| S/N | Source of Sample | Mahalanobis Distance (Should not exceed 3) | Status |
| 1. | Positive Control | 2.2 | Passed |
| 2. | Singida | 5.6 | Failed |
| 3. | Pandambili | 4.5 | Failed |
| 4. | Kibaigwa | 4.2 | Failed |
| 5. | Mpwapwa | 2.7 | Passed |
| 6. | Singida | 6.7 | Failed |
| 7. | Kondoa | 2.6 | Passed |