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Description:This image depicts two test tubes. The tube at left contained triple sugar iron (TSI) growth medium on a slant, and the tube at right contained O/F glucose medium. Each tube had been inoculated with a microorganism that was classified as being non-oxidative, and non-fermentative, which is evidenced through the lack of any color change in the O/F glucose medium (Rt), nor the TSI medium tube (Lt).
The lack of color change in the O/F glucose medium (Lt), identified the organism as one that neither oxidizes nor ferments glucose, for in each case the medium would have been turned acidic, thereby, changing the medium to a yellow coloration. Had oxidation or fermentation occurred in the TSI tube (Lt), a color change to yellow, either in the butt alone, or throughout the tube, i.e., depending upon which sugars were metabolized, would have occurred.
High Resolution: Click here for hi-resolution image (18.35 MB)
Content Providers(s):CDC/ Dr. R. Weaver
Creation Date:1971
Photo Credit:
Links:Becton Dickinson and Company (BD) – “BBL™ TSI Agar Slanta”: QUALITY CONTROL PROCEDURES
Becton Dickinson and Company (BD) – “BBL™ OF Basal Medium, BBL™ OF Medium with Dextrose”: QUALITY CONTROL PROCEDURES
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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.