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目的了解深圳市盐田河、葵涌河曼氏血吸虫中间宿主藁杆双脐螺的分布现状及其生态环境,为制定查灭螺对策提供科学依据。方法分别在盐田河、葵涌河目标河流的上、中、下游布点调查,圆形纱布捞网捕捞收集发现的螺体,实验室形态鉴定螺种。在捕捉螺的同时记录孳生河流生态环境、植被、水温、流速、pH值等。结果在盐田河的上、中游发现中等至较低密度的藁杆双脐螺,葵涌河下游查见藁杆双脐螺密度高;水质较好且缓流、水草丰富、腐植较多的水体环境,水温约16~25℃,藁杆双脐螺生长良好,数量多,平均螺体较大。结论藁杆双脐螺在深盐田河及葵涌河部分河段广泛存在,水体环境适宜藁杆双脐螺生长繁殖。
Objective To understand the distribution status and ecological environment of the double host snail of Schistosoma mansoni from the Yantianhe and Kwai Chung rivers in Shenzhen and provide a scientific basis for the development of the control strategy. Methods The investigation of the distribution of the target river in the Yantian River and Kwai Chung River was carried out in the upper, middle and lower reaches of the river. The snails were collected by round gauze fishing nets, and the spiral forms were identified in laboratory. In the capture of snails at the same time record breeding river ecological environment, vegetation, water temperature, flow rate, pH and so on. Results In the middle and upper reaches of the Yantian River, there was a medium-to-low density of Umbilical cord snakehead. The density of Umbellus umbellatus was high in the lower reaches of Kwai Chung River. Water environment with good water quality and slow flow, abundant aquatic plants and more humus , The water temperature is about 16 ~ 25 ℃, double rod snail good growth, the number of large, the average screw larger. Conclusion The double-snail is widely found in the deep Yantian River and part of the Kwai Chung River, and the water environment is suitable for the growth and reproduction of the double-snail.