Spray Application Of Bacillus Thuringiensis Israelensis (Bti Strain Am65-52) Against Aedes Aegypti (L.) And Ae. Albopictus Skuse Populations And Impact On Dengue Transmission In A Dengue Endemic Residential Site In Malaysia

Tan, A.W.A. and Loke, S.R. and Benjamin, S. and Lee, H.L. and Chooi, K.H. and Sofian-Azirun, Mohd (2012) Spray Application Of Bacillus Thuringiensis Israelensis (Bti Strain Am65-52) Against Aedes Aegypti (L.) And Ae. Albopictus Skuse Populations And Impact On Dengue Transmission In A Dengue Endemic Residential Site In Malaysia. Southeast Asian Journal of Tropical Medicine and Public Health, 43 (2). pp. 296-310. ISSN 0125-1562

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Abstract

A one year study was conducted to evaluate the impact of spray application of Bacillus thuringiensis israelensis (Bti), strain AM65-52 on vector populations and dengue transmission in a dengue endemic state in Malaysia. Residential sites with similar populations of Aedes aegypti (L.) and Aedes albopictus Skuse were studied. One site was treated with spray application of Bti into all outdoor target vector habitats, which consisted of natural and artificial containers. The other site was not treated. The impact of spray application was measured with an indoor and outdoor ovitrap index (00 and epidemiologic data. Significant reductions in both Ae. aegypti and Ae. albopictus, OI were observed both indoors and outdoors, in treated sites compared to untreated sites (p<0.05). 01 reduction was achieved over time in the treated area. The CH was suppressed to below 10. This was maintained for 4 weeks into the post-treatment phase. The outdoor CH at the untreated site remained at more than 40 for 38 weeks during the evaluation period. One dengue case occurred at the Bti treatment site at the beginning of the treatment phase, but no further cases were detected during the remainder of the treatment phase. However, there was an ongoing dengue outbreak in the untreated area with 15 serologically confirmed cases during weeks 37-54. Intensive fogging operations with pyrethroids at the untreated (Bti) site had a positive impact on Ae. albopictus, but not on Ae. aegypti.

Item Type: Article
Uncontrolled Keywords: *Aedes Animals *Bacillus thuringiensis Chi-Square Distribution Dengue/epidemiology/*prevention & control/transmission Endemic Diseases Humans Insect Vectors Insecticides/*pharmacology Malaysia/epidemiology Mosquito Control/*methods
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: miss munirah saadom
Date Deposited: 14 Jan 2013 02:35
Last Modified: 04 Dec 2019 09:05
URI: http://eprints.um.edu.my/id/eprint/5821

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