| Bacteria species | Bacteria isolated | |
| Number | % | |
| E. coli | 289 | 48.9 |
| Klebsiella spps. | 83 | 14.0 |
| Salmonella spps. | 108 | 18.3 |
| Shigella spps. | 111 | 18.8 |
| Total | 591 | 100 |