Bacterial Larvicide, Bacillus thuringiensis israelensis Strain AM 65-52 Water Dispersible Granule Formulation Impacts Both Dengue Vector, Aedes aegypti (L.) Population Density and Disease Transmission in Cambodia

A multi-phased study was conducted in Cambodia from 2005-2011 to measure the impact of larviciding with the bacterial larvicide, Bacillus thuringiensis israelensis (Bti), a water dispersible granule (WG) formulation on the vector, Aedes aegypti (L.) and the epidemiology. In our studies, all in-use c...

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Bibliographic Details
Published in:PLoS neglected tropical diseases 2016-09, Vol.10 (9), p.e0004973-e0004973
Main Authors: Setha, To, Chantha, Ngan, Benjamin, Seleena, Socheat, Doung
Format: Article
Language:English
Subjects:
Aedes - growth & development
Analysis
Animals
Bacillus thuringiensis - physiology
Biology and Life Sciences
Cambodia
Care and treatment
Dengue - prevention & control
Dengue fever
Dengue virus
Development and progression
Disease prevention
Disease transmission
Drug Resistance
Ecosystem
Family Characteristics
Funding
Households
Humans
Insect Vectors
Insecticides
Malaria
Medical research
Medicine and Health Sciences
Mosquito Control - methods
Mosquitoes
Parasitology
People and Places
Physical Sciences
Population Density
Prevalence studies (Epidemiology)
Pupa - growth & development
Risk factors
Seasons
Studies
Surveys and Questionnaires
Temefos
Tropical diseases
Water Microbiology
Wind
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Summary:A multi-phased study was conducted in Cambodia from 2005-2011 to measure the impact of larviciding with the bacterial larvicide, Bacillus thuringiensis israelensis (Bti), a water dispersible granule (WG) formulation on the vector, Aedes aegypti (L.) and the epidemiology. In our studies, all in-use containers were treated at 8 g/1000 L, including smaller containers and animal feeders which were found to contribute 23% of Ae aegypti pupae. The treated waters were subjected to routine water exchange activities. Pupal production was suppressed by an average 91% for 8 weeks. Pupal numbers continued to remain significantly lower than the untreated commune (UTC) for 13 weeks post treatment in the peak dengue vector season (p50% of the household in the UTC harbored ≥11 mosquitoes per home. The adult population continued to remain at significantly much lower numbers in the Bti treated commune than in the UTC for 10-12 weeks post treatment (p
ISSN:1935-2735
1935-2727
1935-2735
DOI:10.1371/journal.pntd.0004973