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首页> 外文期刊>BMC research notes >Bio-efficacy of deltamethrin based durable wall lining against wild populations of Anopheles gambiae s.l. in Northern Tanzania
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Bio-efficacy of deltamethrin based durable wall lining against wild populations of Anopheles gambiae s.l. in Northern Tanzania

机译：基于溴氰菊酯的耐久墙衬砌对冈比亚按蚊野生种群的生物功效。在坦桑尼亚北部

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BackgroundIndoor residual spraying (IRS) is one of the preferred tools used for control of malaria in many settings in the world. However, this control tool still faces challenges that include lack of long lasting active ingredient, limited number of well-trained personal, and need of repeated treatment which increases operational costs and reduces acceptability by residents. As a result there is need to develop and validate other methods which can complement the existing controls. The current study compared the bio-efficacy of durable wall lining (DL) (treated with deltamethrin 265?mg/m2) and IRS (with deltamethrin 5% WP at 20?mg/m2) on indoor mosquitoes densities and biting behaviour of mosquitoes in comparison with control houses without either DL or IRS. MethodsA study with two treatment arms and a control was conducted in Magugu ward, Northern Tanzania. Overall, a total of 60 houses were selected for the study with 20 houses per treatment arm and control. From each arm and control five houses were selected for mosquitoes trapping. Mosquitoes were sampled from 18:00 to 07:00 hourly every month for a period of 6?months. Mosquitoes were sampled using CDC miniature light traps. ResultsA total of 14,400 female wild mosquitoes were used for contact bioassays in the control arm. 20 houses were sprayed, additionally walls of 20 houses were installed with wall liners, and walls of 20 unsprayed houses were used as control. Also, a total of 946 mosquitoes were sampled with traps in 60 houses during the hourly sampling for 6?months. A total of 3000 unfed females of An. gambiae s.l. wild population raised from larvae were collected from natural habitats in the same village for bioassays. The decline in indoor mosquitoes densities observed in this study did not lead to a shift in the biting cycles ( P =?0.712). The number of mosquitoes caught indoors in houses with DL and IRS was significantly lower ( P P =?0.021). In the DL installed houses, indoor mosquito density declined notably and sustained throughout the 6?months of the study. However, in those houses sprayed with deltamethrin 5% WP (PALI?5 WP), the density noted to start to increase within four months after spraying(do you mean to say that the densities declined up to 4?months post spraying and thereafter increased. ConclusionsConsidering the efficacy duration of DL against IRS with deltamethrin 5% WP on mosquito densities decline indoors. The results of this study suggest that DL is more effective in malaria control as its efficacy lasted more than that of IRS.
机译：背景技术室内残留喷雾（IRS）是世界上许多环境中用于控制疟疾的首选工具之一。然而，这种控制工具仍然面临挑战，包括缺乏持久的有效成分，训练有素的个人数量有限以及需要重复治疗，这增加了运营成本并降低了居民的接受度。结果，需要开发和验证可以补充现有控件的其他方法。目前的研究比较了耐久壁衬里（DL）（用溴氰菊酯265？mg / m 2 处理）和IRS（用溴氰菊酯5％WP在20？mg / m 处理）的生物功效2 ）与没有DL或IRS的控制室相比，室内蚊子的密度和蚊子的咬咬行为。方法在坦桑尼亚北部的马古古病房进行了两个治疗臂和一个对照的研究。总体而言，总共选择了60所房屋进行研究，每个治疗组和对照组20所房屋。从每个手臂和控制区中选择了五间用于诱捕蚊子的房屋。每月从每小时18:00到07:00采样蚊子，持续6个月。使用CDC微型光阱对蚊子进行采样。结果在对照组中总共使用了14,400只雌性野生蚊子进行接触生物测定。喷涂了20栋房屋，另外在20栋房屋的墙壁上安装了墙衬，并以20栋未喷涂房屋的墙壁作为对照。此外，在每小时采样6个月的时间里，总共有946个蚊子在60个房屋中用诱捕器采样。总共有3000位未喂养的雌性雌性。冈比亚有限公司从同一个村庄的自然栖息地收集由幼虫引起的野生种群进行生物测定。在这项研究中观察到的室内蚊子密度的下降并没有导致咬合周期的变化（P =？0.712）。患有DL和IRS的房屋中在室内捕获的蚊子数量显着降低（P P =？0.021）。在DL安装的房屋中，室内蚊子密度显着下降，并在研究的6个月内持续保持。但是，在喷洒了溴氰菊酯5％WP（PALI？5 WP）的房屋中，密度在喷洒后四个月内开始增加（您是说密度在喷洒后的4个月内下降并随后增加）。结论考虑到DL对5％溴氰菊酯对IRS的药效持续时间在室内下降，这项研究的结果表明DL在控制疟疾方面更有效，因为它的药效比IRS更持久。

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