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安县位于四川盆地边缘,龙门山脉中段山前地带,系平原、山区、丘陵兼有的地区,年平均气温16.3℃,年平均降雨量1280.3mm,境内沟河众多,塘堰、水库、冬水田形成密集的水系流域,具有华支睾吸虫中间宿主栖居繁殖的自然条件。华支睾吸虫病是人生食或半生食含有华支睾吸虫囊蚴的淡水鱼
An County is located at the edge of the Sichuan Basin and in the foreland belt of the middle section of the Longmen Mountains. It is an area with plains, mountains and hills. The annual average temperature is 16.3 ℃ and the annual average rainfall is 1280.3mm. There are many ditches in the territory, and the ponds, reservoirs and winter paddy fields are intensively formed Of the river basin, with the natural conditions of the dwelling habitat reproduction of Clonorchis sinensis intermediate host. Clonorchis sinensis is a freshwater fish containing Clonorchis sinensis metacercaria in human or semi-raw foods