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Description:This image depicts four test tubes each containing triple sugar iron agar (TSI) medium. Test tube 1 only contained the agar medium, hence was uninoculated. Test tube 2, contained medium that was inoculated with Shigella sp. bacteria. Test tube 3 contained medium inoculated with Providencia sp. bacteria. Test tube 4 contained medium inoculated with Pseudomonas sp. bacteria.
Note the differing morphology when comparing the bacterial cultures which took shape after the media had been inoculated, and were incubated for an unknown amount of time, and at an unknown temperature.
High Resolution: Click here for hi-resolution image (18.35 MB)
Content Providers(s):CDC/ M.M. Galton
Creation Date:1966
Photo Credit:
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.