本实验为用藐小棘隙吸虫尾蚴直接经口感染终宿主人、犬的研究。９只幼犬分别喂以不同数量的尾蚴（４５００～８８０００条），于感染后３．５ｈ至３４ｄ分别解剖。结果实验犬藐小棘隙吸虫感染率为１００％，获虫率４．０１％；感染后３．５ｈ，部分尾蚴在胃中发育成囊蚴；８ｈ脱囊幼虫在小肠内发现；１３ｄ，幼虫发育成熟，虫卵在大便中被检获，两名志愿者分别口服尾蚴８４００条和１５００条，于感染后第１５ｄ、１６ｄ自粪中检获虫卵。结果提示人、畜生饮含有藐小棘隙吸虫尾蚴的水可致感染。 This experiment for the use of small spines cercariae directly orally infected host, the dog’s research. Nine puppies were fed a different number of cercariae (4500 ~ 88000), were infected 3.5h to 34d were dissected. The results showed that the infection rate was 100% and the infection rate was 4.01%. After 3.5h infection, part of cercariae developed metacercariae in the stomach. The larvae were found in the small intestine after 8 hours. When mature, the eggs were seized in the stool. Two volunteers orally taken 8400 cercariae and 1500 caterpillars respectively. The eggs were seized from the dung on the 15th day and the 16th day after infection. The results suggest that humans, livestock drink containing small spines cercariae water can cause infection.