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Morphological and biochemical characteristics of DB2.
| Morphological and biochemical characteristics | DB2 | |
|---|---|---|
| Colony morphology | Gram’s reaction | Gram positive |
| Shape | Rounded, rod-shaped | |
| Pigment | Creamy white | |
| Surface | Rough | |
| Margin | Irregular | |
| Opacity | Opaque | |
| Endospores | + | |
| Biochemical tests | Nitrate reduction | + |
| Citrate utilization | + | |
| V-P test | + | |
| Methyl red | − | |
| Glucose decomposition | + | |
| Catalase test | − | |
“+” positive; “−” negative.
