1 London School of Hygiene and Tropical Medicine, Keppel Street, London, United Kingdom.
The typical attractant used in gravid trapping of Culex quinquefasciatus is an aged infusion of organic materials, which can change in attractiveness over time. A standardized chemical attractant dispenser derived from grass infusion, the AtrAedes™ lure, has been produced for the surveillance of the dengue vector Aedes aegypti. A study using this lure in combination with the Centers for Disease Control and Prevention gravid traps was conducted in Tanga, Tanzania. The addition of the lure to traps baited with either grass infusion or tap water did not result in significant increases in trap catch. Grass infusion-baited traps (with and without the AtrAedes lure) collected significantly more Cx. quinquefasciatus than traps baited with AtrAedes + tap water, tap water alone, or AtrAedes alone. The catches of the traps baited with AtrAedes + tap water, tap water alone, and AtrAedes alone were not significantly different from each other. Although the placement of the lure in the base of the trap may have decreased trap catches, it seems that the AtrAedes is not as effective as grass infusion for collecting Cx. quinquefasciatus in Tanzania.
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