Comparison of schistosome transmission in a single- and a double-cropped area in the rice irrigation scheme, 'Office du Niger', Mali
Comparison of schistosome transmission in a single- and a double-cropped area in the rice irrigation scheme, 'Office du Niger', Mali
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DOI：
10.1016/j.actatropica.2004.02.008
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发表时间：
2004-06-01
期刊：
影响因子：
2.7
通讯作者：
Keita, S
中科院分区：
文献类型：
--
作者：
Coulibaly, G;Diallo, M;Keita, S
大米作为西非的主食变得越来越重要，需要增加产量以满足需求，实现这一目标的方法之一是收获两种一年生作物。这种强化灌溉可能会影响血吸虫的传播，本研究试图比较马里“Office du Niger”灌溉计划的单季和双季地区的血吸虫传播。 Niono 地区已经实行双季作物多年，而 Kolongotome 地区仍然只种植单一作物。对 10 个村庄（这 2 个地区各 5 个）进行的寄生虫学调查显示，单熟地区的埃及血吸虫发病率低于双熟地区。为了比较两个地区之间的传播模式，确定了四个村庄（每个地区两个）周围的所有人类与水接触的地点，并将其纳入传播研究中。从1996年8月到1997年6月，在每个地点进行了8次调查，间隔大约45天，记录中间宿主的密度、受感染钉螺的密度、环境因素（特别是水生植物的密度）以及人与水接触的频率。尽管这些数据提供了有关尼奥诺和科隆戈托莫地区传播模式的有用信息，但它们未能证明两个地区之间蜗牛种群动态和传播模式的明显差异。这两个地区的蜗牛栖息地的一个关键因素是丰富的水生植物，尤其是沉水物种。使用环境改造来控制蜗牛应重点控制人类与水接触地点的这些植物。 (C) 2004 Elsevier B.V. 保留所有权利。
Rice is becoming increasingly important as a staple food in West Africa and there is a need to increase production to meet the demand and one way to achieve this is to harvest two annual crops. It is possible that such intensified irrigation could affect transmission of schistosomes and this study attempts to compare schistosome transmission in single and double-cropped areas of an irrigation scheme, 'Office du Niger', in Mali. Double cropping has been practised for some years in the Niono area while in the Kolongotome area still only a single crop is grown. Parasitological surveys conducted in 10 villages (5 from each of these 2 areas) showed that Schistosoma haematobium was less prevalent in the area with single cropping than in the area with double cropping. In order to compare transmission patterns between the two areas, all human-water contact sites around four villages (two from each area) were identified and included in transmission studies. From August 1996 to June 1997, eight surveys were conducted, at intervals of approximately 45 days, in each of these sites to record density of the intermediate hosts, density of infected snails, environmental factors (especially density of aquatic macrophytes), and frequency of human-water contacts. Although the data provide useful information on transmission patterns in Niono and Kolongotomo areas, they fail to demonstrate clear-cut differences in snail population dynamics and transmission patterns between the two areas. A key element in snail habitats in both areas is the abundance of aquatic macrophytes, especially the submerged species. Snail control using environmental modification should focus on controlling these plants in human-water contact sites. (C) 2004 Elsevier B.V. All rights reserved.