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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Bibliographic Details
Published in:Memórias do Instituto Oswaldo Cruz 2013-04, Vol.108 (2), p.229-232
Main Authors: de Ázara, Tatiana Mingote Ferreira, Degener, Carolin Marlen, Roque, Rosemary Aparecida, Ohly, Jörg Johannes, Geier, Martin, Eiras, Álvaro Eduardo
Format: Article
Language:English
Subjects:
adult mosquitoes
Aedes - anatomy & histology
Aedes - physiology
Animals
Brazil
Carbon Dioxide
Culex - anatomy & histology
Culex - physiology
dry ice
Entomology - instrumentation
Entomology - methods
Female
Insect Vectors - anatomy & histology
Insect Vectors - physiology
Male
Ovary - anatomy & histology
Oviposition - physiology
PARASITOLOGY
Short Communications
Specimen Handling - instrumentation
TROPICAL MEDICINE
urban area
Urban Population
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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.
ISSN:0074-0276
1678-8060
1678-8060
0074-0276
DOI:10.1590/0074-0276108022013016