Table 3.
Biochemical characterization of bacterial isolates.
| Parameters | Bacterial isolates | ||
|---|---|---|---|
| Biochemical characterization | M2 | M8 | M13 |
| Catalase test | + | + | + |
| Anaerobic growth | + | + | + |
| Oxidase test | + | − | + |
| Citrate utilization | + | − | + |
| Urea hydrolysis | + | + | + |
| Casein hydrolysis | + | + | + |
| Triple sugar iron test (TSI) | |||
| Carbohydrate fermentation | Only glucose fermentation | Both glucose and lactose fermentation | Only glucose fermentation |
| TSI (butt) | Yellow | Yellow | Yellow |
| TSI (slant) | Red | Yellow | Red |
| TSI (H2S) production | + | + | + |
| TSI (gas) production | + | − | + |
Key: + = positive; − = negative.