Fig. 3

Diagrammatic representation of household selection for studying exposure to An. stephensi. Large shaded circles indicate the selected households together with additional structures within a 50-m radius for entomological collection. Shaded circle designated with A indicates the first selected household (in red) located toward the center of the town. Shaded circles designated with B–E indicate 4 additional households that were selected by moving 100 m (blue dotted line) in four directions from the first selected household. The remaining 45 households were selected by repeating this approach 9 times. The numbers in the blue circle indicate different types of structures within a 50-m radius of the selected household for adult or immature-stage mosquito collection