Impact of Sustained Use of Insecticide-Treated Bednets on Malaria Vector Species Distribution and Culicine Mosquitoes

Insecticide-treated bednets (ITNs) significantly reduce malaria vector populations. Susceptibility to ITNs differs by vector species, and culicine mosquitoes have not been shown to be significantly affected by the use of ITNs. We examined the impact of 2–4 yr of ITN use on malaria vector species dis...

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Bibliographic Details
Published in:Journal of medical entomology 2006-03, Vol.43 (2), p.428-432
Main Authors: Lindblade, K. A., Gimnig, J. E., Kamau, L., Hawley, W. A., Odhiambo, F., Olang, G., ter Kuile, F. O., Vulule, J. M., Slutsker, L.
Format: Article
Language:English
Subjects:
Africa
Animals
Anopheles arabiensis
Anopheles funestus
Anopheles gambiae
bed nets
Bedding and Linens
Biological and medical sciences
Blood
Culicidae
Culicidae - drug effects
Culicidae - parasitology
Culicidae - physiology
Culicinae
Demography
Female
Fundamental and applied biological sciences. Psychology
impregnated fabrics
insect vectors
Insect Vectors - drug effects
Insect Vectors - parasitology
Insect Vectors - physiology
insecticide-treated bednets
Insecticides
Kenya
malaria
Malaria - epidemiology
Malaria - prevention & control
Medically important nuisances and vectors, pests of stored products and materials: population survey and control
mosquito control
Mosquito Control - methods
mosquito nets
Permethrin - pharmacology
Population Density
pyrethroid insecticides
SHORT COMMUNICATIONS
species diversity
Sporozoites
Time Factors
vector control
Vectors. Intermediate hosts
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Description
Summary:Insecticide-treated bednets (ITNs) significantly reduce malaria vector populations. Susceptibility to ITNs differs by vector species, and culicine mosquitoes have not been shown to be significantly affected by the use of ITNs. We examined the impact of 2–4 yr of ITN use on malaria vector species distribution and culicine mosquitoes. Routine entomological surveillance was conducted in adjacent areas with and without ITNs from November 1999 to January 2002. Use of ITNs reduced the proportion of Anopheles gambiae Giles relative to Anopheles arabiensis Giles. The number of culicines per house was significantly lower in the ITN area than in the neighboring area. Changes in the An. gambiae sibling species distribution may help to explain apparent mosquito behavioral changes attributed to ITNs. Reductions in culicines by ITNs may have implications for community perceptions of ITN effectiveness and for control of other diseases such as lymphatic filariasis.
ISSN:0022-2585
1938-2928
DOI:10.1603/0022-2585%282006%29043%5B0428%3AIOSUOI%5D2.0.CO%3B2