Lindsay S W, Alonso P L, Armstrong Schellenberg J R, Hemingway J, Adiamah J H, Shenton F C, Jawara M, Greenwood B M
Medical Research Council Laboratories, Fajara, Banjul, The Gambia.
Trans R Soc Trop Med Hyg. 1993 Jun;87 Suppl 2:45-51. doi: 10.1016/0035-9203(93)90175-p.
The impact of permethrin-impregnated bed nets on malaria vectors was studied in 6 pairs of villages during the rainy season in 1989. In each pair, the residents of one village had their nets treated whilst those of the other remained untreated. Routine collections of mosquitoes were made outdoors in the early evening using human-biting collections, and indoors with insecticide sprays, light traps and by searches under bed nets. Mosquitoes of the Anopheles gambiae complex, An. gambiae sensu stricto, An. arabiensis and An. melas, were present in large numbers for 5 months of the study period. These mosquitoes were susceptible to permethrin as judged by bioassay results. Outdoor human-biting rates in the early evening in communities with treated bed nets were similar to those in communities with untreated nets. In villages with treated bed nets most biting occurred outdoors in the early evening with little taking place under impregnated nets. The insecticidal activity of permethrin-impregnated bed nets, dipped by the local population, provided good individual protection against mosquitoes throughout the rainy season and bed nets remained effective even when washed up to 3 times. There was little to suggest that the use of insecticide-treated nets reduced the survival of mosquito populations in villages with impregnated nets. The absence of the expected village-wide effects of net impregnation may have resulted from the circulation of mosquitoes between villages with treated and untreated nets. The proportion of mosquitoes which fed on humans did not differ significantly between villages with treated and untreated nets.(ABSTRACT TRUNCATED AT 250 WORDS)
1989年雨季期间，在6对村庄中研究了氯菊酯浸蚊帐对疟疾病媒的影响。在每一对村庄中，一个村庄的居民的蚊帐经过处理，而另一个村庄的居民的蚊帐则未处理。傍晚时分在户外使用人饵诱捕法常规收集蚊子，在室内使用杀虫剂喷雾、诱虫灯，并在蚊帐下搜索来收集蚊子。在研究期间的5个月里，冈比亚按蚊复合体、冈比亚按蚊指名亚种、阿拉伯按蚊和梅拉斯按蚊数量众多。根据生物测定结果判断，这些蚊子对氯菊酯敏感。使用处理过蚊帐的社区傍晚时分户外人饵诱捕率与未处理蚊帐的社区相似。在使用处理过蚊帐的村庄，大多数叮咬发生在傍晚户外，在浸药蚊帐下很少发生。当地居民浸泡的氯菊酯浸蚊帐的杀虫活性在整个雨季为个人提供了良好的防蚊保护，即使清洗多达3次，蚊帐仍然有效。几乎没有迹象表明使用杀虫剂处理过的蚊帐会降低浸药蚊帐村庄中蚊子种群的存活率。浸药蚊帐没有产生预期的全村范围效果，可能是因为处理过和未处理过蚊帐的村庄之间有蚊子流通。处理过和未处理过蚊帐的村庄中以人类为食的蚊子比例没有显著差异。（摘要截选至250字）
