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首页> 外文期刊>Parasitology >Hydrological modelling of snail dispersal patterns in Msambweni, Kenya and potential resurgence of Schistosoma haematobium transmission.
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Hydrological modelling of snail dispersal patterns in Msambweni, Kenya and potential resurgence of Schistosoma haematobium transmission.

机译：肯尼亚Msambweni蜗牛扩散模式的水文模拟和血吸虫血吸虫病传播的潜在复发。

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摘要

Urinary schistosomiasis is an important source of human morbidity in Msambweni, Kenya, where the intermediate host snail, Bulinus nasutus is found in ponds and water pools. In the past, aquatic habitats in the area have been studied separately; however, recent collections of B. nasutus snails and shells indicated that many of these ponds are in fact connected during and following sufficient rains. Satellite imagery and a geographical information system (GIS) were used to survey the main water courses and potential drainage routes, to locate potential source populations of snails and to determine probable snail dispersal routes. The 2 water bodies implicated as being the most important Schistosoma haematobium transmission foci in the area were found to differ in their degree of connectivity to other B. nasutus source habitats. One pond becomes connected even after normal rains, while the other pond requires prolonged rains or flooding to become connected with source habitats. Consequently, the transmission foci differ in their susceptibility to snail population control measures. Spatially explicit dispersal models that consider the spatial and temporal patterns of connectivity between aquatic habitats will contribute to improved snail surveillance and more focused control for urinary schistosomiasis at a local level.
机译：尿液血吸虫病是肯尼亚Msambweni地区人类发病的重要来源，那里的中间宿主蜗牛Bulinus nasutus在池塘和水池中发现。过去，对该地区的水生生境进行过单独研究;然而，最近收集的纳索氏杆菌蜗牛和贝壳表明，实际上在降雨充足之后，这些池塘中的许多都是相连的。卫星图像和地理信息系统（GIS）用于调查主要水道和潜在的排水路线，以定位潜在的蜗牛种群，并确定可能的蜗牛扩散路线。发现这2个水体是该地区最重要的血吸虫血红蛋白传播病源，它们在与其他纳豆芽孢杆菌源生境的连通程度上有所不同。即使正常下雨后，一个池塘仍会连通，而另一个池塘需要长时间下雨或洪水才能与源生境相连。因此，传播焦点对蜗牛种群控制措施的敏感性不同。考虑水生生境之间连通性的时空分布的空间显式分散模型将有助于改善蜗牛监测和在局部水平上更集中地控制尿血吸虫病。

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