金沙河、木其河均未采集到螺和蝲蛄。
The spiral vagina and crayfish were not found in Jinsha River and Muqi River .
在28例阳性者均有生食或半生食淡水蟹或蝲蛄史，以及饮用生溪水史；
Among the 28 positives , 26 cases had a history of eating raw freshwater crab or crayfishes and the other 2 cases drank freshwater from brook before .
蝲蛄