Abstract
Observations made on the effect of various temperatures and hydrogen ion concentrations on the longevity of Schistosomatium douthitti miracidia showed both to be critical factors. The half-life of the miracidia varied from 1.5 hours at 35 °C to 11 hours at 8 °C, at a constant pH of 7.3. The effect of hydrogen ion concentration was less pronounced, the optimum being pH 7.5. A large population of miracidia from a single liver continued hatching over a 4-hour period with a peak output occurring at half an hour and another at 1 hour after exposure to water. The longevity of the miracidia hatching within the first hour exceeded that of the larvae hatching later.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
