|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|
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.
Sarfraz et al.
Sarfraz et al. BMC Public Health 2012 12:853 doi:10.1186/1471-2458-12-853