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在西印度岛的圣卢西亚地区,传播曼氏血吸虫病的扁卷螺(Biomphalaria glabra-ta)有静水与流水两种不同类型的孳生地。其中流水孳生地的螺口为曼氏血吸虫传播的主要原因,而静水孳生地的螺口在传播上的作用不大。因此,除去流水孳生地的螺群即可大大减少曼氏血吸虫的传播。
Biomphalaria glabra-ta, a manchurian schistosomiasis, is found in two different types of habitats in the region of Saint Lucia in West Indies, including still water and running water. One of the main reasons for the spread of Schistosoma mansoni is the screw hole of water breeding place, while the screw hole of still water breeding place has little effect on spread. Therefore, the removal of spiral breeding ground can greatly reduce the spread of Schistosoma mansoni.