Growth curves of six bacteria species (S. marcescens, n = 7; K. pneumoniae, n = 21; S. epidermidis, n = 21; Pseudomonas sp., n = 15; B. cereus, n = 9; S. aureus, n = 22) in 95 platelet units. All bacteria were inoculated on day zero at 10-50 CFU/ml (10).