CO2 gating of landing on a heat source by anthropophilic and polyphagous Anopheles

Tuesday, November 17, 2015
Exhibit Hall BC (Convention Center)
Benjamin DeMasi-Sumner , Entomology, University of California, Riverside, Riverside, CA
Ring T. Cardé , Department of Entomology, University of California, Riverside, CA
Emerson Lacey , Entomology, University of California, Riverside, Riverside, CA
The relative importance of CO2 and human skin odor in gating short-range host seeking and landing on a heated target of anthropophilic Anopheles is unclear. We used a cage with a heated landing target and CO2 without any skin odors. The concentration of CO2 was varied to determine the threshold needed to gate landing in two species of Anopheles that vary in their preference for human hosts. We determined that similar concentrations of CO2 that gated landing on a heated target in both highly anthropophilic Anopheles coluzzi and polyphagous Anopheles quadrimaculatus. We have shown that CO2 contributes to short-range host-seeking and landing even in highly anthropophilic Anopheles.
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