Document Detail


Mosquito larval habitats in a semiarid ecosystem in Eritrea: impact of larval habitat management on Anopheles arabiensis population.
MedLine Citation:
PMID:  17255237     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study investigated the impact of larval management and the temporal variation in larval productivity in Eritrea, a semiarid ecosystem. Results of this study show that mosquito breeding persists throughout the year mainly in stream bed pools. Anopheles arabiensis production in the ephemeral natural aquatic habitats such the streambed pools was high throughout the year and negatively associated with rainfall (r = -0.288, P = 0.047). High densities of An. arabiensis larvae were also recorded from canals and drainage channels at wells and communal water supply points. The numerous water supply locations and wells help sustain malaria transmission by serving as sources of anophelines where people aggregate. There was a strong association between larval production and adult emergent densities (r = 0.365, P = 0.011). The results of this study further show that implementation of larval control strategies in the study villages significantly reduced vector productivity as measured by both larval (F = 24.919, df = 1,178, P < 0.001) and adult An. arabiensis densities (F = 3.052, df = 1,119, P = 0.014) in the treated sites over the 24-month study period. The results of this semiarid larval management model suggests that 1) larval management backed by habitat identification, mapping, and surveillance is a feasible tactic for managing malaria vectors, 2) a special focus in such semiarid ecosystems should be targeted to the highly productive larval habitats along stream beds and others of periodic importance derived from human activities, and 3) public information and sensitization of communities to participate in controlling the pre-adult stages of anopheline mosquitoes is central for success.
Authors:
Josephat Shililu; Charles Mbogo; Tewolde Ghebremeskel; John Githure; Robert Novak
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The American journal of tropical medicine and hygiene     Volume:  76     ISSN:  0002-9637     ISO Abbreviation:  Am. J. Trop. Med. Hyg.     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-26     Completed Date:  2007-02-28     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  0370507     Medline TA:  Am J Trop Med Hyg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  103-10     Citation Subset:  AIM; IM    
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), Nairobi, Kenya; Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya. jshililu@icipe.org
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MeSH Terms
Descriptor/Qualifier:
Animals
Anopheles / physiology*
Ecosystem*
Eritrea
Larva / physiology
Population Dynamics
Seasons
Grant Support
ID/Acronym/Agency:
U01 AI54889/AI/NIAID NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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