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Tests of bednet traps (Mbita traps) for monitoring mosquito populations and time of biting in Tanzania and possible impact of prolonged insecticide treated net use

Published online by Cambridge University Press:  28 February 2007

Nafisah Braimah ,
Chris Drakeley ,
Eliningaya Kweka ,
Frank Mosha ,
Michelle Helinski ,
Helen Pates ,
Caroline Maxwell ,
Thedy Massawe ,
Michael G. Kenward  and
Chris Curtis
Nafisah Braimah
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK NIMR Ubwari Field Station, Box 81, Muheza, Tanga, Tanzania
Chris Drakeley
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK Joint Malaria Programme, Box 2228, Moshi, Tanzania
Eliningaya Kweka
Affiliation:
Joint Malaria Programme, Box 2228, Moshi, Tanzania
Frank Mosha
Affiliation:
Joint Malaria Programme, Box 2228, Moshi, Tanzania
Michelle Helinski
Affiliation:
NIMR Ubwari Field Station, Box 81, Muheza, Tanga, Tanzania
Helen Pates
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK NIMR Ubwari Field Station, Box 81, Muheza, Tanga, Tanzania
Caroline Maxwell
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK NIMR Ubwari Field Station, Box 81, Muheza, Tanga, Tanzania
Thedy Massawe
Affiliation:
NIMR Ubwari Field Station, Box 81, Muheza, Tanga, Tanzania
Michael G. Kenward
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
Chris Curtis*
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
*
*E-mail: [email protected]
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Abstract

Mosquito traps known as Mbita traps made from modified bednets according to a design developed in Kenya were compared with Centers for Disease Control (CDC) light traps for their ability to catch anopheline and culicine mosquitoes in several different villages in northern Tanzania. The results confirmed those recently reported in Kenya, that Mbita traps catch significantly fewer mosquitoes than CDC traps. Statistical analysis using a Poisson log linear model with random effects for the trap counts showed that the ratio of the catches with the two types of trap was not consistent in the different villages. Thus, we doubt whether the Mbita trap would be a reliable substitute for CDC traps. In one trial, the catches made at different hours of the night with the two types of trap indicated that in villages where insecticide treated nets (ITNs) had been used for some years, somewhat more of the Anopheles biting occurred early and late in the night, whereas in villages with no history of ITN use, biting was concentrated in the middle of the night. This suggests that behavioural adaptation to avoid contact with ITNs may be beginning to evolve.

Keywords

mosquito trapsMbita trapCDC light trapTanzaniatime of mosquito bitinginsecticide treated nets
Type
Short Communication
Information
International Journal of Tropical Insect Science , Volume 25 , Issue 3 , September 2005 , pp. 208 - 213
Copyright
Copyright © ICIPE 2005

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