Table 6.
Number of villages with optimal, moderate, alarm and emergency house index (H.I.)
| District no. | Sample villages | Optimal index | Moderate index | Alarm index | Emergency index |
|---|---|---|---|---|---|
| 6501 |
20 |
1 |
0 |
5 |
14 |
| 6502 |
9 |
1 |
1 |
1 |
6 |
| 6503 |
8 |
0 |
0 |
1 |
7 |
| 6504 |
12 |
0 |
0 |
4 |
8 |
| 6505 |
7 |
0 |
0 |
1 |
6 |
| 6506 |
13 |
1 |
1 |
2 |
9 |
| 6507 |
6 |
0 |
0 |
1 |
5 |
| 6508 |
11 |
0 |
0 |
1 |
10 |
| 6509 | 6 | 0 | 1 | 2 | 3 |
According to the risk levels set by National Institute of Health (NIH), Thailand optimal control is a H.I. < 1% and emergency levels of infestation are indicated by a H.I. of 10% or greater. Further as per Ministry of Public Health Thailand (MOPH), Phitsanulok two more groups were categorized, i.e. H.I. between 1% and 5% as moderate index and H.I. between 5 to 10% as alarm index.