| Sampling time | Simples | Gender(n) | Occupation | |
| Male | Female | |||
| 2008.04 | 16 | 7 | 9 | Farmers |
| 2008.06 | 16 | 7 | 9 | |
| 2008.08 | 13 | 6 | 7 | |
| 2008.11 | 10 | 3 | 7 | |
| 2009.01 | 12 | 7 | 5 | |
| 2009.02 | 14 | 8 | 6 | |
| Total | 81 | 38 | 43 | |