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The impact of CO2 on collection of Aedes aegypti (Linnaeus) and Culex quinquefasciatus Say by BG-Sentinel® traps in Manaus, Brazil
Carbon dioxide (CO2) is an important component for activating and attracting host-seeking mosquitoes. The BG-Sentinel® trap is a well-established monitoring tool for capturing Culicidae, but CO2 role for the trap effectiveness has not been evaluated in highly urbanised areas. The objective was to ev...
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Published in: | Memórias do Instituto Oswaldo Cruz 2014-01, Vol.108 (2) |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | Carbon dioxide (CO2) is an important component for activating and
attracting host-seeking mosquitoes. The BG-Sentinel® trap is a
well-established monitoring tool for capturing Culicidae, but CO2 role
for the trap effectiveness has not been evaluated in highly urbanised
areas. The objective was to evaluate the effectiveness of BG-Sentinel
traps baited with and without CO2 for capturing urban mosquitoes.
Fifteen areas were selected within the city of Manaus, Brazil, where
four BG-Sentinels were operated for 24 h, two of them with CO2 and two
without CO2. Captured Aedes aegypti females were dissected for the
determination of their parity status. A significantly higher proportion
of traps (from 32-79%) were positive for female Ae. aegypti when using
the BG-Sentinel with CO2 (χ2 = 11.0271, p < 0.001). Catches of
female Culex spp were six times higher in CO2 traps (Mann-Whitney U
test = 190.5; p = 0.001). Parity rates were similar for both traps.
This study showed that CO2 has primarily an enhancing effect on the
efficacy of BG-Sentinel for capturing Culex spp in Manaus. For Ae.
aegypti, the positivity rate of the trap was increased, when CO2 was
added. |
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ISSN: | 1678-8060 |