In vitro cultivation of Fasciola hepatica metacercariae and of partially developed flukes recovered from mice |
| |
Authors: | Caroline Davies JD Smyth |
| |
Institution: | Department of Zoology and Applied Entomology, Imperial College of Science and Technology, Prince Consort Road, London SW7 2BB, England |
| |
Abstract: | Attempts were made to culture the metacercariae of Fasciola hepatica under a wide variety of conditions. Of the media tested, the most successful was NCTC 135 plus 50% heat inactivated chick serum and sheep red blood cells at 37°–38°C. In this medium, somatic development of newly excysted juveniles was similar to that of flukes recovered from the liver of a mouse 11 days post-infection. There was, however, no corresponding development of the genital rudiment. Various supplements, such as liver extract, bile, yeast extract, embryo extract, egg products, monolayer cells and diphasic media were tested, but none enhanced development. The effects of various physical parameters on growth and development in vitro were examined. Cultured metacercariae appeared to be in a state of ‘suspended animation’; when injected intraperitoneally into mice they developed into egg-producing adults. Flukes recovered from the abdomen and liver of mice continued their somatic growth in vitro but their genitalia failed to develop further. |
| |
Keywords: | somatic development genital rudiment development |
本文献已被 ScienceDirect 等数据库收录! |
|