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Publication Details
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Tan Swee Beng, Indra Vythilingam and Lee Han Lim (2014). Bioefficacy of a long-lasting insecticide impregnated net on blood feeding inhibition of Anopheles maculatus theobald and Culex quinquefasciatus Say. Southeast Asian Journal of Tropical Biomedicine and Public Health 45(3): 598-609

Abstract :

This study aimed to evaluate the bioefficacy and blood feeding inhibition of mosquitoes under laboratory conditions using the WHO tunnel test method on unwashed and washed long-lasting insecticide impregnated net with extrinsic heat treatment of 30 0C followed by 80 0C on the same net during washing. PermaNet exhibited fairy high durability to washing (5 washes) and had fairy long-lasting bioefficacy against Anopheles maculatus for blood feeding inhibition on both unwashed (39 months) and washed (26 months) nets. However, Perma-Net exhibited lower bioefficacy against Culex quinquefasciatus. This study also suggested that the application of extrinsic heat treatment of 30 0C followed by an increased heat at 80 0C  on the same net exerted significant differences (p < 0.05) in mortality of both An. maculatus and Cx. quinquefasciatus. However, extrinsic heat treatment did not enhance any significant increase in blood feeding inhibition of both An. maculatus and Cx. quinquefasciatus (p > 0.05). An. maculatus exhibited significant differences in resting preference after a successful blood meal, as more blood-fed and live females preferred to rest and stay near the bait in the mouse cage, and more dead and unfed females were found in the outer cage of both the unwashed and washed nets (p < 0.05). Conversely, fully blood-fed and live Cx. quinquefasciatus females did not show any resting preference between the mouse cage and outer cage, but there were more dead and unfed females in the mouse cage of both the unwashed and washed nets (p < 0.05).




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