Prior to targeted approach | Targeted approach | |
---|---|---|
IRS commodity planning | Commodities needed are estimated by multiplying the number of houses sprayed the previous year by an estimate of population growth | Commodities needed are calculated based on households mapped and targeted |
IRS identification of structures | One month spent conducting a ground based census; stickers on doors identify households for spraying | One week spent enumerating structures from freely available satellite imagery through a desktop exercise |
IRS targeting | Clusters of households identified for spraying based on geographic proximity to district health facilities and roads, and risk according to local knowledge | All households mapped, clusters of 25 or more households created, monthly health facility incidence calculated, clusters selected based on household density and clinical malaria incidence |
IRS planning | Largely based on accessibility for spray teams and local knowledge/perception of malaria burden | Based on malaria incidence reported to health centers and population density, then subjected to local review |
IRS implementation | Paper-based data recording | Mapped houses guide implementation. During IRS, all geographic positioning system (GPS) coordinates recorded in real-time allowing for ‘mop up’ of missed households |
IRS surveillance | Malaria indicator survey (MIS) provides data on whether houses were sprayed. This survey occurs once every 3 years | All GPS coordinates for sprayed and unsprayed houses recorded for analysis |