Assessing the combined effects of household type and insecticide effectiveness for kala-azar vector control using indoor residual spraying: a case study from North Bihar, India

Table 1 Different types of household level risk factors associated with P. argentipes abundance identified for risk scoring

Household level risk factor	Subcategory	Risk score
A. Type of floor (TF)^a,b	A1. Cemented	0
A. Type of floor (TF)^a,b	A2. Mud	1
B. Type of wall (TW)^a,b	B1. Brick with cement plastered	0
	B2. Brick	1
	B3. Thatched	2
	B4. Mud and brick with mud plastered	3
C. Type of roof (TR)^a,b	C1. Cemented and asbestos	0
	C2. Tiles and cuprile	1
	C3. Thatched	2
D. Dwelling status (DS)^a,b	D1. No cattle shed	0
	D2. Separate dwelling	1
	D3. Mixed dwelling/attached cattle shed	2
E. IRS-status (IRSS)^c	E1. Not sprayed	2
	E2. Partially sprayed	1
	E3. Fully sprayed	0
F. Insecticide susceptibility of vector (ISV)	F1. < 90% mortality	2
	F2. 90–98% mortality	1
	F3.> 98% mortality	0

^aHT-risk scores for the groups ‘A–D’ were based on household suitability for sand flies breeding and resting characteristics [26, 29, 30]
^bGroups ‘A–D’ for both invention and control sites for entomological household selection
^cGroup ‘E’ for intervention site for entomological household selection

ISSN: 1756-3305