A value of HI greater than 5% and/or of BI greater than 20%
for any locality are indications that the locality is prone to
dengue.12 For epidemiological purposes, the HI indicates
potential spread of virus through an area once an infected case
becomes established. Lawns and grounds around the houses
were considered as peri-domestic sites. Unused wells, tree
holes, discarded tyres, empty coconut shells, broken earthen
pots, plastic cups and packets, etc. were considered as breeding
sites