Within an ISO Class 5 air quality environment, arrange the vials into three sets, each containing one 50ml test media vial, two empty 50ml serum vials, and one empty 10ml serum vial.
Using a syringe equipped with a vented needle, transfer 25ml from the 50ml test media vial into each empty 50ml serum vials. Repeat this process for the remaining sets of vials. If your standard practice involves using IV transfer tubing sets with vented needles or spikes, you should opt for this transfer method instead.
With the two 50ml vials now containing 25ml of test media each, perform four aseptic transfers of 5ml test media between both vials. Repeat this process for the remaining sets of vials.
Aseptically transfer 5ml from both 50ml vials into the empty 10ml serum vial. Repeat this process for the remaining sets of vials. When completed, you should have three 10ml vials filled with 10ml of test media, one from each set.
Write your name and date of preparation on the three 10ml 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 10ml 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.