title: Comparison of carbon dioxide-baited trapping systems for sampling outdoor mosquito populations in Tanzania.
abstract: For collecting mosquitoes (Diptera: Culicidae) the outdoor catching efficiency of four types of trapping devices baited with carbon dioxide (CO2, 300 ml/ min) was evaluated and compared in two areas of Tanzania. The types of traps employed were: the CDC miniature trap with the incandescent light bulb switched on or off; electric nets (ENT) and a Counterflow Geometry (CFG) trap. In Njage, southeast Tanzania, Anopheles gambiae Giles sensu stricto was the most abundant of the seven mosquito species obtained, comprising of 74.3% of the total number caught (n=2,171). In Muheza, north-east Tanzania, Culex quinquefasciatus Say was the predominant species (90.9%) among 1,080 caught. At both localities the CFG trap was superior to the CDC trap with light-on or light-off for sampling both An. gambiae and Cx. quinquefasciatus. Efficiency of the CFG trap and ENT were similar for sampling these species of mosquitoes (P > 0.05). However, ENT was superior to the CDC trap with light-off for collecting both species. Significantly more (P < 0.05) Cx. quinquefasciatus were obtained by the CDC trap with light-off than with light-on, especially outdoors. It is concluded that both ENT and the CFG are effective tools for sampling populations of An. gambiae and Cx. quinquefasciatus outdoors.
authors.affiliation: National Institute for Medical Research, Ubwari Field Station, Muheza, Tanzania. nimr.amani@twiga.com
authors.lastname: Mboera LEG
authors.lastname: Knols BGJ
authors.lastname: Braks MAH
authors.forename: W
authors.initials: W
authors.lastname: Takken
mesh_terms: D000818:Animals; D000852:Anopheles; D002245:Carbon Dioxide; D003465:Culex; D005260:Female; D009032:Mosquito Control / Q000379:methods*; D013636:Tanzania
chemical_list: D002245:Carbon Dioxide