Alexander B, Usma M C, Cadena H, Quesada B L, Solarte Y, Roa W, Travi B L
Fundación Centro Internacional de Entrenamiento e Investigaciones Médicas, Cali, Colombia.
Med Vet Entomol. 1995 Jul;9(3):279-83. doi: 10.1111/j.1365-2915.1995.tb00134.x.
The effectiveness of bednets and curtains (nylon mesh 64 per cm2) impregnated with deltamethrin at 26 mg a.i./m2 in reducing the biting nuisance caused by three phlebotomine sandfly species: Lutzomyia columbiana, Lu.lichyi and the predominant Lu.youngi (Diptera: Psychodidae), was evaluated at La Guaira, a rural settlement in Valle de Cauca near Cali, Colombia. Pairs of volunteers collected sandflies under impregnated bednets, in rooms protected by impregnated curtains or in unprotected rooms in a randomized matched design. Collections were made in three houses per night on three consecutive nights, so that each house was sampled under each of the three treatments. This routine was repeated at 2-week intervals for 6 months. There was no significant difference between the overall numbers of sandflies collected in rooms with or without impregnated curtains. Only 0.14 sandflies/man-hour were caught on human bait under impregnated bednets, significantly fewer than the numbers collected on human bait outside the nets in the same room (1.91) or in unprotected rooms (3.29). In a second set of experiments carried out in La Guaira and the neighbouring community of Jiguales, the effect of deltamethrin impregnation was evaluated by comparing numbers of sandflies collected on human bait under treated and untreated nets. Significantly fewer were collected under the impregnated nets (0.25 v. 0.69/man-hour). Wild-caught female Lu.youngi exposed to treated netting for 2 min in the laboratory all died with 24 h. The impact of deltamethrin-impregnated bednets was considered to be useful against Lu.youngi and other potential vectors of leishmaniasis in such communities.
在哥伦比亚卡利附近考卡山谷的一个乡村定居点拉瓜伊拉，评估了用26毫克有效成分/平方米溴氰菊酯浸渍的蚊帐和窗帘（每平方厘米64目尼龙网）对三种白蛉：哥伦比亚白蛉、利氏白蛉和占主导地位的扬氏白蛉（双翅目：毛蠓科）叮咬骚扰的减少效果。成对的志愿者以随机配对设计，在浸渍蚊帐下、由浸渍窗帘保护的房间内或未受保护的房间内收集白蛉。连续三个晚上，每晚在三所房屋中进行收集，以便每所房屋在三种处理方式下都被采样。这个程序每隔两周重复一次，持续6个月。有浸渍窗帘的房间和没有浸渍窗帘的房间收集到的白蛉总数没有显著差异。在浸渍蚊帐下，每人工时仅捕获0.14只白蛉，明显少于在同一房间蚊帐外（1.91只）或未受保护房间（3.29只）在人饵上捕获的数量。在拉瓜伊拉和邻近的吉瓜莱斯社区进行的第二组实验中，通过比较在处理过和未处理过的蚊帐下人饵上收集的白蛉数量，评估了溴氰菊酯浸渍的效果。在浸渍蚊帐下收集到的白蛉明显较少（每人工时0.25只对0.69只）。在实验室中，野生捕获的扬氏白蛉雌虫暴露在处理过的蚊帐中2分钟，24小时内全部死亡。溴氰菊酯浸渍蚊帐被认为对这类社区中的扬氏白蛉和其他潜在的利什曼病传播媒介有效。
