Figure 2

Dual olfactory choice between water and skatole during oviposition period of infected Aedes aegypti females. (A) Y-tube experimental setup: solvent (water) or skatole was placed in one of the chemical glass tubes, leading to one of the arms of the Y-tube. The air delivery system allowed a controlled regular equal flow in each arm. Mosquitoes were released in the chamber and their location in the Y-tube recorded at the end of the assay. (B) Results of dual tests with different female groups after the first infectious blood-meal. The Preference Index (PI) indicates females that have chosen the arm with skatole (positive PI) or water (negative PI). Bar plots indicate means of PI (±sem).