ID#: 28976
Caption:
This photograph shows a close frontal view of a CDC Lombard-Dowell (LD) Presumpto Plate I quadrant plate, focusing on the quadrant containing LD agar lacking sodium sulfite and supplemented with esculin (1.0 g/L) and ferric citrate (0.5 g/L). This quadrant was inoculated with an unspecified bacterium to assess esculin hydrolysis (esculinase activity). Hydrolysis of esculin produces esculetin, which reacts with ferric ions to form a dark brown to black coloration around bacterial growth.
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Content Provider(s): CDC/ Dr. Gilda L. Jones
Creation Date: 1981
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