ID#: 28956
Caption:
This photograph shows a close frontal view of a Petri dish culture plate containing blood agar inoculated with an unspecified anaerobic bacterium to assess nitrate reductase activity. A small paper disk impregnated with potassium nitrate was placed on the agar surface. Reduction of nitrate (NO3-) to nitrite (NO2-) produces a red color change; here, no such change is observed around the disk, indicating a negative reaction.
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Content Provider(s): CDC/ Dr. Gilda L. Jones
Creation Date: 1981
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