Within an ISO Class 5 air quality environment, arrange the vials into three sets, each containing four 10ml vials filled with 5ml test media, along with one empty 50ml serum vial.

Using a syringe equipped with a vented needle, aseptically transfer 5ml of Tryptic Soy Broth test media from each 10ml vial into one empty 50ml serum vial, ensuring a total volume of 20ml per 50ml vial. Repeat this process for the remaining sets of vials.

Write your name and date of preparation on the three 50ml vial labels, one from each set. Then, aseptically apply a sterile adhesive seal to the rubber closures and place the sealed vials inside the provided Whirl-Pak® bag for transfer to the incubator.

Incubate the three 50ml vials at 20°–25°C (68°– 77°F) and 30°–35°C (86°– 95°F) for a minimum of 7 days at each temperature range to detect a broad spectrum of microorganisms. A total incubation period of at least 14 days is recommended to confirm the absence of microbial growth. Any signs of microbial growth, such as turbidity or precipitation, at any point during the incubation period, indicates a failure in the sterility test.