450 soil samples of the garden were examined and 6 were positive in H. Diminuta with a contaminated rate of 1. 3%. Besides, the infection of domestic rat was confirmed as well.

• 采用饱和硝酸钠浮聚法检测庭院士样450份，阳性6份，污染率1．3%25．同时证实家鼠存在感染，缩小膜壳绦虫在当地人、鼠之间相互传播构成了流行的可能性。