Cited by 109Malaria Research and ControlMosquito-borne diseases and controlDengue and Mosquito Control Research

Productivity of Malaria Vectors from Different Habitat Types in the Western Kenya Highlands

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Abstract

BACKGROUND: Mosquito Larval Source Management (LSM) could be a valuable additional tool for integrated malaria vector control especially in areas with focal transmission like the highlands of western Kenya if it were not for the need to target all potential habitats at frequent intervals. The ability to determine the productivity of malaria vectors from identified habitats might be used to target LSM only at productive ones. METHODS: Each aquatic habitat within three highland sites in western Kenya was classified as natural swamp, cultivated swamp, river fringe, puddle, open drain or burrow pit. Three habitats of each type were selected in each site in order to study the weekly productivity of adult malaria vectors from February to May 2009 using a sweep-net and their habitat characteristics recorded. RESULTS: All surveyed habitat types produced adult malaria vectors. Mean adult productivity of Anopheles gambiae sensu lato in puddles (1.8/m(2)) was 11-900 times higher than in the other habitat types. However, puddles were the most unstable habitats having water at 43% of all sampling occasions and accounted for 5% of all habitats mapped in the study areas whereas open drains accounted for 72%. Densities of anopheline late instars larvae significantly increased with the presence of a biofilm but decreased with increasing surface area or when water was flowing. Taking stability and frequency of the habitat into account, puddles were still the most productive habitat types for malaria vectors but closely followed by open drains. CONCLUSION: Even though productivity of An. gambiae s.l. was greatest in small and unstable habitats, estimation of their overall productivity in an area needs to consider the more stable habitats over time and their surface extension. Therefore, targeting only the highly productive habitats is unlikely to provide sufficient reduction in malaria vector densities.

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  1. M Coluzzi, 1984, Heterogeneities of the malaria vectorial system in tropical Africa and their significance in malaria epidemiology and control., Bull World Health Organ, 62, 107

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Authors
Ndenga, B. A., Simbauni, J. A., Mbugi, J. P., Githeko, A. K., & Fillinger, U.
Affiliations
  • Kenyatta University (KE)
  • Kenya Medical Research Institute (KE)
  • London School of Hygiene & Tropical Medicine (GB)
Corresponding author
Ndenga, Bryson A.
Venue
PLoS ONE
Published
2011-04-29
Volume
6
Issue
4
Pages
e19473
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2076273012
Cited by
107
References
66
Citations by year
2026: 4 · 2025: 8 · 2024: 3 · 2023: 10 · 2022: 4 · 2021: 14 · 2020: 8 · 2019: 9 · 2018: 4 · 2017: 5 · 2016: 8 · 2015: 9 · 2014: 3 · 2013: 8 · 2012: 7
FWCI
6.61
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • LSHTM Research Online (London School of Hygiene and Tropical Medicine) (acceptedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Kenyatta University Institutional Repository (Kenyatta University) (submittedVersion)
  • Greater South Information System
Funders
World Health Organization
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Malaria Research and Control
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mosquito-borne diseases and control
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Dengue and Mosquito Control Research
Keywords
malaria vectors, Anopheles gambiae s.l., aquatic habitat, puddles, open drains, habitat stability, biofilm, larval density, western Kenya highlands
MeSH terms
Animals, Anopheles, Disease Vectors, Female, Geography, Humans, Kenya, Larva, Malaria, Population Density, Risk Factors, Seasons, Water, Ecosystem, Rivers

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