Table 5.
Number of villages with optimal, moderate, alarm and emergency Breteau index (B.I.)
| District no. | Sample villages | Optimal index | Moderate index | Alarm index | Emergency index |
|---|---|---|---|---|---|
| 6501 |
20 |
0 |
3 |
14 |
3 |
| 6502 |
9 |
0 |
2 |
7 |
0 |
| 6503 |
8 |
1 |
0 |
6 |
1 |
| 6504 |
12 |
3 |
3 |
3 |
3 |
| 6505 |
7 |
0 |
4 |
3 |
0 |
| 6506 |
13 |
1 |
1 |
10 |
1 |
| 6507 |
6 |
0 |
1 |
4 |
1 |
| 6508 |
11 |
0 |
0 |
11 |
0 |
| 6509 | 6 | 0 | 2 | 4 | 0 |
According to the risk levels set by National Institute of Health (NIH), Thailand optimal control is a B.I. < 5% and emergency levels of infestation are indicated by a B.I. of 50% or greater. Further as per Ministry of Public Health Thailand (MOPH), Phitsanulok two more groups were categorized, i.e. B.I. between 5% and 10% as moderate index and B.I. between 20 to 50% as alarm index.