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Abstract

device trays was examined. Sterile device trays were aseptically filled with growth medium, exposed to microbial challenge, incubated, and inspected for growth. During microbial challenge, all package systems were subjected to a pressure differential that simulated those experienced during distribution. Penetration rates were significantly decreased (P = 0.01) when unlidded trays were packaged in pouches (0/39), compared to those in cartons (37/39). Similarly, the number of colony forming units (CFU) present was greater for unlidded trays packaged in cartons, compared to those in pouches (P = 0.03). To further explore the efficacy of cartons as a barrier to microbial ingress, lidded trays with a single 100 μm breach were packaged in cartons and subjected to the same methodologies; approximately 15% exhibited growth. When compared to unlidded trays, penetration rates (P

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