title: The impact of CO2 on collection of Aedes aegypti (Linnaeus) and Culex quinquefasciatus Say by BG-Sentinel® traps in Manaus, Brazil.
abstract: 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.
authors.affiliation: Laboratório de Ecologia Química de Insetos Vetores, Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil. tatimingote@hotmail.com
authors.forename: Tatiana Mingote Ferreira
authors.initials: TM
authors.lastname: de Ázara
authors.forename: Carolin Marlen
authors.initials: CM
authors.lastname: Degener
authors.forename: Rosemary Aparecida
authors.initials: RA
authors.lastname: Roque
authors.forename: Jörg Johannes
authors.initials: JJ
authors.lastname: Ohly
authors.forename: Martin
authors.initials: M
authors.lastname: Geier
authors.forename: Álvaro Eduardo
authors.initials: ÁE
authors.lastname: Eiras
mesh_terms: D000330:Aedes / Q000033:anatomy & histology / Q000502:physiology*; D000818:Animals; D001938:Brazil; D002245:Carbon Dioxide; D003465:Culex / Q000033:anatomy & histology / Q000502:physiology*; D004772:Entomology / Q000295:instrumentation / Q000379:methods; D005260:Female; D007303:Insect Vectors / Q000033:anatomy & histology / Q000502:physiology*; D008297:Male; D010053:Ovary / Q000033:anatomy & histology; D010058:Oviposition / Q000502:physiology; D013048:Specimen Handling / Q000295:instrumentation*; D014505:Urban Population
chemical_list: D002245:Carbon Dioxide