ENTOMOLOGICAL EVALUATION OF COMMUNITY-WIDE USE OF LAMBDACYHALOTHRIN-IMPREGNATED BED NETS AGAINST MALARIA IN A BORDER AREA OF NORTH-WEST THAILAND
ENTOMOLOGICAL EVALUATION OF COMMUNITY-WIDE USE OF LAMBDACYHALOTHRIN-IMPREGNATED BED NETS AGAINST MALARIA IN A BORDER AREA OF NORTH-WEST THAILAND
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DOI：
10.1016/0035-9203(95)90525-1
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发表时间：
1995-05-01
影响因子：
2.2
通讯作者：
KHAMBOONRUANG, C
中科院分区：
文献类型：
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作者：
SOMBOON, P;LINES, J;KHAMBOONRUANG, C
本文报道了2项研究。(i)经过一年的基线数据收集，在泰国西北部5个村庄中的3个村庄使用了经氯氰菊酯处理的蚊帐，其余2个村庄使用安慰剂处理。每个村每月2晚采集人饵，每年8个月，比较第一年和第二年的咬人密度。处理后的蚊帐对沙纹按蚊和斑纹按蚊种群密度和产卵率无显著影响。由于捕获数量少，对大毒弧菌的检测结果尚无定论。在3个处理村中，只有1个处理村的A小蠓叮咬率和产卵率显著降低，处理组与对照组之间无总体差异。然而，试验受到村民洗蚊帐和再怀孕率低的影响。（ii）一项短期研究采用交叉设计，涉及3个村庄，持续48 d。在前24 d， 2个村庄的居民获得新的处理过的蚊帐，而另外2个村庄保留他们自己的未经处理的蚊帐。在第二个24天，这种情况发生了逆转。每日捕光结果显示，在使用蚊帐和未使用蚊帐的时间段内，小蠓A种的室内密度和产卵率无显著差异。这两项研究，特别是第二项研究表明，在社区范围内使用处理过的蚊帐通常不会降低该地区病媒的传播能力，这可能是因为蚊子的叮咬行为
This paper reports 2 studies. (i) After a year of baseline data collection, lambdacyhalothrin-treated bed nets were introduced into 3 of 5 villages in north-west Thailand, the remaining 2 being treated with placebo. Human bait collections were carried out in each village on 2 nights per month, for 8 months of each year, and the biting densities were compared between the first year and the second year. The treated bed nets did not have any significant impact on the density or parous rates of Anopheles sawadwongporni and A. maculatus s.s. populations. The results for A. dirus s.l. were not conclusive because of the low number caught. Significant reductions in biting and parous rates of A. minimus species A were observed in only one of the 3 treated villages, and there was no overall difference between treated and control groups. However, the trial suffered from the washing of nets by villagers and the low rate of reimpregnation. (ii) A short-term study involved 3 villages in a cross-over design, and lasted 48 d. For the first 24 d, residents of 2 villages were given new treated nets while the other 2 villages retained their own untreated nets. For the second 24 d, this situation was reversed. Daily light-trapping revealed no significant difference in the indoor densities or parous rates of A. minimus species A between the periods with treated or untreated nets. Both studies, especially the second, suggested that the community-wide use of treated bed nets did not generally reduce the vectorial capacity of vectors in this area, probably because of the biting behaviour of the mosquitoes