Table 1 Biochemical characterization of the bacterium in C1, C2, and C3
| Â | Bacterial isolates in the isolated communities | ||
|---|---|---|---|
Characteristics | C1- bacterium | C2- bacterium | C3- bacterium |
Gram’s reaction | + | + | + |
Motility | Active motile | Non-motile | motile |
Endospores | + | + | + |
 position | Sub terminal | Sub terminal | Sub terminal |
 shape | Oval | Oval | Oval |
 swollen/no swelling | Swollen | No swelling | No swelling |
Cell shape | Rods | Rods | Rods |
Oxygen relationship | Facultative anaerobe | Facultative anaerobe | Facultative anaerobe |
Catalase (aerobe) | + | + | + |
Oxidase (aerobe) | + | + | + |
Nitrate reduction (anaerobe) | + | + | + |
Voges-proskuer test | – | – | – |
Glucose fermentation | |||
 gas production | – | – | – |
 acid production | + | + | + |
Fermentation of sugars | |||
 L- arabinose | – | – | + |
 D-xylose | – | – | + |
 D-mannitol | – | – | – |
 D-mannose | – | + | – |
Casein hydrolysis | + | + | + |
Gelatin hydrolysis | + | + | + |
Starch hydrolysis | – | – | + |
Citrate utilization | + | + | + |
Tyrosine degradation | – | – | – |
Lecithinase activity | – | – | – |
Indole test | – | – | – |
Growth at pH | |||
 6.8 | + | + | + |
 5.7 | – | – | – |
Growth in NaCl | |||
 7% | + | + | + |
 10% | + | + | + |
Growth at temperatures | |||
 30 °C | + | + | + |