Vector abundance and malaria transmission in rice-growing villages in Mali
Vector abundance and malaria transmission in rice-growing villages in Mali
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DOI：
10.4269/ajtmh.2005.72.725
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发表时间：
2005-06-01
影响因子：
3.3
通讯作者：
Taylor, CE
中科院分区：
文献类型：
--
作者：
Diuk-Wasser, MA;Toure, MB;Taylor, CE
人们很早就认识到了没有疟疾的按蚊现象。在大型灌溉项目中，如马里尼奥诺周围的项目，灌溉地区的村庄有时比邻近的非灌溉村庄有更多的疟疾按蚊媒介。但总体上疟疾流行率要低得多。对此的一个假设解释是，高密度的按蚊导致较小的成虫，他们活得不那么长，因此传播疾病的效率较低。我们分析了从马里灌区的18个村庄收集的一系列数据，测量了蚊子密度与存活率、嗜动物率以及不同村庄和时间的媒介能力之间的相关性。成虫密度与人类活动和成虫存活率呈负相关，在低密度时与媒介能力呈正相关。中等密度时为平坦，高密度时为负值。这可能在一定程度上解释了为什么疟疾流行率在按蚊密度较高的灌溉村庄很低。
Anophelism without malaria has long been recognized. In large irrigation projects, such as that around Niono, Mali, villages in irrigated areas sometimes have more anopheline vectors of malaria than adjacent nonirrigated villages. but overall malaria prevalence is substantially less. One hypothesized explanation for this is high anopheline densities lead to smaller adults, who do not live so long and hence are less efficient at transmitting the disease. We analyzed serial collections from 18 villages in an irrigated area of Mali, measuring correlations between mosquito densities and survival rates, zoophilic rates, and vectorial capacity over the villages and times. Adult density was inversely related to anthropophily and adult survival and its relationship with vectorial capacity was positive at low mosquito densities. flat at intermediate densities, and negative at high densities. This may partly explain why malaria prevalence is low in irrigated villages with high Anopheles density.