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Free Content Effectiveness of dengue control practices in household water containers in Northeast Thailand

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Summary Objective 

To investigate the influence of larval control methods (using temephos, keeping fish and covering containers with lids), water use and weekly cleaning of containers on the presence of Aedes aegypti larvae in water-storage containers in rural and urban households in Khon Kaen province. Method 

Cross-sectional questionnaire survey and larval survey covered 966 households and 5821 containers were inspected. Result 

In rural and urban areas larval control was patchy and often ineffective. Consequently, the mosquito indices exceed the target indices for dengue control with the Breteau Indices of 201 and 113, and Container Indices of 25 and 28 in rural and urban areas, respectively. The containers most frequently infested with larvae were rectangular cement containers storing water for bathing (rural: 37.2%; urban: 35%) and flushing the toilets (rural: 35.7%; urban: 34.3%). Keeping fish [adjusted odds ratio (AOR): 0.08–0.16] was the most effective methods of control. Correctly covering containers with lids was similarly effective (AOR: 0.10–0.25) when used on jars for storing drinking water. However, frequent use of containers reduced the effectiveness of lids. Temephos was effective only in dragon jars in urban areas (AOR: 0.46) where a standard package of temephos were available. Weekly cleaning of containers was an effective method for larval control in most types of containers. A combination of control methods increased effectiveness. Conclusion 

This study highlights the complex interaction of household water use and larval control practices as well as the importance of determining the most effective control measures compatible with water practices for implementing control promotion.
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Keywords: DHF; Khon Kaen; Thailand; dengue; household; larval control

Document Type: Research Article

Affiliations: 1: Tropical Health Program, School of Population Health, University of Queensland, Herston, Australia 2: Papua New Guinea Institute of Medical Research, Goroka, Papua New Guinea

Publication date: 2005-08-01

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