it? ... "