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ID#:22205
Description:Caption:
This photograph depicts three test tubes, each containing a motility medium with triphenyl tetrazolium chloride (TTC), as a growth indicator. The far left tube was inoculated with an ATCC control strain of non-motile Staphylococcus bacteria, and incubated for a 24 hour time period. The middle tube was inoculated with an ATCC control strain for non-pathogenic, motile, Escherichia coli bacteria, and also incubated for a 24 hour time period. The far right tube was also inoculated with the ATCC control strain for non-pathogenic, motile, Escherichia coli bacteria, but allowed to grow for a 5-day time period, which allowed for the bacterial swarm, in order to represent what would happen had Salmonella enterica serovar Typhimurium bacteria been used in place of the E. col.
Additional Information:
You’re able to see that the organisms in tube #1, i.e., non-motile Staphylococcus, remained affixed to the tract, and fracture lines formed by the inoculating needle, upon their introduction to the motility medium. While those organisms in tube #2, i.e., motile E, coli, are seen to have begun migrating away from the needle tract, out into the surrounding medium. Finally, those organisms in tube #3, again motile E. coli, were permitted to migrate throughout the tube, given their 5-day, elongated incubation period.
High Resolution: Click here for hi-resolution image (19.77 MB)
Content Providers(s):CDC/ Todd Parker, Ph.D., Assoc Director for Laboratory Science, Div of Preparedness and Emerging Infections at CDC
Creation Date:2017
Photo Credit:Todd Parker, Ph.D., Assoc Director for Laboratory Science, Div of Preparedness and Emerging Infections at CDC
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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.

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