ID#: 15369
Caption:
This image depicts two test tubes, each having been filled with O/F glucose medium, and inoculated with an unknown fermentative bacterial organism. O/F glucose medium consists of agar, glucose, peptone and a pH indicator. Mineral oil had been added to the tube on the right in order to prevent air from interacting with the medium underneath. The organism could be identified as fermentative, for in both test tubes, the change in color of the pH indicator to a yellow color, meant that both media had been changed to an acidic environment, through the metabolism of the glucose in the medium. This was accomplished in either tube, being that fermentation does not require the presence of oxygen.
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Content Provider(s): CDC/ R. E. Weaver, MD, PhD
Creation Date: 1971
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