| 摘要 |
A test device provides an enclosed gas entrapment system for the safe determination of both the presence and rate of occurrence of fermentation gases where the targeted microorganisms were both present and active. The gas entrapment device has a density greater than the liquid culture medium within the chamber and therefore settles to the base of the chamber and includes slots in the vertical walls of the device which allow the passage of fermentative microorganisms into and out of the device during the period of culture and examination. When there has been the generation of gases entrapped within the device, the density of the device becomes compromised forcing the device to elevate in the liquid fermenting medium to form an indication that gases have been produced in the sample by the microorganisms and that organisms are present.
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