Field Evaluation of Selected Traps and Lures for Monitoring the Filarial and Arbovirus Vector, <I>Aedes polynesiensis</I> (Diptera: Culicidae), in French Polynesia

Abstract

The efficacy of the BG-Sentinel (BGS) and the BG-Mosquitito (BGM) mosquito traps for sampling populations of the important filariasis and dengue vector Aedes (Stegomyia) polynesiensis (Marks) was evaluated in French Polynesia against human bait collections (HBC) using a modified Centers for Disease Control and Prevention backpack aspirator. Traps were baited with BG-Lure (a combination of lactic acid, ammonia, and caproic acid) or carbon dioxide plus octenol (1-octen-3-ol) known as attractants to aedine mosquitoes. Mosquito sampling was conducted on two typical islands of French Polynesia: the high, volcanic island of Moorea, and the low, coral island (atoll) of Tetiaroa Sampling efficacy was measured in a randomized Latin Square design. Production of carbon dioxide from yeast-sugar fermentation was used as an alternative source of CO2 because supply via dry ice, gas cylinders, or propane combustion in remote tropical islands is costly and challenging. Although the BGS trap captured the greatest number ofAe. polynesiensis in both island settings, catch rates of BGS or BGM baited with either lure were not significantly different from that of HBC. On Moorea, the number of collected aedes species in the BGS trap baited with either lure was significantly greater than the BGM with BG-lure. On Tetiaroa, BGM trapping was severely hampered by damage from rats, and the traps were removed from the study. Our study confirms the efficiency, comparability, and convenience of the BGS trap, a robust and safe alternative to HBC for sampling Aedes mosquitoes in research and surveillance efforts against filariasis and arboviruses in the South Pacific.

Controlling mosquitoes with semiochemicals: a review

“…aegypti when using human bait collections. This finding shows that the males of some species are attracted to and orientate towards host cues in the field [23].…”

“…Hapairai et al [23] reported collecting a larger number of male than female Ae. aegypti when using human bait collections.…”

Using adult Aedes aegypti females to predict areas at risk for dengue transmission: A spatial case-control study

“…Consequently, traps can generate entomological indices more accurately, and estimate the risk of dengue, zika, and chikungunya transmission with greater precision (Barrera, 2016;Steffler et al, 2011). These traps are as effective as human bait collection, and are more effective than manual aspirators (Figueiredo et al, 2013;Hapairai et al, 2013;Maciel-de-Freitas et al, 2006. Other tools to detect high-risk clusters in a given area are Geographical Information Systems (GISs) and spatial analysis techniques, as demonstrated by Barbosa et al (2014) and Chiaravalloti-Neto et al (2015).…”

Development and optimization of the Suna trap as a tool for mosquito monitoring and control

“…The trap would also be effective during the times of day when vectors are most active. Medical entomologists work towards the development of traps that meet as many of these requirements as possible [3-5]. …”