| Type of soil/Frequency of occurrence | ||
| Isolate Name | Artificially contaminated soil | Contaminated soil from oil mill site |
| Bacillus licheniformis | 5 (14.7) | 1 (11.1) |
| Bacillus subtilis | 3 (8.8) | 2 (22.2) |
| Bacillus pumilus | 1 (2.9) | - - |
| Flavobacterium sp. | 5 (14.7) | 1 (11.1) |
| Micrococcus luteus | 1 (2.9) | - - |
| Alcaligenssp | 2 (5.9) | 1 (11.1) |
| Pseudomonas putida | 5 (14.7) | - - |
| Bacillus alvei | 4 (11.8) | - - |
| Pseudomonas fluorescens | 2 (5.9) | 2 (22.2) |
| Bacillus megaterium | 1 (2.9) | - - |
| Pseudomonas cepacia | 2 (5.9) | 2 (22.2) |
| Proteus mirabilis | 1 (2.9) | - - |
| Proteus vulgaris | 2 (5.9) | - - |
| Total | 34 (100) | 9 (100) |