Loss of household protection from use of insecticide-treated nets against pyrethroid-resistant mosquitoes, benin.

Loss of household protection from use of insecticide-treated nets against pyrethroid-resistant mosquitoes, benin.
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DOI:
10.3201/eid1807.120218
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发表时间:
2012-07
影响因子:
11.8
通讯作者:
Rowland M
Rowland M
中科院分区:
医学2区
文献类型:
--
作者:
Asidi A;N'Guessan R;Akogbeto M;Curtis C;Rowland M

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恢复保护需要结合拟除虫菊酯和新型杀虫剂的创新。对拟除虫菊酯的抗药性在冈比亚按蚊中越来越普遍,与非洲各地扩大使用驱虫蚊帐相吻合。为了调查使用中的蚊帐是否仍然具有保护作用,我们在贝宁的北方和南方进行了家庭试验,那里的安。冈比亚蚊子分别对拟除虫菊酯敏感和具有抗药性。房间里安装了窗户陷阱,并在蚊帐用拟除虫菊酯处理前后监测蚊子叮咬和存活率。在有抗药性蚊子的地方睡在驱虫蚊帐下并不比睡在未经处理的蚊帐下更具保护性,无论其身体状况如何。相比之下,在易受蚊子叮咬的地方睡在ITN下的几率降低了66%。一旦蚊子产生抗药性,驱虫蚊帐就会出现漏洞,几乎或根本无法提供保护。抗药性严重威胁到以驱虫蚊帐为基础的疟疾控制战略。
Restoring protection requires innovation combining pyrethroids and novel insecticides. Pyrethroid resistance is becoming widespread in Anopheles gambiae mosquitoes, coinciding with expanded use of insecticide-treated nets (ITNs) throughout Africa. To investigate whether nets in use are still protective, we conducted household trials in northern and southern Benin, where An. gambiae mosquitoes are susceptible and resistant, respectively, to pyrethroids. Rooms were fitted with window traps and monitored for mosquito biting and survival rates before and after the nets were treated with pyrethroid. Sleeping under an ITN in the location with resistant mosquitoes was no more protective than sleeping under an untreated net, regardless of its physical condition. By contrast, sleeping under an ITN in the location with susceptible mosquitoes decreased the odds of biting by 66%. ITNs provide little or no protection once the mosquitoes become resistant and the netting acquires holes. Resistance seriously threatens malaria control strategies based on ITN.
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