Residual insecticidal activity of long-lasting deltamethrin-treated curtains after 1 year of household use for dengue control

V Vanlerberghe, Y Trongtokit, L Cremonini, S Jirarojwatana, C Apiwathnasorn, P Van der Stuyft

    Research output: Contribution to journalA1: Web of Science-article

    Abstract

    Summary Objective To evaluate the residual insecticidal activity of the PermaNet((R)) curtains on Aedes aegypti after 1 year of use in Thai households and to assess the influence of sun and dust exposure, washing practices and detergent use. Methods We sampled UV-protected PermaNet((R)) curtains made of a long-lasting deltamethrin-[55 mg/m(2)] treated polyester netting, before (10 curtains) and after 8 (10 curtains) and 12 months (66 curtains) of household use in a field site in Chon Buri, Thailand. We assessed the residual insecticidal activity of the curtains by standard WHO bioassay, using a deltamethrin-susceptible insectarium Aedes aegypti strain. Results Mosquito mortality was 100% before distribution, 100% at 8 months and 98.2% (95% CI 97.9-98.5) at 12 months of use. Sunlight, hand-washing and detergent use had no effect on the residual insecticidal activity after 12 months. However, the mosquito survival rate increased by a factor of 6.4 (95% CI 3.5-11.8) on machine-washed curtains and by a factor of 2.0 (95% CI 1.4-2.9) on curtains not covered by dust. Conclusion The residual insecticidal activity of PermaNet(R) curtains remains high after 12 months use under field conditions
    Original languageEnglish
    JournalTropical Medicine and International Health
    Volume15
    Issue number9
    Pages (from-to)1067-1071
    Number of pages5
    ISSN1360-2276
    DOIs
    Publication statusPublished - 2010

    Keywords

    • B780-tropical-medicine
    • Viral diseases
    • Dengue
    • Vectors
    • Aedes aegypti
    • Vector control
    • Impregnated curtains
    • Deltamethrin
    • Insecticides
    • Long-lasting
    • Assessment
    • Use
    • Mortality
    • Thailand
    • Asia-Southeast

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