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Title: Control of mosquito vectors of tropical infectious diseases: (2) Pyrethroid susceptibility of Aedes aegypti (L.) collected from different sites in Thailand
Authors: Yoshio Katsuda
Somjai Leemingsawat
Supatra Thongrungkiat
Samreng Prummonkol
Yudthana Samung
Tsutomu Kanzaki
Tomoe Watanabe
Tomoko Kahara
Research and Development Laboratory
Mahidol University
Dainihon Jochugiku Co., Ltd.
Keywords: Medicine
Issue Date: 1-Mar-2008
Citation: Southeast Asian Journal of Tropical Medicine and Public Health. Vol.39, No.2 (2008), 229-234
Abstract: Four strains (SS, BS, A and B) of Aedes aegypti collected from different sites in Bangkok and at different times were examined for their pyrethroid susceptibility. Mosquito coils containing dl, d-T80-allethrin, d, d-T-prallethrin and methoxymethyl-tetrafluorobenzyl tetramethyl- cyclopropanecarboxylate (K-3050) with or without a synergist were tested by the 25 m3 semi-field test method. One strain (SS) was the most susceptible with KT50 values of about <30 minutes for all mosquito coils, while the other three strains (BS, A and B) were found to be around 10 to 20 times more tolerant to pyrethroids than the SS strain. A similar tendency for the pyrethroid susceptibility of the four strains was obtained with tests by topical application method. In field efficacy tests, mosquito coils with d, d-T-prallethrin 0.20% plus N-(2-ethylhexyl)bicycle-[2,2,1]-hept-5- ene-2,3-dicarboxyimide as a synergist exhibited a repellent effect of about 85%, while those with K-3050 0.10% plus the synergist exhibited a greater repellent effect of about 90%.In contrast, the repellent effect of commercial dl, d-T80-allethrin 0.20% coils was as low as about 50%. The d, d-T-prallethrin and K-3050 coils with the synergist were confirmed to be highly effective in repelling Ae. aegypti.
ISSN: 01251562
Appears in Collections:Scopus 2006-2010

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