Aerobic bacteria forms red colonies by redox indicator. In addition to the usual 48-hour incubation, it can be used for rapid 24-hour incubation, with good nutrients and a unique redox indicator developed originally.
It is also applicable to ISO4833 compliant usage. Samples containing large amounts of lactic acid bacteria or low temperature bacteria may require 48-hour incubation, so evaluate in advance. Confirm that the number of colonies is equivalent between the 24-hour incubation and 48-hour incubation, and apply the 24-hour incubation.