Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-14T17:36:11.416Z Has data issue: false hasContentIssue false
  • English
  • Français

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: Chris.Curtis@lshtm.ac.uk
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Charlwood, J. D. and Graves, P. M. (1987) The effect of permethrin-impregnated bednets on a population of Anopheles farauti in coastal Papua New Guinea. Medical and Veterinary Entomology, 1, 319–327.CrossRefGoogle ScholarPubMed
Cox, D. R. and Hinkley, D. V. (1974) Theoretical Statistics Chapman and Hall, London, 511 pp.CrossRefGoogle Scholar
Curtis, C. F., Myamba, J. and Wilkes, T. J. (1996) Comparison of different insecticides and fabrics for anti-mosquito bednets and curtains. Medical and Veterinary Entomology, 10, 1–11.CrossRefGoogle ScholarPubMed
Ijumba, J. N., Mosha, F. W. and Lindsay, S. W. (2002) Malaria transmission risk variation derived from different agricultural practices in an irrigated area of northern Tanzania. Medical and Veterinary Entomology, 16, 28–38.CrossRefGoogle Scholar
Laganier, R., Randimby, F. M., Rajaonarivelo, V. and Robert, V. (2003) Is the Mbita trap a reliable tool for evaluating the density of anopheline vectors in the highlands of Madagascar?. Malaria Journal, 2, 42CrossRefGoogle Scholar
Lines, J. D., Curtis, C. F., Wilkes, T. J. and Njunwa, K. J. (1991) Monitoring human-biting mosquitoes (Diptera: Culicidae) in Tanzania with light-traps hung beside mosquito nets. Bulletin of Entomological Research, 8, 77–84.CrossRefGoogle Scholar
Magesa, S. M., Wilkes, T. J., Mnzava, A. E., Njunwa, K. J., Myamba, J., Kivuyo, M. D., Hill, N., Lines, J. D. and Curtis, C. F. (1991) Trial of pyrethroid impregnated bednets in an area of Tanzania holoendemic for malaria. Part 2: Effects on the malaria vector population. Acta Tropica, 49, 97–108.CrossRefGoogle Scholar
Mathenge, E. M., Killeen, G. F., Oulo, D. O., Irungu, L. W., Ndegwa, N. W. and Knols, B. G. (2002) Development of an exposure-free bednet trap for sampling Afrotropical malaria vectors. Medical and Veterinary Entomology, 16, 1–8.CrossRefGoogle ScholarPubMed
Mathenge, E. M., Omweri, G. O., Irungu, L. W., Ndegwa, P. N., Walczak, E., Smith, T. A., Killeen, G. F. and Knols, B. G. (2004) Comparative field evaluation of the Mbita trap, the Centers for Disease Control light trap, and the human landing catch for sampling of malaria vectors in western Kenya. American Journal of Tropical Medicine Hygiene, 70, 33–37.CrossRefGoogle ScholarPubMed
Mbogo, C. N., Mosha, F. W., Nguma, J. F. M. (1996) The impact of permethrin impregnated bednets on malaria vectors of the Kenyan coast. Medical and Veterinary Entomology, 10, 251–259.CrossRefGoogle ScholarPubMed
Mnzava, A. E. P. and Kilama, W. L. (1986) Observations on the distribution of the Anopheles gambiae complex in Tanzania. Acta Tropica, 43, 277–282.Google ScholarPubMed
Njau, R. J. A., Mosha, F. W. and Nguma, J. F. M. (1993) Field trials of pyrethroid impregnated bednets in Northern Tanzania. Part 1: Effect on malaria transmission. Insect Science and Its Application 14, 575–584.Google Scholar
Paine, T., Maxwell, C. A. and Curtis, C. F. (1999) Does prologed use of insecticide-treated bednets lead to change in the biting time of malaria vectors?. Transactions of the Royal Society of Tropical Medicine and Hygiene, 93, 120–120.Google Scholar
Quiñones, M. L., Lines, J. D., Thomson, M. C., Morris, J. and Greenwood, B. M. (1997) Anopheles gambiae gonotrophic cycle duration, biting and exiting behaviour unaffected by permethrin impregnated bednets in The Gambia. Medical and Veterinary Entomology, 11, 71–78.CrossRefGoogle ScholarPubMed
SAS (2002) v. 8.1. SAS Worldwide Headquarters Cary, North Carolina 27513, Campus Drive USA.Google Scholar