日本棘隙吸虫生活史及流行学的研究

本文对日本棘隙吸虫Echinochasmus japonicus生活史各期进行了详细的描述补充了未被报告的蚴虫期,使生活史得以完整;调查并感染实验证实在我国纹沼螺是该吸虫第一中间宿主,18种螺、鱼和蝌蚪充当第二中间宿主(其中6种为新的中间宿主);首次报告本省纹绍螺及家禽自然感染情况;同时找出该吸虫病传播的新途径,为防治本病提供了科学依据.

Studies on the Life History an Epidemiology of Echinochasmus japonicas Tara 3,1926

The Present article deals with the life history and epidemiology of Echinochasmus japonicus, the former of which has hiterto not been completely worked out. The results are briefly given as follows:1.The developmental stages such as egg, miracidium, sporocyst, mother redia, daughter redia, cercaria, metacercaria, and adult worm are discribed in detail.2.The studies of its life history and epidemiology show that the cercariae of E. japonicus can encyst in the body of parafossarulus striatalus (Benson) and that there are metacercariae of E. japonics in the gill of tadpole or in the atrophic gill of small frogs. The metacercariae were fed to laboratory-reared dogs white rats and ducklings and a number of adult worms were secured from the small intestines of the animals. The studies also show that the Positive snails die, they spread into water pieces of tissues contains a large number of the metacercariae. Experiments have been conducted to infect dogs, white rats, and ducklings with the metacercariae taken from the water. The results show that these animals are all infected with the parasites. In the light of the above facts, the authors believe that if children drink water polluted by the metacercariae or play with the tadpole or small frogs carrying the metacer cariae, they may also be infected by the parasite.3.The first intermediate host in Fujian, China is P.striatulus and a total of 18 species of animals serve as the second intermediate-