Sampling of adult container-breeding Stegomyia to monitor mosquito densities and spatial and temporal distribution has been a great contribution in the control of dengue vectors ( Barrera 2011, de Melo et al. aegypti, whereby eggs laid during each gonotrophic cycle are distributed among several oviposition sites ( Colton et al. Ovitrap collections also represent a poor proxy for measuring adult abundance because of “skip oviposition” behavior observed in Ae. Although ovitraps are inexpensive, easy to assemble and operate, laboratory facilities are required for egg counting, larvae rearing, and vector identification. 2006a), and to evaluate the efficacy of vector control strategies ( Russell and Ritchie 2004). 2012), to study the dispersal of the vector population ( Maciel-de-Freitas et al. aegypti ( Chadee and Ritchie 2010a) and their spatial and temporal distribution ( Honório et al. 1991) has been used worldwide for >50 yr to detect the presence of adult Ae. Unfortunately, this method is labor-intensive, and entomological indices generated from these methods may be inappropriate to describe the adult population and predict dengue transmission ( Focks 2003).Įgg sampling using oviposition traps (ovitrap Fay and Eliason 1966, Reiter et al. Surveillance of the immature stages (larvae, pupae, or both) is still used in areas where dengue occurs. Because a vaccine is not commercial available, vector control remains the key strategy for dengue intervention ( Simmons et al. The GAT is an effective, practical, low cost, and easily transportable trap, features that are essential in large-scale monitoring programs, particularly in areas where funding is limited.Īedes aegypti, gravid trap, monitoring, dengueĪedes aegypti (L.) is the primary vector of dengue fever in the Americas, Asia, and tropical countries. aegypti when compared with sticky ovitraps. We conclude that the GAT is more efficient in recapturing gravid Ae. The visual contrast created by the addition of a white lid to the top of the black funnel significantly increased the number of captured gravid mosquitoes when compared with the GAT-LgBF in semifield trials. We also demonstrated that the visual cues of the prototype GAT-LgBF (large black base bucket with a black funnel at the top of the translucent chamber) captured a significantly higher proportion of gravid mosquitoes than the other prototypes. In semifield observations, the GAT captured a significantly higher proportion of gravid mosquitoes than the double sticky ovitrap. Gravid mosquitoes are lured to a black bucket base containing oviposition attractant (infusion) and are trapped in a translucent chamber impregnated with a pyrethroid insecticide where they are killed within 3–15 min. aegypti and an insecticide to kill trapped mosquitoes. The GAT concept relies on visual and olfactory cues to lure gravid Ae. The GAT does not require electricity to function, and trapped mosquitoes are identified easily during trap inspections. We have developed and evaluated the Gravid Aedes Trap (GAT) through a sequential behavioral study. Monitoring dengue vector control by sampling adult Aedes aegypti (L.) recently has been used to replace both larval and pupal surveys.
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