Malaria vector species composition and entomological indices following indoor residual spraying in regions bordering Lake Victoria, Tanzania

Table 2 Overview of monthly cone bioassay in sprayed houses to determine residual efficacy

Year	No. of districts	No. of wall types tested ^(a)	No. of houses tested p/month ^(b)	Cone replicates p/month ^(c)	No. of An. gambiae Kisumu tested p/month
2015	7	5	70	210	2100
2016	8	5	80	160	1600
2017	10	5	100	200	2000

(a) Five surface types of wall tested were mud, cement, painted, white wash and burnt brick. (b) There were at least 2 houses per surface type. (c) In 2015, 3 cones were placed on treated wall surfaces (1.5 m 1 m, 0.5 m); while in 2016 and 2017 only 2 cones were placed at 2 m and 1 m height from the floor, respectively

ISSN: 1475-2875