藐小棘隙吸虫尾蚴直接感染终宿主的实验研究

EXPERIMENT ON DIRECT INFECTION OF DEFINITIVE HOSTS WITH ECHINOCHASMUS LILIPUTANUS CERCARIAE

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 paper reports the experiment in which nine dogs and two volunteers were in-fected with Echinochasmus liliputanus cercariae(1500 to 88000)directly through mouth.Thedogs were dissected in 3.5 hours to 34 days after infection. The results showed that all of ninedogs were infected and the worm recovery was 4.01%;the cercariae developed into metacercariain dog's stomach at 3. 5 hours after infection ;at eighth hour after infection,juvenile vvere found indog's intestine;at 13th day,juvenile developed into adults and eggs were found in host's stool.Intwo volunteers’faeces ,Echinochasmus liliputanus eggs were found for the first time at 15th and16th days respectively. It suggests that human and dogs can be infected through drinking raw wa-ter containing Echinochasmus liliputanus cercariae.