Laboratory Evaluation of Controlled-release Repellent Treated Pulp Fabric on Human Volunteers Against Mosquito Vectors |
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Authors: | Won- Ja LEE Hoe-Sun LEE Young- Joon AHN Dong-Kyu LEE |
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Institution: | Division of Medical Zoology, National Institute of Health, Seoul, Korea;;Biotechnology and Institute of Agricultural Science &Technology, Chonbuk National University, Chonju 561- 756, Korea;;School of Agricultural Biotechnology, Seoul National University, Seoul 151-742, Korea;Department of Biological Sciences, Kosin University, Busan 606- 701, Korea |
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Abstract: | Three controlled‐release personal‐use pulp fabric impregnated insect repellent formulations of 5% N, N‐diethyl‐3‐methylbenzamide (DEET), and 10% and 15% neem oils were evaluated in an environmental chamber on volunteers for their repellent efficacy against three mosquito species, Culex pipiens pallens, Aedes aegypti and Ochlerotatus togoi. The 5% DEET formulation showed significant repellency in pulp fabric (5 mm in width) against Culex pipiens pallens and Aedes aegypti (P < 0.05), providing an average repellency of 88.0%, 66.3%, and 46.8% of Cx. pipiens pallens, Ae. Aegypti and O. togoi bites, respectively, during the 6 hours of exposure period. Against night‐biting mosquitoes Cx. pipiens pallens, the DEET formulation provided mostly complete protection for at least 4 hours after the application. In pulp fabric of 10 mm in width, the 5% deet formulation showed significantly the highest repellency among the repellents against O. togoi (P<0.05), providing an average repellency of 52.3% during the 6 hours of exposure period. However, the pulp fabrics treated with 10% and 15% neem oil were less effective than 5% DEET against three mosquito species. This study demonstrated the potential of 5% DEET as pulp fabric repellent against both day‐ and night‐biting mosquitoes. |
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Keywords: | Repellent Mosquito Pulp fabric Evaluation deet |
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