| Abstract: | The duration of various development stages of
inside the intermediate host
were determined at different constant temperatures ranged from 12° to 30°C. The rate of development of sporocyst, redia, daughter redia and cercaria was accelerated as a result of increasing the temperature. Thus, an increase in the incubation temperatures from 15° to 30°C reduced the duration of sporocyst from 21 to 4 days, the redia from 37 to 11 days, daughter redia from 53 to 22 days and the cercaria from 73 to 25 days. At 12°C, the parasite developed to redial stage only and it required 51 days. Cercaria formation was observed at temperatures between 15 to 30°C. The highest cercaria output/snail was observed at 15°C and the lowest at 30°C. |
